What is equivalent axle load?
What is equivalent axle load?
Equivalent axle load factor: An equivalent axle load factor (EALF) defines the damage per pass to a pavement by the type of axle relative to the damage per pass of a standard axle load.
What is equivalent wheel load factor?
Equivalent Wheel Load Factor = (given wheel load/standard wheel load)4 = ( given axle load/standard axle load)4 i.e. EWLF = (P1/P)4 • McLeod assumes that the pavement thickness which are designed for a given wheel load would support one million repetitions of such load during the life of pavement.
How do you calculate Esal factor?
Annual ESALs are computed by multiplying the daily ESAL by 300 for low-volume roads or 365 for high-volume roads. Compute the 20-year ESAL by multiplying the annual ESALs by 20. This number is then input into pavement design calculations.
What is equivalent standard axle?
A Equivalent Standard Axle is defined as a Dual Tyred Single Axle transmitting a load of 80kN (or 8.2 tonne) to the pavement.
How do you find the equivalent load factor?
The equation outputs are load equivalency factors (LEFs) or ESAL factors….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.
- Using the fourth power rule-of-thumb:
What is maximum axle load?
As per the notification issued by the Road Transport and Highways Ministry, the maximum safe axle weight in the vehicle of single axle with two tyres has been changed from 7.5 tonnes to 7 tonnes.
How do you determine axle load capacity?
To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that will list the weight capacity.
What is maximum axle weight?
20,000 pounds
General Rule. 35550. (a) The gross weight on any one axle shall not exceed 20,000 pounds, and the gross weight upon any one wheel, or wheels, supporting one end of an axle, shall not exceed 10,500 pounds.
What is axle weight?
axle weight means in relation to an axle of a vehicle the total weight transmitted by the several wheels attached to that axle to the surface on which the vehicle rests; Sample 1. Sample 2.
How do I determine my axle weight?
What is the equivalent weight of a single axle load?
The most commonly used equivalent load in the U.S. is the 18,000 lb (80 kN) equivalent single axle load (normally designated ESAL).
What are load equivalency factors (lefs)?
The equation outputs are load equivalency factors (LEFs) or ESAL factors. This factor relates various axle load combinations to the standard 80 kN (18,000 lbs) single axle load.
What is the power of four for a single axle?
Therefore, as a rule-of-thumb, the damage caused by a particular load is roughly related to the load by a power of four (for reasonably strong pavement surfaces). For example, given a flexible pavement with SN = 3.0 and p t = 2.5: A 18,000 lb (80 kN) single axle, LEF =1.0 A 30,000 lb (133 kN) single axle, LEF = 7.9
How difficult is it to determine a wheel/axle load?
Although it is not too difficult to determine a wheel or an axle load for an individual vehicle, it becomes quite complicated to determine the number and types of wheel/axle loads that a particular pavement will be subject to over its design life.
