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Author Topic: If you had a chance to run any extra AV lines prior to construction what would you run.  (Read 4827 times)

Jerrybosun

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If you had a chance to run any extra AV lines OTHER THAN THE ONES REQUIRED for your current equipment, prior to construction what would you run.

For a large 3000 plus hall.


What I am looking for is future standards. Please dont respond with "call a contractor to discuss this" I am well aware of the contractors that are out there. thanks.

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Brad Weber

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There are no future standards and trying to guess at what may be required over the expected lifetime of a new facility is somewhat fruitless.  That does not mean that some initial accommodations are not worthwhile, but it may be more important to accommodate the future with approaches such as oversized or extra conduit than it is to try to accommodate it with actual cabling.  This may also affect the conduit concept, for example you may decide to run from FOH to some intermediate boxes at the stage and other critical locations rather than point to point so as to allow for easier additions, revisions and reconfiguration.

You can never have too many of anything.  Obviously, what that involves depends greatly upon your application as that will affect the signal types involved, reliability and redundancy required, etc.  CAT5/5e/6 is becoming a common need and is easy to accommodate a few extra.  There may be some decision here, a CAT5 cable could potentially serve for data, video, audio, control or other uses so from that perspective it makes much more sense to run a couple of CAT cables rather than multiple dedicated lines.  However, this also them ties you into purchasing the appropriate interface devices to be able to use those lines, which may offset much of the savings.  But I would probably pull a few extra anyways.  Some people are going to fiber rather than CAT cabling.  This makes sense for some applications and will probably be more common in the future, but it can be an expensive proposition to incorporate now if you go beyond simply running and terminating the fiber.

You can accommodate some future proofing in the cabling used.  Using audio and video cabling appropriate for digital signals may cost more than using generally equivalent cable for analog signals, but may offer some performance advantages and provides for compatibility with future digital sources.  That is assuming those don't also change, which is one of the real issues, you can plan for the future but by the time that becomes relevant for you, what you planned for may have been superseded.  There is no way to know this as it depends not only on what new technology may bring, but also upon at what unknown time in the future any such changes may occur.  For example, many people jumped into DVI only to have it greatly being supplanted by HDMI which in a few years may be replaced by something else.  And even different versions of HDMI incorporate different cable requirements, so what was put in a few years ago may not support the latest standards.

A somewhat separate issue is providing additional capacity for near term use, such as planned expansion, or for redundancy.  That maybe desired regardless of what is done to accommodate the future and may be determined greatly by what the current system requirements are.  For example, if you have 24 mic lines and 8 line level lines from FOH to the stage, you may want to run 30 mic lines and 10 or 12 line level lines so that you have room for growth and the ability to deal with a line going bad.  But it may be more difficult to justify running two RGBHV lines to the projector.
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Brad Weber
muse Audio Video
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Jerrybosun

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Thanks It sounds like some xtra cat 5/6 and a fiberoptic is a solid direction
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Greg Hertfelder

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I wouldn't run any cabling in addition to what is required - just make sure the contractors leave "pull string" tied off on each end. Then you can run anything in the future.

And then make sure that replacement pull string is replenished when you install new cable or fiber or whatever.
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Brad Weber

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On larger projects most people will pull some additional lines.  For example, if you have 48 mic lines running from the stage to FOH, then initially pulling 50, 52 or even 56 is usually a relatively small cost compared to having to pull additional lines should one or more be damaged during installation or a couple of additional lines needed in the future (or sometimes before the installation is even complete).  Also, don't forget that there are code restrictions on conduit fill and that pulling new lines in conduit that is almost filled with existing lines can be difficult even with a good pull string.
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Brad Weber
muse Audio Video
www.museav.com

Jerrybosun

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Yeah draw strings...  a no brainer.....  I would like to lay in things during new construction for fiscal reasons...easier to get a new piece of equipment in future budgets if the install does not have a $1500 labor/wiring fee attached . Rolling some of these costs into new construction budgets verses AV budgets make s a bit more sense for this particular case. The elders are not as tech friendly as say Joel Osteen's bunch.
Did ya know ..... Joel was the AV guy at his church before he ever said a word....  
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Tim Padrick

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I had that dilemma at the theater.  The biggest cable Horizon made was 58 pair, so that's what I got.  Buy it once, install it once.

Run a few CAT5 or CAT6 while you are at it.

Arnold B. Krueger

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Jerrybosun wrote on Wed, 16 January 2008 14:27

If you had a chance to run any extra AV lines OTHER THAN THE ONES REQUIRED for your current equipment, prior to construction what would you run.

For a large 3000 plus hall.


What I am looking for is future standards. Please dont respond with "call a contractor to discuss this" I am well aware of the contractors that are out there. thanks.




Right now it looks like whatver the next future standard will be, there will be some way to run it over CAT-5/6.

Case in point would be HDMI. If you want to run it over distances typical of a room your size, what better way than to use CAT 5/6 line extenders?
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Gil Parente

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another vote for Cat5/Cat6.

easy to pull and very useful now days and days to come.
Think of all the cat5 extenders that are out there.

take care

Gil
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