The maximum size and location of allowable holes is based on product type and depth.
Depending on their location in the span, holes up to 2" may be allowed in Microllam® LVL, Parallam® PSL and 1.3E TimberStrand® LSL, and holes up to 4 5/8" may be allowed in 1.55E TimberStrand® LSL. See page 26 in TJ-9000 for additional info on allowable hole size, placement and limitations.
Contact Weyerhaeuser Technical Support for holes that are beyond the limitations of the charts.
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