Hello Bill, Thank you for your reply and comments. I had to remove the sketches I attached for the messages to the TAUG list, but I'll send them separately to you.. I commented directly back to you, but I'll summarize the key questions I have for the project:
-the conduit runs are fairly straight, but will have a 90 degree elbow on each end running into a outdoor box - will this be an ok pulling setup? -can you recommend any wall and poll outdoor boxes that can have conduit run into them and store extra fiber in a figure 8? One of the buildings is planned to have 3 separate conduit lines come into it. Is there a box that would house several fiber lines coming into it and their slack? *Note - the attached picture wallbox_example hopefully illustrates what I mean* -do you know who might supply HDPE roll-style conduit? (there's already the PVC-DUCT conduit ordered and on site for the current runs, but theres future runs we have not yet bought supplies for that HDPE conduit sounds more ideal for) On Sun, Nov 23, 2008 at 8:35 PM, Bill Sandiford < [EMAIL PROTECTED]> wrote: > Steven: > > We have some underground fiber projects going on right now. If you send me > the sketches I would be happy to look at them for you. > > For your conduit, are you using 10ft sections that you are gluing together > or are you using the HDPE style that comes in rolls? How many conduits are > you running? I'd run at least 2 even if you don't think that you will use > it in the future. The cost of conduit is minimal compared to the cost of > trenching. Conduits (especially when built with 10 ft sections) can easily > become blocked. The conduit that has been ordered is 2" PVC DUCT in 10ft sections that will need to be glued together. I was trying to look into the roll-style conduit but was not successful in finding it from the suppliers I contacted. I know the PVC DUCT is probably not ideal, but its whats been ordered and delivered. The project is on a private campus for a small non-profit; the network requirements are quite basic (a few users and network services at each building) and there will only ever be at most a few lines running through the conduit. While there is the possibility of running a spare conduit line now, I'm not sure its necessary on many of the big runs we're making because there's little anticipated need. However, around the site where many buildings are planned, there's several extra conduits being laid (electrical, telecom and plumbing) - we don't want to have to mess around in these areas again if we don't have to! Hopefully the PVC DUCT conduit will remain in good shape for future use though and not get blocked. > > 800ft is not a long run at all. Unless there is a really good reason for > pull boxes or flush-to-grade enclosures I would just do it in one long shot. > Reasons for putting a pull box in would be multiple bends greater than 90 > degrees, or possibility of splicing (teeing off) to another building in the > future. > The two runs of 600-800 feet don't have any future need to splice of, so it's nice to know that a pull box won't be needed. The runs are fairly straight with some minor curves, however at the ends of the conduit runs we're planning to have 90 degree elbows that will run into a wall box. I'm thinking the boxes could be mounted about with the bottom at about 4ft to allow easy pulling - but will the fiber pull ok when pulling from the 90 degree angle on both ends? > > Are the buildings on the same property? If not, there may be permitting > issues as well. > Fortunately all of the buildings are on the same private site > > Regards, > Bill > > ----- Original Message ----- From: "Steven McCann" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, November 23, 2008 3:06 PM > Subject: [on-asterisk] Underground conduit design (for fiber optics) help > > > > Hello, >> >> I'm running some conduit between buildings (to later install fiber) and >> there's a few items I'm not sure about. Does anyone have any knowledge or >> experience with running conduit underground? Here's a few specifics of the >> plan: >> >> -we're using 2" PVC DUCT conduit >> -the buildings we are connection are around 600-800ft apart. The plan is >> to >> put a pull station every 300ft or so. The runs are fairly straight. >> -we're burying the conduit about 36", so its below the frost line >> -considering using underground pulling boxes in the middle of runs and >> wall/post mounted enclosures at buildings (which will also store slack >> fiber) >> >> There's a few details I'm not sure about: >> -what type of boxes are available to mount outside buildings where the >> conduit comes up to - the conduit is going to be used to run >> indoor/outdoor >> fiber. I would like to have maybe 50ft or so excess fiber coiled up >> outside >> the building in the box where the conduit comes up out of the ground >> -any specifics on mounting the box on buildings to allow easy pulling >> -suggestions for methods to setup pulling stations in the ground to allow >> easy pulling and excess fiber storage. >> >> I can sketch out the site plan and other plans if it would be helpful. >> >> Thanks, >> Steven >> >> --- >> cell: 416-618-1354 >> >> > Thanks again, Steven
