Civil Engineering - RCC Structures Design - Discussion

Discussion Forum : RCC Structures Design - Section 2 (Q.No. 4)
For stairs spanning horizontally, the minimum waist provided is
4 cm
6 cm
8 cm
10 cm
12 cm.
Answer: Option
No answer description is available. Let's discuss.
26 comments Page 2 of 3.

Atul soni said:   5 years ago
The minimum waist of the stair is 1/25 to 1/30.

Hemanth H M said:   5 years ago
It should be 80 mm.

Uttam said:   6 years ago
Yes it should be 8 cm.
Ref: R.S. Khurmi/ conventional and objective type civil engineering book.

Hesan said:   6 years ago
Minimum width of stair 90 cm.
so minimum width of the waist will be 90cm.
Right answer 90 cm.

Madhupatel.b said:   6 years ago
Spanning horizontally is nothing but considering the design as a horizontal slab. Waist slab is the minimum distance of the stair upper surface to the lower slab bottom. That can be decided by the design. But for an RCC minimum slab width must be greater than 3.5 inches so we can say 80 mm.

Munna said:   6 years ago
The waist slab always 150mm,
So 120mn right answer.

Raj said:   7 years ago
80mm is the right answer.

Manish sahu said:   7 years ago
@Ali Baloch.

Spanning horizontally means horizontal member length and waist slab is that on which rise and tread constructed.

Ali Baloch said:   7 years ago
What is meant by spanning horizontally and what is meant by waist? Please explain.

Karthika said:   7 years ago
How? please explain.

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