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.
1 (c) (1) The rise of every step in a stairway shall be not less than 4 inches nor greater than 7 1/2 inches. ( 2 f) ... There shall be not more than 12 feet vertically between landings.  So, there could be as many as 36 4-inch (minimum) steps in a 12-foot (maximum) flight of stairs. In the kind of doubled-back flight of stairs typically seen in a multi-storey stairwell, each flight is probably going to be between 8 and 10 steps, depending on the floor spacing.