Tag: Crackling Sound of Steel Raised Floor

After installing steel cementitious raised floor, some customers will feedback that when people start to walk on them, sometimes noise problem(crackling sound) happen. Why crackling sound happen This situation only occurs on steel cementitious raised floor with bare finish, and it is mainly concentrated on raised floor with concentrated load less than 350KG. Steel cementitious raised floor is composed of two layers of steel plate and cement. When the cement is dry, if there is pressure on raised floor, the cement will break, this is the source of broken sounds. In our experiments, when there is only cement without steel, the cement breaks when the limit deflection reaches 0.8mm. But even when the deflection reaches 5.0mm (the deflection of the CISCA test standard is 2.5mm), whole steel cementitious raised floor will not break. Raised floor with concentrated load less than 350KG is light-grade level. When there is pressure on this