... price 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 ... x 20 B) Thickness: 2. 0 - 3. 0mm C) Coil width: 389mm steel, C Purlin / Z Purlin / H Beam, Steel Structure, Steel Work