Asymmetric Heavy-Machinery Rigging 3/4-Leg Bridle Sling Tension & Hook-Drift Solver

Deterministic 3D concurrent force equilibrium ∑ F_i·u_i = [0, 0, W]^T with hook plumbing directly above CoG (x_cog, y_cog, z_hook) & 4-leg rigid-body 2-leg load-bearing safety rule engine (.pdf, .dxf) built for Crosby, Pewag, Yale, Liebherr — zero-upload ephemeral Wasm RAM execution.