Re-usable grillage system and methods for module transportation

Abstract

A method for transportation of modules 106a on marine vessels 100a comprises securing a plurality of grillage units 104 to a marine vessel cargo deck 108a which is supported by a plurality of deck fra

Description

Technical Field

[0001] The present disclosure relates generally to module transportation, and more particularly although not necessarily exclusively, to a re-usable grillage system and methods for module transportation. Background

[0002] A variety of onshore and offshore structures are fabricated in the energy and chemical industries. For example, in legacy energy markets, conventional drilling and production platforms, and refining facilities, are often fabricated in the vicinity of hydrocarbons, such as oil and gas reserves. In transition or renewable energy markets, large and complex structures are also often required, such as offshore wind farms or liquefied natural gas (LNG) or hydrogen facilities, just to name a few examples. Such facilities are very large, complex, and expensive. Construction projects for these sorts of facilities may involve hundreds or thousands of workers and take many months or years to complete. Thus, systems and methods are continually sought to make construction, repair, and maintenance of these facilities as efficient as possible. In some areas, where mobilization of workers is a concern due to environmental conditions, access, or other issues, it is convenient to implement modules already fabricated and commissioned elsewhere. Summary

[0003] The following presents a simplified summary of examples of methods of securing modules for transportation on marine vessels and re-usable marine vessel grillage systems to provide a basic overview for this disclosure. This summary is not an exhaustive overview. This summary is not intended to identify key, critical, and / or essential elements of the methods and systems disclosed herein or to fully delineate the scope of this disclosure. This simplified summary is a prelude to the more detailed description presented in the Detailed Description below.

[0004] As used below, any reference to a series of examples is to be understood as a reference to each of those examples disjunctively (e.g. "examples 1-4" is to be understood as "examples 1,2, 3, or 4").

[0005] Example 1 is a method of securing modules for transportation on marine vessels. The method includes securing several grillage units from a set of grillage units to a cargo deck of a marine vessel, the cargo deck supported by deck frames. In this example at least some of the grillage units include at least at least two connector elements spaced apart from one another by a connector element spacing distance. In this example securing the plurality of grillage units to the cargo deck includes, for the at least some of the grillage units, securing the connector elements to the cargo deck in alignment with at least two of the deck frames. The method further includes securing and transporting a module on the grillage units. The method further includes removing the grillage units from the cargo deck of the marine vessel and securing the grillage units to a second cargo deck of a second marine vessel, in which securing the grillage units to the second cargo deck includes, for the at least some of the grillage units, securing the connector elements to the second cargo deck in alignment with at least two deck frames of the second marine vessel.

[0006] Example 2 is the method of example 1 in which the at least two of the deck frames of the marine vessel are spaced apart by a first deck frame spacing distance, the at least two deck frames of the second marine vessel are spaced apart by a second deck frame spacing distance, and the first and second deck frame spacing distances are the same.

[0007] Example 3 is the method of example 1 in which the at least two of the deck frames of the marine vessel are spaced apart by a first deck frame spacing distance, the at least two deck frames of the second marine vessel are spaced apart by a second deck frame spacing distance, and the first and second deck frame spacing distances are different.

[0008] Example 4 is the method of example 3 further including, after removing the grillage units from the cargo deck of the marine vessel, for at least some of the grillage units, adjusting the connector element spacing distance to correspond to the second deck frame spacing distance.

[0009] Example 5 is the method of example 4 in which the step of adjusting the connector element spacing distance to correspond to the second deck frame spacing distance includes removing at least one connector element from the grillage unit and then reattaching the connector element at a different position on the grillage unit.

[0010] Example 6 is the method of example 5 in which removing the connector element includes removing the connector element from a beam of the grillage unit, and in which reattaching the connector element includes reattaching the connector element to the beam at a different location from where the connector element was removed. [0011 ] Example 7 is the method of examples 1 -6 in which the step of securing the grillage units from the set of grillage units to the cargo deck of the marine vessel includes fastening cargo deck connection surfaces of the connector elements to the cargo deck in alignment with the at least two of the deck frames of the marine vessel.

[0012] Example 8 is the method of example 7 in which fastening the cargo deck connection surfaces to the cargo deck includes welding the cargo deck connection surfaces to the cargo deck.

[0013] Example 9 is a re-usable marine vessel grillage system. The system includes a set of grillage units. Each grillage unit includes: a central beam with a first end and a second end; a first cross beam positioned at the first end of the central beam; a second cross beam spaced apart from the first cross beam and positioned at the second end of the central beam; a first group of connector elements including a first connector element extending from the first cross beam and a second connector element extending from the second cross beam; and a second group of connector elements including a third connector element extending from the first cross beam and a fourth connector element extending from the second cross beam. The first group of connector elements is spaced apart from the second group of connector elements by a connector element spacing distance. The connector element spacing distance is uniform throughout the set of grillage units.

[0014] Example 10 is the system of example 9 in which the central beam is a box girder, the first and second cross beams are first and second plate girders, the first group of connector elements include a first wing plate and a second wing plate, and the second group of connector elements includes a third wing plate and a fourth wing plate.

[0015] Example 11 is the system of example 10 in which the first and second wing plates are in a first linear arrangement; the third and fourth wing plates are in a second linear arrangement; and the first linear arrangement is parallel to the second linear arrangement.

[0016] Example 12 is the system of examples 10-11 in which the first and second plate girders are perpendicular to the box girder.

[0017] Example 13 is the system of examples 10-12 in which the first and second plate girders are parallel to one another.

[0018] Example 14 is the system of examples 9-13 in which the system is configured for use with a plurality of marine vessels.

[0019] Example 15 is the system of example 14 in which each of the marine vessels includes a cargo deck and deck frames supporting the cargo deck.

[0020] Example 16 is the system of example 15 in which at least some of the deck frames are separated from adjacent deck frames by a deck frame spacing distance in which the deck frame spacing distance is the same as the connector element spacing distance of the set of grillage units.

[0021] Example 17 is the system of example 15 in which each connector element of the first group of connector elements and the second group of connector elements includes a cargo deck connection surface weldable at a location on a cargo deck of a marine vessel; and in which the location is supported by a deck frame of the marine vessel.

[0022] Example 18 is the system of example 17 in which each grillage unit of the set of grillage units also includes at least four bearing plates positioned in a space between each of the first and second cross beams and the cargo deck.

[0023] Example 19 is the system of examples 9-18 in which the system is configured to support several modules; and in which each module includes a module deck and several module legs extending from the module deck.

[0024] Example 20 is the system of example 19 in which the central beam includes a top flange and at least one flange extension; and in which the top flange and the at least one flange extension are configured to support one of the module legs of one of the modules.

[0025] Example 21 is a method of securing modules for transportation on marine vessels in accordance with any of examples 1-8 using a re-usable marine vessel grillage system in accordance with any of examples 9-20. Example 22 is a re-usable marine vessel grillage system in accordance with any of examples 9-20 used in a method of securing modules for transportation on marine vessels in accordance with any of examples 1 -8. Brief Description of the Drawings

[0026] FIG. 1A is a side view of an example of a first marine vessel that can include a re-usable marine vessel grillage system according to some aspects of the present disclosure.

[0027] FIG. 1B is a side view of an example of a second marine vessel that can include the re-usable marine vessel grillage system according to some aspects of the present disclosure.

[0028] FIG. 2 is a perspective view of an example of a re-usable grillage system according to some aspects of the present disclosure.

