strapping smooth shank screw?


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Old 01-18-15, 09:55 AM
Q
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strapping smooth shank screw?

I've been using 1.5" screws with thread all the way to the head.
I now need some 2 inch screws but the ones I have have a smooth shank at the top? Will these work or will they allow the strapping to move in future?
 
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Old 01-18-15, 10:39 AM
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As long as the biting part of the screw is into the final holding wood, the smooth shank actually helps pull all the wood together. You want your screw to be twice the length of the material you are attaching, so if you have one inch of material, you will need a 2" screw.
 
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Old 01-18-15, 10:56 AM
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The first screws you where using where the wrong screws, the 2" ones your using now are real wood screws.
Should also be predrilling the holes in the strapping with a built counter sink and tapered shaft on the drill.
A real wood screw has a tapered shaft, that's why a tapered drill is used so you maintain at least 75% contact with the screw.
Any Lowes or Home Depot has them.
Reason being the strapping is going to split if not predrilled.
It will also help prevent the strapping being pushed away as the screw goes into the joist.
 
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Old 01-18-15, 11:00 AM
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You could also use SPAX screws as they have a bit tip and burrs that will help with the predrilling process. You were using sheetrock screws, apparently, which were the wrong ones.
 
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Old 01-18-15, 04:15 PM
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Was using floor screws.
Seemed to work.
 
 

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