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Old 12-08-2009, 10:37 PM   #1
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Screws for floor

Just wondering what people are using to fasten the plywood to the bus floor. I hear a lot about the "tek screws" Are they the flat philips head type? I picked up some lousy #6 self tapping screws from Lowe's. 500 count for $15.00. Needless to say they are too thin and I need to pre-drill every hole.

I saw a type of #10 self tapping screw that had some sort of "wings" at the bottom of the threads. Maybe to widen the hole in the wood so the screw does not bind up? Is that what everybody is using? Would I need to pre-drill the holes if I go with #10 screws?

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Old 12-09-2009, 12:53 AM   #2
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Re: Screws for floor

I used tek screws, but ended up pre drilling all the floor screws anyways. Just made it much easier and quicker. But I had two drills going at the same time, so I would pre drill on sheet of ply, then go behind and screw that sheet. Then I would move on to the next. Others here have been able to just drill them in, but on the thicker floor steel of my bus it just ate through my drills battery to do that.
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Old 12-09-2009, 09:58 PM   #3
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Re: Screws for floor

Ok. Thats what I thought. I will be heading back to Lowe's to swap them out!! Thanks!!
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Old 12-10-2009, 01:49 AM   #4
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Re: Screws for floor

I have furring strips under my plywood, but I used liquid nails to attach both those to the metal floor and the plywood to them. I used tek screws to hold everything in place while the glue set and recommend them for any application going into sheet metal, but the construction adhesive is doing the lion's share of the work and it keeps everything feeling really solid. I pre-drilled all my holes, but that was just to keep production times higher. I had a corded drill and one cordless. Making the cordless self drill all the holes would have run the battery down too quick and a single speed corded drill is a pain for driving screws.
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Old 12-11-2009, 08:55 PM   #5
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Re: Screws for floor

Here is some pictures of the different ones.
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File Type: jpg 005.JPG (547.9 KB, 306 views)
File Type: jpg tek screws.jpg (73.4 KB, 306 views)
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Old 12-12-2009, 12:37 PM   #6
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Re: Screws for floor

The top ones are self drilling and self tapping. I used ones similar to these for my subfloor. They sell them at Home Depot and Lowes in 2 lengths 1 5/16 and dont remember the other. Its been awhile but think they are coated like deck screws so they wont rust. They worked great, way faster and a whole less aggravating then predrilling.
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Old 12-12-2009, 12:45 PM   #7
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Re: Screws for floor

They are for wood to metal fastening. I believe the little ears widen the hole a little and then break off.
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Old 12-12-2009, 06:16 PM   #8
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Re: Screws for floor

Yeah, my buddy said he thinks the ears are for widening the hole in the wood so the screw does not bind up before it gets to the steel. I think I will go with them.
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Old 12-13-2009, 12:16 AM   #9
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Re: Screws for floor

Those ones with the ears are what I started with. They hold better than anything that I have tried, but I still had a really hard time getting them in without predrilling. I think my floor may be thicker than you guys that arent pre drilling. haha.
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Old 12-13-2009, 09:39 AM   #10
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Re: Screws for floor

Quote:
Originally Posted by bikeforthelight
but I still had a really hard time getting them in without predrilling.
As the great TIm the Tool Man Taylor says "it just needs more POWER!!"
I wonder if an air screw driver would work better than an electric one.
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