Material requirements for seismic support

(1) The entire support and hanger system should meet the requirements of impact load resistance and fire resistance rating, ensuring safety in the event of a fire under special loads, and ensuring a certain fire resistance rating (not less than 180 minutes) in the event of a fire.

(2) The C-shaped steel used for seismic support should be Q235B and above strength steel, and it is required to be cold pressed channel steel; The side of the channel steel should have axial stiffeners to enhance the section stiffness and bending resistance; It should be able to provide inspection reports on channel steel material issued by testing institutions, test reports on front compressive bearing capacity of channel steel, test reports on side compressive bearing capacity, and test reports on back tensile bearing capacity.

(3) The C-shaped channel steel of the seismic support and hanger must have teeth on the inner edge, and the depth of the teeth should not be less than 0.9 mm; The installation of all accessories relies on mechanical engagement, and any installation method that uses the friction of the accessories to bear the force is strictly prohibited to ensure the reliable connection of the entire system.

(4) The seismic support and hanger should be corrosion-resistant, and the surface of the channel steel should be hot-dip galvanized (the thickness of the zinc layer should not be less than 55 μ m) To meet the durability of seismic support and hanger. The on-site cutting of the finished channel steel should ensure that the cut section is vertical. After cutting, the burrs on the cut should be removed using sandpaper or a board file, and then the coating on the cut should be repaired. The hot-dip galvanized finished channel steel should be supplemented with zinc spray cans, and the thickness of the repaired coating should not be less than the thickness of the original coating.