This range of âZâ shaped Galvanized Purlins is used as suitable structural supporting materials in construction industry (for temporary and permanent structures). Perfect for indoor and outdoor utilization purpose, these are made of standard grade steel and iron. Galvanized Purlins Offered galvanized items have 90 gsm to 120 gsm zinc coating thickness range. Featured with homogeneous surface, these items can be installed quickly. Accurate dimension, high strength, high precision level and specific diameter of punched holes are their key features. These are harsh weather proof.