# Moment Capacity

## Example 03: Moment Capacity of a Timber Beam Reinforced with Steel and Aluminum Strips

**Problem**

Steel and aluminum plates are used to reinforced an 80 mm by 150 mm timber beam. The three materials are fastened firmly as shown so that there will be no relative movement between them.

Given the following material properties:

Allowable Bending Stress, F_{b}Steel = 120 MPa Aluminum = 80 MPa Wood = 10 MPa |
Modulus of Elasticity, ESteel = 200 GPa Aluminum = 70 GPa Wood = 10 GPa |

Find the safe resisting moment of the beam in kN·m.