Rebar Splicing Specifications

Save

The Building Code for the American Concrete Institute (ACI) lists rebar splicing specifications that must be followed or the rebar structure will not pass inspection. While there are many factors that determine the kind of splice to be used, mechanical or lap, builders need to be aware that splicing on a project can be specified so that it exceeds the ACI regulations by the Engineer of Record.

Lap

  • A lap splice is when two pieces of rebar are tied together where the bars overlap. The length of the overlap is calculated by using the equation 30 times the bar diameter. A minimum of four sets of ties are then evenly spaced along the lap length. Bar numbers 14 and 18 (1.6 and 2.3 inches diameter), bars in tensural tie, joint and flexural locations, such as those found in bridges and some column designs, cannot be lap spliced according to the Building Code of the American Concrete Institute (ACI 318: 12.14.2.1; 12.15.5 and 23.3.2.3).

Mechanical

  • Mechanical splices use metal channel devices to connect two pieces of rebar. Typically, the rebar must have threaded ends to fit into the mechanical splice and then the splice is tightened onto the bar. Lentons and couplers are common names used to refer to mechanical splices. This splice is used for bars too large for lap splicing or, in situations in which the splice may have to be undone at some later point, such as when connecting a column to a setting rig.

Transitional

  • Transitional splicing is used to change from one bar size to another. With a mechanical splice, each threaded end will be a different size and with lap splicing, the splice is determined by calculating 30 times the diameter of the larger bar. Transitional splicing is most commonly found in column structures that narrow as they rise.

General Notes

  • Rebar splicing specifications, although regulated by the Building Code of the American Concrete Institute (ACI 318), are site specific and determined by the Engineer of Record on the project. Splicing specifications will never be less than what is required by the ACI, but may call for a longer length or specific mechanical splice device. The specifications for splicing rebar will be listed in the General Notes section of the Structural Drawings issued for each project and stamped by the Engineer of Record and Building Inspector to indicate their approval.

References

  • Photo Credit Photos.com/Photos.com/Getty Images
Promoted By Zergnet

Comments

Resources

You May Also Like

  • How to Rebar Columns

    Concrete resists forces that tend to compress it, but it needs steel reinforcing bar, commonly called rebar, to help with tensile forces,...

  • How to Replace a House Foundation Sill Plate

    Is the sill plate on your wood frame house rotten or damaged? Keep in mind that replacing a sill plate on your...

  • How to Join Two Concrete Slabs

    Many large slabs are split into several separate pours on different days. Sometimes, if the next section is scheduled in a different...

  • How to Calculate Rebar Needed in a Concrete Foundation

    Calculating rebar for a foundation project is as important as calculating concrete for the footings. If you guess at the amounts, you...

  • How to Calculate Rebar Lengths

    Rebar, short for reinforcing bar, is a steel bar used to reinforce concrete and masonry structures. When dry and compressed, concrete may...

  • How to Start Rebar in the Foundation for a Block Wall

    Building a concrete block wall, whether for a foundation or a retaining wall, begins with the placement of a concrete footing that...

  • Rebar Installation

    Rebar is used to strengthen concrete slabs and structures. The rebar allows the concrete to bend and flex without cracking and breaking....

  • How to Overlap Rebar

    Rebar is a common component found in concrete slabs. It serves as a foundation or paving where there is a need of...

  • How to Become a Rebar Inspector

    Rebar inspectors are responsible for making sure rebars, or reinforced steel bars, are properly installed in construction projects. They are required to...

  • How to Use Rusted Rebar

    Unless the rust on the rebar is significant enough to cause it to drop below ASTM specification, you can use it for...

  • Rebar Requirements in Concrete Wall Construction

    Concrete strength is enhanced with the addition of steel, combining to form reinforced concrete. Rebar is sized and placed according to the...

  • ACI Reinforcement Steel Lap Requirements

    Concrete is a building material that yields great compressive strength but has little or no tensile strength. Construction practices always mandate the...

  • Specifications for a Grade 60 Rebar

    Rebar is a widely used material in the construction industry. Most of the concrete used in the construction of buildings and bridges...

  • Can You Weld Rebar Together?

    Rebar is a common trade name for steel reinforcing bar. The product is used to add strength and other qualities to poured...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!