cable or wire rope, minimum tensile strength

huangyhg

cable or wire rope, minimum tensile strength
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. please help.
i would think you'd either need to test it or locate drawings and mill test reports for the job.  you can buy wire rope in different grades, and i would assume that a suspension bridge built 30 years ago could very easily be something beside the standard grades.
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 uss united states steel.  there's also more to the design, such a cable anchorage, sheave diameter etc.  also, factor of saftys vary with the use.
the standard grades that i quoted from the manual was re-published in 1968.
dear oldrunner,
you have the link to the wire rope engineering handbook?
regards
clefcon
thanks jstephen, oldrunner and clefcon for your excellent input. i went into the sliderule era website and obtained the wire rope engineering handbook. again thanks.