42801. The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
42802. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
42803. An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
42804. In a slab, the pitch of the main reinforcement should not exceed its effective depth
42805. In a prestressed member it is advisable to use
42806. The ratio of the breadth to effective depth of a beam is kept
42807. Spacing of stirrups in a rectangular beam, is
42808. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
42809. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is
42810. Steel bars are generally connected together to get greater length than the standard length by providing
42811. Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory
42812. By over-reinforcing a beam, the moment of resistance can be increased not more than
42813. The minimum thickness of a flat slab is taken
42814. 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
42815. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
42816. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
42817. An R.C.C. column is treated as short column if its slenderness ratio is less than
42818. If the tendon is placed at an eccentricity e below the centroidal axis of the lon-gitudial axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge
42819. The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is
42820. If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is
42821. The load stress of a section can be reduced by
42822. For M 150 grade concrete (1:2:4) the moment of resistance factor is
42823. For a ribbed slab
42824. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
42825. The neutral axis of a T-beam exists
42826. A pre-stressed concrete member is preferred because
42827. If W is the uniformly distributed load on a circular slab of radius R fixed at its ends, the maximum positive radial moment at its centre, is
42828. A very comfortable type of stairs is
42829. If the neutral axis of a T-beam is below the slab, the relationship between the flange width B, depth of neutral axis n, thickness of the slab ds, effective depth of the beam d, gross area of tensile steel At and the modular ratio m may be stated as
42830. A ribbed slab is provided for
42831. For a number of columns constructed in a rcjw, the type of foundation provided, is
42832. As the percentage of steel increases
42833. If W is weight of a retaining wall and P is the horizontal earth pressure, the factor of safety against sliding, is
42834. Based on punching shear consideration, the overall depth of a combined footing under a column A, is
42835. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
42836. Pick up the assumption for the design of a prestressed concrete member from the following :
42837. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is
42838. Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds
42839. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is
42840. 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
42841. The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes
42842. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds
42843. Enlarged head of a supporting column of a flat slabs is technically .known as
42844. If the length of a combined footing for two columns l metres apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where x is the distance of centre of gravity of column loads).
42845. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stressess simultaneously, is called
42846. The width of the flange of a L-beam, should be less than
42847. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is
42848. The weight of reinforced concrete, is generally taken as
42849. The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is
42850. If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by
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