Can wind and earthquake loads be applied together in a load combination?

No, Clause 8 explicitly states that maximum wind and seismic loads shall not be considered to act simultaneously.

Does this code provide the partial safety factors for Limit State Design?

No, while it lists the basic load combinations, the specific partial safety factors (like 1.5 DL + 1.5 LL) are detailed in the respective material codes (IS 456 and IS 800).

What special loads are covered in Part 5?

It covers temperature changes, hydrostatic pressure, soil/earth pressure, fatigue, and accidental loads such as vehicular impact and explosions.

IS 875 Part 5

: 1987

Design Loads (Other than Earthquake) for Buildings and Structures - Special Loads and Load Combinations

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IS 875 Part 5 outlines the standard load combinations to be considered for structural design, ensuring structural stability under multiple simultaneous load actions. It also specifies how to account for special loads like temperature variations, hydrostatic pressure, earth pressure, and accidental impact.

Covers special loads like erection loads, accidental loads, and defines load combinations for structural design.

Quick Reference Values

Increase in permissible stress for Wind/Seismic combinations33.33% (for working stress design)

Reduction factor for transient load combinations (DL + IL + WL/EL)0.75

Simultaneous Wind and Seismic load combination factor0 (Not considered simultaneously)

Practical Notes

Wind load and Earthquake load must never be considered to act simultaneously on a structure.

While this code gives the foundational logic for load combinations, engineers typically rely on IS 456 (for concrete) and IS 800 (for steel) for the exact Limit State Design partial safety factors.

Always account for thermal expansion/contraction (Clause 3) in long continuous structures like bridge decks or large factory sheds.