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2385results about "Building roofs" patented technology
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Modular panel system
A modular shelter, is provided having an assembly of at least one each of a modular wall panel, modular floor portion, and modular roof panel. The modular wall panel having a sill plate, top plate, plurality of vertical studs extending therebetween, and a skin with a first edge having a waveform profile for connecting to an adjacent modular panel; and one of the vertical studs being an end stud and having a first connector element configured to be secured to a first complementing connector element of an adjacent second modular panel; and further each modular roof panel has a peak crosspiece, bottom crosspiece, and plurality of rafters, with the first rafter having an engagement member to be engaged with a complementary engagement member of another modular roof panel, and further a second connector element configured to be secured to a second complementing connector element of a second modular roof panel.
Owner:ATOMIC DESIGN INC
Reinforced roof structure of a prefab modular shed
The present subject matter discloses a novel roof designs of a blow-molded storage shed that enhances structural stability while ensuring ease of assembly and disassembly. The roof assembly features a beam support frame with multiple interconnected beam columns and crossbars, providing robust support for the roof structure. A central roof panel, equipped with an embedded seamless folding groove, folds to create a roof peak during installation. Additionally, side roof panels are connected to the central roof panel, forming a cohesive and durable roof assembly. This design optimizes both strength and ease of construction.
Owner:YIXIANG BLOW MOLDING FURNITURE (NINGBO) CO LTD
Two-span continuous stiff overhanging large-span roof structure adopting direct tensioning technology
Owner:CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
Building and method for constructing building
Owner:SEKISUI HOUSE KK
Quickly installed, expandable, and modularly designed louver awning
A quickly installed, expandable, and modularly designed louver awning includes several leg tubes, a ring beam frame disposed on upper ends of the leg tubes, and a louver system disposed on the ring beam frame. The ring beam frame includes several ring beams slidably installed on the leg tubes, ring beam linings are firmly disposed in ends of the ring beams, and the ring beam linings are connected to the leg tubes through first fasteners. The ring beams and the leg tubes are connected through leg tube linings and the ring beam linings, so that structural strength of the ring beams and the leg tubes is increased, a part quantity is reduced, assembly is easier to operate with a smaller error, and the fasteners are not exposed, thereby providing better aesthetic appearance.
Owner:ZHEJIANG YOTRIO GRP CO LTD
Structural Composite Wall and Building System
PendingUS20250146276A1Building roofsRoof covering using slabs/sheetsArchitectural engineeringComposite beams
A composite wall and building system. The composite wall and building system provide a structural beam formed of fiberglass composite having one or more flanges that engage with an insulation member. The structural beam may be formed in a variety of dimensions and profiles. A plurality of structural beams is used together to form a wall or other parts of the building. A panel is used to cover the beams and insulation. The wall sections are joined together with interlocking beams and fasteners are used to secure the beams to each other and wall sections to other wall sections. The composite beams and insulation are coated with a fire-retardant material. A modified beam is used in certain applications for additional strength and connection points with other preexisting wood structures.
Owner:KROHMER DIETER ROLAND
Prefabricated large-span reinforced concrete floor capable of being assembled and adjusted
The invention relates to the technical field of constructional engineering, in particular to a prefabricated large-span reinforced concrete floor capable of being assembled and adjusted. The floor slab comprises a prefabricated reinforced concrete slab with the length extending in the front-back direction, the front side and the rear side of the lower end face of the prefabricated reinforced concrete slab are each provided with a set of lap joint parts extending downwards, and a bottom support assembly fixed to the lower end face of the prefabricated reinforced concrete slab is arranged between the two lap joint parts; the bottom support assembly comprises a plurality of bottom support units which are arranged at intervals in the front-back direction, the bottom support units are symmetrically arranged in the front-back direction with the center of the prefabricated reinforced concrete slab as the center, the lower end of the bottom support unit in the middle is lower than the lower ends of the bottom support units on the two sides, and a prestress inhaul cable is connected between the two lap joint parts. And the lower end of each collet unit is supported and fixed on the prestressed inhaul cable. The bottom support assembly and the prestress inhaul cable are adopted to replace a lower flange and a web, the self weight is light, meanwhile, the lap joint part is arranged, the contact area of the floor and a building structure is increased, stress is reduced, assembling is convenient, and safety is improved.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED
Foldable photovoltaic car shed
The utility model relates to the technical field of photovoltaic car sheds, and discloses a foldable photovoltaic car shed which comprises two sets of supports, fixing shafts are rotationally installed in the supports, and the two sets of fixing shafts are fixedly connected with a base. The fixing head is separated from the fixing groove through the movement of the control block, then the photovoltaic panel I is stored by moving the moving rod, and a worker can rotate the gear I through the operation of the double-shaft motor and the transmission of the threaded rod, so that the inclination angle is adjusted or the photovoltaic panel I is folded and stored. Compared with a traditional device, through operation of the fixing mechanism and the telescopic mechanism, the first photovoltaic panel is stored, then the folding mechanism is operated through the driving mechanism, the inclination angle of the first photovoltaic panel is changed, folding storage is completed, the energy absorption efficiency can be improved, folding rain prevention can be achieved, the service life of the device is guaranteed, and the device is convenient to use. And the photovoltaic panel I is prevented from being damaged.
