LOADS IN STRUCTURES 



surface; therefore, in the majority of cases, a live load of 

 100 Ib. is ample. The conservative rule is, in general, to 

 assume loads not less than those just given, and to propor- 

 tion the beams so as to avoid excessive deflection. Stiffness 

 is as important a factor as strength. 



ALLOWABLE LIVE LOADS ON FLOORS IN DIFFERENT 

 CITIES 



NOTE. In the table the values given for roofs are for snow and 

 wind loads. In the last column, the roof loads marked with the aste- 

 risk (*) do not include the wind load; the building laws of Boston 

 require that a proper allowance for the wind load exerting a pressure 

 of SO Ib. per sq. It. of vertical surface shall be made in designing roofs- 



