USEFUL DATA 



Modifications in Elongation for Thin and Thick Material. For bars less than 

 ^-inch and more than %-inch nominal diameter or thickness, the following modifi- 

 cations shall be made in the requirements for elongation: 



(a) — For each increase of 3^-inch in diameter or thickness above ^-inch, a deduc- 

 tion of 1 shall be made from the specified percentage of elongation. 



(6) — For each decrease of ^-inch in diameter or thickness below ^^-inch, a deduc- 

 tion of 1 shall be made from the specified percentage of elongation. 



Finish. Material must be free from injurious seams, flaws or cracks, and have a 

 workmanlike finish. 



Variation in Weight. Bars for reinforcement are subject to rejection if the 

 actual weight of any lot varies more than 5 per cent over or under the theoretical 

 weight of that lot. 



Note: — The chemical and physical properties are given for three different grades of steel. In 

 using the specification care should be taken to indicate clearly the grade desired. 



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