Unistrut International 16100 S. Lathrop Ave. Harvey, IL 60426 Phone: 708-339-1610 800-882-5543 Fax: 708-339-7814 www.unistrut.com MEMORANDUM Date: January 19, 2006 Subject: UNISTRUT & MSS SP-58, SP-69 & SP-89 From: Unistrut Engineering Unistrut actively participates on MSS Committee 403, which is responsible for Standard Practices SP-58, SP-69 & SP-89. In general, Unistrut products conform to the requirements of MSS SP-58, SP-69 & SP-89 where applicable to the objectives of these standards. Unistrut channel, threaded rod, pipe clamps and beam clamps conform to SP-58, SP-69 & SP-89. By definition, MSS considers continuous concrete inserts (e.g. P3200 Series) devices to which hanger assemblies attach. Therefore, MSS does not have requirements for concrete inserts. However, the material from which Unistrut concrete inserts are made do conform to MSS SP-58, SP-69 & SP-89.