NOTES ON PLAT! -(, II; hi I; hi SIGN 



ART. 1. STRESS DISTRIBUTION AHD GEHERAL 



The theory of stress di-tnUni..n for plate girder* b the 



a* that for nolid beams of uniform material, it bring 



rally assumed that the common t h.ory of flexure applies 



\\itliMimYi.-nt accuracy to the built-up ; This asstinip- 



timi i-> .-. -rtainly imt -trictly true. The riveU connecting 



tin various parts together cause a local and small iirrgular- 



f stress (listrihutinii. -pliers of tin- various part #, and 



: ri-matic form, proliu-r <|iiite marked irregularity of this 



.Union. Tho "Theory of Kli'xurr " pro}* rly applinl 



to plati'-pinlcr design. 1; leads to a thoroughly good 



engineering structure, as an immense tonnage of such 



luring the paM forty yeaw and doing excel- 

 lent .hits it nesses. 



This \\idr UM- of the plat.- girder for srrvtc* ui. 



ing condition- \\IL* incn-o.-4-d tho knowledge of 

 its capacity an I -i\. n valuable practical information as 

 u design of certain of i res. 



The rtMjuireinents for ils fabrication, shipment and 



ion have also affected it< design. Then- nM|uin-menU 



are not fixed in their nature, although in certain rrspecU, 



