Revised Standard from Last Update.

1. SCOPE

1.1 This standard covers the following design aspects of reinforced concrete (RC) buildings of height greater than 50 m, but less than or equal to 250 m. Generally, this standard is based on prescriptive approach and covers the following design aspects of tall buildings:

a) Selection of appropriate structural system;

b) Geometric proportioning of the building;

c) Integrity of structural system;

d) Resistance to wind and earthquake effects; and

e) Other special considerations related to tall buildings.

1.2 This standard is not applicable for tall buildings located in the near-field of seismogenic faults. For the purposes of this standard, near-field is taken as 10 km (shortest distance) from a seismogenic fault.

For buildings located within 10 km (shortest distance) of seismogenic faults, more rigorous approach is needed to proportion, analyze, design, detail and construct such buildings. The prescriptive requirements mentioned in this standard shall be used for proportioning such buildings, but more stringent specifications may be specified by the client/owner of the building or by the tall building committee appointed by the local authority administering the building project.

1.3 This standard is applicable only for buildings that house 20 000 or fewer persons.

1.4 This standard may also be used for design of buildings of height equal to or less than 50 m. The provisions of this standard will add value to the design of such buildings. However, this standard is not applicable for design of buildings of height more than 250 m.

1.5 This standard addresses the following typical structural systems of tall concrete buildings:

a) Structural wall systems;

b) Moment frame systems;

c) Moment frame – Structural wall systems;

d) Structural wall – Flat slab floor systems with perimeter moment frame;

e) Structural wall – Framed tube systems;

f) Framed-tube system;

g) Tube-in-tube system;

h) Multiple tube system;

j) Hybrid system; and

k) Any of the above with additional framing systems, for example, outrigger trusses, belt trusses and braced frames.

1.6 This standard shall be read along with all Indian Standards relevant to design and construction of buildings and structures. In case of conflict, clauses given in this standard shall be applicable.

1.7 For buildings that do not conform to the prescriptive requirements of this standard, a more rigorous procedure is necessary for design and review. The general procedure to be adopted is given in Annex B to proportion, analyze, design, detail, gain approval and construct such buildings. Performance objectives or procedures more stringent than those specified in Annex B may be specified by the client and/or owner of the building or by the tall building committee appointed by the local authority administering the building project.

2. REFERENCES

The standards listed in Annex A contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the edition indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards.