Common Structural Design Mistake in Residential Projects: Ignoring Capacity Checks in Notched Beams
✅True or ❌False
"Notched beams do not need to be checked for loss of capacity."
⁉️ The answer is below the video when you scroll down.
Watch this video first before you scroll down to visualise a notched timber beam.
"Notched beams do not need to be checked for loss of capacity." ❌ False
Notched beams still need to be checked for loss of capacity, because introducing a notch changes the beam’s geometry and can create stress concentrations at the transition, and lead to different governing sections along the member.
Which code and clause will need to be looked into when you have a notch in a timber beam? AS1720.1, Appendix E (Clause E9).
Next time you’re working on a timber beam with a notch, don’t assume it’s fine.
Check its capacity using the clause above.
That check can control the design.
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