PVC Bolt Sleeve for future Anchor Bolt
PVC Bolt Sleeve for future Anchor Bolt
(OP)
I have a concrete pedestal, which will hold a 18 foot W14x68 column. Due to unusual circumstances, this pedestal must be cast in place but not with its 4 anchor bolts. The 1 1/2" x 34" anchorbolts (28" into concrete) will be installed after the pedestal has been cast, column is in place and temporarily secured.
I'm thinking of casting the pedestal with PVC pipes in the location of the future anchor bolts, this will allow me to leave a penetration in the pedestal to install the anchor bolts afterwards. But im not too confident I will be able to pull out the PVC after the concrete hardens and before installing the bolts. Any ideas guys?
I'm thinking of casting the pedestal with PVC pipes in the location of the future anchor bolts, this will allow me to leave a penetration in the pedestal to install the anchor bolts afterwards. But im not too confident I will be able to pull out the PVC after the concrete hardens and before installing the bolts. Any ideas guys?





RE: PVC Bolt Sleeve for future Anchor Bolt
From the bottom:
a plate;
a short piece of pipe welded to the plate;
a plate, large enough to be the anchor plate, drilled with a heavy nut welded to the bottom of the plate, welded to the pipe;
a long piece of pipe, welded to the plate, with the top, level with the top of the concrete. We packed the top with rags to stop concrete getting inside.
The stack was put in position, leveled on shims, the threaded rods inserted and screwed into the bottom nut until they hit the bottom plate. The top nut was snugged and the grout was dry packed. Now you would use flowable grout.
It sounds expensive, but you easily save more money in field costs.
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: PVC Bolt Sleeve for future Anchor Bolt
WildCard09...you can lightly grease or oil the sleeves, but I would make the sleeves smaller and then drill out afterward by just running a chase bit down the hole to remove and grease or oil residue. You can also use a variety of tools to roughen the inside face of the hole (a brake cylinder hone for instance...flexible and can be put on long shaft).
If you use the method your thinking about, keep in mind you have no positive anchorage at the bottom of the bolt, so you're depending completely on side bonding...with that in mind, I hope your depth of embedment is sufficient to compensate.
Using Michael's method will give positive anchorage at the bottom of the bolt and allow you to mobilize stress resistance in the concrete as it should be.
RE: PVC Bolt Sleeve for future Anchor Bolt
RE: PVC Bolt Sleeve for future Anchor Bolt
RE: PVC Bolt Sleeve for future Anchor Bolt
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: PVC Bolt Sleeve for future Anchor Bolt
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RE: PVC Bolt Sleeve for future Anchor Bolt
RE: PVC Bolt Sleeve for future Anchor Bolt
RE: PVC Bolt Sleeve for future Anchor Bolt
Precast piles have seen rebar dowels (pourable cement or epoxy) grouted into sleeves of material similar to metal flex conduit. The spiral convolutions of the flex and rebar deformation provide resistance to pull-out.
Yosh