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Re: bumpers for interior perimeter
The cutout as described by the OP is an unsupported section of the BUMPER. Thus it is limited to 8".
I can see the disconnect between the written rule and the picture, and why my post might be misunderstood. I believe the GDC considers a bumper with 1/4" or less gap to be a supported bumper, not unsupported.
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(since 2004)
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