ZSJH
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Commercial buildings may combine different floor grids, façade openings and service routes. Frame fabrication should follow the approved structural model and the agreed connection boundary. ZSJH supplies project-specific beams, columns, braces and plates with piece marks linked to floors and erection zones.
steel structure building systems
1. Floor-zoned piece marking. Every member is marked to a floor and erection zone for fast, error-free on-site erection.
2. Multi-storey grid coordination. Column sections, beam levels and splice locations are matched to the approved floor-by-floor model.
3. Façade and MEP openings. Embedded plates, brackets and openings around façades and service routes are detailed to approved interfaces.
4. Drawings-first fabrication. Produced to approved drawings and revision; structural design, calculations and detailing available on request.
5. Quality control and documentation. Weld details, tolerances and surface protection tracked and documented per project.
6. One-window export service. Packing, marking, shipping documents and delivery scope handled to your destination.
The following are typical options. Actual specifications are subject to approved drawings and project requirements.
| Item | Typical Range | Note |
|---|---|---|
| Component Types | H-section, box-section or built-up steel columns; floor beams; bracing; splice connections; connection plates; curtain wall embed plates and support brackets | Custom-fabricated as a coordinated package based on the structural model |
| Common Steel Grades | Q355B (GB/T 1591-2018); ASTM A36 / A572 Gr.50 / A992; EN S275 / S355 | Selected according to project design requirements |
| Plate Thickness | Typically 6–80 mm; heavy components fabricated according to drawings | Subject to approved drawings |
| Welding Standards | AWS D1.1 / ISO 3834 / GB 50661, as specified for the project | Traceable welder qualifications |
| Fabrication Tolerances | ISO 13920 or GB 50205-2020, as specified for the project | Subject to tolerances specified on the drawings |
| Surface Treatment | Blast cleaning to Sa 2½ (ISO 8501-1), followed by primer and topcoat; or hot-dip galvanizing (ISO 1461) | According to project corrosion-protection requirements |
| Individual Component Weight and Dimensions | Determined by fabrication, lifting and transportation limits, with sections divided by floor level | Split into erection segments as required |
| Inspection | Dimensional and weld inspection; nondestructive testing (UT/MT/RT) and third-party inspection as required | According to project specifications |
Typical applications include offices, retail buildings and mixed-use commercial frames. Fire protection, floors, façades and MEP are included only if expressly quoted. structural framing systems



Per project: mill test certificates (MTC); welding records and welder qualifications; dimensional/tolerance inspection records; coating records where specified; packing list with component marks and shipping documents.
ZSJH supplies fabricated structural steel members as loose or staged shipments matched to floor-by-floor erection, confirmed against approved drawings and quotation.

Members are marked by floor zone, protected and packed for sea or road transport; oversized members split and staged to match erection; export documents support destination customs clearance.
Question | Answer |
Do you fabricate only to drawings, or also provide design? | We fabricate to your drawings and can provide structural design, calculations and detailing, depending on how complete your drawings are. |
Can you mark members by floor and erection zone? | Yes — every member is marked to a floor and erection zone for fast on-site assembly. |
Do you handle façade and MEP openings? | Yes — embedded plates, brackets and openings around façades and service routes are detailed to approved interfaces. |
Can you export to our country? | Yes, as break-bulk or container cargo, with documents for destination customs clearance. |
What documents do you provide? | Mill test certificates, inspection records, packing lists and shipping documents; third-party inspection per project. |
What is not included in the steel frame? | Fire protection, floors, façades and MEP are included only if expressly quoted; we supply the structural steel package. |
Send ZSJH your project location, drawings or BOM, floor count and grid, column sections, floor beam levels, vertical loads, façade/MEP interfaces, splice locations, finish, quantities, inspection scope, delivery destination and target date. If drawings are incomplete, ask about structural design, calculations and detailing support.