291 



beam, and putting a straight edge across the graduations 

 corresponding to the depth and the load, we read off on the 

 other scale the proper breadth of the beam. 



Z5 



20 



15- 



I0\ 



5 



4- 



3 



kj 



5 

 ki 



k 



o 



5: 

 k 



Q> 

 ki 



<0 



ki 



<o 

 CO 



<^> 



3 



-J 



300 



zoo 



-I DO 



—OREGON 



-~0 



4 PIN < M * R «PtN INSIG 



10 



ZU* 



-/o 



\—PIN. CAN. 

 EUC. OBL 



-y 



14 



k 

 k 

 kl 



k 



<o 



k 



k 



o 

 <o 



-J 

 iO 



10 



*PM. 





15 



15- 



10 



15 

 <0 



/oo 



3- 



<0REG0N 



4 



k 



k 



The load to be carried should be multiplied by the 

 appropriate factor of safety. 



The computer is designed for the case of uniformly 

 distributed loads, but it is applicable to a single concentrated 

 k2 



