Exam 42: Stairs

A common rule of thumb for stairs is that the height of two risers plus the width of one tread should be between __________ inches and __________ inches.

How many 7 1/2-inch risers are there in a flight of stairs when the total rise of the stairs is 12 feet 6 inch?

Find the number of treads for a flight of stairs that has a total rise of 133 inches and a unit rise of 7 inches.

Determine the number of 6 1/2-inch risers there are in a flight of stairs when the total rise of the stairs is 9 feet 9 inch?

All risers must be within __________ inch of the same height and all treads must be within __________ inch of the same width.

To make measurements practical it is sometimes necessary to make one tread or riser very slightly different size from the rest of the risers or treads.

The International Residential Code specifies that treads must be at least __________ inches wide and risers may not be more than 7 3/4 inches high.

Find the unit rise and unit run of a stair to fit an opening that has a total run of 13 feet 11 1/2 inches and a rise of 6 feet. Eleven treads are used.

How many risers are required for a set of stairs if the total height is 18 feet 3/4 inch and the unit rise is 7 1/4 inches?

In very few cases, the carpenters have to build stairs on site.