Hollow Structural Sections (HSS)

ASTM A500, Grade C is the standard specification used in North America and is readily available from North American HSS producers as well as steel service centers.

ASTM A1085 HSS are higher performing and well suited for applications that demand more, such as seismic or bridge applications.

Applications include:

• Buildings
• Manufacturing and industrial facilities
• Bridges
• Towers and cranes
• Sign supports and poles
• Off-shore production and drilling platforms
• Roll-over protective structures (ROPS)
• Falling object protective structures (FOPS)
• Amusement rides
• Manufacturing facilities

ASTM A500 Resources:

• ASTM A500 Section Properties – Square HSS
• ASTM A500 Section Properties – Rectangular HSS
• ASTM A500 Section Properties – Round HSS
• Capability Chart – Rounds
• Capability Chart – Squares and Rectangles

ASTM A1085 Resources:

• ASTM A1085 Capability Chart – Rounds
• ASTM A1085 Capability Chart – Squares and Rectangles

Class C HSS are cold-formed and welded similar to ASTM A500 HSS.

Class H HSS are also cold-formed and welded, but then heat-treated in a furnace to stress relieve the product. Class H can be designed to a higher axial capacity in accordance with CSA S16, which may lead to weight savings in column applications.

Resources:

CSA G40 Imperial Section Properties

• Rectangles
• Squares
• Rounds

CSA G40 Metric Section Properties

• Rectangles
• Squares
• Rounds

Class H Fact Sheet