Profile: Ratna Steeltech specializes in providing Pre-Engineered Buildings, Prefabricated Structure, Industrial Shed, Warehouse Shed & Color Coated Roofing Sheet. Rectangular hollow sections (RHS) is a mechanical, structural and construction applications. This is due to the flat surface resulting in a structural solution that is more economical for joining and various other types of fabrication works. Due to the rectangular shape of this type of hollow section, when joining to other flat surfaces sections only need to be straight cut. RHS requires minimal edge preparation for welding or joining. RHS can also be used for architectural aesthetics due to possessing clean lines alongside structural strength.