I have a 1" diameter strand on an existing 1970s rehabilitated cable/wire rope bridge that I am analyzing. I know that the steel material is not of A36 type. I am looking for help in coming up with the minimum tensile strength.
Cable is never A36. You will really need to identify the particular type. 6x7 and 6x19 IWRC rope, 1" dia. has a breaking strength of 45.7 tons while galvanized bridge strand has a BS of 46.0 tons. The modulus of elasticity can vary from 13E6 to 21E6.
Refer to the Wire Rope Engineering Handbook published by Bethlehem Steel. There’s also more to the design, such a cable anchorage, sheave diameter etc. Also, factors of safety vary with the use.
The standard grades that I quoted from the manual was re-published in 1968. The handbook is archived courtesy of @slideruleera at
Above is a snippet.