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Reference from "Steel Reinforcing Bar Specifications in Old Structures"

Reference from "Steel Reinforcing Bar Specifications in Old Structures"

Reference from "Steel Reinforcing Bar Specifications in Old Structures"

(OP)
The paper "Steel Reinforcing Bar Specifications in Old Structures" (link: http://www.concrete.org/PUBS/JOURNALS/AbstractDeta...) refers to a recommendation by the Department of Commerce for standard rebar sizes - does anyone know what this recommendation was (title, etc)? I assume it was generated by the Building Code Committee.

Brian C Potter
http://simplesupports.wordpress.com

RE: Reference from "Steel Reinforcing Bar Specifications in Old Structures"

United States Department of Commerce.
Simplified Practice Recommendation No. 26.
Steel Reinforcing Bars.
Issued by the Bureau of Standards. Original Draft, September 9, 1924.
Washington: Gov't Printing Office, 1925.

Essentially, it provided a table with cross-sectional areas for each round and square nominal size (... 3/8" round, 1/2" round, 1/2" square, 5/8" round, 5/8" square... etc). The producers ended up only conforming to the cross-sectional area, since many still produced proprietary shapes. Bars didn't really get standardized until ~1947 when ASTM A15 and A308 began to evolve and combine.

For more info see the attached from "Standards and Specifications for Metals and Metal Products - Miscellaneous Publication No. 120", by US Dept of Commerce/George Wardlaw:

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