Draft Standard for Comments Only CED 39(22345)WC
April 2023
structures in separate parts, to keep abreast with rapid developments and extensive
research carried out in earthquake-resistant design of various structures. Thus,
IS 1893 is split into 11 Parts, namely:
Part 1: General provisions
Part 2: Buildings
Part 3: Liquid retaining tanks
Part 4: Bridges and retaining walls
Part 5: Industrial structures
Part 6: Base isolated buildings
Part 7: Pipelines
Part 8: Dams and embankments (to be formulated)
Part 9: Coastal structures (to be formulated)
Part 10: Steel towers (to be formulated)
Part 11: Tunnels (to be formulated)
This standard contains provisions specific to earthquake-resistant design of buildings.
Unless stated otherwise, the provisions in this part of IS 1893 shall be read necessarily
in conjunction with the general provisions as laid down in IS1893 (Part 1). Also, the
provisions of buildings in IS1893 (Part 2) are presented in 7 sections, namely:
Section 1: Additional Criteria for All Buildings
Section 2: Additional Criteria for Masonry Buildings
Section 3: Additional Criteria for Concrete Buildings
Section 4: Additional Criteria for Steel Buildings
Section 5: Additional Criteria for Adobe Buildings
Section 6: Additional Criteria for Steel-Concrete Composite Buildings
Section 7: Additional Criteria for Timber Buildings
However, in this standard (seventh revision), the following major changes have been
included:
Section 1: Additional Criteria for All Buildings
a) Response reduction factors have been modified and renamed as Elastic
force reduction factors;
b) Importance factors have been adjusted in view of the revision in the hazard
levels;
c) Provisions on torsion have been improved;
d) Provisions on buildings have been harmonized from relevant provisions
given in IS 4326, IS 13826, IS 13827 and IS 15988; and
e) Additional provisions have been added for earthquake resistant design of
critical and lifeline buildings.
Section 2: Additional Criteria for Masonry Buildings
a) Provisions on buildings have been harmonized from IS 4326 and IS 15988;
and
b) The admissibility of different structural systems in the earthquake zones is
clarified.
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Draft Standard for Comments Only CED 39(22345)WC
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Section 3: Additional Criteria for Concrete Buildings
a) The admissibility of different structural systems in the earthquake zones is
clarified; and
b) The structural plan density of the structural walls is varied with the
earthquake zone and category of the building.
Section 4: Additional Criteria for Steel Buildings
a) New provisions have been prepared for steel buildings; and
b) The structural plan density of the structural walls is varied with the
earthquake zone and category of the building.
Thus, a parallel series of standards on design & detailing of structures will be
formulated under IS 13920 (Parts 1 to 11) and another series of standards on safety
assessment and retrofitting of structures under IS 13935 (Parts 1 to 11).
In the formulation of this standard, effort has been made to coordinate with standards
and practices prevailing in different countries in addition to relating it to the practices
in the field in this country. Assistance has particularly been derived from the following
publications:
a) IBC 2021, International Building Code, International Code Council, USA,
2021;
b) NEHRP 2020, NEHRP Recommended Provisions for Seismic Regulations
for New Buildings and Other Structures, Volume I: Part 1 Provisions, Part 2
Commentary, Report No.FEMA P2082-1, Federal Emergency Management
Agency, Washington, DC, USA, September 2020;
c) ASCE/SEI 7-22, Minimum Design Loads for Buildings and Other Structures,
American Society of Civil Engineers, USA, 2022;
d) NZS 1170.5: 2016, Structural Design Actions, Part 5: Earthquake Actions –
New Zealand, Standards New Zealand, Wellington, New Zealand, 2016;
e) JICA, Specifications for Highway Bridges, Part IV, Japan International
Cooperation Agency, 1994
The compostion of the Committee including the Drafting Group responsible for the
formulation of this standard will be included later (after finalization) in Annex B.
This standard contributes to the following Sustainable Development Goals: Goal 9
'Industry, Innovation and Infrastructure' towards building resilient infrastructure,
promote inclusive and sustainable industrialization and foster innovation; and Goal
11 'Sustainable cities and communities' towards making cities and human settlements
inclusive, safe, resilient and sustainable.
For the purpose of deciding whether a particular requirement of this standard is
complied with, the final value observed or calculated, expressing the result of a test or
analysis, shall be rounded off in accordance with IS 2: 2022 'Rules for rounding off
numerical values (revised)'. The number of significant places retained in the rounded
off value should be the same as that of the specified value in this standard.
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Draft Standard for Comments Only CED 39(22345)WC
April 2023
DRAFT STANDARD FOR COMMENTS ONLY
(Not to be reproduced without the permission of BIS or used as a Standard)
Draft Indian Standard
CRITERIA FOR EARTHQUAKE RESISTANT DESIGN OF
STRUCTURES
PART 2 BUILDINGS
[Seventh Revision of IS 1893 (Part 1)]
SECTION 1
ADDITIONAL CRITERIA FOR ALL BUILDINGS
1 SCOPE
The provisions of this section shall be applicable to all buildings covered in Section 2
to 7.
1.1 Masonry Buildings
1.1.1 Section 2 of this standard deals with the selection of materials, special features
of design and construction for earthquake resistant masonry buildings, including
masonry construction using rectangular masonry units, timber construction and
buildings with prefabricated flooring/roofing elements.
1.1.2 Guidelines for earthquake resistant buildings constructed using masonry of low
strength and earthen buildings are covered in IS 13826 and IS 13827.
1.2 Concrete Buildings
Section 3 of this standard deals with the selection of materials, special aspects related
to design and construction for earthquake resistant concrete buildings.
1.3 Steel Buildings
Section 4 of this standard deals with the selection of materials, special aspects related
to design and construction for earthquake resistant steel buildings.
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 editions
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 the standards indicated in Annex A.
