Mechanical rebar splices for rebars in concrete construction is an effective method of joining reinforcing bars. These are designed based on codes of standard practice.

Mechanical splices in reinforced-concrete construction should meet the building code requirements for developing tension and compression as required

Types of Mechanical Splices for Rebars

There are four major types of mechanical splices:

#1 Compression only mechanical splices or end bearing splices

#2 Tension and compression mechanical splices

#3 Mechanical lap splices or tension only mechanical splice

#4 Dowel bar mechanical splices

Compression-Only Mechanical Splices or End Bearing Splices

As it may be noticed from its name, this type of splice can resist compression stress merely. The compressive stress is transferred by vertical bearing from one bar to another one.

Compression only mechanical splices can be used when tension stress does not occur. Therefore, if this condition cannot be guaranteed, then it is advised to avoid the use of compression-only mechanical splices for reinforcement bars.

Steel filled coupling sleeve and strap type steel coupling sleeve are the two most commonly used examples of end bearing splices.

It should be known that the end of the rebars needs to be saw cut in the case of strap type steel coupling sleeve, but no special end preparation is needed for steel filled coupling sleeve.