Help with screw tightening

Submitted by blzmwt t3_z5he8v in DIY

I'm putting up shelving in my garage. I've purchased some brackets and 4 inch screws and washers.

I did a shelf on one side of the garage which faces the exterior of the house without an issue. Used my stud finder and used my impact driver.

When I went to do the same on another wall that faces the interior of the house, I again found the studs with the stud finder and measured everything out.

When I began to drill, the screws would not tighten. They certainly latched onto something because I can't pull them out by hand. This happened to both studs on this same wall. When I pull the bracket from the wall, the screws can come out approx 1/2 an inch from the wall.

Any help would be appreciated.

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Comments

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Alicia-XTC t1_ixw1wnp wrote

It's possible you hit the edge of the stud and/or split it.

Try using a finishing nail to find the exact center?

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im-here-to-argue t1_ixwaq4i wrote

How does one use a finishing nail to find the center? Just nail it in every 1/8” or so until they find the edges?

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88leo t1_ixw6ju1 wrote

post pictures

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Bldaz t1_ixwri41 wrote

You used a stud finder so you are on the wood guessing you didn’t predrill and studs split. It doesn’t take much to split fir.

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ChiefInspector69 t1_ixxizfp wrote

Possibly an electrical wire, plumbing pipe or protection plate.

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Rob636 t1_ixxlir0 wrote

Any chance you have 1x2 wood strapping behind the drywall, and not full studs?

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SaintXDevil t1_ixyn1zo wrote

Do you screws have part of the shank with no threads? It's possible you haven't hit the studs and it's sliding up to the threads

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