Rebar Development Length

Last updated June 19, 2023
By Ian Story

2,500 psi concrete

	#3	#4	#5	#6	#8	#10
Tension, straight	10.8	14.4	18	21.6	36	45
Tension, straight (top bar)	14	18.7	23.4	28.1	46.8	58.5
Tension, hooked	9	12	15	18	24	30
Tension, hooked (2.5″ cover)	6.3	8.4	10.5	12.6	16.8	21
Tension, hooked (confined)	7.2	9.6	12	14.4	19.2	24
Tension, hooked (confined + 2.5″ cover)	6	6.7	8.4	10.1	13.4	16.8
Tension, lap splice (B)	14	18.7	23.4	28.1	46.8	58.5
Tension, lap splice (B, top bar)	18.3	24.3	30.4	36.5	60.8	76.1
Compression, straight	9	12	15	18	24	30
Compression, straight (confined)	6.8	9	11.3	13.5	18	22.5
Compression, lap splice	12	15	18.8	22.5	30	37.5