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Calculator is for use in U.S. applications only. For Canada switch to Canada TJI Joist Allowable Holes Calculator.

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Use ForteWEB™ to determine solutions for conditions beyond the scope of this table.


Use the drop downs below to select your TJI joist, hole type, and hole size. The output will show the required minimum distance from end and intermediate or cantilever supports.

TJI Joist allowable holes diagram