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Clever Construction System: Build the Roof on the Ground, Then Lift It
This is awesome. I worked construction for a few years and I remember a few times walking along rafters and ceiling joists 12' off a concrete slab. Just a tad sketchy, but not as sketchy as standing on a box on a 2x12 stretched between scaffolding while hanging HVAC.
30 years ago I worked for a small job carpenter building car-ports & pergolas etc. He always used to build the roof first - often a fairly flat structure. Given the size of the jobs - and often without roof cladding, we could lift them by hand and hold up using wooden beams as props. The legs would then be attached and hang into holes (that I dug) which could be filled with concrete.
I haven't seen any other builders use the technique but it was very effective for a small team and for small jobs.
I'm not sure, but I thought this is similar to how traditional Japanese houses were build..
And if so, when the technic is the same, how can you patent it?