What size cable ties are typically used to secure slinky loops in place during installation? My loops will be 1" HDPE, 36" diameter, 18" pitch. The IGSHPA manual shows what looks like a .3" wide tie; is that enough or is a .5" wide tie better? Also is a 50 lb. rated tie enough or should I upgrade to 120 lb. or higher? My concerns are indenting the pipe at the ties, and breaking of the ties as I'm moving the slinkies into the trenches.
We use double looped wire ties typically used in the concrete industry for tying rebar. We buy ours from Bedford Industries 1-877-233-3673. We use 16 gauge 8" ties. Using the twist tools is way faster than zip ties! Good luck!
I have had bad luck with the steel rebar ties.
I have had a few rub through leaks with the small wire size and the expansion and contraction of the HDPE pipe in lake loops which is the only place I used them.
I have stuck with the plastic zip ties , 3/16 x 11 and they work great. Not one break in the last slinky install. Only one or two in 100's of previous installs.
The key is to zip tie EVERY overlap of the pipe.
Used over 2500 zip ties, at every intersection or overlap on 5 – 500 ft. slinky's with no broken ties. We fabricated the slinky, rolled them up, transported them, unrolled them, and pulled them into the trench.
The plastic ties will move with the pipe and not dig in and chafe or cut through the pipe years later. All you need them to do is hold until backfilled if buried.
For a pond or lake loop, use the heavy duty ties made for ductwork to fasten everything to the sled structure.
Luckily, the leaky slinky was a pond loop so we could find the leak easily. We changed out all of the wire rebar ties and replaced with plastic zip ties.
Been doing this since 1985.
D. Michael Dowdall, P.E.
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We have been using standard 3/16" wide by 11" long zip ties with 50 Lbs. tensile strength. With 1" loops they have about a 3" tail. during the winter we will have a few break if we are moving the slinky loop to much but during spring/summer/fall installations typically no more than 1 out of about 1,000 breaks. Cable Ties - 50 lb. Standard Spec Sheet
Thanks very much for all the replies. It looks like plastic ties are the way to go; they take longer to install and are harder on the laborer's hands, but are unlikely to wear holes in my loops.
Appreciate everyone's input.
Don't buy the ties from home depot unless it is summer time. They break when it's cold out
to help you with the wear and tear on your workers hands, I recommend one of two things. 1. Athletic take over the two knuckles on your index finger. and 2. They make zip tie pullers/cutters.
Here is a picture of the style one I use from time to time when my fingers start to get raw.
Hope that helps!