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  • Drilling into

    I have been trying to drive 1/4 masonry screws into cinder blocks in my garage.

    I am using the hammer drill and a drill bit.

    When I screw them into the left side(same concrete I think), the screws go in and stay in.

    However, I am trying to hang shelves on the right side but the screws just pulled right out by hand.

    Where am I going wrong?

    Thanks
    http://www.cgiconnection.com/download

  • #2
    Re: Drilling into

    Thanks Jim,

    Yep, using Tapcons.

    I will give the metal anchors a pounding into the cinder block

    Thanks,


    Anthony
    http://www.cgiconnection.com/download

    Comment


    • #3
      Re: Drilling into

      Id guess that the cinder blocks are hollow not solid.
      One bolt is in the web at the centre of the block (or either end) and one is in the hollow section.

      Comment


      • #4
        Re: Drilling into

        Tapcons not being appropriate for concrete block is rubbish. They are just fine and their holding strengh is far superior to just about any other fastener when installed properly. If you are using 1/4" taps make sure you are using a 3/16" drill bit and don't wallow out the hole buy forcing the drill around. Since blocks are hollow in some sections make sure you the pick a screw size that is just long enough to engage the thickness of the block face. Using too long a screw will cause the threads to go right past into the hollow voids.

        Comment


        • #5
          Re: Drilling into

          Picture of toggle bolt. They also work well in plaster and/or drywall walls.

          Hint with Tapcon screws: Use only their masonry bits as most regular masonry bits drill oversize holes. If you carefully measure the carbide tips you'll understand this better.
          Attached Files
          Last edited by Woussko; 07-22-2008, 08:51 AM.

          Comment


          • #6
            Re: Drilling into

            try this i use them all the time
            http://www.confast.com/products/conc...ve-anchor.aspx
            Charlie

            My seek the peek fundraiser page
            http://observatory.mountwashington.o...nal&fr_id=1040


            http://www.mountwashington.org/weather/conditions.php

            new work pictures 12/09
            http://public.fotki.com/hvachawk/

            Comment


            • #7
              Re: Drilling into

              Originally posted by HVAC HAWK View Post
              Bingo......
              Great Link for a Construction Owner/Tradesmen, and just say Garager sent you....

              http://www.contractorspub.com

              A good climbing rope will last you 3 to 5 years, a bad climbing rope will last you a life time !!!

              Comment


              • #8
                Re: Drilling into

                Originally posted by garager View Post
                Bingo......
                thank you thank you very much
                Charlie

                My seek the peek fundraiser page
                http://observatory.mountwashington.o...nal&fr_id=1040


                http://www.mountwashington.org/weather/conditions.php

                new work pictures 12/09
                http://public.fotki.com/hvachawk/

                Comment


                • #9
                  Re: Drilling into

                  Originally posted by HVAC HAWK View Post
                  This is what I prefer. I like yours for concrete but these for cinder blocks.

                  http://www.us.hilti.com/holus/module...jsp?OID=-15674
                  Buy cheap, buy twice.

                  Comment


                  • #10
                    Re: Drilling into

                    Originally posted by HVAC HAWK View Post

                    I have some toggle bolts I was going to try.

                    Also can I find these concrete-sleeve-anchors at HD or Lowes.
                    http://www.cgiconnection.com/download

                    Comment


                    • #11
                      Re: Drilling into

                      Originally posted by JimDon
                      Are you using Tapcons? Masonry screws or the Tapcons are really meant for a solid concrete wall and cut their own threads as they're driven in. The cinder block, with its hollow core is a different animal and needs a different kind of fastener. Hope this helps somewhat.
                      Cheers,
                      Jim Don
                      Sorry Jim, not completely true. Tapcons are approved for concrete masonry units with closed ends with min. size of 8"x8"x16". They are approved by the International Building code and the International Residential Building code.

                      HVAC Hawks suggestion was right on.
                      Anyone can tear a man down, few can build one up.

                      Comment


                      • #12
                        Re: Drilling into

                        Originally posted by onlycordless View Post
                        I have some toggle bolts I was going to try.

                        Also can I find these concrete-sleeve-anchors at HD or Lowes.
                        i think i have seen something like it there
                        Charlie

                        My seek the peek fundraiser page
                        http://observatory.mountwashington.o...nal&fr_id=1040


                        http://www.mountwashington.org/weather/conditions.php

                        new work pictures 12/09
                        http://public.fotki.com/hvachawk/

                        Comment


                        • #13
                          Re: Drilling into

                          if your using a hammer drill, your getting blow out on the inside, reducing mounting thickness.

                          Comment


                          • #14
                            Re: Drilling into

                            Before we get into any howling matches let me say that in hollow cinder blocks you need something that just can't pull out without really busting up the cinder block. That's where a good size toggle bolt with wings comes in. I've tried really hard using pry bars to force them out of cinder blocks and end up busting the cinder blocks to bits. For shelving as Jim said you can't risk it falling down on your head. Please get and use the largest toggle bolts you can use for this job. Also, if you can stand it, drill all the way through the cinder blocks and use threaded rods. Put a steel plate on the back side of the cinder block with holes in it for the threaded rods. Now let's see that come out. The whole wall would have to bust apart. I would need to show pictures of what I have in mind using plates and threaded rods. The idea is to prevent any pulling out what-so-ever. I really think the toggle bolts are the best bet in the hollow parts of cinder blocks. They are all steel and hold well.

                            I wish I had pictures showing the toggle bolt close up, measuring for hole size, inserting it through the hole and then tightening. There is one nasty bitchy part with a toggle bolt. If you take the screw out of the butterfly, it falls down inside the wall. Then you have to use a new toggle bolt.

                            Hint: Practice use of toggle bolts by drilling a hole or two in a scrap piece of 1 x 4 or plywood. Insert it and tighten it up. This way you can see what's going on.

                            Comment


                            • #15
                              Re: Drilling into

                              Originally posted by Woussko View Post
                              There is one nasty bitchy part with a toggle bolt. If you take the screw out of the butterfly, it falls down inside the wall. Then you have to use a new toggle bolt.
                              That's one advantage I like with the hilti toggle bars, you can take the screw out and the bar anchor will stay in place. I've also found traditional toggle bolts to be very weak at the joint. You can also buy these at Home Depot.
                              Last edited by gear junkie; 07-23-2008, 07:56 AM.
                              Buy cheap, buy twice.

                              Comment

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