... Panel & Cladding material Guangdong Qiguang Group Co .,Ltd is specialized in producing the prefabricated house and steel structural project and we ... million.We also manufacture PU sandwich panel, steel roofing tile,EPS panel, H-beam,Z-beam,steel column, girder and purlin ... height, roof pitch, etc .2.Doors and windows: dimension, quantity,where to put them.3.Local climate: wind speed, snow load, etc ...