WK3 FLOORS

Question 1

Strength of concrete. How does it react to loads

Answer 1

Concrete can handle compression well but will begin to fail under tensile forces i.e being stretched apart

Question 2

Steel reinforcement components

Answer 2

Reo bar
Mesh
Bar chair

Question 2

Why do we use steel reinforcement in building foundations

Answer 2

Because concrete alone will not perform as efficiently. Steel improves its structural behaviour, adds strength, and controls cracking.
Steel has what concrete lacks, tensile strength

Question 3

Slab process (brief)

Answer 3

• Underslab drains
• Sand or crusher dust layer under slab
• Formwork
• Termite treatment (penetrations)
• Moisture proof membrane (foreton, material) Thick plastic
• Chairs (Plastic or plastic coated elements to support the steel at the correct height
• SLab Mesh Reinforcing steel
• Inspections
• Pour slab

Question 4

After footings are poured what happens next? (Floor slab preparation)

Answer 4

• Starter bars are bent downwards to fit within the slab
• A sand bed is then spread out to create a good clean even surface to prevent damage to the following membrane
• The membrane (forteon) is laid out and taped to contain the cocrete pour and prevent moisture loss and then protect teh slab from groundwater ingress
• potential installation of pods
• Chairs are installed to support the steel reinforcing
• Steel reinforcement is placed carefully

Question 5

Waffle slab construction

Answer 5

• constructed on ground surface

Question 6

Advantages of Waffle Raft Slab construction

Answer 6

• less site work/ no trenching
• lower costs, especially on reactive soil sites
• Work can continue in adverse weather conditions
• better insulation from ground and less environmental disturbance

Question 7

What is a flashing and where are they placed

Answer 7

Generally placed at all points where the masonry is in contact with a structural element, a flashing diverts INTERNAL moisture from a cavity to the OUTER face of masonry wall

Question 8

What is a weep hole and where are they placed

Answer 8

A weep hole is a small opening in a brick wall that allows water to drain out from within an assembly. Located at the bottom of the wall to allow for drainage

Question 9

What is a double brick cavity wall and what are the considerations that go along with this type of wall construction?

Answer 9

What: Two leaves of brickwork WITH a cavity. Duh lol
Considerations: Inside leaf MUST be structurally sound before roof framing can begin
- has a longer construction time

Question 10

What is brick veneer and what are the considerations

Answer 10

What: A method of construction where either a timber or steel frame is concealed with a single layer of bricks as the EXTERNAL layer.
Considerations: Same look as double brick, however the bricks are NOT load bearing
- has little benefit to thermal performance
- Its an external skin not a structure

Question 11

Name as many components of timber wall framing as you can remember

Answer 11

Top:
- Top plate
- wall bracing (steel angle strip)
Window
- Soldier studs
- Lintel
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