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Size of perforation / size of webbing?

The minimum perforation size needs to be at least twice the material thickness. So, 3/8” on 3/16” material. There is no max perforation size, except where code dictates – e.g. 4” sphere rule for guardrails. The webbing or material between perforations also needs to be twice the material thickness or greater for strength and to reduce deflection on the panel face.

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