H-5 Task 4

Question 1

what adjustment is made at the bottom of the stringer and why?

Answer 1

Rise must be the same for each step, the first step is reduced by the tread thickness
“dropping the stringer”
Making the rise of the first step equal to the others

Question 2

what adjustments are made at the top of the stringer and why?

Answer 2

Adjustments will vary depending upon how the stringer is attached to the floor framing

If a stringer support boards is the finished riser, the cut line is adjusted by the thickness of the riser

Question 3

what should the depth of the gain be for housed stringers?

Answer 3

1/2”, gives adequate bearing for a well-fastened tread and does not substantially weaken the stringer

Question 4

what causes squeaks in stairs?

Answer 4

stringers or treads rubbing against the wall, they must be either be spaced so they are not in contact or
be fastened hard with adhesive and strong fasteners

Question 5

where are glue blocks installed?

Answer 5

at the joints of the tread and riser boards as you install up the staircase

Question 6

what is the primary concern for handrails and guards?

Answer 6

Safety, they must be very strong and be able to resist heavy lateral forces

Question 7

what is the maximum spacing for handrail brackets?

Answer 7

1.2m apart

Question 8

minimum and maximum handrail height for stairs?

Answer 8

865mm to 1070mm height above the nosing line

Question 9

what is guard height set at?

Answer 9

1070mm above landing, same as max handrail height

900mm for within dwelling unit

Question 10

are you allowed to use 2x4 or 2x6 for handrails?

Answer 10

not allowed laying flat, must be continually flat and user must be able to grip the rail without having to stretch their hand