[0029] FIG. 3 is a perspective view of another example of the re-usable grillage system according to some aspects of the present disclosure.

[0030] FIG. 4 is a perspective view of an example of a grillage unit for the reusable grillage system according to some aspects of the present disclosure. [0031 ] FIG. 5 is a perspective view of another example of a grillage unit for the re-usable grillage system according to some aspects of the present disclosure.

[0032] FIG. 6 is a flowchart of a method for securing modules for transportation on marine vessels according to some aspects of the present disclosure. Detailed Description

[0033] Aspects of the present disclosure generally include modularized design and construction features that can be used for onshore and offshore construction projects. Modules can be fabricated at one or more fabrication sites and transported to one or more service sites by a transportation vessel (e.g., a marine vessel). In this way, modules can be manufactured in a controlled environment, and then transported to the service sites for assembly and integration. Thus, the modules can be manufactured with improved efficiency and safety. Further aspects of this disclosure facilitate transportation of the modules to service sites.

[0034] More particularly, aspects of the present disclosure relate to a re-usable grillage system for module transportation. A grillage generally refers to a heavy-duty framework forming a foundation for transporting large and / or heavy loads. Prior to transporting a module, the module can be constructed at a fabrication site. Then, the module can be loaded onto a marine vessel using, for example, self-propelled modular transporters. The marine vessel may be a ship or floating platform, for example. Once the module is on the marine vessel, the re-usable grillage system can be used to secure the module. For example, the re-usable grillage system can include a set of reusable grillage units mounted on a cargo deck of the marine vessel. Securing the module using the re-usable grillage system can include positioning a portion of the module (e.g., a module leg of a module deck) on each one of the grillage units in the set. The re-usable grillage system can be designed to support a load from the module and forces imposed by the module on the marine vessel during transportation.

[0035] Each of the grillage units of the re-usable grillage system can include a variety of components for distributing the load from the module, supporting the forces applied during transportation by the module, and securing the grillage unit to the cargo deck of the marine vessel. In some implementations each grillage unit may include a central beam on which the portion of the module for transport can be positioned. The central beam may be a horizontal structural element that carries loads and resists bending, shear forces, and vertical loads. The central beam may be centrally located in the grillage unit. The central beam can be any type of beam (e.g., a box girder, a plate girder, an H-beam, etc.) positioned between other components of the grillage units, such as between the cross beams that are described in further detail below. The central beam may include one or more flanges joined by one or more webs. For instance, a box girder may include a top flange, a bottom flange, and two webs extending between and joining the top flange to the bottom flange.

[0036] In some examples, flange extensions may be coupled with a top flange of each central beam to increase a surface area of the part of the grillage unit on which the portion of the module is positioned (i.e., to increase a surface area of the top flange of the central beam). A flange (e.g., the top flange) can be horizontal plate of a beam, which may be made of metal, concrete, or another material with sufficient strength and rigidity for supporting at least a portion of the load from the module. The flange extensions may be plates couplable to a flange. The flange extensions may also be made of metal, concrete, or another material with sufficient strength and rigidity for supporting at least a portion of the load from the module. While coupled with the top flange, the flange extensions can extend outwardly from edges of the top flange, thereby increasing the surface area of a top of the cross beam on which the portion of the module may be positioned. Consequently, the flange extensions can distribute of the portion of load from the module that is on each grillage unit over the increased surface area.

[0037] Additionally, in some examples, the central beam may have a hollow center. Gussets may be positioned within the hollow center of each central beam and in contact with one or more flanges or webs of each central beam. The gussets can be metal sheets of various thicknesses used for joining two or more components together and / or for reenforcing the two or more components. For example, the components between which a gusset can be positioned can include the top flange and a side web of a central beam. As mentioned above, a flange (e.g., the top flange) can be horizontal plate of a beam (e.g., a horizontal plate of an I-beam, T-bar, H-beam, box girder, plate girder, or the like) while a web (e.g., the side web) can be a vertical plate of the beam. Thus, the gusset can be positioned near edges or surfaces at which the top flange and the side webs meet. The positioning and use of the gussets can increase a strength and rigidity of each of the components between which they are positioned (e.g., one or more flanges and webs of the central beam).

[0038] The central beam can be central in that the central beam is positioned between two or more cross beams of each of the grillage units. The cross beams can be positioned at ends of the central beam. Similar to the central beam, the cross beams may be horizontal structural elements that carry loads and resist bending, shear forces, and vertical loads. The cross beams can be any type of beam (e.g., a box girder, a plate girder, an H-beam, etc.) positioned at the ends of the central beam. The cross beams can be perpendicular to the central beam and parallel to one another to provide stability to the grillage units. In one example, the cross beams are plate girders, the central beam is a box girder, and the cross beams are positioned at two opposing ends of the box girder. In another example, the cross beams are plate girders, the central beam is a plate girder, and the cross beams are positioned at two opposing ends of the central plate girder.

[0039] Additionally, the grillage units can each include connector elements that extend from the cross beams. The connector elements may extend from the cross beams to provide additional stability and strength to the grillage units, and may serve as locations where the grillage units may be fastened on the cargo deck of the marine vessel. For example, a bottom surface of each connector element may be welded to the cargo deck of the marine vessel. In some examples, the connector elements can extend outwardly from opposing sides of each cross beam. In one particular example, the connector elements are wing plates that extend from opposing sides of a web of a plate girder. The wing plates may be triangular plates that can be welded, bolted, or otherwise coupled with a beam, such as the cross beams.

[0040] The spacing between the connector elements of a grillage unit may correspond to a deck frame spacing of the marine vessel on which the grillage units are intended for use. The deck frames may include any beam, girder, or the like positioned under the cargo deck to increase a strength and integrity of the cargo deck. The spacing between at least some of the deck frames can be uniform. For example, the spacing between at least some of the deck frames can be on the order of several meters, and in some examples, between 2.4 meters to 2.5 meters. A distance between the locations on cross beams from which the connector elements extend can also be uniform and can be substantially equivalent to spacing between deck frames. As a result, when the connector elements are welded to or otherwise coupled with the cargo deck, the connector elements can be on top of areas reinforced by the deck frames. In this way, a greater amount of the weight and force from the module (transmitted through the grillage units) can be focused on reinforced areas of the marine vessel than is focused on non-reinforced areas. This can prevent damage to the marine vessel and failure of the re-usable grillage system to support the module. [0041 ] Aspects of the present disclosure minimize or avoid having to develop a different grillage system for each combination of module being transported and marine vessel being used. Aspects of the present disclosure may also minimize or avoid having to develop a different grillage system based on the specific shape, size, and other configuration aspects of the module being transported and / or based on an internal structural arrangement of a marine vessel. Thus, the disclosed grillage system may be compatible with different types of marine vessels, avoiding the need to design a new grillage system, and thereby reducing engineering, procurement, delay and construction costs.

[0042] One such aspect of the disclosure is that the distance between connector elements at each grillage unit can correspond to the spacing between adjacent deck frames under a cargo deck of a marine vessel. The spacing between adjacent deck frames can be the same or similar at multiple marine vessels. For example, all or most of a particular type of marine vessel can have deck frames that are a particular distance apart (e.g., 2.4 meters apart). In addition to corresponding to the particular distance between deck frames, the distance between the connector elements can be uniform throughout the set of grillage units. Thus, any or most of the grillage units can be compatible with a marine vessel of the particular type. Other aspects of the grillage unit may also be uniform such as the size, shape, or positioning of the central beam, the cross beams, or the combination thereof to further facilitate the compatibility of the grillage unit with any marine vessel of the particular type.

