Vertical Support 1

[Jtodd]

Ok, I should know the answer to this, but I haven't delt with it much, and need some other oppinions.

Setting the stage, we are talking about the Horizontal portion of a cabling system (captial H was intentional) not the riser system in anyway. Situation is a multifloor building with a single telecom room on one floor.

In this instance, as an example, all the cable from the third floor must pass through the second floor pull closet to get to the first floor telecom room.

The question is, how would you support the vertical portion of this cable on the second floor? The other question is the support on the third floor where the cable turns from horizontal to vertical and crushing the cable at that point, and the weight distribuition down vertical portion.

Now, if this were Riser cable, no problem. But being that it is Horizontal, mounting loops or heavy duty straps are sort of out. I've got a couple ideas, but would like to see what other people think.

Justin

Justin T. Clausen
Physical Layer Implementation
California State University, Monterey Bay

 

[franklin97355]

Why would you treat this any different than riser cable? I would support the cable every eight feet and turn the corner with some support that would give me a radius on the bend.

 

[Jtodd]

Mostly because we're trying to get way from the use of wire ties on horizontal cable, so just strapping the cable to a d-rings doesn't quite cut it. We're using ARMM armored cable for phone, so cranking down on it with tie wraps isn't an issue so much. Also, because of distance issues, obviously we can't add loops and mount those.

At the same time, that is sort of my question, should we treat it any differently? Right now, our best solution is to break up the large bundle into smaller ones, and attach them separatly to the d-rings or tie wraps and saddles, making sure the bulk of the slack is at the top floor of the run.

Justin T. Clausen
Physical Layer Implementation
California State University, Monterey Bay

 

[franklin97355]

I've seen 1 inch velcro straps that can be screwed to the wall and then support the bundle. I have supported vertical wire at 8 foot intervals but in large bundles I split the bundle and put my supports at 4 feet and use them alternatly for smaller groups with a wrap around the whole bundle at each point.

 

[dhnl]

http://www.erico.com/products/CaddyCFCVertBackboneSprt.asp

 

[Kwick18]

You could also use ladder rack. Install a horizontal section with a sweep 90 bend on the 3rd floor then a vertical ladder thru the second floor. Strap or velcro to the ladder going down.

 

[rpearson]

I would second Kwicks suggestion. Ive installed 12 inch ladder rack for vertical support directly out of the sleeves in closets, and it looks pretty good too.

 

[Jtodd]

My concern with that method, is to take the weight off the lowest point of the cable, the attachment to the ladder rack needs to be fairly tight. Which obivously isn't the best thing, and if you've got to using Velcro instead of ties, well, it's not going to be all that tight at all.

Justin T. Clausen
Physical Layer Implementation
California State University, Monterey Bay

 

[franklin97355]

If you support the cable every 4 to 8 feet you are only supporting that section of cable so the weight does not build too high.