Could be pre 72, and, reasonable exceptions.?ÿ And again, with that out fit, looks to be a fed employee, therefore immune from OSHA, esp in it's infancy.?ÿ?ÿ
Hoisting that beast must have been fun or punishment for the rod man.
For more non-OSHA fun, look at photos and movies of USC&GS's Bilby tower work. The crew members would climb up the outside of a tower (routinely 100+ feet tall) to get to the observing platform, and then would go back out to climb up the outside to the signal light platform. I've seen a movie clip of a USC&GS guy standing on one foot atop the pinnacle of a Bilby tower, dancing a precursor of "The Twist." Erecting and dismantling the towers also provided opportunities for thrills.