However, the contents of these “historical” SPs are now part of newly revised SP-58-2009. Credit lines should read 'Extracted from ANSI/MSS SP-55-2011. Hanger Spacing: (Extracted from ANSI/MSS-SP69, 2003,, Table 3, with permission of the publisher, the Manufacturers. SP-58 Pipe Hangers and Supports - Materials, Design and Manufacture.
