I've got a 4-story brick building. Fire broke out on the top floor and two people are trapped up there. There's a metal fire escape that goes clear to the ground. I have someone trying to climb up to get in to save them. He's got rubber-soled shoes, and he has two woolen blankets that he's saturated with water. No gloves or oxygen mask, though. The fire broke out on the west side of the building (it's about 30'x60' for the sake of argument--I googled the length of an average city block) and the character is climbing from the East.
About how high is he likely to get before the railings become too hot to touch or the slats begin to melt the rubber soles of his shoes? (or until the heat causes discomfort to the soles of his feet?)
The fire has been going on for about 45 minutes.