How Many Tons of Asphalt for a 12 by 30 Driveway?

Thirty feet of twelve-foot drive is 360 square feet. Plan about 4.4 tons at two inches and about 6.5 tons at three inches, using 145 pounds per cubic foot. Those are planning estimates. The plant ticket is the real weight.

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Six extra feet beyond a shorter lane

A twelve-foot width held for thirty feet is a single-lane drive, longer than a 12 by 24 pad and still narrow. Twelve times 30 is 360 square feet. The ton formula is 360 times inches times 145, divided by 24,000. At two inches the product is 104,400 divided by 24,000, which is 4.35, about 4.4 tons. At three inches it is 156,600 divided by 24,000, which is 6.525, about 6.5 tons. Compared with a 12 by 24 rectangle, the extra six feet of length are 72 square feet. At three inches those 72 square feet are 72 times 3 times 145 divided by 24,000, about 1.3 tons. That is why a slightly longer tape changes the order. Both depths are planning estimates. The plant ticket is the real weight.

Narrow length means more edge per ton

Two edges run the whole thirty feet. On a twelve-foot drive the paver may fit, or it may not, and the sides are often finished by rake. Rake work tends to finish thicker than the screed setting, so the ticket can beat 4.4 or 6.5 even when the rectangle is right. A flare at the curb is not inside the 360. Average the flare widths, multiply by the flare length, and add that area. Five percent of 6.5 is about 0.3 ton, a small cushion next to a forgotten flare. The base stone is separate, often planned near 1.4 tons per cubic yard, and the quarry ticket is the real weight for the gravel. Do not bury those stone tons inside the asphalt figure.

Match the thickness to the cars, then stop

Two inches and three inches are planning choices, not a code pair. Passenger cars on a sound base are a different conversation from a truck that uses the lane every day. Once you pick a depth, stay with it. Do not average 4.4 and 6.5 into a fake order. If the drive continues past thirty feet to a rear garage, measure the real length. Forty feet at twelve feet wide is 480 square feet, about 8.7 tons at three inches, which is no longer this article's rectangle. Ask the plant whether about 4.4 tons meets their minimum load. Then keep the scale ticket and compare it with the area you actually paved, including any flare.

A practical sequence

Multiply 12 by 30 to get 360 square feet.
Plan about 4.4 tons at two inches or about 6.5 tons at three inches.
Add any flare, and expect raked edges to run a little thick.
Treat the tons as a planning estimate and read the real weight on the plant ticket.

The mistake to skip

Using the 12 by 24 tonnage on a drive that is actually thirty feet long.

Questions people ask

How many tons is a 12 by 30 driveway at three inches?

About 6.5 tons. The area is 360 square feet, and 360 times 3 times 145 divided by 24,000 equals 6.525. About 4.4 tons is the two-inch planning figure. Hand work and a flare can raise the load. The plant ticket is the real weight.

How much does the extra length add versus 12 by 24?

Six extra feet at a twelve-foot width is 72 square feet. At three inches that slice is about 1.3 tons, which is the gap between about 5.2 tons and about 6.5 tons. Measure the real length before you borrow the shorter driveway's number.

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