Module 9

The International Residential Code specifies a minimum stair tread depth of _____

10 inches

The maximum rise for a set of stairs without a landing is typically ___

12 feet

When building a stair with a total rise of 7'-7", the number of risers required and their unit rise is ___

13 risers, each 7" high

For user safety, the IRC specifies that the greatest riser height should not except the smallest riser by more than____

3/8 inch

The minimum and maximum tread depths of a stairway should not differ by more than___

3/8"

Diagram D shows ____ stairway

Narrow-U

Diagram B shows ___ stairway

Wide-L

Diagram C shows _____ stairway

Wide-U

The basic parts of a stairway are risers, treads, and ___

center-cut-stringers

Which type of stringer is typically used for stairways with open riser designs?

dadoed

Tread width (uni run) is measured from the ___

face of one riser to the face of the next riser

When a ledger is installed to strengthen a stair assembly, treated lumber must be used if the ledger is ____

fastened to a concrete floor

To add strength to the stair assembly, a pressure-treated 2 X 4 may be fastened to the floor to serve as a ___

ledger

All of the following are parts of a balustrade except ____

nosing

If stairway drawings are incomplete or in conflict with the building code, the carpenter should ___

notify a supervisor

Diagram A shows ____ stairway

open stairway

The most important concern in the design of any stairway is ___

safety

For more efficient stair layout, the rise and run measurements on a framing square can be marked by using ___

stair guages

What component is secured to one side of the stringer below the cut notches to add strength and rigidity?

strongback

On a 36" wide wood stairway, a center cutout stringer is required if ___

the tread material is thinner than 1 1/2"

Rule 2 for calculating rise-to-run ratio is stated as ____

tread width + (2 X riser height) = 24" to 25"

The horizontal distance from the face of one riser to the face of the next riser is the ___

unit run

When laying out a stringer using a framing square, the blade of the framing square represents the ___

unit run