You can only see that information about someone in your friends list. You can use the message system with someone not in your friend's list, but chances are that your first message will go to their other folder and not to their inbox.
Best Answer: Average width of a staircase is 36 minimum. The tread (step) is no less then 10. The rise is from 7 to 8 depending on the total rise. Take the total rise and divide by 7 1/2, average step, and that gives you you # of steps. Then take total rise and divide by # of steps, this tells you the exact size of your step. Now take size of rise and X by # of steps.
R311.5.8.l Spiral Stairs. Spiral stairways are permitted. provided the minimum. width shall be 26 inches (660 mm) with each tread. having a 71,4 inch (190 mm) minimum tread depth at. 12 inches from the narrower edge. All treads shall be. identical, and the rise shall be no more than 9th inches. (241 mm).