Non-welded seismic retrofit catwalk

Abstract

The present invention relates to a non-welded seismic retrofit catwalk that is easy to construct and has excellent seismic performance by using only anchors, bolts / nuts, and screws without field welding. This invention can fundamentally eliminate the risk of fire caused by on-site welding, has minimal impact on the condition of the installation site, and is not significantly constrained by the shape of the catwalk (work passage), while significantly improving the duration, difficulty, and unit cost of manufacturing and construction. Furthermore, it enables smooth structural (calculation) review and ensures structural stability through the ease of structural reinforcement.

Description

Technology Field

[0001] The present invention relates to a product that is easy to construct and has excellent seismic performance by using only anchors, bolts / nuts, and screws without field welding when installing a catwalk (work passage) for the installation or maintenance of new installations in the ceiling of a building. Background Technology

[0002] In modern buildings, fixed catwalks (work passages) are often installed in the space between the slab and the ceiling or as exposed walkways for the installation, replacement, or maintenance of new installations, or for use in lobbies, auditoriums, movie theaters, theaters, etc., where the ceiling height is high.

[0003] This relates to a manufactured product that is easy to construct and has excellent seismic performance by using only anchors, bolts / nuts, and screws without field welding. The problem to be solved

[0004] Catwalks (work passages) are typically manufactured and installed using the steel pipe welding method because the concrete slabs to be installed are not perfectly level and they must be manufactured and installed in non-standard shapes due to building members such as beams. Consequently, it has become impossible to verify the risk of fire and welding defects caused by on-site welding, and structural stability cannot be proven, resulting in significant differences in quality and cost depending on the skill level of the contractor. means of solving the problem

[0005] Accordingly, the present invention comprises vertical and horizontal main members made of prefabricated square pipes (50*100, 2.3T, hereinafter omitted) and reinforcing members made of prefabricated square pipes (20*40, 1.6T, hereinafter omitted), and the joint connecting members of each member are structured to have a stiffness greater than that of the main members. By minimizing the number of main member joint connecting members to 3 types and reinforcing member joint connecting members to 2 types, it is made easy to construct while maintaining excellent seismic performance by using only anchors, bolts / nuts, and screws without field welding. Effects of the invention

[0006] By using prefabricated square pipes for the main and reinforcing members and a total of five types of joint connection members, construction is performed using only anchors, bolts / nuts, and screws without field welding, thereby fundamentally eliminating the risk of fire caused by field welding. Furthermore, it has become easier to adjust the height and width of the catwalk (work passageway), and the production and construction period has been significantly reduced, the difficulty of production and construction has been significantly lowered, and the unit cost of production and construction has been significantly reduced. In addition, by using prefabricated square pipes for the main members, structural (calculation) review can be performed smoothly, and structural stability has also been ensured by facilitating the additional installation of reinforcing members based on structural (calculation) review according to the design (load) required by the user. Brief explanation of the drawing

[0007] FIG. 01 is a perspective view illustrating a preferred embodiment of the "non-welded seismic retrofit catwalk" of the present invention. Fig. 02 is a 'detailed view of the connection between a concrete slab and a main member'. Figures 03 and 04 are ‘detailed drawings of the connection between a vertical main member and a horizontal main member’. Fig. 05 is a 'detailed view of the connection between the main member and the reinforcing member'. Fig. 06 is a ‘detailed view of the connection between reinforcing members and reinforcing members’. Specific details for implementing the invention

[0008] The present invention will be described in detail below according to the attached drawings and preferred embodiments.

[0009] First, marking is performed on the concrete slab of the building according to the design (plan) requested by the client.

[0010] Fig. 02 is a 'detailed view of the connection between a concrete slab and a main member'.

[0011] After connecting a dedicated bracket (01) to a concrete slab with a wedge anchor (02), a vertical main member is connected with a dedicated bolt and nut (10). The dedicated bracket (01) connected to the concrete slab can rotate 360 ​​degrees left and right, and the vertical main member connected to the dedicated bracket (01) can rotate 90 degrees up and down on one side, so that even if the concrete slab is not horizontal, it can be absorbed and corrected, allowing the building to always be installed vertically relative to the ground.

