[TheForge] Hammer foundations

[Cameron Stoker]

	A simpler way to get the same benefit of having the long =
threaded rods=20
for hold downs would seem to be possible using epoxy. I'm imaging=20
pouring an isolated, thick pad (18", 20" ?) under the hammer, then=20
drilling holes almost all the way through. Oversize the holes, say=20
1-1/4" holes for 5/8" rods and then using something like red-head epcon=20=

epoxy to bond in the bottom 6" of rod.  The epoxy is pretty amazingly=20
strong. If you get a deep enough embedment of rod in the goo (varies by=20=

diameter but 2.5" was sufficient for 1/2" threaded rod) the steel or=20
the cement will fail before the epoxy.  It seems capable of about 30ksi=20=

of tension loading.
	This would require a good size hammer drill, but that's =
something you=20
probably have/need anyway.
	I've been thinking of replacing the mounting anchors on my =
little=20
giant with this method. It is currently barely held in with some 1/2"=20
expanding anchor bolts. Luckily the previous shop owner poured an=20
isolated 18" thick slab. Unluckily, the mount bolts for it were just=20
torched off, and they interfere with the mount holes for the LG.

	Comments?

>>>> Air Hammer:
>>>> The yet unfinished air hammer will be about 40 pound head weight,=20=

>>>> self
>>>> contained variety. I used to have a 25 pound Little Giant, which I
>>>> mounted per recommended foundation plans. For those who aren't=20
>>>> familiar,
>>>>  the recommended approach has the mounting bolts made from threaded=20=

>>>> rod
>>>> which ties into the rebar, and runs up through pipe sleeves so the=20=

>>>> ends
>>>> of the rod have some give. While I think this approach makes good=20=

>>>> sense,
>>>> I've just moved and many of my shop tools aren't easily set up (not
>>>> having a shop...). Does anyone have experience with simpler methods=20=

>>>> of
>>>> mounting?
>>>>
>>>> Thanks,
>>>> Steve Smith

				Cameron Stoker
				cameron@stoker.net
				"May you run like a vicu=F1a!"
				pgp key @ http://keys.stoker.net