IS 3861: Method of Measurement of Plinth, Carpet and Rentable Area of Buildings

10 Pages·2002·1.1 MB·English

by  Bureau of Indian Standards

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IS 3861 (2002): Method of Measurement of Plinth, Carpet and
Rentable Area of Buildings [CED 44: Methods of Measurement
of Works of Civil Engineering]
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IS 3861:2002
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Indian Standard
METHOD OF MEASUREMENT OF PLINTH,
CARPET AND RENTABLE AREAS OF BUILDINGS
(Second Revision )
ICS 91.060.01; 91.200

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@BIS 2002
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW D ELHI 110002
May 2002 Price Group 2
Methods of Measurement of Works of Civil Engineering ( Excluding River Valley Projects ) Sectional
Committee, CED 44
FOREWORD
This Indian Standard ( Second Revision ) was adopted by the Bureau of Indian Standards, after the draft
finalized by the Methods of Measurement of Works of Civil Engineering ( Excluding River Valley Projects )
Sectional Committee had been approved by the Civil Engineering Division Council.
Different methods for calculating plinth/carpet areas of buildings were being followed by various departments.
This standard was, therefore formulated in 1966 to provide abasis for uniform method of measurement of such
areas of buildings. First revision of the standard was brought out in 1975 to include rentable area of the
buiIding on the basis of recommendations of Central Public Works Department; also, provisions relating to
cubical contents were deleted as these are generally not followed.
This second revision of the standard has been taken up in light of experience gained with the use of the
standard and feedback received from time to time. Following are the principal modifications incorporated in
this revision:
a) the list of the items whose areas can not be clubbed together has been made more exhaustive by
including additional items where it was found desirable to measure their areas separately;
b) the areas to be included in case of verandah, balcony and alcove for measurement of plinth area have
been detailed;
c) provision for measurement of areas of walls owned jointly by different owners has been added, for the
purpose of measurement of plinth area; and
d) details on various types of internal shafls/ducts, for the purpose of inclusion of their areas in the
calculation of plinth areas has been made exhaustive.
This standard disallows the use of non-standard terminologies like super built areas.
The composition of the Committee responsible for the formulation of this standard is given in Annex A.
For the purpose of deciding wheth er aparticular requirement of this standard iscomplied with, the final value,
observed or calculated, expressing t he result of a test or analysis, shall be rounded off in accordance with
IS 2: 1960 ‘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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IS 3861:2002
Indian Standard
METHOD OF MEASUREMENT OF PLINTH,
CARPET AND RENTABLE AREAS OF BUILDINGS
(Second Revision )
1 SCOPE 2.8 Porch
This standard covers method of measurement of Itisacoveredstructuresupportedonpillarsorotherwise
plinth, carpet and rentable areas of old and new for the purpose of pedestrian or vehicular approach
buildings. to abuilding.
2 TERMINOLOGY 3 GENERAL
2.0 For the purpose of this standard, the following 3.1 Linear measurement shallbemeasured tonearest
definitions shall apply. 0.01 m, and areas shall be worked out to the nearest
0.01m2.
2.1 Plinth Area
3.2 Theareasofeachofthefollowing categories shall
Plinth area shall mean the built-up covered
be measured separately and shall not be clubbed
measured atthe floor level ofthe basement orof any
together:
storey (see 4 ).
a) Basement;
2.2 Carpet Area
b) Floor without cladding (stilted floor);
Carpet area shall mean the floor area of the usable
rooms atany floor level (see 5). c) Floorsincludingtopfloorwhichmaybepartly
covered;
2.3 Rentable Area
d) Mezzaninefloorincludingadditional floorfor
Rentable area shall mean the carpet area atany floor
seating in assembly building/theatre,
level including areas as detained in6.
auditorium, etc;
2.4 Balcony
e) Garage;
Ahorizontal projection with ahand-rail, balustrade
or aparapet, to serve aspassage or sitting out place. 9 Accommodation for service staffi

