Model of Foundations with Cross-Piling

Sketchy patent model of the cross-section of a ground plot with cross-piling. A part can be removed to reveal the piles. The piles are flat planks driven into the ground at a 45° angle. The long poles have pointed ends and all lie in the same direction. The short poles are driven in the opposite direction until they meet the long poles at a right angle; at the end they have two points that penetrate the long poles and prevent shifting. The heads of the piles are connected by a lattice of planks lying on the ground, connecting both the piles of one row and the rows of piles to each other.