Pavement Marking Paint and Glass Bead Quantity
Paint and glass beads for a pavement-marking run: stripe area = length x width / 12; gallons = area / coverage (sf/gal); beads = gallons x rate (lb/gal). A mile of 4-in line is 1,760 sf - 5.5 gal of paint and 33 lb of beads; a 6-in edge line takes 8.25 gal and 49.5 lb. The coverage follows the wet-mil thickness and the bead rate the retroreflectivity spec. Distinct from architectural paint-coverage.
Formula and source
stripe_sf = length_ft x width_in / 12; paint_gal = stripe_sf / coverage_sf_per_gal; beads_lb = paint_gal x bead_rate_lb_per_gal.
Pavement-marking quantity identity by name (area from length x width; gallons from area / coverage; beads from gallons x rate); first-principles arithmetic.
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