Construction Technology Flashcards
What is the optimal wall :floor ratio?
0.3-0.5
Can you name different types of piles?
Driven
Bored
Secant
Contiguous
CFA Pile
Sheet Pile
What’s the difference between a green roof and blue roof?
Green roof comprises of shrubs/vegetation to alleviate runoff water
Blue roof stores the water in a cavity and gradually releases water through drainage system
What are advantages of a blue roof?
Keeps buildings cool
Alleviates run-off water slowing down drainage
Prevents floods
What are advantages of a green roof?
Keeps buildings cool
Alleviates run-off water slowing down drainage
Prevents floods
Aesthically pleasing
What are the benefits of a SFS system over blockwork?
Cost: quicker to install, lightweight, programmer benefits, less prelims with plant and labour
How much is SFS?
Approx. £120/sqm
How much is blockwork wall?
Approx. £180/sqm
What’s typical net :gross?
0.7-0.8
What are different types of bridge?
Viaduct
Cantilever
Truss
Name 3 types of brick bonding and what’s the most expensive and why?
Stretcher bond
English Bond
Soldier Course
Flemish Bond
Soldier course due to additional work cutting brick, and intricate design
How do you price piling?
Excavation (m3)
Pile (m3)
Pile Mat (nr)
Pile rig (nr)
Pile Cap (m2)
What are the basement waterproofing grades
Grade 1 – 4
Grade 1 (basic utility) – Car park
Grade 2 (better utility) – plant room
Grade 3 (habitable) - resi or commercial space
Grade 4 (habitable) – Offices, restaurants, leisure centre, laboratory
What are the advantages and disadvantages of secant pile
Advantages:
Can be used where water retention required
Strong/robust foundation
Disadvantages:
Expensive
Not 100% waterproof
What is MVHR?
Mechanical Ventilation Heating Recovery
What is the difference between air source heat pumps and Combined Heat and Power (CHP) unit ?
Air Source heat pump uses outside air to produce heat and cooling whereas Combined heat and power unit also produces electricity.
Name three changes to building regulations that have come in the last 3 years that impact residential projects
Part L – conversation of fuel
Part O – Overheating
Building Safety Act 2024
What are the different forms of MMC?
Bathroom Pods
Pre-cast concrete
3D printing
Can you describe the difference between a secant pile and contiguous pile?
Contiguous sit side by side, Secant Piles have primary and secondary (soft & hard pile) which overlap one and other with the hard pile comprising reinforcement whereas soft pile is simply concrete
How would you get a Contractor to price the brickwork?
On a £/sqm basis, prime cost or Cost/1000 bricks
What is a PC Sum?
Allowance for material only to be included in a Contract Sum i.e., carpet at £/sqm and can be instructed against once specification confirmed
What factors affect the cost of the façade
Size, shape, design of the building, particularly height, material, labour (specialist), location, any particular requirements
