ACI & SNIP Rebar Anchorage Length

Rebar anchorage length is the length of rebar required to transfer the design load from the rebar to the surrounding concrete. The required anchorage length depends on various factors such as the bar size, concrete strength, reinforcing bar yield strength, and the design load. Here is how to calculate the rebar anchorage length for ACI and SNIP codes:

ACI (American Concrete Institute) Code:

The anchorage length requirement for deformed bars in ACI code is given by:

Ld = (2 * db * Fy) / (0.87 * f'c^(0.5))

Where Ld is the development length in inches, db is the diameter of the rebar, Fy is the specified yield strength of the rebar, and f'c is the specified compressive strength of the concrete.

SNIP (System of Norms and Standards in Construction) Code:

The anchorage length requirement for deformed bars in SNIP code is given by:

Ld = k * db * (Fyd / Fcd)^(1/3) * (f'c / 10)^(-1/6) * δ^(1/2)

Where Ld is the development length in mm, db is the diameter of the rebar, Fyd is the yield strength of the rebar, Fcd is the compressive strength of the concrete, f'c is the design compressive strength of concrete in MPa, δ is the reinforcement ratio, and k is a coefficient that depends on the rebar diameter and the type of concrete cover.

It is important to note that the rebar anchorage length calculation may vary depending on the specific design requirements and local building codes. It is always recommended to consult the latest version of the applicable building code and seek the advice of a licensed structural engineer or designer for any specific project requirements.