How to measure tension in guy wires? Could somebody please help/guide me in the right direction as to how I would go about measuring the tension in guy wires for a college assignment? I have been told that one method is to place some sort of rigid frame next to the cable, that touches the cable at two points a known distance apart. Then at the midpoint between the contact points use a spring scale to displace the cable a specific measurable distance and that the tension will be proportional to the amount of force required to displace the cable. And also that I could measure the resonant frequency of the wire and go from there. Would be really grateful if somebody could help and explain how these particular methods or any methods would actually work and also with the relevant maths/physics formulas that I would need etc. Thank You.