BCGBC4010A Apply structural principles to residential low-rise constructions

Wall systems

Topic activity
Question 1 of 20
What is a jack stud?
A.	A stud that is longer than a common stud
B.	A stud that is shorter than a common stud
C.	Either of the above
D.	It depends on its purpose
The correct answer is B - A stud that is shorter than a common stud. It is cut to go above or below an opening.

Question 2 of 20
Which one of the following statements is correct?
A.	Walls exceeding 2,700 mm in height require multiple rows of noggings.
B.	Walls less than 2,700 mm in height require multiple rows of noggings.
C.	Walls exceeding 2,700 mm in height require fewer rows of noggings.
D.	Walls less than 2,700 mm in height require no noggings at all.
The correct answer is A - Walls exceeding 2,700 mm in height require multiple rows of noggings. Their maximum spacing is 1,350 mm.

Question 3 of 20
What kind of support does bracing provide?
A.	Upwards support for the wall framing
B.	Lateral support for the wall framing
C.	Both upwards and lateral support for the wall framing
D.	Lateral support for the flooring
The correct answer is B - Lateral support for the wall framing. Lateral means sideways.

Question 4 of 20
Which of the following do live loads include?
A.	People, moveable items in the building, structural elements of the building
B.	Structural elements of the building
C.	People and moveable items in the building
D.	All wind forces
The correct answer is C - People and moveable items in the building. All these are moveable, so are not ‘dead’ loads.

Question 5 of 20
At what spacing does tiled roofing require studs?
A.	Wider spacing than metal roofing
B.	Closer spacing than metal roofing
C.	The same spacing as metal roofing
D.	Spacing is not specified in Australian Standards
The correct answer is B - Closer spacing than metal roofing. Tiles must be at 450 mm and metal roofing at 600 mm.

Question 6 of 20
Where is the notch when studs have to be braced? 
A.	In the stud
B.	In the bracing
C.	In either
D.	Notching is not the option
The correct answer is A - In the stud. The notch must always be in the stud.

Question 7 of 20
Why can’t a jamb stud in an external wall be notched?
A.	It carries a lighter load than a common stud
B.	It is nail-laminated
C.	It carries a heavier load than a common stud
D.	It is only a single stud
The correct answer is C - It carriers a heavier load than a common stud. Notching would weaken it.

Question 8 of 20
What does the size of a lintel depend on?
A.	The width of the opening only
B.	The combination of loads only
C.	Both of the above
D.	Neither of the above
The correct answer is C - Both of the above. 

Question 9 of 20
What are common studs?
A.	Vertical members that transfer loads vertically
B.	Vertical members that transfer loads horizontally
C.	Horizontal members that transfer loads horizontally
D.	Horizontal members that transfer loads vertically
The correct answer is A - Vertical members that transfer loads vertically. Studs transfer loads to the bottom plate.

Question 10 of 20
What percentage of the strength of permanent bracing must temporary bracing be?
A.	100% of permanent bracing
B.	60% of permanent bracing
C.	50% of permanent bracing
D.	40% of permanent bracing
The correct answer is B - 60% of permanent bracing. This is necessary for it to be of use as it faces strong forces.

Question 11 of 20
To where does bracing transfer racking forces?
A.	Through the framework to the sub-floor
B.	Through framework and the sub-floor to the foundations
C.	Through the sub-floor to the foundations
D.	Through the sub-floor to the framework
The correct answer is B - Through framework and the sub-floor to the foundations. This is the purpose and action of bracing.

Question 12 of 20
Where is a large horizontal diaphragm formed?
A.	Ceiling and wall
B.	Ceiling and floor
C.	Walls and floor
D.	All of the above
The correct answer is B - Ceiling and floor. The walls rely on this to prevent them from blowing over.

Question 13 of 20
Bracing units must be installed at a 90 degree angle to the surfaces facing the wind. True or false?
A.	True
B.	False
The correct answer is A - True. For surfaces facing the wind, 90 degrees is the necessary angle for bracing to be installed.

Question 14 of 20
The top plate needs to be reinforced when rafters land on top of plates. True or false?
A.	True
B.	False
The correct answer is B - False. It is only necessary when rafters do not land on top plates.

Question 15 of 20
If a tie-down is specified as having better resistance to gravity, nominal nailing is not required. True or false?
A.	True
B.	False
The correct answer is A - True. Its extra resistance means it does not need the nailing.

Question 16 of 20
Sarking can be fixed over the flooring materials. True or false?
A.	True
B.	False
The correct answer is B - False. Sarking must be under the flooring materials.

Question 17 of 20
Where are flashings installed?
A.	At corners only
B.	At vertical joints only
C.	Around openings only
D.	All of the above places
The correct answer is D - All of the above places. This is to stop water penetrating the frame cavity.

Question 18 of 20
What effect does installing metal straps over plates and fixed to studs have?
A.	Reduces the racking force
B.	Decreases brace capacity
C.	Increases brace capacity
D.	Increases the racking force
The correct answer is C - Increases brace capacity. This is if extra bracing is needed.

Question 19 of 20
What must all fixings be protected from?
A.	Corrosion
B.	Termites
C.	Sunlight 
D.	Racking forces
The correct answer is A - Corrosion. This includes weather, moisture and salt.

Question 20 of 20
The Pascal is a unit of pressure. How many Pascals are there in 1 kPa?
A.	500
B.	100
C.	1,000
D.	2,000
The correct answer is C - 1,000. The symbol for kilopascals is kPa where k = 1,000.

© Copyright Commonwealth of Australia 2007