The provincial fire department said on Thursday that it carried out a comprehensive fire check after the tragedy and found Steel Frame Modular House have been used as makeshift buildings in hospitals, schools, kindergartens and community centers.

The blaze, which broke out at 7:30 a.m. and swept through the entire complex within an hour, left 38 of the 51 occupants dead and six injured.Privately-owned Kangleyuan nursing home in Lushan County, Henan, which caught fire, consisted of a row of bungalows all made of the light steel structure.

The Fire department found the steel panels of the modular structures have heat insulating materials inside, making them flammable. The easily-built houses have been widely used as indoor markets and activity rooms.Local people said the dorms were of "bad quality", which were "built with iron sheets and without foundations".