Duct can be had for 35 cents / foot or less. I was getting it for 28 cents
until the extrusion company went BK.
You can cut and splice duct when going over and under obstacles. If doing
direct burial you would be doing giant figure 8s or cutting and splicing every
time you hit a culvert or other shallow facility.
You can blow another fiber over the top of an existing fiber.
Fewer fiber cuts and splices etc. In my opinion you don’t save that much money
with direct burial.
From: Chris Fabien
Sent: Saturday, December 22, 2018 10:53 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] 10 mile fiber
I know we've had this discussion before.... we don't have gophers in Michigan.
Only damage we have had on direct bury was due to gas company. Yeah it was a
pain to fix, about 8 hours of downtime. But the cost savings is worth it to me
for my network. We are doing FTTH so we do have more handholes for test points.
Usually at least 6 per mile. Don't know where Steve is or how well funded so
just sharing a lower cost option, I guess.
On Sat, Dec 22, 2018, 12:15 PM Chuck McCown <ch...@wbmfg.com wrote:
The worst part of direct burial is gopher damage. And they will eat it up on
100 places but they may not fail until there is some nearby vibration. They
seem to have the ability to eat up the cable but leave the strands intact or
just break one or two of them.
Yes, you first have to find the damage and in long rural stretches that can
be difficult, more so with direct because you have to dig, cut, test, dig cut
test. With duct you just pull on it and see if it moves. OTDRs are not
precision measuring devices. Even if they are +-1% accurate, that is 52 feet
of uncertainty in a mile. So you shoot both ends and then extrapolate the
center of overlap or gap.
Pray, dig, cut, test, splice, pray, dig, cuts, test, splice. Repeat until
you get there. After some time you will have it bracketed and many times you
just replace 1000’ instead of actually finding and fixing the problem.
All the while customers are very unhappy. I have had it take a week to fix
very long remote troubles like this.
From: Colin Stanners
Sent: Saturday, December 22, 2018 9:56 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] 10 mile fiber
We also usually install a second duct on all major routes.
Chuck, with your long career, I assume that you've had a few cases where
direct burial took a long time/difficulties to fix?
Now working in the long-distance/underground industry, doing all the planning
and permitting, I've seen our guys pull up things - including a boulder the
size of a car - from the ground so that they could get that conduit through.
On Sat, Dec 22, 2018 at 10:48 AM Chuck McCown <ch...@wbmfg.com> wrote:
I never do direct burial any more. Not even on drops. Generally I install
an extra duct, I like duralines future path products if I can justify the
expense. I need to learn how to install microduct into regular duct. I am
sure I can pull it but I would like to figure out how to blow it.
From: Colin Stanners
Sent: Saturday, December 22, 2018 9:42 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] 10 mile fiber
I try hard to steer clear of direct-burying cable, which is much easier to
damage and extremely time-consuming to repair, unless it's a non-crucial line
(e.g. standard residential customer, although those we currently put in conduit
as well, to keep future risk and repair costs low).
If this customer is paying 1/4 million to get a line installed, it's
probably crucial. One day when that line gets hit, if it's in conduit it's
likely possible to get it repaired within hours to a day. I've even heard of
cases of the fiber surviving a conduit-line hit since it's "loose" inside the
conduit and has slack at the ends. If a direct-buried line gets hit, especially
next to a road etc, it may be needed to get locates, arrange a drill,
electrical/gas line safety watch, etc, possibly even arrange more permitting
for a new vault, which will often move time to repair to days or a week+.
On Sat, Dec 22, 2018 at 9:28 AM Chris Fabien <ch...@lakenetmi.com> wrote:
Steve in our area we could do that "on the cheap" with 12 or 24 count
cable direct buried for around 100k. There are so many variables though. You
really need someone who has done work in that area and is familiar with
permitting costs and requirements. I'd it's so rural that you can plow the bulk
of it and you are OK with direct bury you can save a ton of money vs putting it
all in duct.
Personally I run at least 24 strands on any run that's going "somewhere".
Dead end runs can be 12F.
On Sat, Dec 22, 2018, 1:46 AM Steve Jones <thatoneguyst...@gmail.com
wrote:
If a guy wanted to get fiber in the ground, non aerial between two
buildings to replace an existing licensed 1.3 gb link. Crosses 3 creek/ditches,
10 rural intersections, 10 rural town blocks. What would be needed?
I would guess that duct is the best thing to put it in, innerduct being
better.
I'd guess 96+ count isn't going to cost any more per strand to put in
the duct than 2 (not the cost of the fiber itself)
Lots of dark strands and duct space is probably lucrative to have just
in case.
Slack, handholes, vaults, etc, what would you put in there? 10 or so
customers on the path so not a ftth type thing.
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