[0043] The components (e.g., the central beam, cross beams, connector elements, etc.) of the grillage units can further be relatively compact in comparison with cargo decks of marine vessels. As a result, many grillage units can be positioned along a cargo deck in various orientations. In other words, the positioning of the grillage units on the cargo deck can be easily changed and highly adaptive, which can render the grillage units compatible with various modules being transported on the cargo deck. The grillage units can also be repositioned depending on a desired loading type for each module (e.g., longitudinal loading or transverse loading).

[0044] Additionally, different marine vessels (e.g., different types of marine vessels) may have the deck frames at different locations underneath the cargo decks. Consequently, there may be different spacing between adjacent deck frames under the cargo decks of different marine vessels. To account for this, the connector elements can be removed from and reconnected to the cross beams at different locations based on the deck frame spacing at a marine vessel at which the grillage units are to be used. In some examples, it may also be possible to remove and reconnect the central beam at different positions between the cross beams.

[0045] Thus, the connector element spacing and compact size of each of a set of re-usable grillage units enables the re-usable grillage system to be compatible with and re-used for transportation of numerous modules via numerous marine vessels. Additionally, individual grillage units within the set of re-usable grillage units can be reconfigured (e.g., the connector elements and / or the central beam can be repositioned) to enable further adaptation of the grillage units to different modules and marine vessels. This ability to reuse, reposition, and reconfigured the grillage units of the re-usable grillage system can decrease resource and manufacturing costs associated with module transportation in comparison with the current, non-reusable grillage systems.

[0046] These illustrative examples are given to introduce the reader to the general subject matter discussed here and are not intended to limit the scope of the disclosed concepts. The following sections describe various additional features and examples with reference to the drawings in which like numerals indicate like elements but, like the illustrative examples, should not be used to limit the present disclosure.

[0047] FIG. 1A is a side view of an example of a first marine vessel 100a having a re-usable marine vessel grillage system generally indicated at 200 for supporting an exemplary module 160a. (An example configuration of the re-usable grillage system 200 is further discussed in FIG. 2.) The re-usable marine vessel grillage system can be defined as a set of re-usable grillage units mountable to a cargo deck for receiving a module. The first marine vessel 100a is a ship. But in other examples, the first marine vessel 100a may be a platform or another floating arrangement.

[0048] The first marine vessel 100a includes a plurality of deck frames 102a-b, which can help to shape and support a cargo deck 108a of the first marine vessel 100a. The deck frames may be formed from wood, metal, or any other suitable structural material and may extend generally parallel to a water surface 105. The plurality of deck frames may be longitudinally and / or transversely extending along the cargo deck 108a. For example, the deck frames can include transverse frames that run across a width of the cargo deck 108a (i.e., substantially perpendicular to Axis A shown in FIG. 1A), which can provide rigidity to the cargo deck 108a by distributing loads and stresses across the cargo deck 108a. The transverse frames can include any beam, girder, or the like positioned and oriented under the cargo deck 108a substantially perpendicular to Axis A. Additionally or alternatively, the deck frames can include longitudinal frames oriented lengthwise along the cargo deck 108a (i.e., oriented substantially parallel to Axis A), which can further enhance the strength, rigidity, and overall structure of the cargo deck 108a. The longitudinal frames can similarly include any beam, girder, or the like positioned and oriented under the cargo deck substantially parallel to Axis A.

[0049] The re-usable grillage system 200 can facilitate safe and secure transportation of a module 106a by the first marine vessel 100a. For example, the re usable grillage system 200 can be used to secure the module 106a during transportation of the module 106a to a service site The module 106a can be any module to be transported from a fabrication site (e.g., a site at which the module is manufactured) to the service site (e.g., a site at which the module is integrated and used). Examples of modules can include process modules (e.g., chemical processing units), living quarter modules (e.g., prefabricated living spaces), electrical and mechanical modules (e.g., skids with pumps, generators, and electrical substations).

[0050] The re-usable grillage system 200 can include any number of grillage units (e.g., grillage unit 104), which can be positioned at various locations along the cargo deck 108a. The grillage units may be welded to the cargo deck 108a or the grillage units may be coupled to the cargo deck 108a with one or more connection elements such as screws, bolts, or welds. The locations along the cargo deck 108a at which the grillage units are positioned can be locations reinforced by the deck frames. At least some deck frames can be separated from adjacent deck frames a deck frame spacing distance. For example, deck frames 102a-b can be separated by a first deck frame spacing distance 112a. Additionally, the grillage unit 104 can include connector elements, which may extend from and be oriented substantially perpendicular to beams of the grillage unit to provide additional stability and strength to the grillage unit 104. The connector elements (e.g., wing plates) of the grillage unit 104 can be spaced apart a first connector element spacing distance, which can be equivalent to the first deck frame spacing distance 112a. Thus, positioning the grillage unit 104 at a reenforced location of the cargo deck 108a can include positioning the connector elements in locations on the cargo deck 108a with the deck frames underneath. The connector elements are shown and described in further detail below with respect to FIG. 4.

[0051] Additionally, the module 106a can be fastened to each of the grillage units using various methods (e.g., bolting, welding, lashing, or the like) to prevent movement of the module 106a during transportation. The configuration (e.g., positioning and design) of the grillage units can distribute a weight of the module 106a across the cargo deck 108a to prevent damage to the cargo deck 108a, the module 106a, or a combination thereof.

[0052] FIG. 1B is a side view of an example of a second marine vessel 100b that can use the same re-usable grillage system, generally indicated at 200, used with the first marine vessel 100a shown in FIG. 1A according to some aspects of the present disclosure. The second marine vessel 100b includes exemplary deck frames (e.g., deck frames 110a-b). The re-usable grillage system 200 can facilitate safe and secure transportation of another module 106b by the second marine vessel 100b. For example, the re-usable grillage system 200 can be used to secure the module 106b during transportation of the module 106b to a service site.

[0053] The re-usable grillage system 200 can include any number of grillage units (e.g., grillage unit 104), which can be positioned at various locations along a second cargo deck 108b of the second marine vessel 100b. Similar to the example shown in FIG. 1 A, the locations along the second cargo deck 108b at which the grillage units are positioned can be locations reinforced by the deck frames. For example, deck frames 110a-b can be spaced apart a second deck frame spacing distance 112b. The connector elements of the grillage unit 104 can be repositioned from being the first connector element spacing distance apart to a second connector element spacing distance apart. The second connector element spacing distance can be equivalent to the second deck frame spacing distance 112b. Consequently, the grillage unit 104 can be positioned on the second cargo deck 108b with the connector elements on areas reenforced by the deck frames 110a-b. The ability to reposition the connector elements based on the distance between adjacent deck frames can enable the re-usable grillage system 200 to be compatible with more than one marine vessel.

[0054] Although FIGS. 1A-1B show five grillage units for simplicity, it will be appreciated that the re-usable grillage system 200 may have any number of grillage units positioned at various orientations with respect to a cargo deck and deck frames. For example, the re-usable grillage system 200 of the marine vessels 100a-b may include twenty-four grillage units positioned in a grid-like manner across a length and width of a cargo deck, as shown in FIGS. 2-3.

[0055] FIG. 2 is a perspective view of the re-usable grillage system 200 according to an example configuration of the present disclosure. As shown, the reusable grillage system 200 can include a set of grillage units (e.g., including grillage unit 104) positioned along a cargo deck 208 of a marine vessel. The grillage units can be positioned in alignment with reinforced locations of the cargo deck 208, such as locations associated with deck frames.

