ACI 318-19 §25.4.2

Rebar Development Length Example

Step-by-step rebar tension development length calculation per ACI 318-19 §25.4.2. Determines cb, Ktr, modification factors ψt/ψe/ψs, and required ld for a #8 bar in normalweight concrete.

Given Parameters

bar diameter
rebar yield strength
concrete strength
ψt = 1.0, ψe = 1.0
to bar surface
between parallel bars

Calculation Steps

1. Determine cb and Ktr

2. Modification Factors

3. Development Length

4. Minimum Check

Required Development Length

Run this calculation in AXIS

The interactive calculator checks every step automatically, allowing you to configure parameters and view live structural drawings.

Open Calculator →