◆Economical Span Of Bridge◆
Centre to centre distance between two successive bridge support is called span. However economical span of bridge is associated with keeping the cost of bridge as minimum as possiblea long with satisfying all safety criteria.
●Economic span is the one in which cost of one pier is equal to ½ the cost of two span which it supports.
●The total cost of the bridge consists of the cost of the substructure and that of the superstructure.
●Very often it is seen that the cost of the substructure forms nearly 50 per cent of the total cost of the bridge.
cost of substructure equals to cost of super structure gives economic span
ReplyDelete