I have a 10' x 12' shed that needs to get higher up off the ground. It's heavy, being both insulated and having a tall peaked roof. Water puddles around this flat property and the shed is valuable to me for storage, and don't want everything soaked. I've had a helper with a tractor and a helper with an excavator back out on me, and now the ground is wet and soft so that's it till next summer when it dries for equipment. This is going to be difficult to explain, bear with me..... I lucked into two 16' long 10x12" beams to put it up on. I 'think' I could slide them basically into place with a chain and my truck. Well assuming I can... When I originally built the shed I couldn't find any 4x4's to put it up on (as skids) long enough for lengthwise, but found some for widthwise(?) so basically there are eight 4x4's under it widthwise, and they are screwed on. These 16 footers would crisscross those, going legthwise. I'm afraid if I put a jack under one of these 4x4's and start lifting then the shed will pop apart. Can anyone give me an idea on how to safely do something like this? I don't want to lose the shed! I have a heavy duty jack (which I've never used yet) so I could lift it but not sure how. Would you dig under the building for jack access, then put in a cinderblock so that the jack doesn't sink, then just pump it up? Deng it I htink I'd need two jacks. I'll stop writing, if you need more info just let me know. Thanks!!!