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UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1259 
Washington, D. C. 
October 9, 1924 
STANDARD SPECIFICATIONS FOR 
STEEL HIGHWAY BRIDGES 
Adopted by the 
AMERICAN ASSOCIATION OF STATE HIGHWAY OFFICIALS 
And approved by the 
SECRETARY OF AGRICULTURE 
FOR USE IN CONNECTION WITH FEDERAL-AID ROAD WORK 
CONTENTS Page 
Division I — Materials , 1 
Structural, Rivet, and Eyebar Steel 1 
Eyebars 2 
Steel Forgings 3 
Wrought Iron 3. 
Steel Castings 3 
Gray-Iron Castings 4 
Malleable Castbgs 4 
Phosphor-Bronze 4 
Division II — General Construction 4 
Steel Structures 4 
Painting Steel Structures ' 15 
Division III — Design 18 
General Features 18 
Loads 20 
Unit Stresses 25 
Distribution of Loads 26 
Structural Steel Design 27 
Index 46 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1924 
