U/G feed to column w/o handhole

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RayS

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Cincinnati
here's the problem. Structural steel tower, about 40' tall.
4- 1" underground feeds, 1 to each corner, thru the baseplate of 12" tube column. Wire fished from end of conduit to boxes 20' up column. There is a 6" thick real stone column wrap at the base to 4' hi. I only need 2 of these feeds, and 1 is LV only.

Rejected due to no handhole at the end of the conduit.

I'm thinking cutting and welding a handhole about halfway up the columns above some intermediate crossmembers, (this will lessen the structural implications) then trying to fish a conduit down to bring the end of the conduit up to the handhole. A real pain.

Any ideas??
 
Yikes. Someone didn't plan ahead huh?


How about digging up the feed and surface mounting the conduit up the pole?


I'm not chopping a hand hole in a 40' x 12" column without someone's written approval.
 
yep. My faulty assumption about being able to use the column as a chase (w/o handhole at the conduit entry) was the root cause.

Surface mounting would involve tearing up a brick paver over concrete plaza, and would not look as good.

Structurally we are OK if we open it up at the higher location, as there is much less bending moment there.

We also we looked at it and discussed it with the architect.
 
hang a nice picture in front of the hole

hang a nice picture in front of the hole

Just kidding. Could you fish down in flexible conduit to the pipe and fasten with expandable foam as needed up to the jbox??
 
well, I thought about fishing some LiquiTite and an adaptor down there, or even thru the entire run to the pull box. Figured my best bet to actually get the conduit connected was to fish the bell end of another PVC down onto it.
 
pvc pipe

pvc pipe

RayS said:
well, I thought about fishing some LiquiTite and an adaptor down there, or even thru the entire run to the pull box. Figured my best bet to actually get the conduit connected was to fish the bell end of another PVC down onto it.
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if this seems possible it would probably be the easiest solution. If the wire is already pulled in you could cut the pvc pipe with a piece of mason line with the wire in the pipe without damaging it. Pull the mason line back and forth and it will melt its way right through the pipe. Pull the wire away from the side you are cutting go half way through then repeat the process from the other side. It takes a little time to get the feel for the mason line saw thing so dont get discouraged.
 
Structurally we are OK if we open it up at the higher location, as there is much less bending moment there.
Click to expand...

It seems to me that you would be better off cutting the hole at the base. There is more material and zero movement at the base.
 
220/221 said:
It seems to me that you would be better off cutting the hole at the base. There is more material and zero movement at the base.
Click to expand...
Well that depends... If you have a larger overall surface area then a hole of the same size would have less effect. If the metal is thicker then you'd have a greater effect. Leverage might also come into play. Too many variables... ask an engineer.
 
structure wise, it is a constant section (12" tube) top to bottom, so it would be better to get away from the bottom so there is less bending moment and less dead load
 
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