Owner:TIANJIN DEYING NEW ENERGY TECHNOLOGY DEVELOPMENT CO LTD
Full-tension spoke type crossed cable truss structure system and construction method thereof
The invention provides a full-tension spoke type crossed cable truss structure system and a construction method thereof, and relates to the technical field of building structures, the full-tension spoke type crossed cable truss structure system comprises a first supporting column system, a second supporting column system, a first pressing ring beam, a second pressing ring beam, a first crossed cable net, a second crossed cable net, a first inner ring cable structure, a second inner ring cable structure, slings and a diagonal bridging, the first pressing ring beam is fixedly connected with the first supporting column system, one end of the second supporting column system is fixedly connected with the first pressing ring beam, the other end of the second supporting column system is fixedly connected with the second pressing ring beam, the first crossed cable net is connected with the first pressing ring beam and the first inner ring cable structure, and the second crossed cable net is connected with the second pressing ring beam and the second inner ring cable structure. The sling is connected with the first crossed cable net and the second crossed cable net, and the diagonal bridging is hinged to the first supporting column system and the second supporting column system. The method has the beneficial effects that compressive yield failure is avoided, the method can adapt to complex load conditions, the force transmission path is clear, and the rigidity requirement of a super-large-span structure is met.
Owner:THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
Expandable Building Systems and Related Methods
A building assembly can comprise two or more roof trusses, one or more ceiling panels, and two or more walls. Each of the roof trusses can comprise one or more upper chords, a lower chord, and a plurality of braces that each extend between and are coupled to one of the upper chord(s) and the lower chord. A first one of the ceiling panels can be fixed to the lower chord of each of the roof trusses of the building assembly. Each of the walls can be coupled to one of the ceiling panel(s) and can be pivotable between a stowed position in which the wall is substantially parallel to the first ceiling panel and a deployed position in which the wall is substantially perpendicular to the first ceiling panel.
Owner:HARVEY JAMES F
shed
Owner:JINGNING MEIGE TECH SERVICE CO LTD
Leakage-proof color steel plate roof connecting structure and mounting method thereof
The invention relates to the technical field of color steel plate roofs, in particular to a leakage-proof color steel plate roof connecting structure and a mounting method thereof.By arranging pressing strips and sealing strips, the connecting ends of adjacent color steel plates can be pressed and sealed, so that water seepage at the joints of the adjacent color steel plates is effectively avoided, and the service life of the color steel plates is prolonged. And through the arrangement of the ridge plate, the rubber pressing strip and the water stop strip, the connecting end of the two color steel plate roofs can be sealed, so that the situation of ridge water leakage is prevented, and the use effect is good.
Owner:CHINA MCC22 GROUP CORP LTD +1
Movable cultivated land cultivation system
The utility model discloses a movable cultivated land cultivation system which comprises double rows of rails and a movable cultivation room arranged on the double rows of rails, the movable cultivation room comprises a middle moving body, walking wheels are arranged at the four corners of the bottom of the middle moving body, and a driving mechanism is arranged on the middle moving body; two captive frames are symmetrically arranged on the left side and the right side of the middle moving body, and the bottom of each captive frame is a full-empty opening; transverse hanging rods are further arranged above the fences on the front side and the rear side of each captive breeding frame, and a plurality of foodstuff troughs are hung on the transverse hanging rods. A steel frame roof is jointly erected on the tops of the two captive frames; the movable breeding house is arranged in the field cultivated land in a movable mode, beans, green feed and the like for feeding animals to eat can be freely planted in the cultivated land, the animals can be directly and freely stocked in the field in the movable breeding house, and the animals can also have a rest and shelter from wind and rain in the movable breeding house. The feeding effect is better.
