Coping on boxes

Its pretty much optional. If you do, most people use PVC. I've heard of mounting it flush, below, or above. I would say go for flush but air on the side of being raised, or plan for 1/16" above or something. If your using a thin top sheet I would recommend having something.

i dont think u need it but if you do mount it even.

ya i did it on mine and kind of fucked it up. i had a 1/2 in plexi (works great i dont care what anyone says) and so i thought hmm lets put on 1/2 diameter galvanized pipe on. but learn from my mistake i dont even touch the glass. does anyone have suggestions for me on how to fix it??

There are multiple styles for coping. Many people use pvc pipes, but I find that proper steel works much better. If you're willing to spend maybe like 5-10 bucks more per pipe, and put a bit more time and effort into it, use steel.

As for mounting height, either mount flush with the topsheet, or a fraction of an inch higher. The problem with higher is that when the metal is sticky, you don't slide. If you can get fairly precise, mount as flush as you can because if you use a good topsheet material (HDPE), it slides really well and is very dense.

As for styles of coping, some people i know have used pvc pipes, some have used metal pipes, and some have used angle iron. I would mostly reccomend metal pipes, simply because they will last longer. The point of coping is to stop your edges from digging into the plastic topsheet, so using pvc kindof defeats the purpose of coping because your edges can dig into the plastic. Angle iron is also a good bet because it sits in well with the box frame and is much easier to mount onto the box than a rounded pipe. It's up to you though.

take it off.

word

i dont use coping, and i have lexan on my box

if you use coping can you skip the topsheet?

if all you do spin o the bok its self

you dont need coping but if you dont have it use a thicker top sheet