Intumescent fireproof coating for indoor steel structure(thin type)(Fig. 1)

Fire resistance test using GB / T706-2016 36 b hot-rolled I-beam as a substrate, The specimen is simply supported on the test furnace horizontally, the calculated span of the steel beam is 4200 mm, the length of the fire section is 4000 mm, the weight of the standard cover plate used is q = 562.2 N / m, the uniform load simulated by four points concentrated load is applied, and the total external load is 208 kN.

the steel structure of the fire retardant coating fire resistance test piece of the coating structure followed by anti-rust primer, fire retardant coating, the measured coating thickness of the total thickness of the components before the experiment.

Condition of members before fire resistance test (Fig. 2)