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#1
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Anchoring concrete block row and base plate to existing porch slab?
I'd like to get some ideas about anchoring a base plate for a wall to enclose an
existing covered porch. Naturally, the slab for the porch exists as does the roof overhead. I need to put in a wall at the edge of the concerete porch. The slab is pretty near grade so I want to run a row of 4" concrete blocks along the edge of the slab to keep the wood framing above grade. What would some ideas be to put anchor bolts into the existing slab? Are there lead anchors to this effect where you drill a hole and hammer them in? Or are there other more preferable ways to insert anchor bolts? I've used lead and other similar anchors for smaller applications but never for anchor bolts before. I also would like to get some suggestions as to putting the anchor bolts through the blocks and up through the base plate. One idea would be to have a short anchor bolt sticking up from the existing slab into a cell of the concrete block and then to insert a bolt into the cell and grout the cell solid. (I do believe you can get 4" blocks with open cells - if not I'm faced with boring a hole straight thru a block) Another would be to simply try to find a bolt long enough to extend from the existing slab, through the 8" height of the block and out the top leaving enough thread to go thru the base plate and put on a nut and washer. There may be other solutions. I'd love to hear any other ideas for doing this. |
#2
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Anchoring concrete block row and base plate to existing porch slab?
There may be other solutions
Given this problem, I'd frame in a an appropriately sized trough, lay out the mud pan and hoe, hop in the ol' pickup and get a bunch of WhoopeeCrete and a case of vintage brew and call my buddies to spend a happy Saturday, mixing, pouring and smoothing. With the pour complete, shove the anchor bolts in their proper location and after curing start your wall. You already know about square, plumb and level, right? And adding the magic bonding agents to the concrete, and cleaning the old slab first? HTH Joe |
#3
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Anchoring concrete block row and base plate to existing porch slab?
Joe Bobst wrote in message ... There may be other solutions Given this problem, I'd frame in a an appropriately sized trough, lay out the mud pan and hoe, hop in the ol' pickup and get a bunch of WhoopeeCrete and a case of vintage brew and call my buddies to spend a happy Saturday, mixing, pouring and smoothing. With the pour complete, shove the anchor bolts in their proper location and after curing start your wall. You already know about square, plumb and level, right? And adding the magic bonding agents to the concrete, and cleaning the old slab first? HTH Joe Heh... you have a way with imagery I thought of pouring a base instead of laying blocks. It's just that I'm not convinced that the framing involved wouldn't be more work. In either case you wind up with primarily the weight of the concrete or block being that which holds it in place to the slab (even with bonding agents the WEIGHT of the base is primarily that which holds it there). Indeed, the anchor bolts would be easy to place in a pour such as that. As for smoothing - heh! Who cares! It just needs to be formed well enough to hold the base plate on top, accept stucco on one side and drywall on the other. Just so you know the scope of the project, we're talking about merely 34 lf of wall, 12' of which will be occupied by sliding glass doors - so there will only be about 22 lf of wall for which I need a base. Seems blocks would be the easier solution that setting up plywood formwork and having to get the needed stakes and bracing. |
#4
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Anchoring concrete block row and base plate to existing porch slab?
The largest issue has to do with a footing.
If there is to be a permit, you will definitely need a footing. I doubt that a porch would have had one. It should be easy to excavate at the outside edge of the slab to see. If you just have a slab, you need a different approach. Code will require a full depth footing under all exterior walls. Here that is 18", it will vary based on frost depth. If you need a footing, you might cut off the existing edge or move the wall line out. Excavate, form, and pour the footing with a stem wall to carry your new exterior walls with j bolts. There are several self leveling floor levelers sold to compensate for the fall on the existing patio. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Keep the whole world singing. . . . DanG "Stellijer" wrote in message .. . I'd like to get some ideas about anchoring a base plate for a wall to enclose an existing covered porch. Naturally, the slab for the porch exists as does the roof overhead. I need to put in a wall at the edge of the concerete porch. The slab is pretty near grade so I want to run a row of 4" concrete blocks along the edge of the slab to keep the wood framing above grade. What would some ideas be to put anchor bolts into the existing slab? Are there lead anchors to this effect where you drill a hole and hammer them in? Or are there other more preferable ways to insert anchor bolts? I've used lead and other similar anchors for smaller applications but never for anchor bolts before. I also would like to get some suggestions as to putting the anchor bolts through the blocks and up through the base plate. One idea would be to have a short anchor bolt sticking up from the existing slab into a cell of the concrete block and then to insert a bolt into the cell and grout the cell solid. (I do believe you can get 4" blocks with open cells - if not I'm faced with boring a hole straight thru a block) Another would be to simply try to find a bolt long enough to extend from the existing slab, through the 8" height of the block and out the top leaving enough thread to go thru the base plate and put on a nut and washer. There may be other solutions. I'd love to hear any other ideas for doing this. |
#6
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Anchoring concrete block row and base plate to existing porch slab?
Gosh...
A group like this and I only get one reply? Is only one person familiar with anchor bolts and existing slabs? |
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