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WorksheetsCavity Wall Construction
Total questions: 20
Worksheet time: 40mins
What is the collective term given to all work carried out above ground level?
Substructure
Superstructure
Above Datum
Walling
What document is issued in conjunction with a plan or working drawing and provides written information about the work to be carried out?
COSHH statement
Risk assessment
Specification
Time sheet
What would be placed between the two leaves of blockwork in footings before backfilling takes place?
Insulation
Lean mix concrete
Mortar
It is left hollow
Masonry cement should not be used in substructure walling because:
It produces a mortar that is too light in colour
It contains a plasticiser that weakens the mortar
It is too expensive
The curing time is too long
A strip foundation for a 300mm cavity wall is usually excavated to a width of:
450mm
600mm
750mm
900mm
What is the minimum distance a damp proof course should be positioned above ground level?
150mm
300mm
450mm
600mm
The three classifications of damp proof course are:
Flexible, semi-flexible, rigid
Brick, slate, plastic
Flexible, semi-rigid, rigid
horizontal, vertical, diagonal
What is the purpose of a core hole, as shown in the image?
It allows air to ventilate the cavity
It provides access to the concrete floor slab
It allows for the cavity to be cleared of mortar droppings at the end of each day
It is where air bricks will eventually be positioned
What is the minimum distance a tie iron should be bedded in to each leaf of a cavity wall?
25mm
50mm
75mm
100mm
Which of the following statements is correct with regard to tie iron spacings in a cavity wall with a cavity of 100mm?
Tie irons should be spaced 450mm horizontally and 450mm vertically
Tie irons should be spaced 900mm horizontally and 900mm vertically
Tie irons should be spaced 450mm horizontally and 900mm vertically
Tie irons should be spaced 900mm horizontally and 450mm vertically
What is the maximum horizontal distance tie irons should be positioned away from an opening or stopped end?
100mm
150mm
200mm
250mm
At an opening or stopped end, what is the maximum vertical distance ties irons should be spaced apart? (choose two answers)
Every course of blocks
Every two courses of blocks
Every 225mm
Every 450mm
When positioning partial fill insulation, which of the leaves of wall should be built first?
It doesn't matter, you can build either
The brickwork should be built first
The blockwork should be built first
They should be built together
What is the minimum bearing for a metal cavity lintel?
100mm
150mm
200mm
250mm
What is the purpose of a cavity tray?
It prevents rising damp
It increases the thermal insulation qualities of a property
It protects a metal lintel from rusting and subsequently failing
It forces water to the external leaf at point where the cavity is closed / bridged
What is the purpose of the item shown in the sketch?
it allows for moisture to be drained from a cavity
It allows for ventilation of the cavity
It closes of the gaps where dependant scaffold had been fixed
It ensures perp joints are consistent in size
Where should broken bond be positioned?
At one end of a wall
At both ends of a wall
In the middle of a wall
Under a door or opening
Which type of drawing would contain hatchings?
Elevation drawing
Isometric drawing
Detail drawing
Sectional drawing
If a cavity wall without openings was 5m long and 2 metres high, how many bricks, blocks and tie irons would be required?
60 bricks, 6 blocks and 5 tie irons
600 bricks, 60 blocks and 50 tie irons
600 bricks, 100 blocks and 50 tie irons
6000 bricks, 1000 blocks and 500 tie irons
What is the component in the image used for?
It is to insulate underfloor spaces
It is to insulate loft spaces
It is to close of cavities at openings / reveals
It is to close of cavities at wall plate
