ZSJH
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1 Product overview
ZSJH supplies H-Shaped Steel Columns for Factory Buildings to approved project drawings. The column transfers roof reactions and specified equipment or crane actions through the frame to the foundation. Rolled or welded H sections can be supplied with base plates, beam connection plates, brackets and stiffeners as designed. The focus is coordinated column-base and roof-beam interfaces for workshops, industrial warehouses and crane-equipped factory bays.
2 Building geometry and column specification
Item | Specification |
Eave height | 6 m reference height; customized to drawings. Member length and internal clear height are checked separately. |
Longitudinal column spacing | 6 / 9 / 12 / 18 m reference options; spacing is selected through structural design. |
Building span | 20 m and above as a reference enquiry requirement; span alone does not determine column capacity. |
Layout example | 60 m length × 24 m width, 24 m single span, 6 m eave height and ten 6 m longitudinal bays. Illustrative layout only. |
Column section | Specify overall depth h, flange width b, web thickness tw, flange thickness tf, member length and orientation. |
Material | Q235B or Q355B options; other specified grades subject to review and availability. Grades are not automatically interchangeable. |
Plate thickness | For built-up sections, list web, flange, base plate and stiffener thickness separately. Values such as 8 / 12 / 16 / 20 mm illustrate BOM entries, not a uniform supply range or design recommendation. |
3 Section options and applications
Item | Specification |
Rolled H section | Review available section dimensions, grade and designed attachment details. |
Welded H section | Specify flange/web plates, constant or varying section geometry where designed, and longitudinal welds. |
Column with crane bracket | Coordinate bracket elevation, rail/support interfaces, stiffeners and specified crane actions. |
Segmented column | Use approved splice positions and details where handling, shipping or erection requires segmentation. |
4 Column base and roof beam interfaces
The base plate must match the column footprint and the approved foundation anchor layout. Specify plate size and thickness, anchor-hole diameter and pitch, edge distances, stiffeners, welds and any required bearing-face preparation. Hole clearances and slots follow the engineered connection. At the column head, confirm beam-connection elevations, plate orientation, bolt-hole patterns and roof-bracing interfaces. Coordinate bracket and splice positions with the same drawing datums to avoid incompatible interfaces.
5 Loads and layout coordination
Width measured on the column axes equals one span or the sum of multiple spans; building length follows the longitudinal grid and bay count. Eave height is not necessarily column member length or usable clear height. Column selection must account for the applicable axial forces, bending, restraint conditions and stability requirements. For crane-equipped buildings, provide the designer’s crane actions, including wheel reactions and horizontal effects where applicable; lifting capacity alone is insufficient.
6 Welding and acceptance requirements
For built-up columns, submerged arc welding may be selected for suitable long flange-to-web seams; gas-shielded arc welding or shielded metal arc welding may be used for appropriate attachment joints. The approved Welding Procedure Specification (WPS) defines the process, consumables, joint preparation and applicable preheat/interpass controls. Agree the welding code and edition before fabrication. AWS D1.1/D1.1M may be specified for structural steel work subject to review and agreement. Drawings define weld sizes, required penetration and any fatigue-related details; naming a process does not establish weld acceptance.
7 Surface protection and inspection
Item | Specification |
Surface treatment | Specify blast-cleaning grade, coating products, per-coat/total dry-film thickness, color and repair system. Where required, Sa 2½ visual preparation can be specified against ISO 8501-1. |
Galvanizing option | Review dimensions, vent/drain details and distortion considerations. ISO 1461 can be specified for coating requirements and testing; galvanizing is confirmed separately. |
Dimensional inspection | Check member length, section geometry, straightness, twist, base-plate orientation, connection elevations and hole positions against agreed tolerances. |
Weld inspection | Visual checks plus UT, MT or other suitable NDT where specified. Agree method, extent, acceptance criteria and access before production. ISO 17637 may be specified for visual testing. |
Handover records | Agreed material certificates, dimensional/weld records, finish records, approved drawings and packing list linked to column marks. |
8 Manufacturing and delivery
Project drawings and requirements → engineer review of loads and interfaces → design/calculations/BIM detailing where requested → customer written approval of fabrication drawings → material preparation, cutting and hole-making → fit-up and applicable welding → agreed inspection and finish → column marking, packing and shipment. Protect base plates, beam connections and brackets during handling. Column segmentation requires approved splice details. Columns are the supply object; roof beams, crane equipment, anchor hardware and erection are included only where expressly listed in the quotation.
9 Buyer questions and enquiry
Can one column section serve all spacing options?
Each option changes the frame tributary loading and requires design review.
Does a 6 m eave height mean a 6 m column?
Member length depends on base and head geometry and the approved elevations.
Can ZSJH help without complete drawings?
Structural design, calculations and BIM detailing are available.
10 CTA
Send ZSJH your location, drawings/BOM, building grid and loads, column sections and thicknesses, anchor layout, brackets/splices, quantities, welding/inspection,