Construction Method for Explosion-Proof Wall

1. Installation and fixation of the keel

(1) Flatten uneven ground, roof, and wall surfaces where dragonframe installation is required.

(2) Mark the locations of the joists on the ground and roof according to the design, and indicate the positions of doors, windows, and pipe openings.

(3) Secure the studs using chemical bolts (or at the pre-bolted welding points), ensuring the spacing between the chemical bolts (welding pre-bolted points) is ≤1200mm.

(4) Explosion-proof wall method one: the spacing between horizontal and vertical ribbed steel is 1200*1200mm, the ribbed steel is welded back-to-back, and the thermal insulation type is filled with rock wool insulation board, with the thickness in accordance with the rib standard.

Fireproof wall method two: The spacing of the horizontal and vertical steel keel grooves is 407*407, the keels can be directly affixed, and for insulation type, rock wool insulation boards should be filled according to the keel specifications.

When cutting the joists, pay attention to keep the vertical joist opening directions consistent and do not invert the top and bottom to ensure that the holes in the vertical joists are on the same horizontal plane.

(5) Use a plumb bob to correct the vertical alignment of the upright joists.

(6) Install reinforcing rods at the ends of door and window frames, wall junctions, and both sides of larger openings.

(7) Position additional support objects at the location of the suspended equipment for secure fixation.

(8) Install concealed piping and outlets, as well as internal fillings (such as rock wool according to design requirements). If holes need to be drilled in the vertical studs, the diameter of the holes must not exceed half the width of the studs.

(9) Inspect the size and verticality of the rib frame, as well as its integrity and stability; installation of the explosion-proof panel can only proceed upon passing the inspection.

2. Installation and fixation of explosion-proof plates

(1) Based on design drawings and actual construction conditions, cut and drill the panels. Field chamfering is performed as necessary. The two long sides of the explosion-proof panels have been chamfered. However, when the wall height exceeds 2400mm, the short sides of the horizontal joints of the explosion-proof panels must be chamfered on-site for better joint treatment.

(2) Draw lines on the explosion-proof panel and mark the points for self-tapping screw fixation, while pre-drilling concave holes (1mm to 2mm larger in diameter than the head of the self-tapping screw). Self-tapping screw spacing is 150-300mm, (for back-to-back edge joists, double rows of self-tapping screws are required for fixation).

(3) During installation, it is generally recommended to lay the boards vertically, with the long edges fixed to the vertical studs; when joining the boards, they should be naturally brought close together without forced alignment; the joints on both sides of the wall should be staggered, not aligned on the same stud.

(4) When securing the explosion-proof panel, pre-drill holes should be made at the panel and joists. The explosion-proof panel should be fastened with self-tapping screws, and it should be secured from the center of the panel towards the edges. All screw heads should be countersunk into the panel and pass through the joists.