Spacecraft . foundation pads

assembly of dry stone aggregate foundation pad with recycled car tires and concrete cap
assembly of foundation pad, post-excavation; dry stone aggregate fill inside recycled car tire stack with concrete cap
dig a hole 1x1x1 meters volume below-grade; do not eat food next to excavation if contaminated site like Agbogbloshie
stack recycled car tires with side walls cut out and dry stone aggregate infill, incremental backfill with site material
one trip of 5/8in granite stone aggregate used for foundation pads plus site fill