Mechanical Engineering: Ch 10: Forces on Cables (13 of 33) Distributed Load: Find Sag=?

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In this video I will find the sag=? of a cable with a distributed load.
Next video in this series can be seen at:
• Mechanical Engineering...

[@eckhard2464]

wat a legend...been struggling with a question for a long time. and I only had to watch this video once to solve my problem

[@lleox92]

excellence videos, thanks sir.

[@EricDumontEngineer]

If you don't have Sb = 25.5m, how can you find value for the Sb ? Do you need to take account of the nominal weight of the cable ?

[@Fire_._Bird]

G'day Michael, Great explanation. I have a problem where i know the span, but i need to find the length of the conductor and the sag of the line. This is for a Specialist Maths Investigation. Is there any way to find these out? Your reply will be much appreciated!

[@MichelvanBiezen]

Typically the required sag is determined by the tension allowed on the cable. The greater the sag, the smaller the tension. See the videos in this playlist starting with # 17 on the catenary

[@Fire_._Bird]

@@MichelvanBiezen G'day Michael, appreciate the reply. Is the tension determined by the mass of the cable? The context of my problem is that I am doing a Year 12 investigation that involves 3D vector maths. I have modelled a valley with 2 ridgelines, and the span of the 2 ridgelines is 6.10m. The issue with this is that, I don't have a lot of known values. I would appreciate if we could do a Zoom call where we could discuss values and equations needed. I have attemped to try and solve by watching your videos, but unfortunately the similarity of the contexts of the problems are minimal. Would love to collab with you soon!

[@garballs1443]

Where was the material specs taken into account? How can we add a constant tension?

[@indikaasithadissnayake7048]

Nice sir Weldon

[@softwarephil1709]

The shape of a hanging cable is a catenary, not a parabola.

[@cameronc4131]

So true

[@nayabahmad9312]

Dear Sir.what would be the ends conection type in the electric transmission pole? How to calculate the effective length in the electric pole?

[@aLexTeR1992]

Hello, I curious about the Sb=25.5m. how do you determine there is additional of 0.5m in that cable? your comment is much appreciated.

[@MichelvanBiezen]

In this problem it is a "given". And you are asked to find the sag. In other examples you may be given the sag and asked to find Sb.

[@exaltant2464]

Is there a valid equation for sag as h=(wl^2)/8(To)^4?

[@MichelvanBiezen]

We sometimes use equations that approximate the shape. They are not exact, but sometimes serve the purpose of obtaining a good estimate.

[@exaltant2464]

@@MichelvanBiezen Thank you 😊