To find tension of cables:

Let x represent deflection.

Let y represent half the span.

Let W represent weight of cables and load equally distributed.

Let T represent tension resulting,

and the following formula will give the value of tension:

Substitute for x, 59 and y, 410.66, and

or T = W x 1.81.

The tension of the cables, therefore, will be obtained by multiplying the weight W by the factor 1.81.