Owner:程火明
Expandable Building Systems and Related Methods
A wall assembly can comprise wall segments including at least two pivotable wall segments that are each pivotably coupled to at least one other of the wall segments such that the wall assembly is movable between folded and unfolded states. In the folded state, at least two wall segments can extend in a widthwise direction, at least four wall segments including the pivotable wall segments can extend in a lengthwise direction that is substantially perpendicular to the widthwise direction, and the wall assembly can have an interior volume circumscribed by the wall segments. In the unfolded state, at least four wall segments including at least two of the pivotable wall segments can extend in the widthwise direction, at least two wall segments can extend in the lengthwise direction, and the wall assembly can have an interior volume circumscribed by four walls defined by at least six of the wall segments.
Owner:HARVEY JAMES F
Damping structure of metal roof steel framework building
The invention relates to the technical field of metal roof steel architecture buildings in general building structures, in particular to a damping structure of a metal roof steel architecture building. The device comprises steel structure stand columns, steel structure cross beams, arch-shaped upper suspension rods and metal roof panels. The left end and the right end of each steel structure cross beam are installed at the top ends of the two symmetrical steel structure stand columns. The middle of the arched upper suspension rod is located above the steel structure cross beam, the two ends of the arched upper suspension rod in the length direction correspondingly penetrate through suspension rod through holes formed in the two ends of the steel structure cross beam respectively, and the two ends of the arched upper suspension rod in the length direction are connected with the inner sides of the two steel structure stand columns through straight hole bolt limiting assemblies respectively. The left and right ends of the steel structure cross beam are mounted at the top ends of the steel structure stand columns through arc hole bolt spring limiting assemblies; and the metal roof panel is mounted on the arched upper suspension rod and the steel structure cross beam through the elastic universal assembly. The overall damping performance of the building can be effectively improved, and the safety of the overall structure of the building is better ensured.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
Prefabricated conical shell steel supporting structure capable of being hoisted for squat silo construction
The invention discloses a prefabricated conical shell steel supporting structure capable of being hoisted for squat silo construction. The prefabricated conical shell steel supporting structure comprises a conical shell wall plate assembly, a ring beam assembly, a radial beam, a lifting lug assembly, an adjustable supporting assembly, an anti-swing assembly, a connecting assembly, an auxiliary positioning assembly and a sling connecting assembly. Core components such as the conical shell wall plate and the supporting framework are all prefabricated in a factory, the quality is controllable, splicing and hoisting are only needed on site, high-altitude erecting operation is greatly reduced, the high formwork erecting risk and the hidden danger of falling objects from high altitudes are reduced, hoisting stability is high, safety is improved, hoisting stress is dispersed through the lifting lug stiffening plates, and the hoisting efficiency is improved. The anti-swing assembly and the cable wind rope cooperatively control swing, it is ensured that the overall hoisting process is stable, structural collision and stress overload are avoided, the splicing precision is high, the adaptability is high, adjustability during installation is achieved through the adjustable supporting assembly arranged on the squat silo top, and it is ensured that the hoisted steel supporting structure can accurately fall on the preset position of the squat silo top.
Owner:SHANXI ERJIAN GRP CO LTD
Anti-skid structure of large-gradient planting roof
The utility model provides a large-slope planting roof anti-skid structure which is characterized in that reinforced concrete retaining walls arranged in a quincunx shape are arranged outside a large-slope roof structural slab, and pebble drainage ditches and L-shaped steel plates are arranged on the upper sides of the reinforced concrete retaining walls. A heat preservation layer, a reinforced concrete face plate, a mortar leveling layer, a waterproof layer, a puncture-resistant waterproof layer, a mortar waterproof protection layer, a fine aggregate concrete waterproof protection layer, a drainage plate, an isolation layer and a planting soil layer are sequentially arranged on the outer side of a structural plate of the reinforced concrete retaining wall and the outer side of a structural plate of the large slope roof. A mortar leveling layer, a waterproof layer, a puncture-resistant waterproof layer, a mortar waterproof protection layer, a drainage plate, an isolation layer and a planting soil layer are sequentially arranged on the top of the reinforced concrete retaining wall. An anti-skid assembly is installed in the planting soil layer, the anti-skid assembly is provided with an anti-skid lattice assembly and a connecting component, and the anti-skid lattice assembly is provided with anti-skid lattices and tying belts; according to the anti-slip structure, the steel consumption is reduced, and the overall anti-slip capacity of the joint is improved.
