Timber Design Calculator

Design timber beams, columns, and joists per Eurocode 5, NDS, and AS 1720. Calculate bending, shear, bearing, and deflection with load duration and moisture modification factors.

Eurocode 5 · NDS · AS 1720

Design Parameters

Standard

Timber Grade

Moisture / Service Class

Load Duration Class

Section & Span

Width (mm)

Depth (mm)

Span (mm)

Support Condition

Load Type

Loading

Ultimate UDL (kN/m)

Service UDL (kN/m)

Design Results

FAIL

Bending Stress

18.75 MPa

Allowable Bending

9.85 MPa

Shear Stress

1.25 MPa

Allowable Shear

1.97 MPa

Deflection

13.18 mm

Deflection Limit

10.00 mm

Deflection Ratio

L/228

Deflection Check

FAIL

Bearing Stress

1.67 MPa

Bearing Length

100 mm

Utilization

Bending190.4%

Shear63.5%

Deflection131.8%