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what is the formula for lapping length. In case of column generally we take 24d 40d where d is dia of the bar. Lap Length in Tension For the lap length in tension the following formula can be used for calculating the lap length including the anchorage value of the hooks 1.
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2K views View 1 Upvoter. The lap splice as the name suggests is created by overlapping two lengths of rebar then wiring them together. Lap length depends upon the following.
As per IS Code 456-2000 overlapping length should not be less than 75mm.
Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. Example on calculation of lap length of 4X16mm bars of a column in a multi-storey building Since the bars are in compression a 1 a 2 a 3 a 5 10 As calculated above l bd 3705ϕ. Steel bar lapping in construction. Both anchorage and lap lengths are determined by the ultimate bond stress fbd which depends on the concrete strength and whether the anchorage or lap length is in a good or poor bond condition.