Owner:SHANGHAI BAOYE GRP CORP
Construction method for arched large-span shell steel roof
The invention provides a method for constructing an arch-shaped large-span shell steel roof, and belongs to the technical field of arch-shaped large-span shell steel roof construction. A temporary supporting system is built, and distributed optical fiber sensors are arranged to monitor the lifting process of a main arch; a cable force distribution scheme of a cable supporting system is calculated by adopting a double-layer game optimization model to realize cooperative control of stress uniformity and form precision, tensioning force is applied by using an intelligent tensioning system in stages, and a crane moving path is planned in combination with a path optimization algorithm based on a graph theory to realize graded unloading of a temporary supporting system. The technical problem that it is difficult to achieve structural stress uniform distribution and form accurate control of an arched large-span shell steel roof at the same time in the tensioning process of a cable supporting system is solved.
Owner:济南市历城区公用事业和房屋征收服务中心 +1
Protective shed for building construction
The utility model relates to the technical field of building construction safety, and discloses a protective shed for building construction, which comprises a concrete platform, a stand column for supporting is fixedly mounted at the top of the concrete platform, a cross beam for supporting is fixedly mounted at the top of the stand column, and a guardrail for protection is fixedly mounted on one side of the stand column. An iron frame used for reinforcing is fixedly installed at the top of the cross beam, and a ceiling used for protection is fixedly installed at the top of the iron frame. According to the protective shed for building construction, the cross beams and the guardrails are arranged in a matched mode, the top of the protective shed can be fixedly supported through the guardrails, the collapse condition is avoided, the guardrails can protect the two sides of the protective shed, normal construction is guaranteed, and the reliability of the protective shed is improved; the ceiling can be fixedly supported through the iron frame, so that the ceiling is protected, the situation that the device topples over is avoided, meanwhile, mounting and dismounting are convenient, and the practicability of the device is improved.
Owner:HEBEI VOCATIONAL & TECHN COLLEGE OF BUILDING MATERIALS
Opening and closing roof system
The utility model relates to the technical field of building design, in particular to a retractable roof system which comprises an arched roof and a retractable roof, a circular opening is formed in the center of the arched roof, and the retractable roof is arranged on the arched roof and composed of a plurality of petal-shaped roof pieces. The roof piece can move in the radial direction of the arched roof so as to be switched between an open state and a closed state, and in the open state, the circular opening is completely exposed; and in the closed state, the retractable roof completely covers the circular opening to form a closed dome structure. According to the opening and closing roof system, the roof pieces are driven to move in the radial direction along the arched roof so as to be switched between the opening state and the closing state, the indoor space and the outdoor space of a venue can be switched, natural conditions are fully utilized, and the opening and closing roof system has the advantages of being novel in opening and closing mode, reasonable in structural stress, convenient to drive and control and the like. And the structural form of the retractable roof system is enriched.
Owner:SHANGHAI ARCHITECTURAL DESIGN & RES INST
Container-based house for large-span structure and mounting method
The invention belongs to the technical field of fast assembly houses, and discloses a container-based house for a large-span structure and a mounting method, a plurality of containers are arranged in two rows, and the two rows of containers are oppositely arranged in pairs; the two opposite containers are connected through an arched roof truss; corner connecting pieces are arranged at the corners of the container; a sliding groove assembly is installed at the top of the container and comprises a sliding groove rail with a sliding groove, a sliding seat is installed in the sliding groove of the sliding groove rail in a sliding mode, a sliding connecting piece is installed on the sliding seat, a fixing bolt ball is arranged at the top of the sliding connecting piece, and the end of the arch roof truss is connected with the fixing bolt ball. According to the invention, the movable installation and repeated disassembly and assembly of the house for the large-span structure can be realized, the problems of bearing horizontal thrust and releasing temperature stress of a large-span building structure supported on the top of the container are solved, and meanwhile, the sliding adjustment connection between the roof truss structure and the support structure can also be realized.
