Hollow structural section (HSS) is a type of metal profile with a hollow tubular cross section, including Square Pipes and Rectangular Pipes. Hollow Sections are commonly used in welded steel frames where members experience loading in multiple directions.

Standard

ASTM A500, EN10219, EN10296 and etc.

Grade

A25, A25P, GR.A, GR.B, GR.C, Q195, Q235, Q355, C250, C350 and etc.

Application

Piling Pipe, Structural Pipe, Galvanized Pipe, Torque Tube, and etc.

Source:- https://www.uniasen.com/hollowsection/

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