Construction Technology and Environmental Services Flashcards
(21 cards)
what are the different types of foundations?
Concrete strip
Raft
Pile
What are the advantages and disadvantages of strip foundations
Advantages
- Quicker to construct
- Cheaper
- Can be adapted to different structures
Disadvantages
- Not suitable for all building
- Not as strong as other types of foundations
- Not suitable with poor shallow soil conditions
What are the advantages and disadvantages of raft foundations
Advantages
- can be provided where the shallow foundation is necessary but soil condition is poor.
- It resists differential settlement
- can be considered as a floor slab so reduced cost for a floor slab
Advantages
- Edge corrosion
- More expensive that strip foundations
What are the advantages and disadvantages of pile foundations
Advantages
- High bearing capacity making it suitable for structures with heavy loads
-Suitable for areas with weak shallow soil conditions.
- Pile foundations can be adapted to different types of soil, including cohesive, non-cohesive, and mixed soils, allowing for flexibility in construction projects.
Disadvantages
- More expensive
- Noise and vibration
- longer time
What are the types of external wall systems use on construction projects
Cavity Wall
Rainscreem cladding
Curtain wall
Solid walls
What is timber frame construction
Prefabricated external and internal stud walls, floor joists and roof trusses to form the super-structure which is a complete structural frame that transfers the vertical and horizontal loads to the foundations.
What design aspects did you consider on you heather house project
- A the sizes of change rooms required
- Fatalities required to be provided
What are the requirements by sports England which impacted the design.
Ensuring access to disable users
Separation of changing and wet and muddy areas from any social and indoor sports accommodation
Provide well considered entrance and lobbies and make provision for boot cleaning
Good external lighting, security systems and CCTV installation.
What is the construction methodology of a pile foundations
Construction of a piling male
CFA - A piling rig soil in excavated a at the same time concrete is being pumped into the ground
Bore Piles - hole is excavated in the ground, a reinforcement change is then put in and concrete is poured
Driven piles - Precast concrete piles are driven in direct into the ground using a piling machine
On King Hill - What are the advantages did you advise the client on a still frame over a concrete frame?
Advantages
- Speed of construction
- Typical allows for longer spans
- Can be fabricated off site
- Lower embodied carbon
Disadvantages
- Less flexibility - Cannot be altered on site
- Required fire protection
- Insulation required to improve thermal conductivity.
How did you advise the client that a modular building was the most efficient in terms of time and cost?
I did a soft market test on the design based on the indication design prepared by the architect. The supplier also advised on the lead time of the unit and I compared this against the steel frame proposed
What is the difference between approve document and building regulations
Approve documents provides guidance on ways to meet the building regulations
You mention a prefabricated unit was the most efficient over time and cost over a steel frame construction why would people still us a steel frame contract if prefabricated modules where for efficient in terms of time and cost?
Steel frame structure would be more cost effective against a more bespoke modular system.
Less contractors have experience with modular contractors
What is the difference between stick cladding and unitise cladding?
Stick cladding – Unit that is assembled on site
Unitised cladding – prefabricate on site
What is the difference between pad and pile foundations?
Pad foundation is a shallower type of foundation constructed as reinforce concrete cube blocks. Pile foundation is deep type of foundation used where there is unstable shallow ground conditions.
On the Kings Hill project, please can you tell us about your advice to the client on the frame for the project? What were the client’s requirements and what was your advice?
Th client’s requirement was to provide a community space with an open space, they also required the project to be built on a short timescale. There I advised a steel frame typical allows for wider span with the need for column, although thought this would need to be confirm by the structural engineer, steel from offer quicker construction solution.
On the SEROC Godstone project, you advised that the modular unit was more efficient in terms of time and cost. Please could you explain how you gathered the data to provide this advice?
I was able to approach a contractor as a design with the design proposal for the architect who was able to advise on a cost, he was also able to provide timescales for the installation.
On the SEROC Godstone project, you advised the client of time and cost aspects. Did the client have any requirements in terms of buildability or lifespan of the outbuilding?
This was not a specific requirement for the client. but the architect was design building relevant standards
On the Heather House project, you had to consider the minimum standard requirements for changing room facilities. Please could you tell us what these are?
There was a requirement for a clear separation between changing room and shower rooms, Ben for changing for have to be at least wide per person, there was a requirement for a separate referee changing facility.
With reference to facade types – Can you briefly describe 3 different types?
- Traditional face brick and cavity wall.
- Glazed curtain wall.
- Combination glazed, face brick rainscreen cladding.
What are the advantages and disadvantages of steel frame verses concrete frame.
Steel frame (advantages)
Lighter
More sustainable
Speed of construction
Steel Frame (disadvantages)
Needs fire protection.
Poor sound damping without additional treatment.
Variable price of steel, dependant on foreign markets.
Long lead time.
