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Flashcards in 020302d Deck (11)
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1
Q

What is the maximum vertical rise between stair landings?

A

3.7 m

2
Q

Why are “loop inserts” attached to the keys formed in stairwell walls?

A

To allow threaded rods to tie into the throat of the stairs.

3
Q

What is involved in accurately determining the length of the soffit formwork for a concrete stair landing?

A

Allow for nosing, landing thickness and the soffit throat measurements.

4
Q

What is the most critical item when forming a concrete stair?

A

The location and attachment of the rider forms.

5
Q

If a stairway is to have a mid-height landing, how many risers are required?

A

An even number of risers

6
Q

What is the suggested unit ride for an interior stair?

A

180 mm

7
Q

If multiple stairs with the same rise, run configuration are to be constructed, what is recommended as an economical solution for holding the riser forms in place?

A

An inverted stringer with short pieces of angle iron.

8
Q

If concrete stairs have been laid out properly but there is a consistent collection of water along the treads, what has caused this to happen?

A

Riser material was cut wider than the unit rise.

9
Q

You would use solid lumber at the top of the plywood concrete stair soffit forms to avoid cutting plywood forms. T or F

A

T

10
Q

What is the result if riser forms used on a concrete stair are ripped 6 mm too wide?

A

The treads will slope inwards and trap water.

11
Q

Why are inverted stringers placed 30 mm above the finished tread level?

A

To allow easier concrete finishing.