Owner:CHINESE PEOPLES LIBERATION ARMY UNIT 32181
Composite structure including a structural panel and a metal support
A composite structure for a building that includes at least one structural panel and at least one metal corrugated panel, where the at least one structural panel is secured to said at least one metal corrugated panel.
Owner:UNITED STATES GYPSUM CO
Distributed energy collaborative management device of intelligent linkage carport
The invention relates to the technical field of intelligent parking lots, and discloses a distributed energy collaborative management device of an intelligent linkage shed, which comprises an intelligent charging parking area for parking new energy vehicles, and two signal transmission assemblies for receiving and transmitting signals are arranged on one side of the upper end of the intelligent charging parking area. A plurality of protection units used for protecting vehicles are arranged at the upper end of the intelligent charging parking area, each protection unit comprises a photovoltaic power generation assembly used for photovoltaic power generation and a sweeping assembly used for sweeping the surface of the photovoltaic power generation assembly, and the photovoltaic power generation assemblies facilitate smooth flowing of dirty water when photovoltaic power generation panels are cleaned by accurately adjusting the angles, so that the cleaning efficiency is improved. The water storage assembly and the water sprinkling mechanism provide continuous water source supply, so that the photovoltaic panel can be automatically cleaned, surface dirt is removed, the power generation efficiency of the photovoltaic panel is kept, the high efficiency of the cleaning process is guaranteed through coordinated work of the linear displacement mechanism and the sweeping assembly, and the workload of maintenance personnel is reduced.
Owner:JIANGSU ZHONGMAOTONG INTELLIGENT TECH CO LTD
Integrated joint sealing system
An integrated joint sealing system that is incorporated into the edges of a sheathing panel, which also may have a factory bonded weather resistive barrier. The edges of each panel are configured as a shiplap joint, or similarly functioning joint, that is present as either an overlap or underlap on each of the four panel edges. The arrangement of the joints are such that one edge will have an overlap and the opposite edge will have an underlap. A flexible gasket material (or materials) is factory applied to one or both sides (underlap and / or overlap) of the shiplap joint. This flexible gasket material, when overlapped with adjacent shiplap panels, provides a weather resistive seal to limit both water and air penetration.
Owner:LOUISIANA PACIFIC CORP
Construction method of large-span truss steel structure roof
The invention discloses a construction method for a large-span truss steel structure roof. The construction method comprises the following steps that 1, roof splicing is completed on a floor slab surface; the joint shaft joint outer lug plate is fixed to the roof; 2, the roof is lifted upwards through a lifting system, and after the roof is lifted to the first height, the assembling jig frame is disassembled; 3, a joint shaft joint inner lug plate fixed to the end of the bifurcated column is inserted between the two joint shaft joint outer lug plates, and a pin shaft is inserted into a pin shaft hole in the lug plate; 4, the roof is lifted step by step, and in the lifting process, the bifurcated columns are adjusted to be in the vertical posture from the inclined posture; continuously lifting the roof to the designed height; and 5, adjusting the posture of the bifurcated column, and connecting the lower end of the bifurcated column with the top of the supporting column. The method solves the problems that the joint shaft of the bifurcated column is difficult to install, the bifurcated column cannot be hoisted in place in a high-altitude narrow space, and the pin shaft of the joint shaft of the bifurcated column is high in high-altitude assembly difficulty.
Owner:CHINA CONSTR SECOND BUREAU INSTALLATION ENG CO LTD +2
Solar carports, solar-tracking carports, and methods
A solar tracking carport comprises a supporting structure including a foundation and at least two columns; a three-dimensionally rigid canopy deck having a length from a first edge to a second edge of at least one car, the deck including one or more upper blocks, each upper block being rigid in its longitudinal direction, each upper block including at least one solar panel; a deck frame configured to support the one or more upper blocks, the deck frame including a torque transmitting member; a rotation enabling connection configured to rotatably connect the torque transmitting member to the at least two columns; and a drive system configured to control tilting of the deck about the supporting structure over one axis of rotation to a first maximum angle in a first direction and to a second maximum angle in a second direction.
