In article ,
Karl Townsend wrote:

When the horrible heat breaks, I need to put a new wood deck on my old
truck. I found the steel frame on the dump bed to be really rusted and
replaced most of the cross members with a heavier channel iron than
original.

What fastener is best to put 2 x 12s on to a steel frame. I looked for
self tapping screws and didn't find anything rated to do the four inch
channel iron. Maybe I need to look more.

Suggestions?

Karl


Carriage Bolts, hot galvanized. If you are looking for self-tapping
screws you obviously don't want to do as much work as carriage bolts
will involve, but they do the job quite well.

For something you can install/remove from the topside only, I think I
have seen large flatheads used on some trailer decks. Probably these:

http://www.mcmaster.com/#tapping-screws/=i9w201

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