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Boxes - Height of Coping over Topsheet - What do you use?

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howeezy
Posts: 48 - Karma: 10

hey ns,

im building a box with a HDPE topsheet and steel pipes as coping.

its my first time actually putting coping on a box and im not too sure how much height the coping should be over the topsheet....

my buddies are telling me to make it level but i think it needs to be higher than the topsheet, i was thinkin somehwere around 1/16" (.0625, ~1.5mm) is good

Click for larger image

heres a pict of the dimension thats in question....

what height have you guys used for your boxes? +karma for answers

i'll share my design (with tech drawings!) with you guys after im done building it... just the deck to slide on though, you guys can figure out how to frame and support it.

Jan 27 2009 7:01PM
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Spillway_East
Posts: 1127 - Karma: 378
i think even because then your skis wouldnt even be touching the box, and i know they normally do
Jan 27 2009 9:43PM
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howeezy
Posts: 48 - Karma: 10

parker... you mean make em level with each other (same height, dimension=zero)?

yah i was thinkin some height difference would be ok since skis flex down in the middle. 

Jan 27 2009 10:16PM
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jmason
Posts: 1595 - Karma: 136
Make them even. The skis aren't meant to slide on the coping. What coping is meant for is so that if your skis come up to the box at an angle (think of how one might jump on to a box/rail urban-style) that you don't chip and destroy the side of the box. That's all it's meant for.

Make them level. That's your answer.
Mar 9 2009 8:14PM
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dandougherty
Posts: 1002 - Karma: 2,619
i would make them slightly higher.  that way it will protect and put less wear and tear on the top sheet of the box.  everything ive ever built is always a little higher.
Mar 31 2009 2:58PM
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Aaaron.
Posts: 11817 - Karma: 903
how much higher?
Apr 9 2009 12:44PM
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PeterWojnar
Posts: 3937 - Karma: 678
not more than 1/16th.  You should be fine doing it flat, the coping is just there to protect the HDPE, as has been said before.
Apr 12 2009 1:21PM
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