GUIDELINES
- The mean roof height of the building shall be the average of roof eve and highest point of roof surface, except for roof with slope <= 10°, mean roof height is permitted to be taken as the roof eve height.
1. Enclosed / Partially open building
Enclosed building: Total openings (windows / doors) in each wall shall be less than 4 sq.ft. or 1% of wall area.
Partially open building: The building that doesn’t satisfy any of the other conditions.
2. Partially enclosed building
Total area of openings in a wall exceeds the sum of others openings in the building envelope by 10%, AND the total area of openings in a wall exceeds 4 sq.ft. area or 1% of area of wall whichever is greater.
3. Open building
Each wall shall be atleast 80% open.
CASE A:
Least horizontal dimension = B
CASE B:
Least horizontal dimension = minimum of B1 & B2
Category 1 : Buildings and others structures with low risk to human life on failure.
Example: Agricultural facilities, temporary storage facilities, etc.
Category 2 : Buildings and others structures that are not covered under risk category 1, 3 & 4.
Example: small scale residential and commercial structures.
Category 3 : Buildings and others structures with substantial risk to human life or day to day civilian life on failure.
Example: small schools, day-care facilities, health care facilities, detention facilities, buildings with hazardous materials chemicals.
Category 4 : Essential facilities whose failure may cause substantial hazard to the community.
Example: hospitals, large health care facilities, water storage facilities, defence facilities, etc.