Replacing bunks so how big of holes should i predrill for 3/8" hot dip galvanized lag screws? Thanks
Replacing bunks so how big of holes should i predrill for 3/8" hot dip galvanized lag screws? Thanks
The standard is 1/4” in hardwood, 15/64” in medium and 11/64” in softwood.
But I like a countersunk carriage bolt better. The wet and dry cycle with the bunks makes the lags work loose over time.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
Pressure treated pine.
Pine is a softwood.Originally Posted by Les Young
A Forsner bit makes a nice recessed place for a carriage head or stainless bolt head (if you can afford stainless).
Bill thanks, but I’m going with 1&1/4 “ x 3/8 “
galvanized lag screws from underneath like what’s in it. Been there for 17 years & still tight.
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