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Reinforced concrete structures are designed to behave monolithically. Properly designed splices of individual reinforcing bars are a key element in transmitting forces through the structure and creating a load path. The architect/engineer provides location, lap length, and related information on structural drawings.
There are three methods of splicing reinforcing bar: lap splices, mechanical splices, and welded splices. Lap splices are the most common. Lap splices are typically used for smaller-diameter method (#11 [#36] or smaller) reinforcing bars.
When there is not enough space for a lap splice, mechanical or welded splices are used. #14 [#43] and #18 [#57] sized reinforcing bars cannot be lap spliced.
Three methods of splicing reinforcing bar:
Splices (17.5mb, Flash Video)
See how spliced rebar is installed.
Reinforcing Bars: Anchorages and Splices is the definitive source for information on development and splicing of reinforcing bars. Includes extensive tables of development and lap splice lengths. Also includes expanded information on headed bars. Based on ACI 318-08 and AASHTO bridge specifications.
The purpose of this Technical Note is to offer an introduction to steel reinforcing bar splices and is intended primarily to readers with limited experience with this subject.