If you have room for a second or a third screw, just add more. I know this is basic but I am a newbie to DIY :) Please Help :) I am trying to hang a book shelf on my wall. Withdrawal loads : If the forces will apply pressure that wants to pull the boards straight apart, called withdrawal pressure, be sure that ample screw threads are inserted into the receiving board. Then predrill the hole with a 1/8-in. Use a stud finder to locate the wall studs, and mark their position on the trim piece. I have found the studs in the wall (drywall) but I am not sure what kind of screws would be best to attach the L Bracket to the wall. The easiest way to increase the amount of weight a screw in a stud can hold is to simply double up. Game plan. attaching it to 4 studs, 2 screws in each stud. Set the drill clutch “light” so that the screw doesn’t strip out. Drywall screws have become the standard fastener for securing full or partial sheets of drywall to wall studs or ceiling joists. Screws used to attach 1/2-inch drywall to wood framing should be long enough to go into the wood at least 5/8 inch. Kitchen wall cabinets screwed to wall studs is one example of lateral or sheer pressure. Two screws can hold 160-200 pounds. Three screws can hold 240-300 pounds. Use screws made specifically for attaching drywall to wood. These screws have large, coarse threads that give them a lot of gripping power in the wood. I've read a few guides which specify different nails (3.75*75 and 4.5*100 - I don't have a brad) and also 3 by 2 or 4 by 2 studs. Drywall screws' lengths and gauges, thread types, heads, points, and composition at first might seem incomprehensible. bit. attach a 2x4(92inches long) to my wall horizontally. I'm building a non structural stud wall. The MOST important part is to screw into the center of a stud. It would be best to have an assorted collection of theses screws since you may never know when you’d need them. Drywall Screw Sizes The drywall screws come in sizes such as 1 inch, 1-1/4 inch, 1-5/8 inch, 2 inch, 2-1/2 inch and 3 inches. When you find a stud, you’ll hear a beeping noise and will know that it’s safe to drill there. Similar to pegboard but with far greater holding power, a French cleat wall adds heavy-duty storage to a garage, workshop, or kitchen. [amazon box=”B07F6RZM43,B000IKK0OI,B01HTFHOEI” grid=”3″] Simply place your stud finder flat on the wall and slowly move it along the wall left or right. Learn how here. You will want to choose a screw that's at least 1 1/4 inches long. A screw in a stud can hold between 80 and 100 pounds. (skipping 2 studs in the middle that have electric nearby) To avoid splitting the trim, countersink the screwhead with a 1/4-in. What size and/or type of screw should i use in a wall stud? bit. Be sure to distribute the weight across as many as you can. These are small, handheld devices that can be run along the wall to quickly locate a stud. 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