[0012] All vertical main members of the quantity designed by the above method are constructed.

[0013] Figures 03 and 04 are ‘detailed drawings of the connection between a vertical main member and a horizontal main member’.

[0014] Marking is performed on the locations where the horizontal main members are to be installed, according to the design (height) required for the previously constructed vertical main members.

[0015] The 'T-shaped' connection between the vertical main member and the horizontal main member is connected using a dedicated bracket (03-1) and a dedicated bolt / nut (10) to match the indicated height, and the 'L-shaped' connection between the vertical main member and the horizontal main member is connected using a dedicated bracket (03-2) and a dedicated bolt / nut (10). The connection between the dedicated bracket (03-1) and the dedicated bracket (03-2) and the vertical main member is manufactured so that the vertical main member can pass through, allowing for accurate height adjustment. If necessary later, any excess vertical main member that has passed through the dedicated bracket (03-1) and the dedicated bracket (03-2) can be cut and finished using a dedicated PVC cap for the end piece. The horizontal main member is connected to the dedicated bracket (03-1) and the dedicated bracket (03-2) using a dedicated bolt / nut (10) of the designed length.

[0016] The preliminary assembly is completed by finely adjusting the angles and lengths of the main structural members (vertical and horizontal main members) assembled as described above.

[0017] Once the preliminary assembly is complete, the dedicated bracket (01), dedicated bracket (03-1), dedicated bracket (03-2) and the main structural members (vertical and horizontal main members) are fixed using a hexagonal head dedicated piece (11) to complete the assembly.

[0018] Install a 38*38*38T FRP grating (06) according to the shape of the fully assembled horizontal main member.

[0019] FIG. 05 is a 'detailed view of the connection between the main member and the reinforcing member'.

[0020] Marking is performed on the existing vertical main members at the locations where reinforcing members are to be installed, according to the required design (height).

[0021] Reinforcing members are connected to the vertical main member using a hexagonal head dedicated piece (11) at the indicated height. The connection between reinforcing members is made using a dedicated bracket (05) and a hexagonal head dedicated piece (11). The height of the reinforcing member is basically set to be installed at a height of 90 cm or more and 120 cm or less from the floor so that it can also serve as a safety railing. The number of reinforcing members installed is increased or decreased after structural (calculation) review according to the design (load) requested by the user. Explanation of the symbols

[0022] 01. Dedicated Bracket (57*152*106.6*2.8T) _ For Concrete Slab Joining 02. Wedge Anchor (M12-100) 03-1. Dedicated 'T' Type Bracket (246*127*98.8*2.8T) _ For Joining Vertical / Horizontal Members 03-2. Dedicated Bracket 'L' Type (177*126*98.8*2.8T)_ For Joining Vertical / Horizontal Members 04. Dedicated Bracket (90.5*30*22*2.0T)_ For joining vertical / reinforcement members 05. Dedicated Bracket (82.5*68.5*44.5*2.0T)_ For joining reinforcement / reinforcement members 06. FRP Grating (38*38*38T) 10. Dedicated Bolt & Nut Set 11. Hexagonal head screw

Claims

Claim 1 An installation method for a non-welded seismic retrofit catwalk in which a dedicated bracket for joining concrete slabs rotates 360 degrees left and right, and a vertical main member is partially capable of rotating 90 degrees up and down on one side, thereby allowing the structure to always remain vertical to the ground even when the condition of the concrete slab is poor. Claim 2 An installation method in which the connection between the dedicated bracket and the vertical main member on the catwalk is manufactured so that the vertical main member can pass through, allowing for precise height adjustment, and if necessary later, the excess vertical main member that has passed through the dedicated bracket can be cut and finished using a dedicated PVC cap for the end. Claim 3 An installation method that allows for the pre-assembly of the dedicated bracket (01), dedicated bracket (03-1), dedicated bracket (03-2) and main structural members (vertical and horizontal main members) on a catwalk using dedicated bolts and nuts (10), fine adjustment of angles and lengths, and full assembly using a hexagonal head dedicated piece (11). Claim 4 A method of using FRP grating (06) as a stepping material on a catwalk.

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