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-   -   Steel Jerk Boxes at Catalyst (http://www.catalystathletics.com/forum/showthread.php?t=6984)

kevin michael 03-17-2013 12:47 PM

Steel Jerk Boxes at Catalyst
 
What kind of support structure/design is under the rubber mat on the top of the steel jerk boxes? Any photos of the underside would be appreciated. Thanks.

Aimee Anaya Everett 05-04-2013 10:43 PM

It is metal cross beams, covered with a layer of plywood, and then rubber.
Pictures can be found on Greg's facebook page HERE:
https://www.facebook.com/media/set/?...28545&type= 3


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