Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 1 (Q.No. 3)
3.
Under normal conditions using an ordinary cement, the period of removal of the form work, is :
7 days for beam soffits
14 days for bottom slabs of spans 4.6 m and more
21 days for bottom beams over 6 m spans
2 days for vertical sides of columns
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
32 comments Page 1 of 4.

Golam Murtoza said:   8 years ago
- Removal Time Period.

Walls, columns and vertical sides of beams 24 to 48 hours as may be decided by the Engineer-in-charge.
- Slabs (props left under) 3 days.
- Beam soffits (props left under) 7 days.
- Removal of props to slabs (Spanning up to 4.5 m) 7 days.
- Removal of props to slabs (Spanning over 4.5 m) 14 days.
- Removal of props to beams and arches (Spanning upto 6 m) 14 days.
- Removal of props to beams and arches (Spanning over 6 m) 21 days.
(14)

Sucharit Barua said:   10 years ago
Option D wasn't correct because all vertical form work of column, wall and beams should be removed within 16-24 hours.

Binay said:   8 years ago
I believe beam soffit means the cantilever portion of the beam. It is just a hunch, please correct me if I am wrong.

MATHIALAGAN said:   1 decade ago
Even 7 working days With props left under the external temperature 35 degree centigrade span up to 6 m.

RAJENDRA KUMAR said:   9 years ago
Minimum 10hours for vertical side columns but curing is regular 2 time/day, so 14 days.

MD Shekhar said:   8 years ago
A) Modification: *****7 days for beam soffits( props left as in their position).
(3)

Rustam Tomar said:   9 years ago
As per IS:456, Removal of formwork for vertical columns is between 16-24 hrs.

NILLA RAVITEJA said:   1 decade ago
30 hours is best for removal of form work for vertical sides of columns.

Engg chanchal said:   9 years ago
Beam slab and column casting in 20-24 hours remove at form work.

Faiz Khan said:   9 years ago
According to my thought, 7 day for beam soffits is sufficient.
(1)


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