[0056] After construction in a fabrication site, the modules can be loaded out by one or more modular trailer, such as a self-propelled modular transporter (SPMT) 204, onto the cargo deck 208 of the marine vessel. An SPMT is a robust type of a hydraulic modular trailer, which may comprise an array of wheels (not expressly shown in the figure) used for transporting massive objects. Although not required in every embodiment, a typical SPMT may also include a grid of computer-controlled axles, e.g., 2 axles across and 4-8 axles along. Two or more in series may be called an axle line. The axles may be individually controllable, in order to evenly distribute weight and to steer accurately. Each axle may also swivel, up to a full 360 degrees. The axles may be coordinated by the control system to allow the SPMT to turn, move sideways or even rotate in place. Some SPMTs allow the axles to telescope independently of each other so that the load can be kept flat and evenly distributed while moving over uneven terrain. A hydraulic power pack can be attached to the SPMT to provide power for steering, suspension and drive functions.

[0057] In the example shown, the re-usable grillage system 200 can be positioned and oriented on the cargo deck to facilitate transverse loading out and loading in of modules. That is, each grillage unit of the re-usable grillage system 200 can be positioned on the cargo deck a distance apart from adjacent grillage units. The distance between each grillage unit and adjacent grillage units can be sufficiently large such that one or more SPMTs can fit between the grillage units, as shown in FIG. 2 with SPMT 204 for example. As a result of the distance between each grillage unit and adjacent grillage units being large enough for one or more SPMTs, traverse loading out and loading in can be performed. The transverse loading out and loading in can occur in a direction parallel to axis B. That is, the SPMTs, for example, can move parallel to Axis B during the loading of the module on to the re-usable grillage system 200 of the cargo deck 208 (i.e., during transverse loading in) and during the removal of the module from the cargo deck 208 (i.e., during transverse loading out).

[0058] Additionally, the module can include a module deck 202, which can be an initial deck or platform onto which the module can be positioned before transportation. The module deck 202 can make up a bottom portion of the module and can be the interface between the grillage units and the module. The module deck 202 can include various supports (e.g., module leg 206) that can be positioned on and coupled with the re-usable grillage system 200. Therefore, once the module is loaded onto the cargo deck 208 via the SPMTs or via another suitable transportation method, the module can be fastened to the cargo deck 208 via coupling of the supports and the grillage units. For example, as shown, the module leg 206 can be positioned on and coupled with the grillage unit 104.

[0059] FIG. 3 is a perspective view of the re-usable grillage system 200 according to some aspects of the present disclosure. Similar to the example shown in FIG. 2, FIG. 3 shows the re-usable grillage system 200 with the set of grillage units (e.g., including grillage unit 104) positioned along the cargo deck 208 of the marine vessel. In contrast to FIG. 2, the re-usable grillage system 200 in FIG. 3 is being used for longitudinal loading out and loading in of modules. To enable the longitudinal loading out and loading in, the distance between each grillage unit and adjacent grillage units can be sufficiently large such that one or more SPMTs can fit between the grillage units, as shown with SPMT 204 in FIG. 3. As a result of the distance between each grillage unit and adjacent grillage units being large enough for one or more SPMTs, longitudinal loading out and loading in can be performed. The longitudinal loading out and loading in can occur in a direction parallel to axis C. That is, the SPMTs, for example, can move parallel to Axis C during the loading of the module on to the re-usable grillage system 200 of the cargo deck 208 (i.e., during longitudinal loading in) and during the removal of the module from the cargo deck 208 (i.e., during longitudinal loading out).

[0060] FIGS. 2 and 3 therefore provide an example of the versatility of the reusable grillage system 200 by showing the re-usable grillage system 200 being used for longitudinal loading in and loading out in FIG. 3 and being used for transverse loading in and loading out in FIG. 2. Consequently, a module can be loaded out or loaded in by self-propelled modular transporters (SPMTs) (e.g., SPMT 204) off of or on to the cargo deck 208 in a direction parallel to axis B or in a direction parallel to axis C. Once the module is loaded in (i.e., one the module is positioned on the reusable grillage system 200 on the cargo deck 208 via the SPMTs or via another suitable transportation method) the module can be fastened to the cargo deck 208 via coupling of the module legs and the grillage units. For example, as shown, the module leg 206 can be positioned on and coupled with the grillage unit 104.

[0061] In some examples of module transportation, longitudinal loading in and loading out may be desirable, while in other examples transverse loading in and loading out may be desirable. For example, a decision to perform transverse or longitudinal loading in and out can come from operational limitations such as, marine vessel capacity and stability, quay dimensions, tide, ballasting consideration, etc. As shown in FIGS. 2 and 3, a set of grillage units corresponding to the re-usable grillage system 200 can be used for both longitudinal and transverse loading in and loading out. As described in further detail below with respect to FIG. 4, the grillage units can be used for various types of loading due to the flexibility in positioning the grillage units with respect to the cargo deck. For example, connector elements of each of the grillage units can be spaced apart a distance that corresponds to deck frames under the cargo deck 208. The grillage units can therefore be mounted to the cargo deck 208 at any location or in any orientation so long as the connector elements are positioned on or near areas of the cargo deck 208 with deck frames underneath. Additionally, each of the grillage units can be relatively small in comparison with the cargo deck 208, thereby providing sufficient space for the different types of loading via the SPMTs.

[0062] FIG. 4 is a perspective view of an example of a grillage unit 400 for the re-usable grillage system 200 according to some aspects of the present disclosure. The grillage unit 400 in this example includes a central beam 402, two cross beams 410a-b, and eight connector elements 414a-d (only six of which are visible in the perspective view of FIG. 4). The grillage unit 400 in this example further includes two flange extensions 406a-b, four component stiffeners 412a-b (only two of which are visible), two angle irons 416 (only one of which is visible), four gussets 408a-b (only two of which are visible), and four bearing plates 418a-c (only three of which are visible). In other implementations a grillage unit may include other combinations and numbers of components. The grillage unit 400 can be part of a set of grillage units of the re-usable grillage system 200. For example, the grillage unit 400 can correspond to the grillage unit 104 depicted in FIGS. 2-3. The set of grillage units can be positioned on and coupled with one or more marine vessels (e.g., marine vessels 10Oa-b). Then, a module can be positioned on the marine vessel and fastened to the set of grillage units. For example, each of the grillage unit can support a module leg or other portion of the module. Thus, the components of the grillage unit 400 can interact to support and distribute a load from an associated module.

[0063] The central beam 402 can include a top flange for receiving a portion of the module and at least two ends at which the cross beams 41 Oa-b can be positioned. The central beam 402 can be made of steel, concrete, other suitable materials, or a combination of materials. The central beam 402 can be considered central due to its positioning between the cross beams 410a-b. Other positions and configurations of the central beam 402 and cross-breams 410a-b may be possible in other implementations.

[0064] In the particular example shown in FIG. 4, the central beam 402 can be a box girder. The box girder can be a type of beam that comprises a hollow crosssection. The box girder can include a top flange 420a, a bottom flange 420b, a first side web 422, and a second side web (not shown). The side webs of the box girder can extend between and be perpendicular to the top flange 420a and the bottom flange 420b. In the particular example, the outer side of each side web can be the ends of the box girder at which the cross beams 410a-b are positioned. The hollow crosssection can be defined by an inner wall of each of the flanges 420a-b and the side webs. The hollow cross section may be substantially box-shaped and may be positioned substantially in a center of the box girder. Due to the hollow cross-section, the box girder can have a relatively high strength-to-weight ratio. The box girder can further demonstrate a relatively high torsional stiffness. Thus, the box girder can be suitable for supporting the load associated with the module.

