... 2 reliable quality steel, Detailed Product Description Function: C shape purlin, Z shape purlin, H shape beam are widely used in factory buildings, high ... buildings, large-span bridges, gymnasiums, and portable houses. Size of C shape purlins: 1) No. 1 model: A) Size: 80 x 40 ... 20 B) Thickness: 2. 0 - 3. 0mm C) Coil width: 396mm Size of Z shape purlins: 1) No. 1 model: A) Size ...