Casting Bolts in Reinforced Concrete foundation
Casting Bolts in Reinforced Concrete foundation
(OP)
A foundation on which a pylon is to be built so that the pylon structure can be placed directly onto it once it's completed.
On the top surface of the foundation (Surface area = 4.5m x 4.5m) 24 holding down BOLTS of length 1000mm are to be CAST VERTICALLY with 800mm of their lengths into the concrete.
The finished LEVEL OF BASE IS TO ACCURATELY ALIGN with the floor of the pylon and the tolerance is +/-3mm.
The location of the bolts is critical; there is only +/-2mm clearance in the pylon bases and all bolts must be 100% vertical.
Can anyone suggest a method of construction which ensures the requirements?
On the top surface of the foundation (Surface area = 4.5m x 4.5m) 24 holding down BOLTS of length 1000mm are to be CAST VERTICALLY with 800mm of their lengths into the concrete.
The finished LEVEL OF BASE IS TO ACCURATELY ALIGN with the floor of the pylon and the tolerance is +/-3mm.
The location of the bolts is critical; there is only +/-2mm clearance in the pylon bases and all bolts must be 100% vertical.
Can anyone suggest a method of construction which ensures the requirements?





RE: Casting Bolts in Reinforced Concrete foundation
The anchor bolt assembly is then placed through the template and secured below to the reinforcing bars within the concrete.
Sometimes there are supplemental steel bars, plates, or other elements that are attached to the bolts near their bottom heads to allow vertical alignments to be controlled.
I've also seen a sort of ring plate (looks like a circular ring with holes cut through for the bolts - a giant common washer plate, that helps align the bolts but allows the concrete to be placed through the ring.
RE: Casting Bolts in Reinforced Concrete foundation
RE: Casting Bolts in Reinforced Concrete foundation
RE: Casting Bolts in Reinforced Concrete foundation
RE: Casting Bolts in Reinforced Concrete foundation
One other concept that I've seen used is to cast the bolts into the concrete but sleeve the top 3/4 of the embedded portion to allow future, minor bending adjustments to the bolt if they are offset slightly. But your embedment would still need to meet the design loads so the bolts would have to be longer to accommodate this. After setting, the sleeves are grouted solid.
RE: Casting Bolts in Reinforced Concrete foundation
You use epoxy or arcrylic only if you dont have temparature more than 160F environment or it will start melting and destroy they polymer. You pretty much drill a hole the same diameter as your all thread rod, brush it off (make sure all the concrete pieces is out of the hole), then blow it with air. Acrylic can set pretty quick and you can use it at cold temparature. Epoxy is harder to use if you are in cold environment plus it takes longer to harden. Pretty much like gluing the rod into the hole. Check out simpsonanchors.com for more info.
RE: Casting Bolts in Reinforced Concrete foundation
Dik
RE: Casting Bolts in Reinforced Concrete foundation
RE: Casting Bolts in Reinforced Concrete foundation