Did you look at any federal cases? It was very easy for me to find federal cases involving applicants suing for sex discrimination. My search came up with over 1,000 such cases. In case in which a woman applicant sued for sex discrimination where the employer refused to consider women because they believed women could not meet their lifting requirement (the example you put forth), a federal appeals court held against the employer, stating:
We conclude that the principle of nondiscrimination requires that we hold that in order to rely on the bona fide occupational qualification exception an employer has the burden of proving that he had reasonable cause to believe, that is, a factual basis for believing, that all or substantially all women would be unable to perform safely and efficiently the duties of the job involved.
Southern Bell has clearly not met that burden here. They introduced no evidence concerning the lifting abilities of women. Rather, they would have us ‘assume,’ on the basis of a ‘stereotyped characterization’ that few or no women can safely lift 30 pounds, while all men are treated as if they can. While one might accept, arguendo, that men are stronger on the average than women, it is not clear that any conclusions about relative lifting ability would follow. This is because it can be argued tenably that technique is as important as strength in determining lifting ability. Technique is hardly a function of sex. What does seem clear is that using these class stereotypes denies desirable positions to a great many women perfectly capable of performing the duties involved.
Weeks v. S. Bell Tel. & Tel. Co., 408 F.2d 228, 235–36 (5th Cir. 1969). That case is 50 years old, so it has been quite clear that the law bars discrimination of job applicants based on sex for half a century, and also that requirements like lifting won't allow an employer to prefer men over women in the job. Such job qualifications must be bona fide requirements of the job and women applicants must be given the opportunity to prove they can meet those requirements.