# Question: How do you calculate Anchorage rebar length?

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## How is Anchorage length calculated?

Anchorage length is provided if sufficient development length cannot be provided inside the support/fixed end. L value is generally considered as 8 times the diameter for a 90 degree bend. While, 6 times the diameter for a 135 degree bend and 4 times the diameter of bar for a 180 degree bend.

## What is the formula for lapping length?

Normally, lapping position is at where near the minimum shear force is acting. Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. When lapping two bars of different diameters, the lap length is considered as 50 times the smaller diameter.

## What is Anchorage rebar?

Reinforced concrete [RC] is concrete in which reinforcement bars (“rebars”), reinforcement grids, plates or fibers are embedded to create bond and thus to strengthen the concrete in tension.

## What is the formula for splicing rebar?

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.

## What is Anchorage length of 135 degree bend?

Although the development length of the 135° hook was recommended to be extended to 8d, by the design guidelines based on ultimate strength concepts [3], 6d is the length still used in the normal practice.

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## What is anchorage failure?

Anchorage failure of hooked bar is considered as 3 types, that are side split, local compressive and raking-out failure. Among these failure types, raking-out failure tends to occur in case of lack of development length, which is focused in this study.