[0065] Although the box girder is shown, in other examples of the present disclosure, the central beam 402 can be another type of structural beam, such as another type of girder (e.g., a plate girder, tube girder, truss girder, rolled girder, etc.). In examples in which the central beam 402 is a plate girder, a top flange of the plate girder can support a portion of the module for transport. Then, each side of a web extending from and positioned perpendicular to the top flange can be the ends at which cross beams 410a-b are positioned.

[0066] As mentioned above, a top flange 420a of the central beam 402 can receive the module leg or other portion of the module. Consequently, the load associated with the module can be applied to the grillage unit 400 at the top flange 420a of the central beam 402. The additional components of the grillage unit 400 can then help to balance and distribute the load applied via the module. For example, the flange extensions 406a-b can be coupled with and extend from the top flange 420a. The flange extensions 406a-b can also be made of steel, concrete, others suitable materials, or a combination of materials. The flange extensions 406a-b can increase a width of the top flange 420a. As a result, the flange extensions 406a-b can increase a load-bearing capacity of the central beam 402 by distributing a force applied by the module leg on the central beam over a greater surface area. The increased surface area and load-bearing capacity provided by the flange extensions 406a-b can further render the central beam 402 compatible with a variety of modules of varying size, shape, and weight.

[0067] To further increase the load-bearing capacity of the central beam 402 and in examples in which the central beam 402 comprises a hollow cross section (e.g., in examples in which the central beam 402 is a box girder), one or more gussets 408a-b can be positioned within the hollow cross-section. To position the gussets 408a-b in the hollow cross-section, the gussets 408a-b can be positioned along an inner side of at least two of the top flange 420a, the bottom flange 420b, the first side web 422, and the second side web. For example, each gusset 408a-b can extend between the top flange 420a and first side web 422, the top flange 420a and second side web, the bottom flange 420b and the first side web 422, or the bottom flange 420b and the second side web. The gussets 408a-b can be plates or brackets and can increase the load-bearing capacity of the central beam 402 by providing additional strength and stiffness to parts of the central beams 402 (e.g., the top flange 420a, the bottom flange 420b, the first side web 422, the second side web, or the combination thereof) between which the gussets 408a-b extend.

[0068] In the example shown in FIG. 4, cross beams (e.g., a first cross beam 410a and a second cross beam 410b) are positioned at ends of the central beam 402. For example, as shown, the first cross beam 410a can be positioned at a first end embodied as an outer side of the first side web 422 and the second cross beam 410b can be positioned at a second end embodied as an outer side of the second side web. In other examples, the cross beams 410a-b can be positioned at each side of a single web of the central beam 402 or otherwise positioned at opposing ends of the central beam 402. Being positioned at the ends of the central beam 402 can include each of the cross beams 410a-b abuting to one of the ends of the central beam 402. While abuting the central beam, a side of each of the cross beams 410a-b (e.g., a side of web 426 facing an end of the central beam 402) can be welded, bolted, or otherwise coupled with the ends of the central beam 402.

[0069] In some examples, rather than abutting to the ends of the central beam, at least a portion of each of the cross beams 410a-b may transverse or overlap the ends of the central beam 402. In such examples, positioning the cross beams 410a-b at ends of the central beam 402 can include the cross beams 41 Oa-b being on the end surface of the central beam 402 but also inset relative to the end surface.

[0070] The cross beams 41 Oa-b can further be positioned perpendicular to the central beam 402. Examples of the cross beams 41 Oa-b can include I-beams, channel beams, T-bar beams, L-angle beams, T-type girders, rectangular girders, plate girders, etc. [0071 ] In the particular example shown, the cross beams 41 Oa-b can include a first plate girder and a second plate girder. The plate girders can be perpendicular to the box girder and parallel to one another. The second plate girder can be positioned at the outer side of the first side web 422 of the box girder. Similarly, the first plate girder can be spaced apart from the first plate girder and positioned at the outer side of the second side web of the box girder. Similar to the box girder, the plate girders can each include a top flange and a bottom flange (e.g., top flange 424a and bottom flange 424b). But, in contrast to the box girder, the plate girders can include a single web (e.g., web 426) that extends between the top and bottom flanges. The web of each of the plate girders may be the portion of the plate girders positioned at and coupled with the ends (e.g., the outer sides of the webs) of the central beam 402. The web of each of the plate girders can be coupled with the webs of the central beam 402 via welding, bolts, riveting, structural adhesives, other suitable coupling mechanisms, or a combination thereof.

[0072] Additionally, in some examples, component stiffeners can extend along webs of the cross beams 41 Oa-b. More specifically, the component stiffeners can extend along the cross beams 41 Oa-b in positions aligned with the ends of the central beam 402 (e.g., aligned with the webs of the box girder). In the particular example shown, the component stiffeners 412a-b can extend between the top and bottom flanges 424a-b and along the web 426 of the first cross beam 410a. The component stiffeners may transverse the cross beams 41 Oa-b and contact the ends of the central beam 402 (e.g., the first side web 422 and / or the second side web). As a result, the component stiffeners can reinforce the cross beams 41 Oa-b and can help to maintain the positioning of the cross beams 41 Oa-b at the ends of the central beam 402.

[0073] In the example of FIG. 4, the grillage unit 400 also includes a first group of connector elements and a second group of connector elements. The connector elements 414a-d can be welded, latched, bolted, or otherwise removably coupled to the cross beams 410a-b. The first group of connector elements can include a first connector element 414a extending from the first cross beam 410a and a second connector element 414b extending from the second cross beam 410b. The second group of connector elements can include a third connector element 414c extending from the first cross beam 410a and a fourth connector element 414d extending from the second cross beam 410b. Each connector element 414a-d may extend from two opposing sides (e.g., an inner side facing the central beam 402 and an outer side facing away from the central beam 402) of the associated cross beam. The first group of connector elements can be spaced apart from the second group of connector elements by a connector element spacing distance 404. The connector element spacing distance 404 at the grillage unit 400 can be the same at each grillage unit in the set of grillage units.

[0074] Each of the connector elements 414a-d can extend from two sides of the corresponding cross beam. For example, as shown in FIG. 4, the first connector element 414a can extend from an inner wall of the first cross beam 410a and from an outer wall of the first cross beam 410a. In this way, the connector elements 414a-d can provide additional surface area to the grillage unit 400 to further distribute the load from the module and improve the stability to the grillage unit 400. Additionally, the first and second connector elements 414a-b can be in a first linear arrangement and the third and fourth connector elements 414c-d can be in a second linear arrangement. The first linear arrangement can be parallel to the second linear arrangement and the distance between the first and second linear arrangements can be the connector element spacing distance 404.

