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.
3 votes Currently voted the best answer Vote for this answer. Doors come in a range of standard heights and widths, but are commonly 1-3/8-inches thick. The chart to the left shows common widths for a door with heights of 6'-6 and 6'-8. The 6'-8 height is the most common.. http://www.houseplans-and-homebuilding.com/interior-door-size.html. The chart at the reference link shows a standard 6'-6 door in a width of 2'-6. The more common 6'-8 door ranges in width from 1' to 3'. The interior bedroom doors in the house I am living in are 6'-8 in height and 2'-6 wide, which is generally what you see in non-custom new construction homes in the US.