Re: Stewart's 1955 Packard 400

Posted by HH56 On 2015/5/3 21:13:39

With the frame on jack stands, I still wonder if you bolted the chain to the floor, (or ratchet strap the frame down), then used the jack to move the arm in place, if that would be safer.

It probably would be if you had something substantial embedded in the floor you could hook to -- like a J bolt poured into the concrete or the like. I am not sure I would trust ordinary expansion anchors of the type typically sold at the hardware store unless they were installed and then pull tested before trying to lift the arm.

When we installed anchoring for our equipment the bolts had to be pull tested and certified. it is surprising how a slight deviation of the hole size or depth of embedment would result in a failure letting the anchors pull out well below their rating. If that anchor pulled out when trying to keep a frame on the floor while lifting that massive load I would expect it would be a case of Packards flying and hopefully no one was in the way.