What is the standard value of equivalent single axle load?
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What is the standard value of equivalent single axle load?
18,000-pound
ESAL Defined: One ESAL represents the loading that produces an amount of damage to the pavement structure equivalent to one pass of a single 18,000-pound, dual-tire axle with all four tires inflated to 110 psi.
What is the weight of an equivalent single axle load Esal )?
Pavement engineers generally use the concept of an equivalent single-axle load (ESAL) to measure the effects of axle loads on pavement. By convention, an 18,000-pound single axle is 1.00 ESAL. The ESAL values for other axles express their effect on pavement wear relative to the 18,000-pound single axle.
How do you calculate Esal on a truck axle?
Compute the number of ESALs per day by multiplying the number of trucks in the design year by the ESAL factor. For our example, if the appropriate ESAL factor is 0.50, the number of ESALs per day is: 200 trucks per day x 0.50, which equals 100 ESALs per day.
What does Esal mean?
equivalent single axle load
ESAL is the acronym for equivalent single axle load. ESAL is a concept developed from data collected at the American Association of State Highway Officials (AASHO) Road Test to establish a damage relationship for comparing the effects of axles carrying different loads.
What is equivalent axle load?
The equivalent axle load factor (EALF) defines the damage per pass to a pavement in relation to the damage caused by a standard axle load (8.2 tonne). The EALF depends on the type, thickness and composition of the pavement.
How is single axle load calculated?
For example, given a flexible pavement with SN = 3.0 and pt = 2.5: A 18,000 lb (80 kN) single axle, LEF =1.0. A 30,000 lb (133 kN) single axle, LEF = 7.9. Comparing the two, the ratio is: 7.9/1.0 = 7.9.
How do you calculate equivalent single wheel load?
it can be also be determined from pavement distress and performance such as the large , scale WASHO and AASHO road test. The ESWL = Pd/2 (indicating that the subgrade vertical stresses caused by two wheels do not overlap). where Pd=the total load on the dual tire.
What is equivalent axle load factor?
