Low-profile way to fasten insulated copper tubing

[Rossn]

I have a number of copper plumbing runs (city supply, well, irrigation, dhw & recirc, etc) that I need to attach to the underside of the joists, and will furr down the ceiling 2". Several runs will be insulated... ideally continuously.

What is the best low-profile, acceptable way to attach the continuously insulated runs (several adjacent to each other)? Can I use strapping (galvanized or plastic) over the top of the insulation, with or without a full wrap?

 

[James Henry]

Choose a clip, they can be covered with insulation very easily.

https://www.google.com/search?q=pla...VTBc0KHUSfAPMQ_AUoAnoECAEQBA&biw=1600&bih=767

 

[Sponsor]

 

[Rossn]

Thank you. I see one clip option at supplyhose. However, I only have 2.25" to fit the plumbing with insulation and also a 16 gauge piece of steel as a nail plate. 3 of these lines are 1" Copper, and that sheet shows the distance it hangs down as 1.9", and then I have another 1/2" of insulation + nail plate. I would like it to look profession did it, also have the space limitation.

 

[Fitter30]

1/2" covering is 1" + the pipe od. One or two hole conduit clamp take some thin aluminum flashing ( roof dept) form it over bottom half of pipe 12" long to spread out the weight not to crusn covering.

 

[Rossn]

Yes, though I am saying the clip hanger has a depth that includes all but one side of the insulation, and with that, it would come to 2.4"+steel, which is greater than the 2-1/4" I have to work with. Yes, the tubing+insulation does fit, in itself. Help me understand the purpose of the aluminum flashing? Just to prevent damage to the insulation?

Is it a notably bad idea to just use strapping across the insulated tubing?

Since I have to put some steel on the underside, where I have 3 runs ganged side-by-side, maybe I just cut some 12"x6" 16-gauage steel and use that at intervals, screwing through it, and into the joists... basically a sandwich. Again, maybe not conventional enough to be acceptable; almost like a cable raceway.

 

[wwhitney]

Having a larger area of contact will reduce insulation crushing. You could take a look at the fabric webbing used for securing insulated ducts. Non standard but I don't see a problem.

Cheers, Wayne

 

[Rossn]

Agreed on the larger area for insulation compression... that said more than 1.5" wide doesn't help much, given the joists are 1.5" wide. For plumbing products, Oatley makes this 1-1/2" strapping (a bit rigid). I'm assuming that despite being copper tubing, the insulation separation would make it OK with inspectors to use this steel strapping.