Construction Technology

Question 1

What are retaining walls?

Answer 1

A retaining wall holds back the soil behind it

Question 2

Can you give me some types of retaining wall please?

Answer 2

• Gravity - depends on its own weight only to resist the pressure
• Gabion - basket structure, can be used as a more aesthetically pleasing alternative
• Cantilevered - made of concrete, has a base slab
• Sheet piling - temporary measure where piles are driven into the ground

Question 3

What is the standard size of a brick and how many per m2?

Answer 3

215mm x 102.5mm x 65mm
60 bricks per m2

This size is commonly used in construction for standard bricks.

Question 4

What are some of the different types of bricks?

Answer 4

• Facing - used for external walls offering aesthetic appeal
• Common - less aesthetically pleasing than facing bricks for covered areas
• Engineering - higher strength and durability suitable for harsh environments
• Glazed - bricks that have been ceramic coated to create a glossy surface, used for aesthetic purposes

Each type of brick serves different purposes in construction.

Question 5

What are the advantages and disadvantages of glazed bricks?

Answer 5

• Advantages: aesthetic appeal, durable to ceramic layer
• Disadvantages: expensive, susceptible to damage

Glazed bricks are often chosen for their visual appeal but come with higher costs and potential fragility.

Question 6

What are the advantages and disadvantages of steel frames?

Answer 6

Advantages: quick to erect, recyclable, beams can span long distances

Disadvantages: needs intumescent paint for fire protection, lower load bearing capacity, price is volatile

Question 7

What are the advantages and disadvantages of concrete frames?

Answer 7

Advantages: fire resistant, cladding can be fixed direct to frame, sound and heat insulation, high load bearing strength

Disadvantages: slower to construct, does not span as well as steel, bulky structure

Question 8

What factors do you need to consider when selecting structural frame?

Answer 8

• Programme
• Fire protection
• Market conditions
• Sustainability objectives