Is this anywway legal to do? I was told it would be OK to do this just drill out the back of the box and thread the nipple into the gas pipe with a washer to hold the 4in round up. This is in an old house with large plaster medalion's I recommended using gum to stick the box up to the joist and got a funny look.
I usually remove the gas pipe. Either way it is a pain. I had a live one once and that was a little scary. If your going to use gum make sure it's not sugarless. This has far less holding power than standard gum.
Re: Fixture support from old gas pipe#37396 04/27/0406:45 PM04/27/0406:45 PM
When I first came in the trade, there was still provision in the DC code to USE the gas pipe, not only for support, but it told us what we had to do to pull wires in it, and how many RW's and TW's we could put in a 3/8" pipe.
I expect it's frowned on now
BTW, that was back in the ANCIENT early 70's.
Re: Fixture support from old gas pipe#37397 04/27/0406:51 PM04/27/0406:51 PM
I have no doubt about the gas pipe being able to handle a pretty sizable load, I'd probably use a good size washer & the use double locknuts to make sure they don't come loose... is the box rated for the weight of the fixture? If all these things come together, I don't see any problems.. Although if the pipe is your raceway, there might be a code issue Im just not thinging of right now...
Re: Fixture support from old gas pipe#37400 04/27/0407:50 PM04/27/0407:50 PM
I ran a 4.25 in hole saw up into the nipple of the gas pipe for a center location and cut the plaster and pipe in no time. Then installed a box and brace. As far as the pipe being able to support the weight, not in this house. On 2 other locations like this in the same house I made a small hole on each side of the medalian and cut the pipe and it slid out of the way no problem. It had no clips as the hole pipe run was loose and able to move so all the weight would have been supported by plaster and wood lathe
Re: Fixture support from old gas pipe#37401 04/27/0410:24 PM04/27/0410:24 PM
In Chicago I used to run into a lot of round ceiling boxes with the gas pipe attached to the center KO. Usually the box was also attached to anywhere from 1 to 4 1/2" black rigid pipes. That box wasn't going anywhere!
Re: Fixture support from old gas pipe#37402 04/27/0411:13 PM04/27/0411:13 PM
This is in an old house with large plaster medalions
Without a more specific description of the age and construction of the house, what I'm going to say is only a generalization.
The original gas light fixture, that the gas pipe povided fuel for, simply hung on the end of that gas pipe. Hanging an electrical luminaire off that gas pipe, whether the gas is on or off, will not present any more stress on the pipe than the original gas light.
The presence of the medallion, to me, hints at historic significance that, if at all reasonable, should be preserved,. . .so hacking at the location to quickly get done may not be practical. Rather, the client can likely understand, and value, that marrying contemporary material to a historic system will take more time in order to minimize collateral damage.
Over my career, I've worked in a lot of old dwellings that were first lit with gas. As the building aged and the availability of electricity became reliable, the gas fixture was removed and replaced with an electrical unit. In some cases, the homeowner would seek out and install fixtures manufactured to provide both gas flame light and electric light. IMHO, the finished surface appearance of rooms that are from the gas to electric conversion period, if still present, are of significant historic importance and valuable in its own right.