Common and Proper Nouns. A common noun names a general person, place. or thing. examples: I went to the city. The man was kind. A proper noun names a specific person, place, or thing. Always capitalize the first letter of a proper noun. examples: I went to San Francisco.
The width of the steps is flexible. A wide deck staircase (5 feet and beyond) feels graceful and looks it too. A narrow one, for example 3 feet wide, might feel cramped. Very wide steps are great...if you have the room for them and they work with your design. These usually work best with a single set of deck stairs.
These treads are narrow on one end and wider at the other. Spiral/Circular Stairs: Have their own regulations that often stipulate the minimum width of around 6 at the smallest end of pie shaped treads, and often specify that a tread must be somewhere between 9-10 wide, measured 12 inches from the narrowest end.