Identifier: BridgesAndCulvertsForHighwayTrafficFlatSlabAndGirderType (find matches)
Title: Bridges and culverts for highway traffic, flat slab and girder type ...
Year: 1908 (1900s)
Authors: Expanded Metal and Corrugated Bar Company
Subjects: concrete Division 03 bridges culverts
Publisher: Expanded Metal and Corrugated Bar Company
Contributing Library: Canadian Centre for Architecture

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90,000 808,000 1.36=. 1 S Mjtiare inch. corrugated rounds, 14 on centers. The spacing of the 1 idc walls should be a multiple of icing of the main reinforcing bars in the top slab, a« this facilitates theplacn in of the culvert direct!) belowf one-hall d on either side, baieid these Limits the stresses due to dead load de< 1USUall) being one and one-half to one. If desired the - tnent and thickm duced \S Of thl Cull 1 H Longitudinal reinforcement should be used in all culvert construc-tion. On account of unevenness in the supporting power of the earthand similar causes, box culverts often must act as beams spanning theseweak places. Wing walls with large footings and slabs to preventscour, when built monolithic with the culvert sometimes produce a bend-ing moment in the whole structure, owing to the uneven soil pressureoccurring under these conditions. Aprons—Box culverts should be provided with aprons to preventscour, and the wing walls should be figured as retaining walls. 95
Text Appearing After Image:
o>< < 1 1 1 1 1 1 1 1 11 i-t-t-j-^-t-t-t-t-f • 111111 • • i i.j. .i.i.i.i ■t-t-f-j-prr-i-f-J-j-t-i-i-i-f 1 , 1 1 t II 1 hU-H-t-t L_i J_u a J_L J Ji ■ 1- T T i :..+.. —i—,.-.•■ ,*—^—^i it Li- l (H GIRDER BRIDGES. The following detailed design will illustrate the application of the methods advocated to the design of a girder bridge: Problem—Design a girder bridge, resting on abutments; clear span32V ; earth fill 15 deep. Bridge to be 240 wide in the clear, withtwo 40 sidewalks and car track on center line. Class 2 loading. The cross section of the bridge will be as shown on Fig. 15.

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