[0075] The connector elements 414a-d can each further include a cargo deck connection surface, which can be welded to otherwise positioned on a cargo deck of a marine vessel. For example, a cargo deck connection surface of the first connector element 414a is indicated at 415. The cargo deck connection surfaces can be on bottom surfaces of each of the connector elements 414a-d. Additionally, the connector element spacing distance 404 between the groups of wing plates can correspond to an internal structure of one or more marine vessels. For example, the marine vessels can have deck frames for supporting the cargo deck. The deck frames can be spaced apart web frames with a deck frame spacing distance (e.g., two meters) therebetween. The deck frame spacing distance can be equivalent to the connector element spacing distance 404. Thus, when the cargo deck connection surfaces of the connector elements 414a-d are welded to or otherwise positioned on one of the marine vessels, the connector elements 414a-d can be positioned on or near reinforced locations of the cargo deck (e.g., locations associated with deck frames). As a result, a load transferred to the connector elements 414a-d from the positioning of the portion of the module on the central beam 402 can be applied to the marine vessel in reinforced locations, which can minimize a risk of damage to the marine vessel. Additionally, as a result of the connector element spacing distance 404 being uniform across the set of grillage units and equivalent to the deck frame spacing distance, the grillage units can be reused for any marine vessel with deck frames spaced apart that deck frame spacing distance (e.g., 2.4 meters or 2.5 meters).

[0076] In the particular example shown, the connector elements 414a-d can be wing plates. Specifically, in the example shown, the wing plates can be substantially triangular plates. In other examples, the wing plates may be substantially rectangular or another suitable shape. Additionally, in other examples, the connector elements 414a-d can be gusset plates, bracket plates, base plates, etc.

[0077] In the example shown in FIG. 4 the grillage unit 400 also includes bearing plates 418a-c. The grillage unit 400 may include two bearing plates per cross beam. Thus, the grillage unit 400 may include four bearing plates (three are shown). In other examples, a different number of bearing plates may be used. The bearing plates 418a-c can further distribute the load of the module leg. The bearing plates 418a-c can be flat rectangular plates or may be another suitable shape. The bearing plates 418a-c can be made of steel, concrete, or other suitable materials. In some examples, there can be a space (e.g., a space of about 50 millimeters) between the bottom flanges of the cross beams 41 Oa-b and the cargo deck (e.g., the outer surface) of the marine vessel. The bearing plates 418a-c can be positioned in the space to distribute the force of the bottom flanges to the deck frames 102a-b or 110a-b of the marine vessel. In other words, the bearing plates 418a-c can provide a stable and even surface for transferring the load of the module to the cargo deck in strong areas (e.g., areas reenforced by deck frames). This, in turn, can prevent localized stress and potential failure at the cargo deck.

[0078] In the example shown in FIG. 4 the grillage unit also includes angle irons. The angle irons (e.g., angle iron 416) can be positioned adjacent to the bottom flanges of the cross beams 41 Oa-b and the cargo deck. For example, as shown in FIG. 4, a first extension member of the angle iron 416 is in contact with the bottom flange of the first cross beam 410a and a second extension member of the angle iron 416 is in contact with the cargo deck. The angle irons can provide structural integrity against shear forces from friction between the cross beams 410a-b and the cargo deck. Therefore, the combination of the cross beams 41 Oa-b, the central beam 402, the flange extensions 406a-b, the connector elements 414a-d, the bearing plates 418a-c, the angle irons 416, and the gussets 408 can enable the grillage unit 400 to support a variety of loads from a variety of modules. For example, the grillage unit 400 may be able to withstand a load of around two thousand tons.

[0079] Additionally, at least some of the components of the grillage unit 400 can be adjustable. For example, the positioning of the central beam 402 between the cross beams 410a-b can be adjustable. That is, the central beam 402 can be positioned toward the first group of connector elements, toward the second group of connector elements, or somewhere between the groups of connector elements depending on a configuration of a module (e.g., locations of one or more module legs). Repositioning (e.g., adjusting) the central beam 402 can include thermally or mechanically removing the ends of the central beam 402 from the cross beams 410a-b, and then re-welding or otherwise re-adhering the central beam 402 elsewhere between the cross beams 410a-b. Additionally or alternatively, the cross beams 410a-b can include a series of holes, latches, or the like via which the ends of the central beam 402 can be bolted, latched, or otherwise coupled with each of the cross beams 41 Oa-b.

[0080] Locations along the cross beams 41 Oa-b at which the connector elements 414a-d are coupled can also be adjustable. For example, a first marine vessel (e.g., first marine vessel 100a) may include deck frames (e.g., web frames) that are 2.5 meters apart. Thus, the first group of connector elements and the second group of connector elements can be positioned 2.5 meters apart. In another example, the grillage unit 400 may be used at a second marine vessel (e.g., second marine vessel 100b) in which the deck frames may be 2.4 meters apart. In such an example, the first group of connector elements and the second group of connector elements can be repositioned to be 2.4 meters apart. Similar to the central beam 402, repositioning the third and fourth connector elements 414c-d can include thermally or mechanically removing the connector elements 414a-d from the cross beams 41 Oa-b, and then rewelding or otherwise re-adhering the connectors elements 414a-d elsewhere along the cross beams 410a-b. Additionally or alternatively, the cross beams 410a-b can include a series of holes, latches, or the like via which the connector elements 414a-d can be bolted, latched, or otherwise coupled with each of the cross beams 410a-b. The adjustability of the connector elements 414a-d and central beam 402 can facilitate the use of the grillage unit 400 with various modules and marine vessels. [0081 ] FIG. 5 is a perspective view of another example of a grillage unit 500 for the re-usable marine vessel grillage system according to some aspects of the present disclosure. The grillage unit 500 can be used in a reusable grillage system configured to allow longitudinal loading in and loading out of a module. Similar to the grillage unit 400, the grillage unit 500 can include cross beams 510a-b, which can be removably coupled with a central beam 502. For example, the cross beams 51 Oa-b can be bolted, latched, welded, or adhesively coupled with the central beam 502. The cross beams 51 Oa-b can be greater in length than the cross beams 41 Oa-b of FIG. 4 to provide additional support for the module and to provide a greater distance along which the central beam 502 can be repositioned. As shown in FIG. 5, the central beam 502 and the cross beams 51 Oa-b can be girders. More specifically, the central beam 502 can be a box girder while the cross beams 51 Oa-b can be plate girders. In other examples, the central beam 502 or the cross beams 51 Oa-b can be other suitable types of girders or beams (e.g., delta girders, tube girders, truss girders, rolled girders, etc.).

[0082] Additionally, the grillage unit 500 can include connector elements 514a-d. The connector elements 514a-d can be wing plates, gusset plates, base plates, etc. In some examples, a first connector element 514a can extend from a first cross beam 510a and a second connector element 514b can extend from a second cross beam 510b. Additionally, a third connector element 514c can extend from the first cross beam 510a and a fourth connector element 514d can extend from the second cross beam 510b. A distance between a first group of connector elements (e.g., the first and second connector elements 514a-b) and a second group of connector elements (e.g., the third and fourth connector element 514c-d) can be equivalent to a distance between two deck frames (e.g., deck frames 102a-b shown in FIG. 1) of a marine vessel.

[0083] Thus, when the grillage unit 500 is positioned on the marine vessel, the connector elements 414a-d can be positioned on or near the deck frames. In some examples, the grillage unit 500 can be coupled with the marine vessel by welding or otherwise coupling the connector elements 514a-d on a cargo deck of the marine vessel on top of or near the deck frames. Additionally, the grillage unit 500 can include bearing plates, which can be positioned in a space between each of the cross beams 510a-b and the cargo deck (e.g., the outer surface) of the marine vessel. Thus, when the grillage unit 500 is positioned on the marine vessel the bearing plates and the connector elements 514a-d can be in contact with the outer surface of the marine vessel.

