Actual Thickness of Base Course given Structural Number Calculator

✖Structural Number for Base Course can be described as the ability of the base course to withstand the axle loads.ⓘ Structural Number for Base Course [SN₂]			+10% -10%
✖Layer Coefficient can be represents the strength of the material, this is the primary variable that factors in the type of material you plan to use for each layer.ⓘ Layer Coefficient [a_n]			+10% -10%
✖Drainage coefficient is a value assigned to a pavement layer that represents its relative loss of strength due to drainage characteristics and exposure to moisture saturation.ⓘ Drainage coefficient [M_n]			+10% -10%

✖Actual Thickness Base Course Payment can be described as the design thickness of various layers of the courses for flexible payments.ⓘ Actual Thickness of Base Course given Structural Number [T_a]

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Formula

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Actual Thickness of Base Course given Structural Number

Formula

`"T"_{"a"} = "SN"_{"2"}/("a"_{"n"}*"M"_{"n"})`

Example

`"1204mm"= "150.5mm"/("0.5"*"0.25")`

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Actual Thickness of Base Course given Structural Number Solution

STEP 0: Pre-Calculation Summary

Formula Used

Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient)
T_a = SN₂/(a_n*M_n)
This formula uses 4 Variables

Variables Used

Actual Thickness Base Course Payment - (Measured in Millimeter) - Actual Thickness Base Course Payment can be described as the design thickness of various layers of the courses for flexible payments.
Structural Number for Base Course - (Measured in Millimeter) - Structural Number for Base Course can be described as the ability of the base course to withstand the axle loads.
Layer Coefficient - Layer Coefficient can be represents the strength of the material, this is the primary variable that factors in the type of material you plan to use for each layer.
Drainage coefficient - Drainage coefficient is a value assigned to a pavement layer that represents its relative loss of strength due to drainage characteristics and exposure to moisture saturation.

STEP 1: Convert Input(s) to Base Unit

Structural Number for Base Course: 150.5 Millimeter --> 150.5 Millimeter No Conversion Required
Layer Coefficient: 0.5 --> No Conversion Required
Drainage coefficient: 0.25 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_a = SN₂/(a_n*M_n) --> 150.5/(0.5*0.25)

Evaluating ... ...

T_a = 1204

STEP 3: Convert Result to Output's Unit

1.204 Meter -->1204 Millimeter (Check conversion here)

FINAL ANSWER

1204 Millimeter <-- Actual Thickness Base Course Payment

(Calculation completed in 00.020 seconds)

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Created by M Naveen

National Institute of Technology (NIT), Warangal

M Naveen has created this Calculator and 500+ more calculators!

Verified by Himanshi Sharma

Bhilai Institute of Technology (BIT), Raipur

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< 12 Structural Numbers for Flexible Pavements Calculators

Structural Number to Withstand Anticipated Axle Loads

Go Structural Number = Structural Number for Surface Course+Structural Number for Base Course+Structural Number for Subbase Course

Drainage Coefficient of Subbase using Structural Number

Go Drainage coefficient = Structural Number for Subbase Course/ (Layer Coefficient*Actual Thickness Base Course Payment)

Layer Coefficient for Subbase Course using Structural Number

Go Layer Coefficient = Structural Number for Subbase Course/(Actual Thickness Base Course Payment*Drainage coefficient)

Actual Thickness of Subbase Course given Structural Number

Go Actual Thickness Base Course Payment = Structural Number for Subbase Course/(Layer Coefficient*Drainage coefficient)

Structural Number for Subbase Course

Go Structural Number for Subbase Course = (Layer Coefficient*Actual Thickness Base Course Payment*Drainage coefficient)

Drainage Coefficient for Base Course given Structural Number

Go Drainage coefficient = Structural Number for Base Course/ (Layer Coefficient*Actual Thickness Base Course Payment)

Layer Coefficient of Base Course given Structural Number

Go Layer Coefficient = Structural Number for Base Course/(Actual Thickness Base Course Payment*Drainage coefficient)

Actual Thickness of Base Course given Structural Number

Go Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient)

Structural Number for Base Course

Go Structural Number for Base Course = (Layer Coefficient*Actual Thickness Base Course Payment*Drainage coefficient)

Layer Coefficient of Surface Course using Structural Number

Go Layer Coefficient = (Structural Number for Surface Course/Actual Thickness)

Actual Thickness of Surface Course given Structural Number

Go Actual Thickness = (Structural Number for Surface Course/Layer Coefficient)

Structural Number for Surface Course

Go Structural Number for Surface Course = (Layer Coefficient*Actual Thickness)

Actual Thickness of Base Course given Structural Number Formula

Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient)
T_a = SN₂/(a_n*M_n)

What is structural number (SN)?

Structural Number (SN), which is an abstract value that expresses the structural strength of the overall pavement. The Structural Number (SN), formerly called a "thickness index”, was originally determined with help of the American Association of State Highway Officials (AASHO) road test of the late 1950s and early 1960s. It is used as an indicator to determine the strength of a total pavement structure.

What is the structural number SN of a flexible pavement?

One of the key questions in the structural design of an asphalt pavement is how thick each layer of the structure should be. During design, these thicknesses are related to the Structural Number (SN), which is an abstract value that expresses the structural strength of the overall pavement.

How to Calculate Actual Thickness of Base Course given Structural Number?

Actual Thickness of Base Course given Structural Number calculator uses Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient) to calculate the Actual Thickness Base Course Payment, Actual Thickness of Base Course given Structural Number represents the suitable design thicknesses for each of the pavement layers. Actual Thickness Base Course Payment is denoted by T_a symbol.

How to calculate Actual Thickness of Base Course given Structural Number using this online calculator? To use this online calculator for Actual Thickness of Base Course given Structural Number, enter Structural Number for Base Course (SN₂), Layer Coefficient (a_n) & Drainage coefficient (M_n) and hit the calculate button. Here is how the Actual Thickness of Base Course given Structural Number calculation can be explained with given input values -> 1.2E+6 = 0.1505/(0.5*0.25).

FAQ

What is Actual Thickness of Base Course given Structural Number?

Actual Thickness of Base Course given Structural Number represents the suitable design thicknesses for each of the pavement layers and is represented as T_a = SN₂/(a_n*M_n) or Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient). Structural Number for Base Course can be described as the ability of the base course to withstand the axle loads, Layer Coefficient can be represents the strength of the material, this is the primary variable that factors in the type of material you plan to use for each layer & Drainage coefficient is a value assigned to a pavement layer that represents its relative loss of strength due to drainage characteristics and exposure to moisture saturation.

How to calculate Actual Thickness of Base Course given Structural Number?

Actual Thickness of Base Course given Structural Number represents the suitable design thicknesses for each of the pavement layers is calculated using Actual Thickness Base Course Payment = Structural Number for Base Course/(Layer Coefficient*Drainage coefficient). To calculate Actual Thickness of Base Course given Structural Number, you need Structural Number for Base Course (SN₂), Layer Coefficient (a_n) & Drainage coefficient (M_n). With our tool, you need to enter the respective value for Structural Number for Base Course, Layer Coefficient & Drainage coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Actual Thickness Base Course Payment?

In this formula, Actual Thickness Base Course Payment uses Structural Number for Base Course, Layer Coefficient & Drainage coefficient. We can use 1 other way(s) to calculate the same, which is/are as follows -

Actual Thickness Base Course Payment = Structural Number for Subbase Course/(Layer Coefficient*Drainage coefficient)

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