(1)Standards: DIN975; ASTM A193; DIY (2)Material:low carton steel,stainless steel (3)Surface:Natural color, Zinc, HDG Spiral steel tie rod adopts advance cold rolled technology manufacturing, which improves its tensile strength.Spiral steel tie rod assembly has highly tensile strength, and high-precision process can make the formwork error margin within 2mm, thus pour concrete wall thickness is ...