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# Rebar Lapping Length

KurtHeckman.Rebar Lapping Length

The **Rebar Lapping Length** calculator computes the length overlap needed at rebar joints based on the size of the rebar (**rS**) and the lapping factor (**LF**).

**INSTRUCTIONS -** Enter the following:

- (
**rS**) The size of rebar which is used to compute the diameter for lapping considerations. - (
**LF**) The lapping factor is the multiple of the diameter of the rebar to specify the lapping distance. 40 (default) and 60 are common.

**Lapping Length:** The calculator returns the length of rebar lap in inches. However, this can be automatically converted into other length units (e.g. centimeters) via the pull-down menu.

#### Rebar Calculators:

* BNT-40 Automatic Rebar Tier*

- Compute the
**Weight of Rabar**in a slab - Compute the
**Surface Area**of a slab - Compute the
**Surface Area of Concrete Forms** - Compute the
**Volume of Concrete**in a slab - Compute the
**Weight of Concrete**in a slab or wall

### Lapping

When the dimensions of your slab or wall exceed the length of a single piece of rebar, it is required to lap the rebar and tie the bars them to create the added length. There are a few considerations. First, the length of the lap is often specified as 40 times the diameter of the rebar. In this case, 40 is lapping factor. 60 is also a common factor, but the engineering specifications should always be applied. See these YouTube videos to better understand rebar lap:

Second, the typical length of rebar is 40' and 60' in the United States.

See how much the rebar will weigh - Rebar Weight

**Rebar Lapping Length**, is used in 1 calculator.

**Calculators**