RIVKT SPACING I\ 



ii \v.BB 



than :i". It is U!M> cii.ftomary to \w two rows of .- 



-i 0" angle lag to the web. 



If the load Is applir.l .iirvctly to th. -ird.-r HAI>*< th, n 

 the previous computation needs mollification for th.- rivet 

 pit.-h iii th.- vertical i, -- ,,f th,. angles of the loaded flange*. 

 Ix t 1 i/. 56 rcproflcnt a i the top flangi* of the v 



of Fig. 5a ami a.ssuin< t hat it carries one-half a railway trark 

 on the top flange. Oiu- ii-iiM- wheel ui-i^hin^ 50,000 lbn. f 

 inrhnlinj; impact, will thru IH- carried in a npace of aliout 



Flo. 5. 





it In-ini: the custom to asssunif that thn-c t i. - carry 

 axle loai. I.-t II r and l" r of Fig. 5c represent the 

 resultant horizontal and vertical forces on th. riv.-t ax 

 applied to the rivrt l>y the ^inler weh: tin- n-sultaiit of 

 these two forces R should no? f the 



to safely resist either >h-ar or erii-hin^. To drti-r- 

 mine the pitch for t ! 



Let ir the wheel load including impact or oth-r 



it rat. -d load); 

 a -total flange area 



di -total flange area with the pan of \\cl> 

 for flange deducted . 



-threr liinrs the dataller c. to c. of ties ill II: 



A* effective depth of the girder in inches; 



