A good reference for cables could be found in the
Structural Steel Designer's Handbook 3 rd edition by
R.L. Brockenbrough and F.S. Merrit, McGraw-Hill,
In addition to this reference Robot 95 or Robot Millenium
is a good software for cables.
Hope this helps,
Desi J. Kiss, P.E.
Washington Group International
Irvine, Ca. 92692
----- Original Message -----
From: "Brian K. Smith" <smithegr(--nospam--at)bellsouth.net>
Date: Wednesday, September 5, 2001 7:14 am
Subject: RE: Cable Problem
> From Table 12, Case 5, Roark's Formulas for Stress and Strain, 6th
> W = Load @ mid point
> P = Tension in Cable
> Theta = end rotation
> Tan (theta) - sin (theta) = W/(2EA) or if theta < 12degrees, theta =
> P = W /(2 tan (theta))
> Depending upon how large your P value is, you may need to consider
> yourreduction in cross sectional area when using these equations.
> Brian K. Smith, P.E.
> -----Original Message-----
> From: W. Gray Hodge [mailto:ghodge(--nospam--at)hodgedesign.com]
> Sent: Tuesday, September 04, 2001 3:26 PM
> To: 'seaint(--nospam--at)seaint.org'
> Subject: Cable Problem
> Can anyone tell me (or direct me to a good resource) how I
> calculate the
> sag and resultant tension in a cable due to a point load, given the
> distance between end supports, the cable properties (Area and
> Modulus of
> Elasticity), the initial tension in the cable and the magnitude and
> location of the point load along the cable. I am assuming that
> the ends
> of the cable are at approximately the same elevation.
> Thank you for your assistance.
> Gray Hodge
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