Splicing Reinforcing Bar

Splices (17.5mb, Flash Video)
See how spliced rebar is installed.

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 bars: lap splices, mechanical splices, and welded splices. Lap splices are the most common. Lap splices are typically used for smaller-diameter method (#11 or smaller) reinforcing bars.

When there is not enough space for a lap splice, mechanical or welded splices are used. #14 and #18 sized reinforcing bars cannot be lap spliced.

Three methods of splicing reinforcing bar:

Must-Have Resources

Reinforcing Bars: Anchorages and Splices (Purchase Publication)
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.
Field Inspection of Rebar (Purchase Publication, myCRSI)
CRSI's Field Inpection Guide (available in pocket edition or on CD-ROM) includes material inspection, installed reinforcing bar tolerances, visual inspection of installed rebar and more.