Our Galvanized Iron Z and C Purlin gives extra rooftop support, making a flat diaphragm that supports the heaviness of the deck and rooftop. It runs parallel to the structure eave and is upheld by walls or rafters. This adds inflexibility to the rooftop and mid-length backing to permit longer ranges for an extensive structure. It is created from cold-framed steel and can reach over 30 feet or more long. The size and number required relies upon the structure measurements, the essential surrounding framework, how the structure will be utilized and the building plan. Stiffeners can be added in this Galvanized Iron Z and C Purlin to anticipate distortional clasping or sidelong relocation if necessary.