[0084] Additionally, a portion of the module can be secured to the grillage unit 500. For example, the central beam 502 include a top flange to which the portion of the module can be coupled. To increase a strength of the central beam 502 there can be one or more gussets 508 coupled with the central beam 502. There can also be component stiffeners (e.g., components stiffeners 512a-b), angle irons 516a-b, or a combination thereof coupled with each of the cross beams 510a-b to further increase a stability and strength of the grillage unit 500 for securing the module.

[0085] FIG. 6 is a flowchart of a method 600 for securing modules for transportation on marine vessels according to some aspects of the present disclosure. In other examples, the method 600 can include more steps, fewer steps, different steps, or a different order of the steps depicted in FIG. 6. The steps of FIG. 6 are described below with reference to components discussed above in FIGS. 1-5.

[0086] At block 602, the method 600 can involve securing a plurality of grillage units from a set of grillage units to a cargo deck 108a of a first marine vessel 100a. The set of grillage units can include any number of the grillage unit 400 or of the grillage unit 500. At least some of the grillage units secured to the cargo deck 108a can have at least two connector elements. The connector elements can be metal plates, beams, or the like that extend from a cross beam of each of the grillage units to provide a location on the grillage units to be secured (e.g., welded) to the cargo deck 108a. Once secured to the cargo deck, the connector elements can also help to stabilize the grillage units (e.g., by resisting bending, shear forces, and vertical loads). In the example shown in FIG. 4, the connector elements 414a-d are wing plates. In other examples, the connector elements may be gusset plates, bracket plates, base plates, or another suitable type of plate or beam that can be secured to the cargo deck 108a. The grillage units may include two cross beams each having at least one connector element. The cross beams can be parallel to one another and positioned on opposing sides of the central beam. For example, FIG. 4 shows the central beam 402, which in this case is a box girder, with cross beams 410a-b disposed parallel to one another on opposing sides of the central beam 402. FIG. 4 further shows a first connector element 414a and a third connector element 414c extending from a first cross beam 410a as well as a second connector element 414b and a fourth connector element 414d extending from a second cross beam 410b.

[0087] The at least two connector elements of the grillage units may be spaced apart from one another by a connector element spacing distance. For example, as shown in FIG. 4, the first connector element 414a and the third connector element 414c are spaced apart connector element spacing distance 404. More specifically, the first connector element 414a is disposed on the first cross beam 410a in a first position and the third connector element 414c is disposed on the first cross beam 410a in a second position. Consequently, the connector element spacing distance is the distance between the first position and the second position. The example of FIG. 4 further shows the second connector element 414b and the fourth connector element 414d as also being spaced apart the connector element spacing distance 404. In particular, the second connector element 414b is disposed on the second cross beam 410b in a first position and the third connector element 414c is disposed on the second cross beam 410b in a second position, with a distance between the first and second positions being the connector element spacing distance 404. As a result, and as shown in FIG. 4, the first and second connector elements 414a-b are in a first linear arrangement and the third and fourth connector elements 414c-d are in a second linear arrangement.

[0088] Additionally, the cargo deck 108a to which the grillage units are secured may be supported by a plurality of deck frames (e.g., deck frames 102a-b). At least some of the deck frames (e.g., deck frames 102a-b) of the cargo deck 108a may be spaced apart a first deck frame spacing distance 112a (e.g., 2.5 meters apart). The connector element spacing distance 404 may be the same as the first deck frame spacing distance 112a. As such, securing the plurality of grillage units to the cargo deck 108a can include securing the connector elements to the cargo deck 108a in alignment with at least two of the deck frames. For example, securing grillage unit 400 to cargo deck 108a may include securing the first connector element 414a and the second connector element 414b in alignment with a first deck frame 102a. Securing grillage unit 400 to cargo deck 108a may further include securing the third connector element 414c and the fourth connector element 414d in alignment with a second deck frame 102b.

[0089] Securing the grillage units to the cargo deck 108a can include welding a cargo deck connection surface of each of the at least two connector elements of each of the grillage units on the cargo deck 108a. More specifically, the cargo deck connection surfaces of each of the connector elements may be welded to the cargo deck 108a in the alignment with the at least two of the deck frames of the first marine vessel 100a. The cargo deck connection surfaces can be on bottom surface of each of the connector elements 414a-d. Thus, a bottom surface of each connector element can be welded to the cargo deck 108a in alignment with a deck frame. Examples of a set of grillage units secured to a cargo deck 208 are shown in FIGS. 2 and 3. Additionally, grillage units secured in alignment with deck frames are shown in FIG. 1A. For example, FIG. 1A shows grillage unit 104 secured in alignment with deck frames 102a-b.

[0090] At block 604, the method 600 can involve securing and transporting a module on the plurality of grillage units. For example, the module can include a module deck. The module deck can be a platform that can be secured to the grillage units. For example, the module deck can include a plurality of supports (e.g., module legs) which can each be secured to the central beam of each of the grillage units. An example of a module leg 206 secured to a central beam of a grillage unit 104 is shown in FIG. 2. The module leg 206 may be secured to the central beam of the grillage unit 104 via bolts, welds, clamps, other suitable coupling mechanisms, or a combination thereof. [0091 ] Once secured, the module may be transported by the first marine vessel 100a while secured on the grillage units. The module 106a may transported from a fabrication site (e.g., a site at which the module is manufactured) to a service site (e.g., a site at which the module is integrated and used). Examples of the module can include process modules (e.g., chemical processing units), living quarter modules (e.g., prefabricated living spaces), electrical and mechanical modules (e.g., skids with pumps, generators, and electrical substations).

[0092] At block 606, the method 600 can involve removing the plurality of grillage units from the cargo deck 108a of the first marine vessel 100a. For example, after the module is transported to the service site via the first marine vessel 100a, the grillage units can be removed from the first marine vessel 100a to enable use of at least some of the grillage units at another marine vessel. The grillage units may be removed from the first marine vessel 100a by thermally or mechanically removing the welding of the cargo deck connection surfaces of the connector elements to the cargo deck 108a. Mechanically removing the welding can include using a cutting tool, such as an angle grinder or plasma cutter, to cut through the welding to separate the connector elements from the cargo deck 108a. Thermally removing the welding can include applying heat, such as by using a torch or heat gun, to soften the welding to enable the connector elements to be separated from the cargo deck 108a.

[0093] At block 608, the method 600 can involve securing the plurality of grillage units to a second cargo deck 108b of a second marine vessel 100b. The second cargo deck 108b can be supported by deck frames (e.g., deck frames 110a-b). Securing the grillage units the second cargo deck 108b can include, for at least some of the plurality of grillage units, securing the connector elements to the second cargo deck 108b in alignment with at least two deck frames of the second marine vessel 100b. For example, the cargo deck connection surfaces of the connector elements, which were previously welded to the cargo deck 108a, may welded to the second cargo deck 108b in alignment with deck frames.

[0094] In some examples, a second deck frame spacing distance 112b between at least two of the deck frames of the second marine vessel 100b can be the same at the first deck frame spacing distance 112a between at least two of the deck frames between the first marine vessel 100a. Thus, least some of the grillage units that were removed from the first marine vessel 100a can be used on the second marine vessel 100b. Alternatively, in some examples, the second deck frame spacing distance 112b between at least two deck frames of the second marine vessel 100b can be different from the first deck frame spacing distance 112a. For example, the second deck frame spacing can be 2.4 meters while, as mentioned above, the first deck frame spacing distance 112a may be 2.5 meters.

