These are three simple on-line calculators that can be used to determine the theoretical anchor loads in high-lines, span-lines, two point anchors, and deviations.
Please note that units have not been specified and are not required. The output units will be consistent with those of the inputs.
Highline tension calculator
Two equal height anchor points, load mid-span, system in equilibrium.
Two point anchor calculator
Two offset anchor points, one load, system in equilibrium.
Deviation anchor force calculator
One main anchor point, one deviation to position load, one load, system in equilibrium.
© Richard Delaney, RopeLab 2015