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48-Meter Heavy-Duty Steel Factory: Built for Cranes, Built for Business
2026-10-18 22:07:15
48-Meter Heavy-Duty Steel Factory: Built for Cranes, Built for Business
Pre-engineered steel structure factories combine long spans, fast erection and crane-readiness. Below is data from an actual double-bay heavy industrial workshop drawing.
Building Overview
表格
| Item | Value |
|---|---|
| Structure type | Portal frame steel structure |
| Number of bays | 2 bays |
| Total span | ~48,100 mm (24 m + 24.1 m) |
| Column height | ~10,000 mm |
| Crane span | 22.5 m and 24.29 m |
| Material | Q355B |
| Column type | Welded H-section (WH) |
| Beam type | Tapered welded H-section |
Column Sections
| Column | Section | Type |
|---|---|---|
| GZ1 | WH1000×400×14×25 | Heavy end column |
| GZ2 | WH900×400×14×25 | Interior column |
| GZ3 | Upper WH400×300, Lower WH1000×300 | Step column |
| GZ4 | Upper WH400×300, Lower WH1000×300 | Step column |
| GZ5, GZ6 | WH500×350×8×16 | Light column |
Beam Sections
| Beam | Section | Type |
|---|---|---|
| GL1 | WH600×350×8×20 | Tie beam |
| GL2 | WH(1300→700)×350×12×18 | Tapered rafter |
| GL3 | WH700×350×10×16 | Intermediate beam |
| GL4 | WH(700→1000)×350×10×16 | Tapered beam |
| GL5 | WH(700→1300)×350×12×18 | Roof rafter |
| GL6 | WH(1700→1000)×350×14×25 | Main rafter |
| GL7 | WH1000×350×12×22 | Crane beam support |
| GL8 | WH(1700→700)×350×14×22 | Main rafter |
| GL9 | WH(1000→1700)×350×14×25 | Main rafter |
Advantages
- Huge clear span — 48 m total span with no interior columns, full floor use
- Crane-ready — step columns designed for overhead cranes (22.5 m span)
- Fast construction — shop-fabricated, bolted erection, 3–6 month build time
- Light weight — steel structure weighs 1/3 to 1/2 of equivalent concrete
- Expandable — easy to add bays or extend length later
Disadvantages / Limitations
- Fire protection needed — steel loses strength at high temperature, needs fire coating
- Corrosion maintenance — needs repainting every 10–15 years
- Vibration sensitivity — steel frames vibrate more than concrete under crane load
- Initial cost higher — steel price fluctuation affects budget
- Design complexity — tapered columns and cranes need experienced engineering
Typical Applications
- Heavy machinery factories — overhead crane for machine installation
- Steel fabrication shops — crane for lifting steel beams and columns
- Automobile plants — large bays for assembly lines
- Warehouse & distribution centers — high clearance for racking
- Aircraft hangars — huge clear span for aircraft maintenance
Fabrication & Construction Notes
- All columns and beams shop-welded (WH = welded H section)
- Field connections bolted, no site welding on main members
- Crane beam brackets shop-welded to columns
- Bracing system installed for longitudinal stability
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