How Many Tons of Asphalt Does a Three-Car Driveway Need?

Three doors are often about 30 feet wide, and that width is where orders fall short. A 30 by 36 pad is 1,080 square feet, about 19.6 tons at three inches. A 30 by 20 apron is 600 square feet, about 10.9 tons. Ask which shape you have.

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Width is the jump

Three-car usually means the pavement gets wide, not that you multiply a one-car tonnage by three. Three doors are often about 30 feet wide. If the drive is a pad 30 by 36, the area is 1,080 square feet. At three inches, 1,080 times 3 times 145 divided by 24,000 equals 469,800 divided by 24,000, which is 19.575, about 19.6 tons. If it is only a 30 by 20 apron in front of the garage, the area is 600 square feet, and 600 times 3 times 145 divided by 24,000 is 10.875, about 10.9 tons. The same width, two very different lengths, and almost a factor of two in the tons. These are planning estimates at 145 pounds per cubic foot. The plant ticket is the real weight.

Ask which shape is on the ground

The question to settle is whether you have a wide apron or a long lane plus a wide end. A lane that is 12 feet wide for 40 feet, then a 30 by 20 apron, is not the 1,080 square foot pad. The lane is 480 square feet, about 8.7 tons at three inches, and the apron is about 10.9, but the shared overlap where the lane meets the apron must be subtracted once. Draw the two rectangles and hatch the corner. People under-order three-car work by pricing the apron and then paving the lane from memory. A flare at the street is another trapezoid. Average its widths. Do not assume 30 feet of width continues to the curb unless the tape says so.

The tons move with every foot of width

One extra foot of width along 36 feet is 36 square feet, and 36 times 3 times 145 divided by 24,000 is about 0.7 ton. Three doors that are really 32 feet wide are not a 30-foot plan. Measure the door wall. Two inches instead of three inches would be two-thirds of 19.6, about 13.1 tons on the 1,080 square foot pad, and that is a different section. Neither depth is a code rule. Base stone is separate, near 1.4 tons per cubic yard, with the quarry ticket as the real gravel weight. An open wide pad can track the paver formula, and the door-side edge is still often placed by hand. Compare tickets with the net area after you have subtracted overlaps.

A practical sequence

Decide whether the drive is a wide pad or a lane plus a wide end.
Use about 19.6 tons for a 30 by 36 at three inches, or about 10.9 for a 30 by 20.
Subtract any shared corner once, and add a flare as its own area.
Treat the tons as a planning estimate and confirm them on the plant ticket.

The mistake to skip

Ordering a two-car quantity for a three-door width because the length looked familiar.

Questions people ask

How many tons is a 30 by 36 three-car pad?

About 19.6 tons at three inches. Thirty times 36 is 1,080 square feet, and 1,080 times 3 times 145 divided by 24,000 equals 19.575. A shorter 30 by 20 apron is about 10.9 tons at the same depth. Both are planning estimates. The plant ticket is the real weight.

Should I triple a single-car order?

No. Tripling a 10-foot lane does not describe a 30-foot apron, and it ignores length. Measure the width at the doors and the length you will actually pave. Convert that area. The car count is only a hint that the width jumped.

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