Cold-Formed Rectangular Hollow Sections - 300x100x12.5

Cold-formed rectangular hollow sections (RHS) are flat-sided, box-shaped steel tubes made by bending flat steel sheets into shape at room temperature and welding the seam. This cold-shaping process triggers "work hardening," which increases the steel's yield strength and makes the finished tube highly resistant to bending. Their flat, straight faces make them much easier to join, bolt, or weld to other flat structural parts compared to round pipes. Thanks to this practical shape and high strength-to-weight ratio, they are a favorite choice for construction frames, machinery scaffolding, and architectural steelwork.

Individual CAD files can be downloaded as either DWG files or compressed in a ZIP folder

Dimensions

PropertyValue
D mm300
B mm100
t mm12.5
kg/m68.3
A cm287

Full sortable table: Dimensions table for this category

Section Properties

PropertyValue
d/t(1)19
b/t(1)3
cm48010
cm41370
cm9.59
cm3.97
cm3534
cm3275
cm3732
cm3330
J cm44290
C cm3521
m20.736
m210.8

Full sortable table: Properties table for this category