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3. AISI-NAS. (2001). North American specification for the design of cold formed steel structural members. Washington, DC: American Iron and Steel Institute.
4. AISI-NAS-SUPP. (2004). Supplement 2004 to the North American specification for the design of cold-formed steel structural members. Washington, DC: American Iron and Steel Institute.
5. AS/NZS 4600. (2005). Cold-formed steel structures. Sydney & Wellington: Australian/New Zealand Standard.