TABLE 46. 



UNIT STRESSES FOR STRUCTURAL TIMBER EXPRESSED IN 

 POUNDS PER SQUARE INCH. 



Recommended by the Committee on Wooden Bridges and Trestles, American Railway 

 Engineering Association, 1909. 



These unit stresses are for a green condition of the timber and are to be used without increasing the live- 

 load stresses for impact. 



SMITHSONIAN TABLES. 



* Partially air-dry. 



t L= length in inches. D = least side in inches. 



