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Holes created within the web of joists are a necessity to allow the passing of services and notching and drilling shall be carried out within the recognised limits. The flange of I-joist not be notched or drilled under any circumstance.
Hole dimensions not exceeding 20mm do not need to be to the centre of the web.
Minimum 2x hole dimension spacing between holes.
Holes larger than 20mm are required to be placed centrally within the web.
Holes required to be at least the distance of the joist depth away from the end or mid-support.
Larger holes passing through the web close to the supporting wall require additional support, Steico approval and reinforcement detail required.
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