ZSJH
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ZSJH supplies Welded Steel Frame Assemblies for Factory Buildings as defined shop-welded subassemblies. Columns, beam segments, brackets and bracing interfaces are assembled and checked before dispatch. The approved boundary between shop welds and site connections is coordinated with the assembly envelope, transport and erection. Applications include factory bays, production extensions and industrial frame sections. The delivered object is a welded assembly; a welding-only scope is quoted separately.
Item | Specification |
Eave height | 6 m reference; customized to drawings. Clear working height is checked separately. |
Longitudinal grid | 6 / 9 / 12 / 18 m reference options; frame loads and spacing require design review. |
Span | 20 m and above as a reference project requirement, subject to structural design. |
Layout example | 60 m length × 24 m width; 24 m single span; 6 m eave height; ten 6 m longitudinal bays. Illustrative only. |
Shipping envelope | Specify assembly length × width × height, mass, lifting points and designed site joints. |
Building width on the column axes equals one span or the sum of multiple spans; length follows the number and spacing of bays. A full-span welded frame is not automatically shipped as one piece. Door openings, roof bracing, purlin seats and crane or equipment interfaces must be shown in the approved details. Crane actions require more than a lifting-capacity figure: wheel reactions, lateral actions and operating requirements must be established by the project designer.
4 Materials and welding specifications
Item | Specification |
Steel | Q235B or Q355B options; other grades subject to review. Do not substitute grades without approval. |
Plate thickness | List web, flange, end plate and stiffener thicknesses separately. A BOM may list 8, 12, 16 or 20 mm plates; these are input examples, not a capacity range or design recommendation. |
Welding | Gas-shielded arc welding, submerged arc welding or shielded metal arc welding as appropriate to the joint and approved WPS. |
Acceptance basis | Specify welding code and edition, weld sizes, penetration, tolerances and inspection plan. AWS D1.1/D1.1M may be requested subject to agreement. |
Check member orientation, overall geometry, diagonals, interface elevations and bolt-hole locations. Weld inspection covers the required sizes and appearance; UT, MT or other NDT is selected for suitable joints under the agreed inspection plan. Where required, mating subassemblies are checked together before coating. A code reference does not mean every weld receives the same test.
Specify surface preparation, paint system, dry-film thickness and color. Galvanizing is a separate option requiring review of dimensions, drainage and venting. Agreed records can include material certificates, dimensional and weld reports, coating records and a packing list linked to assembly marks. Protect protruding interfaces and identify the erection orientation for shipment.
Drawings and scope review → assembly split and detailing → written drawing approval → material preparation and fit-up → welding and dimensional inspection → agreed coating → marking, packing and shipment.
Send ZSJH your location, building grid and loads, drawings/BOM, assembly boundaries, grades and plate thicknesses, quantities, weld/NDT requirements, finish and delivery schedule. Structural design, calculations and BIM detailing are available when drawings are incomplete.