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HSS
Hollow Structural Sections (HSS) are manufactured hollow steel sections, typically of circular, rectangular, or square cross-section, although other shapes such as elliptical are now available from various producers. In North American, HSS sections conform to the ASTM Specification A500 and Canadian Specification CAN/CSA-G40.20-04/G40.21-04. The use of HSS is growing with popularity all around the world in the building industry. While less than 15% of the U.S. structural steel market, in Europe and Japan HSS members account for approximately 30% of the market. Popular uses include architecturally exposed structural steel, staggered truss and conventional truss structures, and basic column or vertical bracing elements.
Questions often arise when designing, fabricating, or specifying HSS. This is YOUR resource and one-stop-shop for the use of HSS in the building industry. If the answer isn't here, please contact our AISC Steel Solutions Center at 1-866-ASK-AISC or solutions@aisc.org and you will get in touch with someone who can assist you, today!
HSS Producers
AISC HSS Committee
Frequently Asked Questions from the Steel Solutions Center Regarding HSS
Design Competition
Modern Steel Construction Articles on the use of HSS
Structural Systems & Case Studies that use HSS as an integral part of the structural steel system
Published Research on HSS in Engineering Journal
Steel Interchange (from MSC) that addresses HSS
Design Guides for HSS applications as published by CIDECT 
Links to other HSS resources
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