Span to effective depth ratio for a continuous beam with steel grade of Fe 415 should not be more than 26.

Explanation:

Effective depth of a beam is the distance from the centroid of the tension reinforcement to the top surface of the beam. It is denoted by d. The span of a beam is the distance between the supports. The span to effective depth ratio is the ratio of the span of the beam to its effective depth.

The span to effective depth ratio is an important parameter in the design of reinforced concrete beams as it affects the strength and deflection of the beam. The limit on this ratio is imposed to ensure that the beam does not fail due to excessive deflection or bending.

For a continuous beam with steel grade of Fe 415, the span to effective depth ratio should not be more than 26. This means that the effective depth of the beam should be at least 1/26th of the span. For example, if the span of the beam is 10 meters, the effective depth should be at least 10/26 = 0.38 meters.

The limit on the span to effective depth ratio is based on the assumption that the beam is simply supported and subjected to a uniformly distributed load. In reality, beams are often subjected to more complex loading conditions and the limit on the span to effective depth ratio may need to be adjusted accordingly.

In conclusion, the span to effective depth ratio is an important parameter in the design of reinforced concrete beams. For a continuous beam with steel grade of Fe 415, the span to effective depth ratio should not be more than 26 to ensure the strength and deflection of the beam are within acceptable limits.

As per IS 456:2000 code for control the deflection it's value not goes beyond this limit 26 in continuous beam