What are the main types of shelters specified in this code?

The code classifies shelters into types based on the degree of protection, such as Type A (Blast-resistant) and Type B (Splinter-proof).

What is the minimum earth cover required for a blast-resistant shelter?

For a Type A (Blast-resistant) shelter, a minimum of 1500 mm of earth cover over a 600 mm thick reinforced concrete roof is required.

What is the minimum floor area allocated per person in a shelter?

The code specifies a minimum floor area of 0.37 square meters per person.

Does this standard address nuclear fallout?

No, this code is focused on protection against blast waves and splinters from conventional explosives, not on radiological protection from nuclear fallout.

IS 5499

: 1969

Code of practice for construction of underground air-raid shelters in natural soil

CurrentRareCode of PracticeStructural Engineering · Functional Requirements in Buildings

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This code of practice provides guidelines for the design and construction of underground air-raid shelters in natural soil. It details requirements for site selection, structural design for protection against blast and splinters, ventilation, and sanitation to ensure occupant safety.

Code of practice for construction of underground air-raid shelters in natural soil

Quick Reference Values

Min. concrete roof for Type A (Blast-resistant) shelter600 mm

Min. earth cover for Type A (Blast-resistant) shelter1500 mm

Min. concrete roof for Type B (Splinter-proof) shelter300 mm

Min. earth cover for Type B (Splinter-proof) shelter600 mm

Minimum floor area per person0.37 m²

Minimum volume per person0.7 m³

Minimum clear height of shelter2.0 m

Practical Notes

This standard is largely obsolete in practice due to advancements in modern warfare, but its principles can inform the design of modern protective structures.

The design loads and protection levels are based on mid-20th-century conventional weaponry and do not account for modern guided munitions or nuclear effects.

Waterproofing and long-term ventilation are critical design considerations to prevent degradation and ensure the shelter remains habitable.