Maximum Sag given Length of Cable for UDL on Parabolic Cable Solution

STEP 0: Pre-Calculation Summary
Formula Used
Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span)
d = sqrt((Scable-Lspan)*(3/8)*Lspan)
This formula uses 1 Functions, 3 Variables
Functions Used
sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)
Variables Used
Maximum Sag - (Measured in Meter) - Maximum Sag is the maximum catenary or the greatest amount of sag that can be allowed in the cable system.
Cable Length - (Measured in Meter) - Cable Length is the length measured along the catenary of cable.
Cable Span - (Measured in Meter) - Cable Span is total length of cable in horizontal direction.
STEP 1: Convert Input(s) to Base Unit
Cable Length: 40.6 Meter --> 40.6 Meter No Conversion Required
Cable Span: 15 Meter --> 15 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
d = sqrt((Scable-Lspan)*(3/8)*Lspan) --> sqrt((40.6-15)*(3/8)*15)
Evaluating ... ...
d = 12
STEP 3: Convert Result to Output's Unit
12 Meter --> No Conversion Required
FINAL ANSWER
12 Meter <-- Maximum Sag
(Calculation completed in 00.004 seconds)

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National Institute of Technology Karnataka (NITK), Surathkal
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12 Parabolic Cable Tension and Length Calculators

Tension at Midspan given Tension at Supports for UDL on Parabolic Cable
Go Tension at Midspan = sqrt((Tension at Supports^2)-(((Uniformly Distributed Load*Cable Span)/2)^2))
UDL given Tension at Supports for UDL on Parabolic Cable
Go Uniformly Distributed Load = (sqrt((Tension at Supports^2)-(Tension at Midspan^2))*2)/Cable Span
Tension at Supports for UDL on Parabolic Cable
Go Tension at Supports = sqrt((Tension at Midspan^2)+(Uniformly Distributed Load*Cable Span/2)^2)
Span of Cable for Length of Cable for UDL on Parabolic Cable
Go Length of Cable Span = 1.5*Length of Cable-sqrt((2.25*Length of Cable^2)-8*(Maximum Sag^2))
Span of Cable given Tension at Supports for UDL on Parabolic Cable
Go Length of Cable Span = (sqrt((Tension at Supports^2)-(Midspan Tension^2))*2)/Total UDL
Span of Cable given Tension at Midspan for UDL on Parabolic Cable
Go Cable Span = sqrt(8*Tension at Midspan*Maximum Sag/Uniformly Distributed Load)
Parabolic Equation for Cable Slope
Go Y Co-ordinate = Uniformly Distributed Load*(Distance from Midpoint of Cable^2)/(2*Midspan Tension)
Maximum Sag given Length of Cable for UDL on Parabolic Cable
Go Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span)
Tension at Midspan for UDL on Parabolic Cable
Go Tension at Midspan = (Uniformly Distributed Load*(Cable Span^2))/(8*Maximum Sag)
Maximum Sag given Tension at Midspan for UDL on Parabolic Cable
Go Maximum Sag = Uniformly Distributed Load*(Cable Span^2)/(8*Tension at Midspan)
Length of Cable for UDL on Parabolic Cable
Go Cable Length = Cable Span+(8*(Maximum Sag^2)/(3*Cable Span))
Allowable Stress for Compression Elements for Highway Bridges
Go Allowable Stress = 0.44*Yield Strength of Steel

Maximum Sag given Length of Cable for UDL on Parabolic Cable Formula

Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span)
d = sqrt((Scable-Lspan)*(3/8)*Lspan)

What is Sag?

The vertical distance between the straight line joining the points of consecutive supports and the lowest point of the conductor is called sag. The tighter the wire, the smaller is the sag and vice-versa.

How to Calculate Maximum Sag given Length of Cable for UDL on Parabolic Cable?

Maximum Sag given Length of Cable for UDL on Parabolic Cable calculator uses Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span) to calculate the Maximum Sag, The Maximum Sag given Length of Cable for UDL on Parabolic Cable formula is defined as the total vertical deflection of cable at the midpoint due to UDL. Maximum Sag is denoted by d symbol.

How to calculate Maximum Sag given Length of Cable for UDL on Parabolic Cable using this online calculator? To use this online calculator for Maximum Sag given Length of Cable for UDL on Parabolic Cable, enter Cable Length (Scable) & Cable Span (Lspan) and hit the calculate button. Here is how the Maximum Sag given Length of Cable for UDL on Parabolic Cable calculation can be explained with given input values -> 12 = sqrt((40.6-15)*(3/8)*15).

FAQ

What is Maximum Sag given Length of Cable for UDL on Parabolic Cable?
The Maximum Sag given Length of Cable for UDL on Parabolic Cable formula is defined as the total vertical deflection of cable at the midpoint due to UDL and is represented as d = sqrt((Scable-Lspan)*(3/8)*Lspan) or Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span). Cable Length is the length measured along the catenary of cable & Cable Span is total length of cable in horizontal direction.
How to calculate Maximum Sag given Length of Cable for UDL on Parabolic Cable?
The Maximum Sag given Length of Cable for UDL on Parabolic Cable formula is defined as the total vertical deflection of cable at the midpoint due to UDL is calculated using Maximum Sag = sqrt((Cable Length-Cable Span)*(3/8)*Cable Span). To calculate Maximum Sag given Length of Cable for UDL on Parabolic Cable, you need Cable Length (Scable) & Cable Span (Lspan). With our tool, you need to enter the respective value for Cable Length & Cable Span 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 Maximum Sag?
In this formula, Maximum Sag uses Cable Length & Cable Span. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Maximum Sag = Uniformly Distributed Load*(Cable Span^2)/(8*Tension at Midspan)
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