Originally Posted By: dvalley
This post was automatically imported from our archived forum.
1. Except for cutting to length, never cut, drill, or notch I-Joist flanges.
2. Holes may be located vertically anywhere in the web. Wherever possible, center holes in the web and always leave at least 1/8" of web at the top and bottom of the hole.
3. The sides of square holes shall not exceed three-fourths of the maximum round hole diameter permitted at that location. Do not over-cut the sides of square holes.
4. Where more than one hole is necessary, the distance between hole edges must be more than twice the diameter of the largest round hole or twice the size of the largest square hole. In addition, each hole must comply with the requirements of Table 3.
5. Do not cut any holes in the web within a distance of d/2 from the support centerline where d is the depth of the I-Joist, otherwise, a 1-1/2 inch hole can be cut in the web anywhere.
6. Exceptions will require that additional data be provided to the local building official.
NEVER drill, cut or notch the flange, or over-cut the web. Holes in webs should be cut with a sharp saw. For rectangular holes, avoid over-cutting the corners, as this can cause unnecessary stress concentrations. Slightly rounding the corners is recommended. Start the rectangular hole by drilling a 1"-diameter hole in each of the four corners and then make the cuts between the holes to minimize damage to the I-Joist.
Massachusetts Certified Home Inspections
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