New answers tagged demolition
just go rent or buy a demolition hammer with a concrete chisel. they are small enough to not make too much vibration to damage whats below, but large enough and enough power that you dont turn a 20 minute job into a 20 day job. hitachi dh40fa is the best one i have used, but they dont make it anymore. anything like this will work: ...
I just cut down a 4" steel basketball pole at my daughters house. I used my 4" side grinder. If it takes you over 15 minutes I would be surprised. Any brand of grinder would be fine. Odds are that is carbon steel, not cast iron. Good luck. Try this method first.
A circular saw can be used to plunge cut into flooring cut out sections for repair/access. I don't see how this would be any different. Just make sure you adjust the blade depth for the width of the plywood.so that you don't hit anything that might be under the shed (support beams/metal/concrete/small animals too stupid to move/etc).
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