Winter Haven Parking Lot Paving: Thickness Design of Parking Lots

The thickness of the design of the Winter Haven parking lot paving depends on the volume and the type of traffic that will use the parking lot. That is heavily impacted by the load-supporting capability of the base soil and the surface of the pavement. In many cases, there should be special thickness design on areas of the parking lot that will be used by trucks and other heavy machinery. Most trash dumpster sites and equipment areas have different requirements when it comes to the thickness of the pavement.

Drainage problems are another major cause of concern for the design of a Winter Haven parking lot paving. The design of the drainage system should be considered before choosing the “right” thickness of the asphalt pavement.

Traffic Class I (Less Than 50 Parking Slots)

For asphalt concrete base pavements, the subgrade is classified as good, moderate, and poor. When good, the thickness in asphalt concrete should be 4 inches (3 inches base and 1-inch surface). When moderate, it should be 4.5 inches (the base at 3.5 inches and the surface with 1 inch). When classified as poor, the thickness of the asphalt should be 5 inches (4 inches base and 1-inch surface).

For untreated aggregate base pavements, good and moderate subgrades should have a total of 7 inches (4 inches untreated aggregate base and 3 inches surface) in asphalt thickness. For poor subgrade, the total should be 9 inches (6 inches untreated aggregate base and 3 inches surface).

Traffic Class II (50 or More Parking Slots)

For asphalt concrete base pavements, good subgrade needs a total of 4 inches (3 inches base and 1 inch surface) of hot mix asphalt. For moderate, the total should be 5 inches (3.5 inches base and 1.5 inches surface). For poor subgrade, the required total is 6 inches (4.5 inches base and 1.5 inches surface).

For untreated aggregate base pavements, good subgrade should have 7 inches (4 inches base and 3 inches surface) in asphalt thickness. For moderate, the required number is 9.5 inches (6 inches base and 3.5 inches surface). For poor subgrade, it should be 11.5 inches (8 inches base and 3.5 inches surface).

Traffic Class III (500 or More Parking Slots)

For asphalt concrete base pavements, good subgrade needs a total of 5 inches (3.5 inches base and 1.5 inches surface) of hot mix asphalt. For moderate, the requirement is 6 inches (4.5 inches base and 1.5 inches surface). For poor, it goes up to 7 inches (5.5 inches base and 1.5 inches surface).

For untreated aggregate base pavements, good subgrade should have a total of 9 inches (6 inches base and 3 inches surface) of asphalt thickness. For moderate, it should be 11.5 inches (8 inches base and 3.5 inches surface). And for poor subgrade, the requirement is 12 inches (8 inches base and 4 inches surface).

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