According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?

Related Mcqs:

1. If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is_______________?

   A. K/x (1 + x/d) + bw
   B. Kx (1 – x/l) + bw
   C. Kx (1 + x/l) + bw
   D. All the above

2. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?

   A. WL/12 (L – 2D/3)²
   B. WL/10 (L + 2D/3)²
   C. WL/10 (L – 2D/3)²
   D. WL/12 (L – D/3)²

3. If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is________________?

   A. 200 cm
   B. 300 cm
   C. 150 cm
   D. 100 cm

4. The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is______________?

   A. 35
   B. 25
   C. 30
   D. 20

5. If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by

   A. (5/6) (r/1 + r²) M
   B. (5/6) (r²/1 + r²) M
   C. (5/6) (r²/1 + r3) M
   D. (5/6) (r²/1 + r4) M

6. The effective width of a column strip of a flat slab, is_______________?

   A. One-fourth the width of the panel
   B. Half the width of the panel
   C. Radius of the column
   D. Diameter of the column

7. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is_________________?

   A. 25
   B. 30
   C. 35
   D. 40

8. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept_______________?

   A. 4.5 m
   B. 4.0 m
   C. 3.5 m
   D. 3.0 m

9. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is____________________?

   A. 0.6
   B. 0.7
   C. 0.8
   D. 0.9

10. An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is__________________?

    A. Safe in shear
    B. Is safe with stirrups
    C. Is safe with stirrups and inclined members
    D. Needs revision of the section