Construction Technology Flashcards
1
Q
Can you talk me through the build-up of a new build ground bearing floor slab?
A
- Hardcore
- Sand blinding
- Damp proof membrane (DPM)
- Reinforced concrete
- Insulation
- Vapour Control Layer (VCL)
- Screed
2
Q
What is sub-structure?
A
- All the structures below the ground level and the super-structure including the ground floor bed, piles foundations and basement walls.
- The sub-structure transfers the load of the building to the ground and isolates it from the ground horizontally.
3
Q
What is super-structure?
A
All internal and external structures above the sub-structure:
- Primary elements: walls, stairs, roof, structural walls and
- Secondary: suspended ceilings, raised floors, doors, windows and finishes tiles, paint
4
Q
What is the external envelope?
A
The materials and components that form the external shell or enclosure of a building and it may be load or non-load bearing.
5
Q
What type of frame structures have you come across during the course of your work?
A
Steel and concrete frame.
6
Q
What are the advantages of steel frames over concrete frames? 5)What are the advantages of a concrete frame?
A
Steel Frame vs Cast in-situ concrete Frame
- Programme – Steel is quicker to erect and reduced time on site leads to reduced
overheads. - Quality control – Offsite fabrication means better quality control rather than insitu
concrete being poured on site. - Design flexibility – Longer metal frames mean less columns, however this can be
achieved with pre-cast concrete, and concrete can be formed into anything. - Sustainability - Steel is recyclable without any loss to quality, concrete is not.
Concrete buildings are more energy efficient due to buildings thermal mass. - Steel is more expensive; however, programme savings may make up for this.
- Concrete frames are usually cheaper, however take longer to build,
- Fire resistance - Concrete offers a better resistance to fire than steel.
