Material acceptance:
Check the fireproof board inspection report
Confirm that the thickness deviation of the plate is ≤0.5mm
Check the flatness of edges (measured with a 2m straightedge, the gap should be ≤2mm)
Base layer treatment:
The moisture content of the concrete base layer should be less than 8%
The surface of the steel structure needs to be derusted to Grade Sa2.5
The spacing between embedded parts is ≤600mm
II. Construction Process Flow
Line snapping and positioning:
Use a laser level to set out
The width of the layout seam should be controlled at 3-5mm
The internal and external corners need to be strengthened
Sheet cutting:
Use a dedicated cutting machine (with a rotational speed of ≥4000r/min)
Notch chamfered at 45° (width ≥ 2mm)
Use a step drill bit for drilling
Installation and fixation:
The steel structure utilizes M6 galvanized bolts (with a spacing of ≤300mm)
Use chemical anchor bolts for the concrete base layer
Fill the slab joints with fire-resistant sealant (with an expansion coefficient of ≥150%)
III. Key control points
Seam treatment:
Horizontal joints must be installed with staggered joints (staggered joint distance ≥300mm)
Special connectors are used for vertical joints
The seam needs to be filled with fireproof cotton
Node processing:
Apply circular fireproof sealing around the through-wall pipeline
Install a fireproof back plate on the back of the electrical box
The corner is designed with an L-shaped overall wrap angle
IV. Quality acceptance standards
Flatness: Checked with a 2m guiding rule, it is ≤3mm/2m
Joint height difference: ≤1.5mm
Fireproof sealing: continuous, complete, and opaque
Anchoring strength: Pull-out force ≥ 1.5kN
V. Safety precautions
Work at heights:
Use safety ropes that comply with GB6095
The spacing between scaffold poles is ≤1.8m
Cross-operation is prohibited
Fire prevention measures:
MF/ABC4 fire extinguishers are equipped at the construction site
Designate special personnel to monitor the cutting area
Waste materials should be promptly removed and transported
Occupational health:
Wear an N95 dust mask
Wear goggles during cutting operations
Continuous operation should not exceed 2 hours
VI. Handling of Common Problems
Plate cracking:
Check the deformation amount of the base layer (≤L/500)
Re-check the reserved width of expansion joints
Replace flexible connectors
Joint leakage:
Re-apply sealant
Install waterproof sealing strips
Apply interface treatment agent
Hollowing issue:
Adopt injection-type perfusion repair
The area of a single hollow spot is no more than 100cm²
Anchor point densification
VII. Maintenance Requirements
Routine inspection:
Check the sealing condition of the joints every month
Conduct quarterly inspections on the status of anchoring components
Annual fire performance testing
Cleaning standards:
Use a neutral detergent with a pH value of 6-8
It is forbidden to use steel wool for wiping
Washing water pressure ≤ 0.3 MPa