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IS 808 : 1989(Reaffirmed 1999)
Edition 4.1(1992-07)
Indian Standard
DIMENSIONS FOR HOT ROLLED STEEL BEAM, COLUMN, CHANNEL AND
B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Price Group 7
Structural Sections Sectional Committee, SMDC 6
FOREWORDThis Indian Standard (Third Revision) was adopted by the Bureau of Indian Standardson 6 April 1989, after the draft finalized by the Structural Sections Sectional Committee had beenapproved by the Structural and Metals Division Council.
Under the steel economy programme, a rational, efficient and economical series of IndianStandards on beam sections, channel sections and angle sections was evolved in 1957 andIS 808 : 1957 was published covering junior, light weight, medium weight, wide flange and heavyweight beam sections; junior, light weight and medium weight channel sections and equal andunequal leg angle sections. This standard was revised in 1964.
In the second revision of this standard, parts relating to medium weight beam sections — MBseries, column sections — SC series, channel sections — MC and MCP series and equal andunequal leg angles were revised and published as Parts 1, 2, 3, 5 and 6 of IS 808, respectively.Sections not covered in these parts, however continued in IS 808 : 1964.
In the present revision, the Sectional Committee felt it convenient to merge all the five parts intoone standard. The sections which were retained in IS 808 : 1964 subsequent to its second revisionin five parts are included in this standard with a view that these sections although not being rolledin the country at present may in future be rolled owing to their efficiency and resultant economy inthe use of steel. However, the designers are advised to check from JPC/producers regardingavailability of such sections.
Following additional modifications have been affected in this revision:a) Medium weight beam sections MB 100 having the flange width and web thickness of 70 mm
and 4.5 mm, respectively, has been modified to 50 mm flange width and 4.7 mm webthickness;
b) Two sections, namely, BFB 150 and RSJ 200 which are mainly used in railway electrificationhave been included as SC 150 and WB 200, respectively;
c) Additional equal leg angles 60 60 × 4, 100 100 × 7 (in place of 100 100 × 6.5), and 130 130 × 9have been included in the supplimentary list;
d) Amendments issued so far to the various parts of the standard and to IS 808 : 1964 have beenincorporated; and
e) Mass, area and other sectional properties have been expressed in three significant places.
This edition 4.1 incorporates Amendment No. 1 (July 1992). Side bar indicates modification of thetext as the result of incorporation of the amendment.
IS 808 : 1989
1
Indian Standard
DIMENSIONS FOR HOT ROLLED STEEL BEAM, COLUMN, CHANNEL AND
ANGLE SECTIONS
( Third Revision )1 SCOPE
This standard covers the nominal dimensions,mass and sectional properties of hot rolledsloping flange beam and column sections,sloping and parallel flange channel sectionsand equal and unequal leg angle sections.
2 REFERENCES
The Indian Standard IS 1852 : 1985 ‘Rolled andcutting tolerances for hot rolled steel products( fourth revision )’ is a necessary adjunct to thisstandard.
SECTION 1 GENERAL
3 TERMINOLOGY
3.1 Y-Y Axis
A line parallel to the axis of the web of thesection (in the case of beams and channels) orparallel to the axis of the longer flange (in thecase of unequal angles) or either flange (in thecase of equal angles) and passing through thecentre of gravity of the profile of the section.
3.2 X-X Axis
A line passing through the centre of gravity ofthe profile of the section, and at right angles tothe Y-Y axis.
3.3 U-U and V-V Axes
Lines passing through the centre of gravity ofthe profile of the section, representing theprincipal axes of angle sections.
4 SYMBOLS
4.1 Letter symbols used in this standard havebeen indicated appropriately in Sections 2 to 6.More explicit definitions for certain symbols,used in the figures and tables of Sections 2 to 6are given in 4.1.1 and 4.1.2.
