How wide were typical sauropod femurs?

Hi paleontology-reddit. In one of my solid mechanics courses, we have a humourus (and definatly not serious) assignment to calculate the stress on sauropod hind legs during intercourse in order to determine if (they definately could) have intercourse. I have desperately searched the web, but can't seem to find any good source on the width/cross sectional area/radius of a sauropod femur. Does anyone of you know what a typical size/measurement for any sauropod was?