# Lapping length of reinforcement steel bars

Normally, steel bars have a 6m length. If length of a bar is not enough to keep the reinforcement, we have to lap two steel bars. Normally, lapping position is at where near the minimum shear force is acting. Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. When lapping two bars of different diameters, the lap length is considered as 50 times the smaller diameter.

if bar 12 m if beam is more then 15 m where lop given

Provided alternative laping

Wat is the minimum lap length for beam. Pls and me.

600mm minimum lap length

how u find 50 times

it also depend on fy of steel and fcu of concrete from anchorage chart

kamalakannan…. 50D . it is relative.

….any effect of concrete gread

What is the minimum percentage for overlaps, chairs, speacer bars to give while preparation of sub contractor bill?

Suppose the contractor work done 50 M.T

Then, what we taken for overlap, wastage & chairs percentage?

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it is preferred that the lap is at minimum bending moment.

If the Rebar case is 37 metre and Standard Reba size beacome 12metre.Then what is the lapping length.plz tell tnx

general guide for positioning of lapping is first 1/3 of the span of beam/slab.

best to study shear and beam diagram to identify suitable position of lapping