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Crem, I dropped two of them in my shop addition earlier this spring, and they work great. I�m sure the �store bought� ones are nice, but a little spendy for me. Before the pour, I laid in a piece of 3� angle iron which spanned from one tie down to the other. I�m sure a coupla 3� sections would work fine also. At each location, I wrapped a piece of HEALTHY logging chain about 24 inches long around the angle and bolted it to itself ( like the letter J) with a grade 8 bolt. After figuring out where my finished shop floor would end up, I cut a piece of 6� PVC (DWV) to slip over the chains and end up � inch below the finished concrete grade. Cut a �V� notch in the bottom of the vertical pipe and it will stand up just fine. When time came for the pour, I taped a piece of 8� x 8� x � steel plate with a 1� finger hole to the top of each PVC section. Pack newspaper above and below the chain to keep concrete from flowing up and filling the tube. Finish the concrete the same as usual, and remove the plates during finish troweling. It doesn�t hurt to spray the underside of the steel with PAM first. I had the angle, chain, steel plate and PVC in stock so my out-of-pocket was zero. Finish product looks great and my carts and creepers roll right over the steel without a hitch. My nickels worth, Scott
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