[TheForge] Hammer foundations

[Ralph Sproul]

Cameron,  You could use the epoxy/studs as one method for mounting your
hammer.

The other option would be to take a piece of cardboard and lay out the bolt
patten that was torch cut from the old hammer.   Lay that out on a piece of
3/8 -1/2" plate and plug weld the plate to the studs.

You would obviously have to weld studs to the top of the plate avoiding the
holes you were going to plug weld, and make the upper studs fit your Little
Giant.   You then get to use bolts/studs long enough to use wood blocks to
raise the hammer to the desired height you'd like to have it at.  Counter
boring the wood allows a place for the bolt heads you welded to the plate
for the Little Giant.   That would be all steel stuff I'd have around my
shop and not have to run out to get the epoxy widgets at someone like
Fastenall or a similar supplier.    Just a thought........

Ralph

----- Original Message -----
From: "Cameron Stoker" <cameron@stoker.net>
To: <theforge@mailman.qth.net>
Sent: Sunday, August 10, 2003 10:20 AM
Subject: Re: [TheForge] Hammer foundations


A simpler way to get the same benefit of having the long threaded rods
for hold downs would seem to be possible using epoxy. I'm imaging
pouring an isolated, thick pad (18", 20" ?) under the hammer, then
drilling holes almost all the way through. Oversize the holes, say
1-1/4" holes for 5/8" rods and then using something like red-head epcon
epoxy to bond in the bottom 6" of rod.  The epoxy is pretty amazingly
strong. If you get a deep enough embedment of rod in the goo (varies by
diameter but 2.5" was sufficient for 1/2" threaded rod) the steel or
the cement will fail before the epoxy.  It seems capable of about 30ksi
of tension loading.
This would require a good size hammer drill, but that's something you
probably have/need anyway.
I've been thinking of replacing the mounting anchors on my little
giant with this method. It is currently barely held in with some 1/2"
expanding anchor bolts. Luckily the previous shop owner poured an
isolated 18" thick slab. Unluckily, the mount bolts for it were just
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,
>>>> self
>>>> contained variety. I used to have a 25 pound Little Giant, which I
>>>> mounted per recommended foundation plans. For those who aren't
>>>> familiar,
>>>>  the recommended approach has the mounting bolts made from threaded
>>>> rod
>>>> which ties into the rebar, and runs up through pipe sleeves so the
>>>> ends
>>>> of the rod have some give. While I think this approach makes good
>>>> 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
>>>> of
>>>> mounting?
>>>>
>>>> Thanks,
>>>> Steve Smith

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

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