Quote:
Originally Posted by MBAtarga
I'd recommend the use of a carriage bolt so that the domed head of the hardware won't stand too far proud of the wood decking.
Or, my suggested method (similar to yours) is to first drill a recess into the decking (preferably with a forstner bit if you have a set) which closely matches the bolt head size but drill a depth of slightly less than the bolt head height, then second, drill the whole for the bolt shank diameter all the way through the decking and the trailer floor.
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Was going to suggest carriage bolts but they still rest on the top of the wood rather than really countersinking in. If you pull them too far in you end up with a spot for water and dirt to stand. I found the trick I used when I did some decking on an old semi trailer I use as a dock. Works great.
Good call on the forstner bit but a lot of guys don't own a set of those... I do.