Indian Standards context for steel design: Which Indian Standard (IS) code specifically deals with the design and construction of steel structures used in buildings and allied works?

Introduction / Context:
Structural design in India is governed by a suite of Indian Standards that separately address materials, loading, and special actions such as seismic effects. Knowing which code applies to steel is foundational for safe and compliant design.

Given Data / Assumptions:

• We are selecting the Indian Standard that provides the core provisions for structural steel design.
• Other listed standards may be related to loads, concrete, or seismic actions, but are not the principal steel design code.

Concept / Approach:
IS 800 is the primary code for general construction in steel. It prescribes design philosophy, material properties, member design, connection design, and detailing requirements. IS 875 specifies design loads (dead, imposed, wind, etc.), which are then used in conjunction with IS 800 for steel buildings. IS 456 and IS 1343 pertain to concrete. IS 1893 covers seismic actions and is applied alongside material codes.

Step-by-Step Solution:

Verification / Alternative check:
Typical design workflow: obtain loads from IS 875, seismic forces from IS 1893, then design and detail steel members and connections per IS 800.

Why Other Options Are Wrong:
IS 875 and IS 1893 provide actions, not steel member design; IS 456 and IS 1343 are for concrete systems.

Common Pitfalls:
Confusing load codes with material design codes; mixing concrete and steel provisions.

Final Answer:
IS 800 (General Construction in Steel)