Rectangular Hollow Section

RHS

Rectangular hollow sections or rec tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel. In order to form the rectangular steel section the appropriate mother tube, a round steel tube, has to be formed first. From a round tube rolls are used that progressively press the round tube into a rectangular hollow section. This is all done inline.

A Type Of Strong Thin Wooden Board

Plywood

Now when you choose new furniture, you may know plywood is a great choice for furniture, but what is it actually? Most people may simply say it is one type of wood only. Here is wikipedia explain: Plywood is a material manufactured from thin layers or “plies” of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another.