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Name: Steel Building Frame Welding Service
Brand: ZSJH

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Steel Building Frame Welding Service

Made-to-drawing roof beams supplied with coordinated end connections and member identification. ZSJH reviews project drawings, coordinates fabrication details and supplies components to the approved scope. Roof beams are coordinated with the column grid, roof slope, support points and bracing. The product is the fabricated beam, with rolled or welded built-up sections as specified.

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ZSJH


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Product Description

1 Welding scope before production

ZSJH provides Steel Building Frame Welding Service for industrial frames, factory extensions and warehouse structures. Shop welding covers approved beam-column joints, stiffeners and frame subassemblies. The quotation defines who supplies the material, whether fit-up is included and whether delivery covers welded members or a complete assembly. Joint preparation and inspection handoff are agreed before work begins.

2 Weld specification checklist

Item	Specification
Base metal	Grade and material identification, such as project-specified Q235B/Q355B; identify dissimilar grades separately.
Thickness	List member and attachment thicknesses per joint. 8 / 12 / 16 / 20 mm entries are enquiry examples, not a qualified welding range.
Joint geometry	Butt/fillet connection, groove angle, root gap, backing, access and weld position.
Weld detail	Size, effective length, required penetration, joint reference and approved drawing revision.
Inspection	Method, extent, acceptance criteria, hold points and required records.
Post-weld scope	Cleaning, repairs, dimensional correction and separately specified coating or heat treatment.

3 Match the process to the joint

Item	Specification
Submerged arc welding	Consider for suitable accessible long seams in built-up members.
Gas-shielded arc welding	Consider for suitable connection plates, stiffeners and frame joints.
Shielded metal arc welding	Consider where the joint, position and approved procedure make it suitable.

4 WPS and qualification requirements

Specify the applicable welding code and edition; AWS D1.1/D1.1M may be requested subject to project agreement. The approved WPS governs preparation, consumables, process and applicable preheat/interpass control. Required procedure and personnel qualifications must match the scope. Do not infer complete penetration from the welding method alone or extend a procedure to unqualified materials and thicknesses.

5 Fit-up and distortion control

Before welding, check material identity, groove condition, root gap, attachment positions and assembly datums. Agree sequencing, restraint and intermediate dimensional checks for the member geometry. For a building enquiry, 6 m eave height, 6 / 9 / 12 / 18 m grid and spans of 20 m or more may describe the project, but they do not establish joint sizes or a welding qualification. Assembly dimensions and lifting requirements are supplied separately.

6 Inspection handoff

Visual examination covers the specified weld dimensions and appearance. Where required, UT, MT or other NDT is selected for suitable joints under the project plan. ISO 17637 may be specified for visual testing. Identify hold points, inspection access and repair/reinspection requirements before coating. The agreed record package may include material certificates, WPS/qualification information, weld inspection reports and dimensional checks.

7 Welding workflow

Scope and joint review → approved drawings/WPS and inspection plan → preparation and fit-up → welding with sequence control → weld and dimensional inspection → approved repairs and reinspection if needed → agreed post-weld work and handover.

8 Enquiry

Send ZSJH drawings, material/thickness, joint and weld details, quantity, assembly dimensions, code, inspection, post-weld scope and delivery requirements. If details are incomplete, ZSJH can provide structural design, calculations and BIM detailing.