![]() ![]() ![]() They have some 1/4" size hex head anchors that uses a 1/4" drilled hole, which is bigger than the Tapcon holes. I see that Simpson has a line of concrete anchors called TITAN HD. Should I but some two part epoxy and squeeze into the holes? Should I try some wood tooth picks into the holes? Looking for other ideas to how to fix those 20 holes. I have done this before with acceptable results, but this time it didn't. I stripped off some #10 stranded electrical conductors and stuffed a half dozen strands into the hole and worked the screw in by hand. But it's hard to hammer in the set nail with the profile of the aluminum track sticking out very close to the nail, I hit the profile a few times accidentally. I have one top track where 4 out of 5 screws were loose, so I replaced all five with hammerset nails and that worked. However they look different from the hex head white Tapcon screws so a mix and match would look too odd. (2) I have some 1/4" hammer set nails with me. Only 1 screw held tight with this approach. Obviously this will only work for solid concrete as 2-1/4" is past the thickness of the blocks. (1) I bought a box of 2-1/4" long Maxiset Tapcon screws, and drilled another 1/2" deeper and tried those. Of the 25 spinning connections, here is what I did in this sequence. I set the drilled depth to be 2-1/4" deep, used compressed air to blow out the concrete dust in the holes, then drive the Tapcon screws in with a 18V compact driver until it is about 1/8" off, then use a rachet wrench to slowly tighten in snug. The tracks are white and the screws are white. I used the standard mounting hardware which is 1-3/4" long 1/4" white color Maxiset set Tapcon screws. Holes were drilled with a Bosch bulldog extreme rotary hammer, corded, with SDS plus 3/16" bits. I always drilled nice and straight and steady, with a new sharp bit. I either drill a new hole at a different spot, or use some other tricks to get it tight. I have used Tapcon before and once in a while I do get one or two to spin. Of the 350 holes I mounted with Tapcon screws, 25 of them didn't go in tight, instead it spins. I would say about 20% of the bottom holes I hit the voids in the blocks. House is concrete block stucco construction, most of the top headers were into solid concrete (tie beam), most of the bottom tracks into either solid or blocks. I drilled over 300 holes in concrete and concrete blocks. ![]() Last few days I drilled and mounted aluminum tracks for hurricane storm panels on my windows and doors. Tried to mount something in concrete and the Tapcon screws would go in nice and tight instead it spins. ![]() You might need them if the gap is too skinny to get the conventional ready mix (contains gravel) to slide through.OK we have all done it. There are special mixes that are made for this ("non shrink grout") but they are pretty expensive and might be overkill for a shed project. You might have to make some kind of a plywood funnel chute to avoid creating too much of a mess. Jam a 1/2 inch steel rod down into it and rod it down to fill the void as you go. I go for something more like oatmeal than soup. If its too wet you'll know it, back off on the water. Start off with a little less than one gallon of water per bag and adjust until you have something that will flow rather than slide off your shovel and through that slot. (I have no numbers to back that up, totally gut feel). If you add about 5-10 pounds of cement powder to a 60 lb bag of ready mix, blend it thoroughly when dry you can then add enough water to have a pretty wet runny mix that will still provide decent enough strength because of the added cement. What I've done is get conventional ready mix in small bags (60 lb bags) and add small amounts of cement when I mix each bag (powdered Portland cement). Mix small batches because it will be slow going to get it through that slot and into the blocks. Click to expand.It looks like that gap is maybe an inch wide? If it is you need something you can mix yourself in small batches, a bag at a time and you will need it to be pretty runny/fluid. ![]()
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