Construction Technology Flashcards
What information would you expect at stage 2
Concept Design
Outline proposals for structural design, building services, outline specification
Final project brief issued
What are the different types of asbestos
Brown
Yellow
Blue
Why was asbestos used
Insulating
strengthening
how can we protect ourselves from asbestos?
Asbestos surveys
What information would you expect from the design team at RIBA stage 4
A complete integrated design, with detailed Specifications.
What are the different types of Asbestos surveys
Management Survey
Refurbishment and demolition survey
Why would you use pad foundations
To spread a load of a column over a wide surface area.
what is compressive strength
Squeezing force is applied to the object
What forces act on beams
tension on the bottom compression at the top
What is the price of Steel
Volatile market
£2,500/t Steel beams/columns
£1,300/t Rebar
What are the different concrete grades
C10 has 10 newtons of strength
C20 has 20 newtons …
What are the different concrete grades
C10 has 10 newtons of strength
C20 has 20 newtons …
What would you do if the level of information provided was not adequate?
Important to communicate what you expect at each stage
Inform design team/PM/client of requirements
if programme is extended & design Progress - Great
If not, included clarifications, to state the level of design information and ensure client knows
update risk accordingly
Different types of pile foundation
Bored/replacement
Driven/Displaced
Secant Piles
Continuous Piles
When would you use Steel Frame Construction
Large open Spans, such as office
Tall buildings as it has better strength to weight ratio then concrete
When flexibility is important
When would you use concrete frame Construction
Where larg open spans are not used - residential
Flexbility is less important
Pros/cons of Concrete
Pros
- Good thermal insulator
- Good accoustice
- Doesnt require fire protection
- in-situ is good for cashflow
- Cladding is ease to connect
- Can deal with complex geometry
Cons
- Good concrete subcontractor
- Bad for embodied carbon
- Heavy
How would you fix curtain walling facade
Bolted (cheaper then welding)
Riveted (fast, like a nail)
Welded (melted together)
Whats the difference between glulam & CLT
Glulam is planks of timber laid virtcally ontop of each other - good for Beams/columns
CLT - Cross Laminated Timber
Layers of timber laid perpendicular to each other
- Good for panels and slabs
Pros and cons of timber framed buldings
Pros
- Sustainable
- low embodied carbon
Cons
- Cant do high buildings
- Requires acoustic and fire protection
- Expensive
- Fire & rotting treatment
What prefab experince do you have
Prefabricated unit at Glangwili
cost plan a prefab unit
What was included in the cost estimate for the modular building
Excavations Foundations Unit Externals works Connections to the unit
What was included in the cost estimate for the modular building
Excavations/ site prep Foundations - Strip foundation Pod delivery & installation costs Allowance for external doors and windows services fit-out Externals works
Why would you use pre-fab
Economies of scale: could be cheaper
Sustainable
- Less waste
- factory construction
Quality
Safe, less risk construction in factory
Fast
Why would you not use prefab
Cost, not always cheaper
finish is sometimes less desireable
What is a grade 1 vs grade 2 building
Grade 1: building of expectional intreset (buckingham palace
Grade 2: Particularly important buildings
What is a stick system
Curtain walling installation technique
Secondary steel frame attached to the structure, curtain wall fixed to this
cheaper, slow
What is a unitised system
Curtain walling installation technique
Pre-fabricated in modules off-site and delivered in panels
Benefits of prefab factory conditions, fast install but long lead time
What is rainscreen cladding
Non-structural external surface
Formed of outer protective skin (metal, timber, glass, etc ) supporting frame, a cavity and water resistant materials which includes a layer of installation
What is the sixe of a brick
215mm x102.5mm x65mm
How many bricks are in a m2
60 approx
what are the different types of brick bonds
Flemish bond - on stretcher between headers
Stretcher bond - wall just half a brick wide, stretch face showing
What are the main types of excavation
Open, Premieter tench excavation, Complete excavation
What are the main types of excavation
Open, Premier tench excavation, Complete excavation
Types of basement construction
Retaining wall & Raft
Box and Cellular
Piled
What is CAT A, CAT B, Shell and Core
Different levels of internal fit out
What is CAT A
Basic level fit-out from a landlord
What is included in CAT A
Raised access Floor,
Basic M&E fit-out
internal finishes
Blinds
What is CAT B
Final fit-out by the tenant for the internal space
What is included in CAT B
Final Finishes & branding Installation of offices Specialist installations IT equipment Kitchen furniture
What is Shell and core
The structure of the building, frame, cladding base plant, completed communal areas
What is the price of CAT A
£50ft2
What is the price of CAT B
Anything depending on the level of the fit-out
What is a day one reinstatement basis cover
The sum insured is declared as on the first day of the insurance and an inflation provision is then chosen to reflect the effect of inflation over the cover period.
What are Shell and core
The structure of the building, frame, cladding base plant, completed communal areas
What is a day one reinstatement basis cover
The sum insured is declared as on the first day of the insurance and an inflation provision is then chosen to reflect the effect of inflation over the cover period.
What is a green roof build up
concrete slab Waterproofing membrane drainage layer Filter growing medium vegetation layer
What is the cost of a green roof
£350/m2
What is a green roof build-up
concrete slab Waterproofing membrane drainage layer Filter growing medium vegetation layer
