Civil Engineering - RCC Structures Design - Discussion

Discussion Forum : RCC Structures Design - Section 1 (Q.No. 46)
46.
If T and R are tread and rise respectively of a stair, then
2R + T = 60
R + 2T = 60
2R + T = 30
R + 2T= 30
3R + 27 = 30
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Annonymous said:   3 years ago
@Muhammad Junaid.

Why Riser = 17 (why not 18 or 16)? Explain.
(1)

Muhammad Junaid said:   3 years ago
When.
No. of Risers = R = 17, &
No. of Treads = T = R-1 = 16, Then.
2R+T = 2(17)+16 = 60.

So, (A) is correct for,
R = 17 & T = 16.

Bittu said:   5 years ago
A is right, agree with the given answer.

Saravanan said:   6 years ago
Thanks @Sampad.

Sampad said:   7 years ago
Rise -150mm & trade -300mm.
R=15cm & T=30cm.
Then 2R+T=60.
2*15+30=60.
(4)

Roy said:   7 years ago
Thanks @Bikash.

Bikash kabiran said:   7 years ago
We know rise----150-180 for residential building and 120-150 for the public building.
Trade----200-250 for resi and 200-300 for public.
So, 2 * rise+trade = 600-640 mm.
Rise * trade = 40000-42000 mm^2.
Clear height between flight and head room=210cm.
Angle of flight=25° ---40°.
The Width of landing equal to the width of stairs.
(1)

Ganesh said:   9 years ago
2r+t > 55 and < 70.

George k george said:   9 years ago
Only when consider r=15 and t=30.

Ashul Gupta said:   1 decade ago
T=R-1
(A) 2R+T=60
R=20.33(NOT POSSIBLE FOR A FLIGHT).

(B) R+2T=60
R=61/3=20.33(NOT POSSIBLE).

(C) 2R+T=30
R=31/3=10.33 (POSSIBLE SINCE RISE NOT GREATER THAN 12 FOR ONE FLIGHT).

(D) R+2T=30
R=32/3=10.67 (POSSIBLE).

(E) 3R+2T=30
R=32/5=6.4(POSSIBLE).


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