![]() The theoretical lap splice lengths using different standards were calculated and experimentally investigated in this study. Where bars of different sizes are lap spliced in compression, l sc is the longer l dc of the larger bar calculated in accordance with 25.4.9.1, and l sc of the smaller bar is calculated in accordance with 25.5.5.1 as appropriate. All tested beams had mid-span GFRP reinforcement tension lap splices using straight- and hooked-end bars. 80000 psi, l sc is the longer of (0.0009f y – 24)d b and l stcalculated in accordance with 25.5.2.1.įor f ' c < 3000 psi, the length of the lap is automatically increased by one-third.Ĭompression lap splices are not used for bars larger than No. Contact lap splices are widely used for the construction of reinforced concrete structures. Maximum percent of A s spliced within required lap length Tension lap splice length l st for deformed bars and deformed wires in tension is controlled with Table 25.5.2.1.Ī s,provided/A s,required over length of splice Lap splice lengths of deformed bars and deformed wires in tension Transverse reinforcement is provided such that K tr is not smaller than 0.5d b, for bars with fy≥80000 psi, according to 25.5.1.5. for noncontact splices, according to 25.5.1.3. The transverse center-to-center spacing of spliced bars does not exceed the lesser of 1/5 the required lap splice length and 6 in. Minimum Spacing of Reinforcement per ACI 318-19 with ideCAD Minimum clear spacing between the contact lap splice and adjacent splices or bars is controlled according to 25.2.1. Lap splices couldn’t be done for rebars larger than No. K tr = transverse reinforcement index, in.ĭ b = nominal diameter of bar, wire, or prestressing strand, inį' c = specified comprehensive strength of concrete, psiį y = specified yield strength of nonprestressed reinforcement, psi L sc = compression lap splice length, in. This type of splicing is done using a lap splice to join two pieces of rebar overlap to form a continuous reinforcement. L dc = development length in compression of deformed bars and deformed wire, in. L d = development length in tension of deformed bar, deformed wire, plain and deformed welded wire reinforcement, or pretensioned strand, in. Compression lap splice length l sc is controlled automatically according to 25.5.5.Ī s = area of nonprestressed longitudinal tension reinforcement, in.2
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