One row for each size:
size, grade, number (of that size), total length, mass, surface area
One row for each size & length:
size, grade, number (of that size & length), length, mass, surface area
One row for each wall:
reference, gross mass, mass, gross surface area, surface area, volume
One row for each slab:
level, slab, depth, grade, mass, gross surface area, net surface area, volume
One row for each slab item:
One row for each pile type:
reference, dimension, shape, installation type, installation length, number, total length