Steel Purlin including roof purlin and wall girt which used support the roof and wall panel , Purlin in C and Z section , cold galvanizing coated , purlin is the secondary structure and pass the load from roof to steel frame .
C section steel : C section steel cold formed by steel roller sheet , light weight and high strength , steel materials Q195-345 which widely used as wall girt and roof purlin .
Z section steel : Z section steel light weight , high strength and save the quantity of steel ,easily and convenience for erection , Z section steel widely used as roof purlin for steel structure building
Sag rod fixed on wall girt and roof purlin , which enlarge the stability of purlin , sag rod fabricated by steel rod , diameter : 12mm .
Wall and roof panel fixed on steel purlin by self-tapping nail .