# Retaining-wall load screening
# Scope: Rankine active dry level cohesionless soil; resultant only, no wall design.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

height = 2 m
density = 1800 kg/m^3
frictionAngle = 30 deg
gravity = 9.81 m/s^2

coefficient := (1-sin(frictionAngle))/(1+sin(frictionAngle))
forcePerLength := coefficient*density*gravity*height^2/2 [N/m]

check resultant load budget: forcePerLength <= 15000 N/m

scenario alternative: height = 1.6 m