The transformation of steel strip into hollow structural sections (HSS) is the result of a series of operations including forming, welding and sizing. Currently three methods are being used in North America for the manufacture of HSS. These methods are described below. Each method meets IS-4923 , ASTM A-500 and CSA G-40.21-92 requirements for the the manufacture of HSS. They are excellent for making gates and grills. Extensively used in PERGOLAS and external cladding. Also known to replace wooden structures due to their Aesthetic appeal.
All hollow sections also known as RHS or Rectangular tubes are conforming to ISI (IS:4923) and have varied yield strengths between YST 240 to YST 360. The versatility of these sections allows for a wide range of applications as industrial sheds and exhibition stalls to space frames and sign supporting structures. The sections can also be utilized for large span portal frames, amusement parks and playground equipments, guard rails for staircases, sports galleries, pedestrian walkovers, bridges and bus stands amongst other uses.