[QUOTE=Patriot76;291563]

Originally Posted by
Proton
Removing plywood floor from the trailer frame, first set the depth of the blade on the saw then made several cuts, using a zip cut at an angle to remove the heads from the screws.
Could also have used the welder to burn the heads off, this is what I use when scrapping out an aluminium highway tractor cab that has steel braces in the corners with steel rivets securing them in place. Cheap rod at high amperage.
You can do the same thing using a coat hanger instead of a welding rod. They are cheaper and my welder does not care. In this case the cut off blade would have been my choice. Depending on the age of the wood a wonder bar and hammer can take the wood off and you can cut the screw level with the deck on one pass. It would be hard to do with the pry bar shown in the picture.
I haven't tried burning the heads off with a welder but i've had really good luck with a cutoff wheel on the grinder. Had a 3000 sq/ft cedar wraparound deck where the decking boards had to be replaced a few years ago. They originally used 16D box nails going into pressure treated framing below. No hope of ever pulling the nails, but just cutting the heads off made it easy to get the decking boards up.
You can save a little bit of money by using metal cutting skill saw blades that have worn down to 4" diameter in the angle grinder.
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