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LETTERS

Coastal Contractor

September 2008
Oversized bolt holes; contractor reward program

First 100 Words:
LETTERS Oversized Bolt Holes a Problem? In Mark Clement's article ("Time-Saving Guardrails") in the July issue, my eyes locked on to the size of the hole compared with the bolt. He oversizes the bolt holes by 1/4 inch (3/4-inch hole for 1/2-inch bolts). I used to oversize holes for bolts by 1/8 inch to 1/4 inch until the deck-ledger testing conducted at Virginia Tech was published in the March 2004 issue of your sister publication, JLC (jlconline.com). In the study, they oversized holes for 1/2-inch through-bolts by 1/16 inch to 9/16 inch and noted the importance of not oversizing holes.

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