[on-asterisk] Underground conduit design (for fiber optics) help

[Steven McCann]

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

[Bill Sandiford]

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.

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.

Are the buildings on the same property? If not, there may be permitting
issues as well.

Regards,
Bill

---------------------------------------------------------------------
To unsubscribe, e-mail: asterisk-u...@uc.org
For additional commands, e-mail: asteri...@uc.org