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RICS APC Technical > Construction Tech > Flashcards

Construction Tech Flashcards

1
Q

What is the formation of a basement retaining wall?

A

A series of adjacent piles to form an earth retaining and watertight structure, for example secant pile wall. Interlocking female and male piles formed using CFA method. Female piles first. Area inside the walls is then excavated.

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2
Q

Difference between unitised and stick cladding

A

Unitised is a prefabricated system.
Prefab - quicker, increased quality, less labour.

Stick is on site, transoms and mullions form a grid and a panel is placed inside.
On site - specialist works, won’t get damaged arriving to site and design flexibility

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3
Q

What is Approved Document L?

A

Conservation of fuel and power.

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4
Q

What is Approved Document B?

A

Fire Safety.

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5
Q

What is Approved Document F?

A

Ventilation.

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6
Q

What is Approved Document P?

A

Electrical Safety.

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7
Q

Detail the retaining wall system on Erith.

A

Kingpost retaining wall of various heights.

Drilling of holes where the posts will be installed
Install king posts
Install infill concrete panels

The cost of kingpost retaining walls vary dependant on their size. The average cost used per m2 on Cox Lane is £480m2

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8
Q

How much are you paying for rebar?

A

The latest tender return I have is for Printworks and the average return price was at £1,300 per tonne.

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9
Q

How much is concrete?

A

The latest tender return I have is for Printworks and the average return price was at £220 m3

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10
Q

How much is formation?

A

£70 m2

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11
Q

What is the rate of disposal of excavated materials?

A

Depends. Contaminated £200-400/m3, non-contaminated £70/m3

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12
Q

What is the rate of steel?

A

The latest tender return I have is for Printworks and the average return price was at £5,500 per tonne

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13
Q

What are the different types of piles?

A

Driven - arrives precast and driven into the ground. Causes noise and vibration, displaces soil

Bored - hole is drilled using a drilling rig. Concrete is poured insitu and reinforcement cage is dropped in. CFA is when an auger is used to excavate material and then as it is brought up concrete is poured, then reinforcement is dropped

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14
Q

Why is piling considering for certain buildings?

A

Loading requirements, ground conditions and weight distribution

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15
Q

What are the four grades of waterproofing?

A

Grade 1: Protection from basic dampness (non-living areas).
Grade 2: Dry for storage areas (occasional damp tolerance).
Grade 3: Habitable areas (fully dry).
Grade 4: High-sensitivity areas (no water or humidity).

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16
Q

What are the main types of waterproofing?

A

Type A Barrier Protection
Type B Structural Integral Protection
Type C Drained Protection

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17
Q

What type of waterproofing is required at grade 1?

A

Grade 1: Protection from basic dampness (non-living areas).

  • Cementitious waterproofing, coating or slurries
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18
Q

Talk me through the construction technology on one of your projects

A
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19
Q

How do you construct a crane?

A
  • Survey ground
  • Construct a concrete base (depending on crane specifications and soil conditions).
  • Assembly (a mobile crane used to lift the crane’s core components into place).
20
Q

How do you construct a retaining wall such as what’s on printworks?

A
21
Q

If a client had to reduce carbon, what would you look at in the design?

A

Embodied or Operational?

Embodied,
- structure, timber over concrete or steel for example
- reuse materials or recycled materials
- reduce transportation emissions
- refurbishment where possible

Operational
- renewable energy e.g. solar panels
- efficient lighting systems
- air tight design to reduce energy requirements
- optimise insulation

22
Q

What is an inverted roof?

A

Insulation is laid loosley on top of the waterproofing layer.

23
Q

Benefits of Steel?

A
  • Faster to erect on site
  • Covers large spans
  • Lighter
24
Q

Benefits of Concrete?

A
  • Easier to shape into differect shapes
  • Integrally fire resistant
  • Acoustic properties
25
Q

Risks of Steel?

A
  • Need to add fire and acoustic treatments
  • Risk of rusting
26
Q

Risks of Concrete?

