RCC Structures Design Set 5

If l1 and l2 are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w1 and w2 acting on strips parallel to l2 and l1 is

The minimum thickness of a flat slab is taken

Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension

The number of treads in a flight is equal to

An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm placed symmetrically along the circumference. If it carries a load of 40,000 kg axially, the stress is

If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

In a singly reinforced beam, the effective depth is measured from its compression edge to

The steel generally used in R.C.C. work, is

The advantage of reinforced concrete, is due to