[0095] In examples in which the second deck frame spacing distance 112b is different from the first deck frame spacing distance 112a, a positioning of at least some of connector elements of at least some of the grillage units can be adjusted prior to the grillage units being secured to the second cargo deck 108b.. For example, the first position at which the first connector element 414a extends from the first cross beam 410a can be adjusted. Additionally, a second positioned at which the second connector element 414b extends from the second cross beam 410b can be adjusted. The first position of the first connector element 414a and the second position of the second connector element 414b can be adjusted based on the second deck frame spacing distance 112b. For example, the first connector element 414a can be repositioned on the first cross beam 410a to be closer to the third connector element 414c such that the connector element spacing distance 404 becomes 2.4 meters rather than 2.5 meters. Similarly, the second connector element 414b can be repositioned on the second cross beam 410b to be closer to the fourth connector element 414d such that the connector element spacing distance 404 becomes 2.4 meters rather than 2.5 meters. Repositioning the first and second connector elements 414a-b can include removing the first and second connector elements 414a-b from the first and second cross beams 410a-b respectively. For example, the connector elements 414a-d may each be welded, latched, bolted, or otherwise removably coupled to the cross beams 41 Oa-b. Thus, repositioning the first and second connector elements 414a-b can include removing the welds, unlatching, unbolting, or otherwise removing the first and second connector elements 414a-b from the first and second cross beams 41 Oa-b and then welding, latching, bolting, or otherwise coupling the first and second connector elements 414a-b on the first and second cross beams 41 Oa-b in new positions based on the second deck frame spacing distance 112b.

[0096] In other examples, a first position at which the third connector element 414c extends from the first cross beam 410 and a second position at which the fourth connector element 414d extends from the second cross beam 410b can be adjusted based on the second deck frame spacing distance 212b. Moreover, positions of all four of the connector elements 414a-d may be adjusted in some examples. In any case, after the adjustment to the positioning of the first and second connector elements 414a-b, the third and fourth connector elements 414c-d, or the combination thereof, the connector element spacing distance 404 can be the same and the second deck frame spacing distance 212b (e.g., 2.4 meters). Additionally, after the repositioning of the first and second connector elements 414a-b, the third and fourth connector elements 414c-d, or the combination thereof, the first and second connector elements 414a-b may still be in a first linear arrangement and the third and fourth connector elements 414c-d may still be in a second linear arrangement. Consequently, the connector elements 414a-d can be secured to the second cargo deck 108b in alignment with at least two deck frames of the second marine vessel 100b.

[0097] The foregoing description of certain examples, including illustrated examples, has been presented only for the purpose of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Numerous modifications, adaptations, and uses thereof will be apparent to those skilled in the art without departing from the scope of the disclosure.

Claims

What is claimed is:

1. A method of securing modules for transportation on marine vessels, the method comprising:(a) securing a plurality of grillage units from a set of grillage units to a cargo deck of a marine vessel, the cargo deck supported by a plurality of deck frames;wherein at least some of the plurality of grillage units comprise at least at least two connector elements spaced apart from one another by a connector element spacing distance; andwherein securing the plurality of grillage units to the cargo deck comprises, for the at least some of the plurality of grillage units, securing the connector elements to the cargo deck in alignment with at least two of the deck frames;(b) securing and transporting a module on the plurality of grillage units; and(e) removing the plurality of grillage units from the cargo deck of the marine vessel and securing the plurality of grillage units to a second cargo deck of a second marine vessel, wherein securing the plurality of grillage units to the second cargo deck comprises, for the at least some of the plurality of grillage units, securing the connector elements to the second cargo deck in alignment with at least two deck frames of the second marine vessel.

2. The method of claim 1, wherein: the at least two of the deck frames of the marine vessel are spaced apart by a first deck frame spacing distance, the at least two deck frames of the second marine vessel are spaced apart by a second deck frame spacing distance, and the first and second deck frame spacing distances are the same.

3. The method of claim 1, wherein: the at least two of the deck frames of the marine vessel are spaced apart by a first deck frame spacing distance, the at least two deck frames of the second marine vessel are spaced apart by a second deck frame spacing distance, and the first and second deck frame spacing distances are different.

4. The method of claim 3, further comprising, after removing the plurality of grillage units from the cargo deck of the marine vessel, for at least some of the plurality ofgrillage units, adjusting the connector element spacing distance to correspond to the second deck frame spacing distance.

5. The method of claim 4, wherein the step of adjusting the connector element spacing distance to correspond to the second deck frame spacing distance comprises removing at least one connector element from the grillage unit and then reattaching the connector element at a different position on the grillage unit.

6. The method of claim 5, wherein removing the connector element comprises removing the connector element from a beam of the grillage unit, wherein reattaching the connector element comprises reattaching the connector element to the beam at a different location from where the connector element was removed.

7. The method of claim 1, wherein the step of securing the plurality of grillage units from the set of grillage units to the cargo deck of the marine vessel comprises:fastening cargo deck connection surfaces of the connector elements to the cargo deck in alignment with the at least two of the deck frames of the marine vessel.

8. The method of claim 7, wherein fastening the cargo deck connection surfaces to the cargo deck comprises welding the cargo deck connection surfaces to the cargo deck."Amendments to the claims have been filed as follows."21 05 25ClaimsWhat is claimed is:

1. A method of securing modules for transportation on marine vessels, the method comprising:(a) securing a plurality of grillage units from a set of grillage units to a cargo deck of a marine vessel, the cargo deck supported by a plurality of deck frames;wherein at least some of the plurality of grillage units comprise at least two connector elements spaced apart from one another by a connector element spacing distance; andwherein securing the plurality of grillage units to the cargo deck comprises, for the at least some of the plurality of grillage units, securing the connector elements to the cargo deck in alignment with at least two of the deck frames;(b) securing and transporting a module on the plurality of grillage units; and(e) removing the plurality of grillage units from the cargo deck of the marine vessel and securing the plurality of grillage units to a second cargo deck of a second marine vessel, wherein securing the plurality of grillage units to the second cargo deck comprises, for the at least some of the plurality of grillage units, securing the connector elements to the second cargo deck in alignment with at least two deck frames of the second marine vessel;wherein: the at least two of the deck frames of the marine vessel are spaced apart by a first deck frame spacing distance, the at least two deck frames of the second marine vessel are spaced apart by a second deck frame spacing distance, and the first and second deck frame spacing distances are different.

2. The method of claim 1, further comprising, after removing the plurality of grillage units from the cargo deck of the marine vessel, for at least some of the plurality of grillage units, adjusting the connector element spacing distance to correspond to the second deck frame spacing distance.

3. The method of claim 2, wherein the step of adjusting the connector element spacing distance to correspond to the second deck frame spacing distance comprisesremoving at least one connector element from the grillage unit and then reattaching the connector element at a different position on the grillage unit.

4. The method of claim 3, wherein removing the connector element comprises removing the connector element from a beam of the grillage unit, wherein reattaching the connector element comprises reattaching the connector element to the beam at a different location from where the connector element was removed.

5. The method of claim 1, wherein the step of securing the plurality of grillage units from the set of grillage units to the cargo deck of the marine vessel comprises:fastening cargo deck connection surfaces of the connector elements to the cargo deck in alignment with the at least two of the deck frames of the marine vessel.

6. The method of claim 5, wherein fastening the cargo deck connection surfaces to the cargo deck comprises welding the cargo deck connection surfaces to the cargo deck.21 05 25

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