... , comfortable , useful 3 Long life & repeated us light steel structure House PERFORMANCE:1.Short construction period: steel and ... insulating and heat-insulating, average enter=0.0175 kilocalories / Meter. Hour. Degree, typhoon proofing grade is 12 grade,and ... circulating usage ,environmental proteciton and economization.standard villa 's light steelstructure is dependable and it is tight seal ,also ...