1. The vertical portion between each tread on the stair is called:
Correct Answer is : Riser
2. Baluster in a stair is the _________ member supporting _________
Correct Answer is : Vertical, handrail
3. How many types of stairs are there based on the material?
4. Speed of an escalator is usually:
Correct Answer is : 25-30m/min
5. The space housing the stairs is called:
Correct Answer is : Staircase