Anchor hole for 1/2" rod
Anchor hole for 1/2" rod
(OP)
AISC specifies the hold diameters for anchors, but starts at 3/4" with no apparent pattern I can easily detect. Maybe just a low morning - trying to determine appropriate hole size for 1/2" anchors to allow for fit up.
Anyone ever come across this?
You might be thinking...why 1/2" ? We have spacing requirements for anchoring a logo into a concrete parapet. Before everyone get's into a tizzy about the parapet (haha), the building isn't built yet - we are in design working with the building structural to mount this thing.
Normally I'd say just go with oversize holes in lieu of guidance, and since shear is necessary, field weld some washer plates once we are fit up, but perhaps someone has a "legitimate" hold diameter out there...?
Anyone ever come across this?
You might be thinking...why 1/2" ? We have spacing requirements for anchoring a logo into a concrete parapet. Before everyone get's into a tizzy about the parapet (haha), the building isn't built yet - we are in design working with the building structural to mount this thing.
Normally I'd say just go with oversize holes in lieu of guidance, and since shear is necessary, field weld some washer plates once we are fit up, but perhaps someone has a "legitimate" hold diameter out there...?





RE: Anchor hole for 1/2" rod
Dave
Thaidavid
RE: Anchor hole for 1/2" rod
If using a two-part epoxy (my recommendation), then epoxy tube will have specific drill diameters, drill depths, cleaning rules, and hold times before applying weight.
If using a expanding-type insert, then screwing into the threaded insert to expand it into the concrete, you need to know the maker and style to find the drill diameter.
Can't just insert the rod into a hole.
RE: Anchor hole for 1/2" rod
Racookpe - I don't know whether I should be insulted haha (I'm not) or what, but it's a cast-in-place anchor rod. I was talking about the holes in the base plate itself. For fit up, due to variances in the field or whatever you want to call it, AISC allows for larger than "normal" bolt holes for the anchor rods. My apologies if that wasn't clear.
RE: Anchor hole for 1/2" rod
RE: Anchor hole for 1/2" rod
RE: Anchor hole for 1/2" rod
HOLES IN BASE PLATES, SIZE AND THICKNESS OF WASHER SHALL BE AS FOLLOWS
AB DIA BPL HOLE DIA MIN WASHER DIA MIN WASHER THICK
(IN) (IN) (IN) (IN)
1/2 1 1-3/4 3/16
5/8 1-1/8 1-3/4 1/4
3/4 1-5/16 2 1/4
7/8 1-9/16 2-1/2 5/16
1 1-13/16 3 3/8
1-1/4 2-1/16 3 1/2
1-1/2 2-5/16 3-1/2 1/2
The post has spaces between the numbers that don't show up.
Dik