412 



STRUCTURAL DRAFTING. 



CHAP. XII. 





Xs f if f// 



/ Clearance "b should 'be ab feast 4 and 2 iF possible- 



Clearance "c" should be ab least, %" 

 Clearance (t d" should be jjl'plus ' for each additional 

 neb plate when more than two are in chord- 

 Clearance "e" 

 must be large 

 enough to per- 

 mit access to inside For 

 riveting- 



At "X"cut Flanges 



square as shown by Full line and not bevel- 

 ed 35 shown by dotted tine 



s 



u 



h 





Clearance "F" should be 3 when 

 possible but specifications may call For $ . ^ - ^3. 



* 



Clearance "d M should never be less 



&** 



4+ 



f 





- 



b f 



Clearance "g "should be about % 9 



never less Clearance "k" should never be less thanl' f . 



FIG. 21. CLEARANCE STANDARDS. AMERICAN BRIDGE COMPANY. 