Owner:KBFX LLC
Self-adaptive temperature adjustment steel structure roof truss system
The invention relates to a self-adaptive temperature regulation steel structure roof truss system, which comprises a roof truss body, a steel roof truss, a steel roof truss enclosure structure, a temperature control system and a temperature control system, and is characterized in that the roof truss body comprises a steel roof truss and a steel roof truss enclosure structure; the first support systems are arranged at four corners of the steel roof truss; the second support system is arranged in the middle of the four sides of the steel roof truss; the temperature compensation coordination system comprises an electric heat conduction device and cooling holes, and the electric heat conduction device is annularly laid on the inner wall of the box beam; the cooling hole is formed in the side wall of the box beam and is communicated with a cold supply system; the monitoring system comprises a deformation monitoring assembly and a temperature monitoring device, the deformation monitoring assembly is coupled to at least one of the roof truss body, the first support system and the second support system, and the temperature monitoring device is installed on the roof truss body; and the monitoring control platform is coupled with the temperature compensation coordination system and the monitoring system. According to the design, the steel structure roof truss does not completely depend on the temperature change of the external environment any more, but can actively adapt and adjust, and the stability and durability of the steel structure roof truss are enhanced.
Owner:BEIJING URBAN CONSTR GROUP
Unmanned aerial system kiosk
ActiveUS12304657B2Building roofsIndication of weather conditions using multiple variablesLanding zoneRemote sensing
A kiosk for use an unmanned aerial system (UAS) delivery system is disclosed. In one embodiment, the kiosk includes an enclosure comprising at least one vertical wall having a secured entrance therethrough to prevent unauthorized persons from entering the enclosure, wherein an external appearance of the enclosure corresponds to a location of the kiosk; a landing zone for an unmanned aerial vehicle (UAV) of the UAS located within the enclosure, the landing zone comprising infrastructure from which the UAV can take off and on which the UAV can land; sensors for detecting an environment of at least one of the kiosk and the enclosure; and a guidance system for providing signals to the UAV to guide the UAV into the enclosure and onto the landing zone.
Owner:TEXTRON INNOVATIONS INC
Ring-shaped roof structure system of stadium with rigid outside and flexible inside and construction method of ring-shaped roof structure system
PendingCN120443783ABuilding roofsBuilding material handlingClassical mechanicsMechanical engineering
The invention discloses an outer-rigid and inner-flexible stadium annular roof structure system and a construction method thereof. The system comprises an outer rigid structure and an inner flexible structure. The peripheral rigid structure comprises supporting columns, V-shaped supporting pieces and a grid frame. The supporting columns are radially distributed on the outer ring of the annular roof structure around the center of the annular roof structure. The V-shaped supporting pieces correspond to the supporting columns one to one and are located on the inner sides, opposite to the supporting columns, of the roof structure. The grid frame is fixed to the top ends of the supporting columns and the V-shaped supporting pieces. The inner flexible structure comprises an annular cable and a radial cable; the ring cable is arranged on an inner ring of the roof structure; one end of the radial cable is fixed with the V-shaped supporting piece, and the other end is fixed with the ring cable. A giant outer pressing ring form of a traditional cable bearing structure is abandoned, the peripheral rigid structure and the inner surrounding flexible structure are combined, the rigidity of the peripheral rigid structure is used as a support of the flexible structure, the stress mode of the grid frame structure is improved, the rigidity of the inner surrounding cable structure is improved, and the steel consumption of the peripheral rigid structure is reduced.
Owner:ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE
Insulated Floor System for Grade or Basement Floors
Insulating floor system including (i) a grooved base layer formed from base layer grooved portions, (ii) a transverse peripheral edge rail formed from transverse peripheral edge rail portions, (iii) a parallel peripheral edge rail formed from parallel peripheral edge rail portions, and (iv) interior rails formed from interior rail portions. The base layer includes grooves in an upper surface. Each of the transverse peripheral edge rail portions include a plurality of downwardly projecting mating protrusions that mate within the base layer grooves. Each of the parallel peripheral edge rail portions include a downwardly projecting protrusion that mates within a peripheral groove of the base layer. At least one of the interior rails can be a locking rail, where locking rail portions defining the locking rail include a plurality of downwardly projecting mating protrusions that mate within terminal grooves of adjacent base layer grooved portions, locking such portions together.
Owner:BLUE TOMATO