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Old 07-20-2010, 02:29 PM   #2
Joe MacGregor
Member Joe MacGregor is offline
Join Date: Jan 2008
Location: Seattle  WA
Posts: 7
Re: Noob checking in/ Building home gym stuff

Hi Sean,

I just built a 8'x'10' setup similar to what you described, and I lag screwed the R3 to 2 x 3/4" plywood sheets directly, with no rubber in between. It works fine so far, with just a little swaying of the rack during aggressive kipping. The alternative (fastening through the mats) sounds less ideal because the rubber has some give, but seems acceptable.

The reason I fastened to two sheets rather than three (the total platform thickness) is that my ceiling is low, and I needed all the vertical clearance I could get to make use of the pull-up bars. In this way, the base plates are slightly recessed relative to the third layer of the platform, which is fine. Depending on the existing configuration of your third layer, you could cut the wood/rubber and do the same, skipping fastening to the rubber.

Also, Home Depot didn't have short enough 1/2" lag screws for my setup, so I had to go to a local fastener store. The thread typically doesn't go all the way to the head of the screw, so you probably won't be fastened to much rubber if you go that route...a good thing.

Hope that helps,

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