A
  • Heavier
  • Less flexible than steel
27
Q

Name some Building Regulations

A

A - Structure
B - Fire Safety
D - Toxic Substances
F - Ventilation
L - Conservation of fuel and power
M - Access to and use of buildings
P - Electrical Safety

28
Q

What are the costs of sandblasting the steels at Erith?

A

Nr - removal of steelwork and transfer to the factory (£1000)
m2 - sandblasting (£375)
Nr - provisional allowance for repairs (£50 m2)
m2 - intumescent paint (£40)
m2 - powder coat (80m2)
Nr - installation

29
Q

What is a VRF system?

A

A HVAC technology that efficiently heats and cools large spaces by circulating refrigerant through indoor units connected to an outdoor condenser. It adjusts refrigerant flow to meet specific zone needs, providing precise temperature control across multiple areas.

30
Q

What is HVAC?

A

HVAC stands for heating, ventilation, and air conditioning. It’s a system that regulates the temperature, humidity, and air quality of indoor spaces

31
Q

Why is a VRF system energy efficient?

A

It adapts the refrigerant flow depending on end user demand, so it only ever uses the exact amount of energy required.

32
Q

What is the build up of a core wall?

A

At Redhill
- blockwork
- insulation
- blockwork
- plasterboard and finishes to each side

33
Q

What is the build up of a cavity brick wall?

A

Outer brick leaf - usually not load-bearing

Inner leaf - usually load-bearing and at least one brick thick. It can be made of concrete block, structural clay, brick, or reinforced concrete.

Cavity: The gap between the two walls, usually 50–75 mm wide.

Connectors: Metal ties or bonding blocks that fasten the two walls together.

Water barrier: A water-resistant membrane applied to the inner side of the cavity.

Insulation: Foam or mineral wool insulation injected or placed within the cavity.

Vapour control layer: A layer placed on the warm side of the cavity insulation to prevent warm, moist air from penetrating.

34
Q

What is the build up of an internal wall?

A
  • Head and floor track
  • Metal track placed at 400-600 centres
  • Insulation
  • Pattresses (ply)
  • Plasterboard
  • Moisture resistant board, or fire board etc.
35
Q

What is a level entry door and what are some conidiations for it?

A
  • Size requirements
  • Additional foundations to the area inside the level entry where trucks will be loaded up?
  • £3,500 - £4,500
36
Q

Cost of microrib and trapezoidal?

A

Microrib only £60 - £75 m2
Insulated board £75 - £90 m2

Trapezoidal - £45 - £55

37
Q

What’s the build up of secant retaining wall?

A
  • PIling mat
  • Piling rig
  • positioning the piling rig
  • Primary piles installed using CFA method (removing the soil and pouring the concrete in one pass of the auger
  • Secondary pile is constructed overlapping with the primary piles either side and reinforced
  • Piling cap
38
Q

What’s the build up of the retaining wall at Printworks?

A
  • Strip foundations
  • concrete reinforced wall for the level changes
  • brick wall above
39
Q

What are some examples of type 1 waterproofing?

A
  • bonded sheet membrane
  • liquid applied coatings like cementitious slurries
40
Q

What are some examples of type 2 waterproofing?

A

Secant wall

41
Q

What are some examples of type 3 waterproofing?

A

Cavity wall system, sometimes with a sump pump

42
Q

What’s the purpose of a parapet?

A
  • reduce wind loads on the roof
  • conceal rooftop equipment
  • guard rails
43
Q

What was the build up of the parapet at Cox Lane?

A

steel frame the microrib to both sides and inbuilt guttering and any flashings

44
Q

Cost of piling?

A
45
Q

Average cost of a CAT-A fit out?

A

£60 m2

46
Q

What is the build up of a party wall?

A
47
Q

What are some roof waterproofing systems?

A
  • Proteus hot melt waterproofing
  • Cold applied liquid waterproofing

RICS APC Technical (10 decks)

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