Necessity of Codes and Specifications

IS 456: 2000

As a practicing civil engineer in organisation or as a student in college, you might have taken a reference from the design codes and specifications.

Why these codes are obligatory?

What is a code?

  • In short, a code represents the consensus of opinion of experienced engineers and professionals.

  • These codes provide the guidelines for the design and construction of structures. They are revised at regular intervals to reflect new developments based on the experience gained from past design practice, behavior of existing structures, and failure of structures.

  • Codes contain the recommended loads for a given locality and the recommended fire and corrosion protection. They also contain rules governing the ways in which loads are to be applied and design rules for steel, concrete, and other materials.

Guidelines for Choosing Dimensions and Reinforcement of Beams

Codes and Specifications:

The codes serve at least the following four distinct functions:

1. They ensure adequate structural safety, by specifying certain
essential minimum requirements for the design.

2. They aid the designer in the design process. Often, the results of
sophisticated analysis are made available in the form of simple
formulae or charts.

3. They ensure consistency among different engineers.

4. They protect the structural engineer from disputes, though codes
in many cases do not provide legal protection.

Project specifications along with the design drawings are given to the builder by the architect or project manager. These specifications and the way in which the drawings are prepared and presented vary from organization to organization.

They include the following items:

1. Materials that must be used in the structure

2. Sizes of structural members

3. Joint details

4. Expected quality and tolerance

5. Instructions on how the construction work is to be done.

Read More: Structural Design Considerations