Color Steel Plate & Purlin Replacement of Coal-Handling Conveyor Galleries and Counterweight Rooms, Power Plant
Power plant coal-handling system galleries & counterweight rooms | Color steel plate & purlin overall replacement
This project is located in the coal-handling system area of a power plant, systematically treating hazards such as rust, leakage and aged/failed purlins in the gallery and counterweight-room color-steel roofing and enclosure. The scope covers overall removal and reinstallation of gallery-top color-steel plates, counterweight-room enclosure replacement, rusted-purlin reinforcement or replacement, and waterproof reinforcement of roof nodes. High-altitude gallery work and crane-coordinated lifting set high requirements for construction organization, safety protection and schedule coordination; the whole work accommodated the generator set's no-production-stop condition, ensuring dual control of safety and quality.
Safety Measures
- Lifting control: crane work with special approval, warning zone, dedicated signaling, no one in lifting radius.
- High-altitude protection: gallery workers all wear dual-hook harnesses and retractable fall arresters, helmets and anti-slip shoes.
- No-production-stop coordination: close coordination with plant operations, avoid peak coal-handling hours.
- Hot-work control: cutting/welding away from combustibles, hot-work permits, fire equipment.
- Anti-fall measures: life lines and safety nets at gallery edges, materials fixed securely.
- Emergency plan: emergency team led by project manager, high-altitude rescue and anti-electric-shock equipment.
Construction Flow
- Site survey — measure gallery & counterweight-room roof damage range, purlin rust level.
- Preparation — crane in position, platforms erected, materials sorted.
- Old plate removal — remove old color-steel in sections, sort and clear promptly.
- Purlin replacement — remove/replace rusted purlins, align and fix new ones.
- New plate installation — lift and fix color-steel, standard longitudinal/transverse laps.
- Detailing — ridge, eaves, node sealing, waterproof finishing.
- Water-spray acceptance — overall water-spray test, no leakage, quality acceptance & handover.
- Site cleanup — remove platforms, clear waste, clean site.
Main Materials & Process Parameters
| Material / Process | Spec / Model | Application |
|---|---|---|
| Color-steel profiled sheet | 0.6 mm, galvanized + color-coated | Gallery & counterweight-room roof/enclosure overall replacement |
| C-section purlin | C160×60×20×2.5 | Rusted purlin replacement, roof support system |
| Self-tapping screw | M5.5×50 with sealing washer | Color-steel to purlin fixing |
| Waterproof washer | EPDM seal ring | Screw-through-plate waterproof sealing |
| Ridge / flashing | Same-color galvanized color-coated 0.6 mm | Ridge, eaves, corner node finishing |
| Weather-resistant sealant | Neutral silicone | Plate-lap & node waterproof sealing |
| Anti-rust paint | Epoxy zinc-rich primer | Steel-structure node anti-corrosion |
On-site Gallery
Project Highlights
- Special lifting plan; no accidents
- Galvanized color-coated overall replacement
- All rusted purlins replaced with C-section steel
- 50-day schedule met, no production stop
- Special waterproof sealing; no leakage hazards
- Overall water-spray test passed first time
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