For bars in tension a standard hook has an anchorage value equivalent to a strength length of
Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than
The creep strains are
Ratio of compressive strength to tensile strength of concrete
In limit state design of concrete for flexure, the area of stress block is taken as
The fitness modulus of the fine aggregate is in the range of
According to IS:456-1978, the maximum reinforcement in a column is
The minimum cover in a slab should neither be less than the diameter of bar nor less than
If the permissible stress in steel in tension is 140 N/mm^2, Permissible stress in concrete in bending compression is 5N / mm^2. Then the depth of neutral axis for a singly reinforced rectangular balanced section will be
The slab is designed as one way if the ratio of long span to short span is