Question

In Ultimate Load Method, the load used in the design of R.C.C. structures refer to.
1. total collapse load
2. working load multiplied by a load factor
3. working load divided by a load factor
4. plastic load

Answer 1

Correct Answer - Option 2 : working load multiplied by a load factor

Concept:

Characteristics Ultimate load method (ULM): -

1. It is also known as Load factor method or ultimate strength method.

2. The safety measure in the design is introduced by an appropriate choice of the load factor, which is defined as the ratio of ultimate load (design load) to the working load.

3. The satisfactory ‘strength’ performance at ultimate loads does not guarantee satisfactory ‘serviceability’ performance at the normal service loads.

4. This method results in more slender sections compared to WSM.

Hence,

The design load will be equal to working load multiplied by a load factor.