Very tall free-standing pole (for stove-pipe support)

[Gulf]

Re: Very tall free-standing pole (for stove-pipe support)

Going back to Tscarborogh's guy wire idea. You were concerned about what to anchor the wires to and children running into the wires. How about finding locations for three posts cemented into the ground. They would need to be set at 1/3rd intervals of a circle drawn from the center of your chimney. The exact distance would be for you to decide based on the shape of your back yard. Now, here is the kicker. Dig the holes, set 8'X6"X6" posts in concrete about 3 feet in the ground. Put a flower bed around each one. Plant some ivey or running roses and train them to grow up the pole. Then and only then, tell your wife that the top of each post would make excellent anchor points for the guy wires of your chimney .

[kebwi]

Re: Very tall free-standing pole (for stove-pipe support)

So one possibility I'm considering is galvanized pipe, the kind of typical pipe you see as vertical and top-bar struts in chain-link fences or as is occasionally used for telephone poles. Bear in mind that the idea is to construct a rigid vertical pole (wood or metal) from which to attach a horizontal arm (or two) to support a stove-pipe.

A few questions:

How thick (wall-thickness and pipe diameter) would you recommend for this purpose? I was thinking 2-1/2" or so (I'm less clear on wall-thickness).

Are there any issues setting this kind of metal into a concrete footing? Should I wrap it in plastic so it doesn't directly touch the concrete?

[cobblerdave]

Re: Very tall free-standing pole (for stove-pipe support)

Gudday
Could you not make your support structure into an overhead cover for the oven with roof etc to aprox 1/2 way up the chimney height, then guy wire the remaining chimney lenght from the top of the roof structure. Doesn't look like a chimney support but part of a roof structure around a chimney......
Just the germ of an idea.....someone might expand on this


Regards Dave
PS
the pipe in the cement but usually rust out just where it exits the cement this is the area ypu'll have to keep an eye on over time and rust proof and paint as maintenance. With wooden posts in cement in the ground don't fill the bottom of the holes with cement otherwise you make a bowl for water to sit in. Best practice is gravel at the bottom of the hole put in the post (H3? treated or better) then cement around the sides.

[kebwi]

Re: Very tall free-standing pole (for stove-pipe support)

[QUOTE=cobblerdave;133801]Gudday
Could you not make your support structure into an overhead cover for the oven with roof etc to aprox 1/2 way up the chimney height, then guy wire the remaining chimney lenght from the top of the roof structure./QUOTE]

I've attached one of my numerous earlier design ideas for the oven. As you can see, I once considered a roof. However, the current design has plants growing all over the oven, so, I don't think a roof is going to work anymore.

The basic idea of sinking a pole or two in yard around the oven to make guy wire anchor points isn't entirely off the table, I just haven't committed to it yet. I'd prefer to intrude into the yard as little as possible.

Thanks though. It's a good idea.

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

Like this:

[Faith In Virginia]

Re: Very tall free-standing pole (for stove-pipe support)

Tscarborough , That's cool idea, It would work great on tall and thin poles to keep the weight down.

Also on the bright side ( pun intended) think of all the Christmas lights you could run on that rigging.

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

It is not hard to do, with the stack he is talking about it would work with three wires on 2 sets of stays. The hard part would be ensuring the continuity of the stack, i.e. the sections would have to be welded together. 40 to fifty foot outriggers (on tapered 3-4" butt size aluminum poles) are common, and they are mounted to boats subject to extreme wave and weather conditions and high lateral loads. They work.

[kebwi]

Re: Very tall free-standing pole (for stove-pipe support)

It is not hard to do, with the stack he is talking about it would work with three wires on 2 sets of stays. The hard part would be ensuring the continuity of the stack, i.e. the sections would have to be welded together. 40 to fifty foot outriggers (on tapered 3-4" butt size aluminum poles) are common, and they are mounted to boats subject to extreme wave and weather conditions and high lateral loads. They work.

Wait, are you suggesting I weld the pipe sections together?!

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

You would have to, as that design requires a stressed main member.

[kebwi]

Re: Very tall free-standing pole (for stove-pipe support)

Yikes, I have no idea what you're talking about. What is a stressed main member? The pipe pieces screw together like conventional double-walled pipe. Are you saying I shouldn't just screw them together and put them up on the oven with lateral support? Are there additional steps I need to take which I haven't considered yet? Someone mentioned a damper, so I'm doing some research into that.

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

If it screws together, that is good enough, what would be key with a stayed stack would be the connection at the base. It may not work after all.

[kebwi]

Re: Very tall free-standing pole (for stove-pipe support)

If it screws together, that is good enough, what would be key with a stayed stack would be the connection at the base. It may not work after all.

Well, now I don't know what a "stayed stack" is. This thread isn't going very well for me. I simply have no idea what's going on anymore. Half the responses in this thread introduce new (and I would suspect unnecessary) industry-specific jargon. Isn't it possible to answer these questions without requiring all members of FB to already have years of industry experience in very domain-specific terminology? I'm sorry I have to keep asking stupid questions. This has got to be at least the third time in this thread alone that I cannot understand an answer because it includes some esoteric term. Is that really necessary?

Is this going to work or not? Can I put a tall stove pipe on a Pompeii oven or not? It sounds like there are a lot of concerns and objections being raised. Is this plan just not going to work?

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

Sorry for the jargon, just trying to be precise. Normally a stack that tall would be enclosed in a chase and thus supported. Your main issue is going to be wind, and that type of pipe is not strong enough to be self supporting at that length.

[Faith In Virginia]

Re: Very tall free-standing pole (for stove-pipe support)

kebwi, I looked at your idea again it was not a bad idea to start with. I thought you were looking for alternative ways

Now back to your idea. Looks good but I would make a few tweaks. For your idea I would use a large diameter pipe with thick walls. 20' feet out of the ground is not that big of a deal.

If you can get your hole 5' down would be better and make the bottom of your hole large like 2'x2' then get your pole standing in it's place and fill the hole with like 8" of concrete. Fill your hole with dirt and pack it in. Then add a slab of some type at ground level around the pipe, The upper slab in the range of 4'x4'x6" thick.

With that set up that pole will NEVER move an inch.

Now I'm not sure about your connection from the pole to the stove pipe. It may work and it may not. I like parts of Tscarborough idea on rigging. You may need to have two points of stability to the stove pipe. So if you use your single pipe idea and run a horizontal bar (think of a tall ship mast) then secure the stove pipe to the two ends of that horizontal bar. I don't imagine that horizontal bar needs to be overly large or long just center a 4' bar would be fine.

Hope that helps

[Tscarborough]

Re: Very tall free-standing pole (for stove-pipe support)

OK, I went and looked at your oven again. You can forget that other than with 2 sets of guy wires, one at the top with about a 60 foot diameter, and another midway with about a 40' diameter.