g) Stair cover (mumty );
2.5 Mezzanine Floor
h) Machine room;
Anintermediatefloorinbetweentwomainfloorshaving
minimum height of2.2 mfrom the floor andhaving a -0 Porch; and
proper and permanent access to it.
k) Towers, turrets, domes projecting above the
NOTE— Where rules of the local bodies permit terrace level atterrace.
intermediate floor ofminimum 1.8mclear height, these
be also considered asmezzanine floor for thepurpose 4 MEASUREMENT OF PLINTH AREA
of measurement.
4.1 Plinth area shall be the built up covered areas
2.6 Stair Cover (Mumty ) measuredforthecategories mentioned in3.2 andshall
include such areas asgiven in4.1.1 and exclude the
Itis a structure with a roof over a staircase and its
areas given in 4.1.2.
landing,builttoenclose onlythestairsforthepurpose
of providing protection from weather and not used 4.1.1 For the purpose ofplinth area, following shall
for human habitation. be included:
2.7 Loft a) Area ofthe wall atthe floor level excluding
plinth offsets, if any; when the building
Astructure providing intermediate storage space in
consists of columns projecting beyond
between two main floors without having apermanent
cladding, the plinth area shall be taken up
access and at a height not less than 2.0 m from the
to the external face of cladding ( in case of
floor below.
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IS 3861 :2002
corrugated sheet cladding outer edge of a) Door and other openings in the wall;
corrugation shall be considered );
b) Pillars, intermediate pillars, supports orany
NOTE — In case.acommon wall isownedjointly other suchobstruction within the plinth area
by two owners, only half the area of such walls irrespective oftheir location;
shall be included in the plinth area of oneowner.
c) Pilaster along wall exceeding 300 cm2 in
b) Shafts forsanitary,watersupply installations,
area;
garbage chute,telecommunication, electrical,
fire fighting, air-conditioning and lifts; d) Flues which are within the wall;
c) Stair case; e) Built-incupboard,almirahandshelfappearing
within aheight of2.2 mfrom floor; and
d) In case of open verandah with parapets:
o Fire place projecting beyond the face ofthe
1) 100percentareasfortheportionprotected
wall inliving orbed room.
by the projections above, and
5.1.2 The following shall be excluded from the wall
2) 50 percent area for the portion
area:
unprotected from above.
a) Pilaster along wall notexceeding 300 cm2in
e) 100percent area ofthe balcony protected by
area, and
projection above and 50 percent area ofthe
unprotected balcony; and b) Chullah platform projecting beyond the face
ofthewall.
9 Incaseofalcove madebycantilevering aslab
beyond external wall: 5.2 The carpet area shall be the area worked out as
in5.1 excluding the area ofthe following portion:
1) 25 percent of the area for the alcove of
height upto 1m, a) Verandah;
2) 50 percent of the area for the alcove of b) Corridor and passage;
height more than 1mand upto 2m,and
c) Entrance hall and porch;
3) 100percent ofthe area forthe alcove of
d) Staircase and stair-cover ( mumty )
height more than 2m.
(see Note);
4.1.2 The following shallnotbeincluded intheplinth
e) Shaft and machine room for lift;
area (see 2.1 ):
f) Bathroom and lavatory;
a) Area of loft;
@ Kitchen and pantry;
b) Area of architectural band, cornice, etc;

h) Store;
c) Area of vertical sun breaker or box louver
projecting outandotherarchitecturalfeatures, Jo Canteen;
forexampleslabprojection forflowerpot,etc;
k) Air-conditioning duct and plant room; and
d) Open platform;
m) Shaft for sanitary/water supply installations
e) Terrace; andgarbagechute,electrical andfirefighting,
air-conditioning, telecommunication, lift.
O Open spiral/service stair cases; and
NOTE — In a hall or basement, areas of portion I m
g) Areaofmumty,machineroom,towers,turrets,
beyond last stepshall bepart of the staircase.
domes projecting above terrace level.
5.2.1 The carpet areas of category mentioned
5 MEASUREMENT OF CARPET AREA in3.2 b), e), g), h), k) and m) are not required to be
calculated.
5.I From the plinth area asworked out in4,the area
of the wall shall be deducted ( see also 5.1.1, 5.1.2 6 MEASUREMENT OF RENTABLE AREA
and 5.2 ). Thickness of wall shall be inclusive of
finishes. 6.1 Residential Buildings
NOTE — The various dimensions couldbemeasured 6.1.1 Therentable areashallbecarpet areaasworked
out in5but shall further include the following:
internally or externally.
5.].1 The following shall be included in the wall a) The carpet area of kitchen, pantry, store,
area: lavatory, bath room; and

