"Joe J" wrote in message
...
I'm attaching 2 x 4s to the studs in a finished garage. Finished with
1/2" drywall. Are 3" screws long enough, I have a bunch leftover from a
different project? The 2 x 4s will be holding 5/8 plywood for shelves.
Or, should I just bite the bullet and go with 3 1/2?

Thanks

I'd use them. I'd also put a dab of construction adhesive in four or five
spots too on the ones hanging the shelves. .