# Concrete quantity estimate
# Scope: Rectangular slab net volume and supplied waste fraction.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

length = 5 m
width = 4 m
thickness = 0.15 m
waste = 0.05

net := length*width*thickness [m^3]
order := net*(1+waste) [m^3]

check order budget: order <= 3.5 m^3

scenario alternative: length = 4 m