How to fix the fire door after installation?

The installation sequence of steel fire doors: scribe-vertical door frame-install door leaf and accessories.

①Draw a line, and draw the position line of the door frame opening according to the size, elevation and direction required by the design.

②Erect door frame: first remove the fixed plate at the lower part of the door frame. If the height inside the frame is greater than 30mm than the height of the door leaf, grooves must be set on the ground on both sides of the opening. The door frame is generally embedded 20mm below the elevation of ±0.00, and the upper and lower dimensions of the frame must be the same. The allowable error is less than 1.5mm, and the diagonal allowable error is less than 2mm.

③Install the door leaf and accessories: Use 1:2 cement mortar or fine stone concrete with a strength of not less than 10MPa to plug the gaps around the door frame firmly. It should be integrated with the wall. After curing and solidification, paint the openings and walls. After painting, install the door leaf, hardware accessories and related fire protection devices. After the door leaf is closed, the seam of the door should be even and flat, opening freely and lightly. There must be no over-tightening, over-looseness and rebound phenomenon.