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IS 3861:2002
b) Fifty percent ofcarpet area ofunglazed and 6.2 Non-Residential Buildings
100percent ofglazed verandah.
The rentable area shall be carpet area asworked out
6.1.1.1 Itshall, however, exclude thecarpet area in 5 increased by the carpet area of the canteen
of the covered portion of the building specified including store, kitchen and pantry attached to it.
in 5.1 such as storage space on top landings of
6.2.1 It shall, however, not include carpet areas of
staircase, under first landing andwaist slab on floor
bathroom and lavatory.
one.
6.2.2 While accounting the rentable area for the
6.1.2 While accounting the rentable area for
category mentioned in3.2 b), one-fourth carpet area
category mentioned in3.2 b), one-fourth carpet area
shall be accounted for.
shall be accounted for.
1S3861 :2002
ANNEX A
( Foreword)
COMMITTEE COMPOSITION
Methods of Measurement of Works of Civil Engineering
(Excluding WaterResources Development Division) Sectional Committee, CED 44
Organ izalinn Representative(s)
In Personal Capacity ( B-X/, 809{,Vasant Kunj, New Delhi ) SHRIO. P.Gorx ( Chairman )
Builders Association of India, Mumbai SHIGB. G. AHUIA
Calcutta Port Trust, Kolkata SHRIBINAYKUMARRAY
SHR[AMARNATHRAY(Alternate )
Central Public Works Department, New Delhi SUPt]RINT~NDINtEiN~IN~ER( S & S )
EXtZUTW~ENCiINEER( S & S ) (Alternate )
Central Water Commission, New Delhi DtR~CTOR(COSTENGINEERHYDROPOWER)
Dnwcmm ( COSTENGINEERIRRIGATION)
(Alternate )
Coal India Limited, Kolkata CHIIT ( CIVIL ENGINIXR-iRRIGATION)
SHIUS. K. MITRA(Alternate )
Engineers India Limited, New Delhi SHRIA. K. TANMN
Engineer-in-chief’s Branch, New Delhi SHRIJ. S. KHANNA
SHRIG. S. MEHTA(Alternate )
Gammon India Limited, Mumbai SHRIA. D. ALAWANI
SHRiS. N. SANYAL(Alternate )
Haryana Irrigation Department, Manimajra CHW EN~INFiIIK( R & D )
SUIWRINT~NtNNGENGtNEER(Alternate )
Hindustan Steel Works Construction, Kolkata SHRID. M. RAO
SHR1S. K. SAGAR(Alternate )
[n Personal Capacity (MD/70, Sector C, Aliganj, Lucknow DRR. B. SINGH
~261)&? )
In Personal Capacity ( E-39A, East qfKailash, New Delhi SHRIBAI.IHRV~RMA
I1OO6I )

In Personal Capacity ( Ist,flmm 1/180 1 Chitranjan Park, SHRIR. P.LAHIRI
New Delhi 110019 )
Indian Roads Congress. New Delhi Smu DEtWAKNARAYAN
SHR[PRAtSHATKRISHNA(Alternate )
Institution of Surveyors, New Delhi SHRIK. S. KHARI
M. N. Dastur & Company Limited, Kolkata SHRIN. K. BASU
SHRIS. K. GUHA(Alrernate )
Ministry of Surface Transport ( R. W. ), New Delhi SHRIS. C. SHARMA
SHRIA. S. SRWASTAVA(Alternate )
Public Works Department, New Delhi CHUZFENtNNEH?
Public Works Department, Navi Mumbai SHRIP. K. NINAVE
SUPERiNTENIXNGErw3tm3R ( 13UlLDINCi)
(Afrernate )
BIS Directorate General Smu S. K. JAIN,Director and Head(CivEngg )
[Representing Director General ( Ex-o~ficio ) ],
Member-Secretary
SHRIR. K. GUrTA
Joint Director ( Civ Engg ), BIS

4
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This Indian Standard has been developed from Doc :No. CED 44 ( 5230 )
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
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