Dump Truck Governing Payload and Load Count
Whether the box volume or the legal weight limit fills the truck first, and the load count: weight-limited volume = weight limit / density; payload = min(weight-limited, box); loads = ceil(total / payload). 625 loose cy in 12 cy boxes is 53 loads when the box governs, but haul wet 3,600 lb/cy material and the 40,000 lb limit caps each truck at 11 cy - 57 loads. Weight governs heavy material, volume governs light; pairs with haul-cycle-production.
Formula and source
weight_limited_cy = weight_limit_lb / material_density_lb_per_lcy; payload_cy = min(weight_limited_cy, box_vol_cy); loads = ceil(total_lcy / payload_cy).
Governing-payload identity by name (weight-limited volume vs box; loads from total / payload); first-principles min-constraint arithmetic.
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