Highway bridges and culverts . hich reinforced concrete slabs maybe built within the limits of practicability and safety depends muchupon the loads to be carried. The depth and amount of fill over theculvert, which may distribute the effect of the concentrated load, isalso an important factor. On main roads, where concentrated loads, such as road rollers ortraction engines, are to be provided for and the depth of fill over theculvert is sufficient only to provide a cushion of earth from 1 to 2feet in depth, the concrete slab is practical for spans up to about 10or 12 feet, while for greater sp
Highway bridges and culverts . hich reinforced concrete slabs maybe built within the limits of practicability and safety depends muchupon the loads to be carried. The depth and amount of fill over theculvert, which may distribute the effect of the concentrated load, isalso an important factor. On main roads, where concentrated loads, such as road rollers ortraction engines, are to be provided for and the depth of fill over theculvert is sufficient only to provide a cushion of earth from 1 to 2feet in depth, the concrete slab is practical for spans up to about 10or 12 feet, while for greater spans than this, under these conditions,other types better adapted to the longer spans should be will be discussed further on (cf. pp. 14-16). Under conditions of less severe loading the spans for the slab maybe increased up to 16 or possibly 20 feet, but it does not seem advis-able to use them for these greater spans in view of the possibilitiesof a nominal future growth of traffic requirements. __„_ Road Jurface-i.
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Keywords: ., bookauthorhoytchar, bookcentury1900, bookdecade1910, bookyear1912
