. The strength of materials; a text-book for engineers and architects. ^-N X y-^. Y —D ---^ ^ 5-Y ^^^^ -* P ^ I v^-^ ^^ i> o o a — o o o o o o s. Fig. 134.—Columns with Open Webs. braced struts such as shown in Fig. 134 are commonly usedbut the diagonal bracing should preferably have one rivet * See Illinois University Bulletin, No. 44, G. Talbot and Moore, foran experimental investigation of the subject. 290 THE STRENGTH OF MATERIALS passing through the two diagonal bows as in the top of instead of two rivets as shown. The unbraced lengthof one of the beams or channels must be such
. The strength of materials; a text-book for engineers and architects. ^-N X y-^. Y —D ---^ ^ 5-Y ^^^^ -* P ^ I v^-^ ^^ i> o o a — o o o o o o s. Fig. 134.—Columns with Open Webs. braced struts such as shown in Fig. 134 are commonly usedbut the diagonal bracing should preferably have one rivet * See Illinois University Bulletin, No. 44, G. Talbot and Moore, foran experimental investigation of the subject. 290 THE STRENGTH OF MATERIALS passing through the two diagonal bows as in the top of instead of two rivets as shown. The unbraced lengthof one of the beams or channels must be such that the loadper sq. in. on them is not more than the safe stress for themconsidered as struts. We can get an idea of the maximumunbraced length as follows— Let c = buckling factor of whole strut ,, ki = least radius of gyration of one channel or beam ,, P = total load carried b}^ strut ,, 2 A = total area of strut ,, S = maximum unbraced length of channel or beam. Then, using Eulers Formula, ^^-v- =^ = ^ Each channel or beam carries ^ load stress 5S2 ~ S2B _ B yfci^ • • C2 ~ S^ . •. S = k-^c r. Equivalent length of strut L yjT Sin
Size: 978px × 2553px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkdvannostran
