Chapter 5

Question 1

uses for metal staircase

Answer 1

• escape stairs
• accomodation stairs

Question 2

materials used for construction of staircase

Answer 2

• mild steel
• aluminium alloy

Question 3

advantages of metal staircase

Answer 3

• no need for formwork
• no hoisting equipment is required

Question 4

disadvantages of metal staircase

Answer 4

• more expensive
• takes a longer time to fabricate
• requires regular maintenance

Question 5

types of metal stairs

Answer 5

• steel escape stair
• steel spiral stair (used for: situations where plan area is limited)
• steel string beam stair (used for: accommodation stairs that need to be light and elegant in appearance)
• aluminium alloy stair (used for: accommodation stairs in offices and flats)

Question 6

structural steel stairs components

Answer 6

• tread
• stringers
• supporting beam
• special pans