Steelscape Chemical-Theoretical Minimum Weight

Steelscape provides ZINCALUME^® and TruZinc^® Steel products on both an actual weight and TMW (theoretical minimum weight) basis. Many of our customers sell their products on a lineal footage basis and it makes sense to purchase the same way. TMW pricing permits customers to pay for the lineal feet of coated steel in a particular coil (or order). If the steel is slightly thicker than the minimum dimensions ordered customers do not pay for the excess.

Customers are charged only for the lineal feet received. There is a small extra charge for the added feature of TMW pricing and customers should contact their Sales Representative for details.

For customers buying and selling steel on an actual weight basis our standard pricing uses the actual weight of each coil (or order) to calculate the invoiced price. Steelscape calculates the price of TMW products as follows:

TruZinc^® Steel
rst = density of steel and zinc coating = 0.2833 lb/in³
c = ordered width of steel (inches)
t = ordered thickness of steel (inches)
d = actual lineal feet of steel (feet)

Theoretical Minimum Weight (lb) = rst • c • t • d • 12

example: ordered width = 48", ordered thickness = 0.019", actual lineal feet in coil = 5,500 \TMW = 0.2833 • 48 • 0.019 • 5500 • 12 = 17,052.4 lb

ZINCALUME^® Steel
rst = density of steel = 0.2833 lb/in³
rznal = density of zinc-aluminum coating = 0.1335 lb/in³
b = thickness of ZINCALUME coating = 0.0016"
c = ordered width of steel (inches)
t = ordered thickness of steel (inches)
d = actual lineal feet of steel (feet)

Theoretical Minimum Weight (lbs) =
[rst • (t - 0.0016) + rznal • 0.0016] • c • d • 12

example: ordered width = 48", ordered thickness = 0.019", actual lineal feet in coil = 5,500 \TMW = [0.2833 • (0.019 - 0.0016) + 0.0016 • 0.1335] • 48 • 5500 • 12 = 16,283 lb