Interestingly, the action of the pump, which was now embedded in concrete, created a vertical compression wave. This, according to Cadman, meant that the Great Pyramid’s subterranean ram pump also had an acoustical element. So, he built two more models to study the acoustics...
it's essential to avoid horizontal cold joints between the footings and the slab. Most residential slabs can easily be poured monolithically, but for larger slabs it's sometimes necessary to use vertical construction
If you can’t find natural shelter, use your pickaxe to dig a 2-block-high shelter into a vertical surface (like a rock face or cave).[4] Alternatively, carry enough blocks around to create an impromptu shelter if needed! Simply stack 3 blocks vertically, then create a “roof” for ...