There is this rule that when climbing a catladder you need to attach yourself to the ladder. So do it safely, you need to use a double lanyard on a full body harnass. Then you put your foot on the bottom rung and... Attach the one lanyard above your head onto a rung. Climb up the ladder. Attach the second lanyard to the ladder. Climb down the ladder and detach the first lanyard. Climb up the ladder and loosen the second lanyard. Climb down the ladder and loosen the first lanyard. Climb up the ladder.... And when your supervisor want to know when you reach the top and start working, you simply say, "when I am done with Safety!!" Or do you know of a better excuse?