Pearson: stair systems

Which of the following is the formula for calculating the optimum number of risers for a​ stairway?

Total rise of the stairway divided by​ 7"

Which of the following is the formula for calculating riser height for a​ stairway?

Total rise of the stairway divided by number of risers

What is the term for the horizontal distance from the face of one riser to the face of the next​ riser?

unit run

If you know the total rise and total​ run, you can calculate the stringer length using which​ formula?

​(asquare+bsquare=csquare​)

Which of the following measurements will result in a staircase having the proper angle for comfortable climbing and​ descending?

Riser height​ 7½"; Tread width​ 10½"

What is the main post supporting a handrail at the bottom of the stairway

called the newel post.

T/F To find the total rise of a​ stairway, add the floor assembly thickness to the vertical​ distance, in​ inches, from the finished ceiling to the floor at the base of the stairs.

True

The handrail in a closed stairway is called a​ _____.

wall rail

According to both the

IBC ​® and the IRC ​®​,what is the maximum tolerance between the largest and smallest riser height or between the largest and smallest tread depth in any flight of​ stairs?

3/8”

What is the term for the vertical distance of a stairway one floor to the floor​ above?

total rise

What stairway shape has two sets of stairs that run parallel to one​ another?

U-shaped

The unit rise for a set of stairs with 15 risers and a total rise of​ 106" is​ _____.

7.066”

Which stair framing component is the horizontal surface of the​ step?

tread

Which of the following is NOT a rule for determining the​ riser-to-tread (unit​ rise-to-run) ratio?

Tread width x​ (2 + riser​ height) =​ 20" to​ 22"

How many stringers are typically required for a stairway that is more than​ 30" wide?

3

Which stair framing component provides the main support for the​ stairway?

cutout riser

When creating a concrete stairway​ form, what can you do to prevent the wall from cracking if the stairway settles or moves due to expansion and contraction of the​ concrete?

Place an expansion joint between the building wall and stairway.

What is the term for the vertical distance from the top of one stair tread to the top of the next one above​ it?

unit rise

Which stair framing component is the​ step's vertical​ face?

riser

A 2​ × 4 or 2​ × 6 reinforcement fastened to longer cutout stair stringers is called a​ ______________.

strong back

A closed stairway has​ _____.

solid walls on both sides

T/F Landings are required when the vertical distance between the top and bottom of the stairway exceeds​ 15'-7".

False

A wooden stairway that is wider than​ 30" typically requires at least one​ _____.

center cutout stringer

Which of the following is used to establish the rise and run of a​ staircase?

Tread width​ + (2​ × riser​ height) =​ 24" to​ 25"

The main support for a handrail at the bottom of a stairway is called​ a(n) _____.

starting newel post

Because it is challenging to​ build, which type of stairway is often prefabricated​ off-site?

winding stairway

For maximum​ safety, the preferred slope of a stairway is between​ _____.

30 and 35 degrees

The vertical difference between a stair tread nosing and any structure or ceiling above the stairway is known as the​ _____.

headroom

According to the IRC​® and

IBC ​®​,the component designed to minimize the chances of falling to a lower level is the​ _____.

guard

A series of steps that is straight and continuous without breaks is called a​ _____.

flight

Based on the International Building Code®​,minimum stairway width for a building designed for an occupancy of fewer than 50 people is​ _____.

36”

The maximum stair riser height specified in the International Building​ Code® is​ _____.

7”

Based on the International Building Code®​,minimum handrail height from top of rail to nosing is​ _____.

34”

To prevent a building wall from cracking created by​ settling, the​ _____ is placed between the wall and concrete stairway.

expansion joint

A rule of thumb for establishing the proper angle of a staircase states that the sum of one riser plus one tread should equal between​ _____.

17 and 18 inches