4.1.1 Symbols for Dimensions
4.2.2 Symbols for Sectional Properties
A, B = the longer and the shorter leg lengthof angle section, respectively;
B = flange width of beam, column orchannel sections;
D = depth of beam, column or channelsection;
R1 = radius at fillet or root;
R2 = radius at toe;
t = thickness of web of beam, column orchannel section; thickness of leg ofangle section; and
T = thickness of flange of beam, columnor channel section.
a = sectional area,
C ( with subscripts x, y, u or v )
= distance of centre of gravity,
Cx = A – ex,
Cy = B – ey,
ex = distance of extreme fibre from X-Xaxis,
ey = distance of extreme fibre from Y-Yaxis,
Ix = moment of inertia about X-X axis,
Iy = moment of inertia about Y-Y axis,
Iu = moment of inertia ( Max ) about U-Uaxis,
Iv = moment of inertia ( Min ) about V-Vaxis,
M = mass of the section per metre length,
Zx = =modulus of section about X-Xaxis,
Zy = = modulus of section about Y-Yaxis,
rx = =radius of gyration about X-Xaxis,
Ixex-----
Iyey-----
Ixa-----
IS 808 : 1989
2
5 CLASSIFICATION
5.1 Beam, column, channel and angle sectionsare classified as follows:
5.1.1 Beams
a) Indian Standard junior beams (ISJB)
b) Indian Standard light weight beams(ISLB)
c) Indian Standard medium weight beams(ISMB)
d) Indian Standard wide flange beams(ISWB)
5.1.2 Columns/Heavy Weight Beams
a) Indian Standard column sections (ISSC)
b) Indian Standard heavy weight beam(ISHB)
5.1.3 Channels
a) Indian Standard junior channels (ISJC)
b) Indian Standard light weight channels(ISLC)
c) Indian Standard medium weight channels(ISMC)
d) Indian Standard medium weight parallelflange channels (ISMCP)
5.1.4 Angles
a) Indian Standard equal leg angles (ISA)
b) Indian Standard unequal leg angles (ISA)
5.2 The following abbreviated referencesymbols have been used in designating the
Indian Standard sections mentioned in 5.1:
6 DESIGNATION
6.1 Beam, columns and channel sections shallbe designated by the respective abbreviatedreference symbols followed by the depth of thesection, for example:
a) MB 200 — for a medium weight beam ofdepth 200 mm,
b) SC 200 — for a column section of depth200 mm,
c) MC 200 — for medium weight channel ofdepth 200 mm, and
d) MCP 200 — for a medium weight parallelflange channel of depth 200 mm.
6.2 Equal and unequal leg angles shall bedesignated by the abbreviated referencesymbols (∠ ) followed by the dimensions A, Band t. For example, 200 100 × 10 representsunequal leg angle of dimensions 200 mm,100 mm and thickness 10 mm.
7 DIMENSIONS, MASS AND TOLERANCES
7.1 Nominal dimensions and mass of beam,column, channel and equal and unequal anglesshall conform to the values given in Sections 2,3, 4, 5 and 6, respectively of the standard.7.2 Dimensional and mass tolerances of thevarious sections shall conform to theappropriate values stipulated in IS 1852 : 1985.
8 SECTIONAL PROPERTIES
Sectional properties of the beams, columns,channel and equal and unequal leg angles aregiven in Sections 2 to 6 for information.
ry = =radius of gyration about Y-Yaxis,
ru = =radius of gyration about U-Uaxis,
rv = =radius of gyration about V-Vaxis,
α = angle between U-U and X-X axes ofangle section; slope of flange in the caseof beam, column or channel.
Iya-----
Iua-----
Iva-----
Section Classification Abbreviated Reference Symbol
Beams ISJBISLBISMBISWB
JBLBMBWB
Columns/heavybeams
ISSCISHB
SCHB
Channels ISJCISLCISMC
ISMCP
JCLCMC
MCPAngles ISA ∠
IS 808 : 1989
3
SECTION 2 BEAM SECTIONSTable 2.1 Nominal Dimensions, Mass and Sectional Properties of Indian Standard Medium Flange Beams
Designation MassM
Sectional Area, a
Dimensions Sectional Properties
D B t T FlangeSlope, Max
R1 R2 Ix Iy rx ry Zx Zy
kg/m cm2 mm mm mm mm α, deg mm mm cm4 cm4 cm cm cm3 cm3
WB 200* (RSJ Section) is mainly used for railway electrification.
IS 808 : 1989
5
SECTION 3 COLUMN/HEAVY WEIGHT BEAM SECTIONSTable 3.1 Nominal Dimensions, Mass and Sectional Properties of Indian Standard Columns and Heavy Weight Beams
Designation MassM
Sectional Area, a
Dimensions Sectional Properties
D B t T FlangeSlope, α
R1 R2 Ix Iy rx ry Zx Zy
kg/m cm2 mm mm mm mm deg mm mm cm4 cm4 cm cm cm3 cm3
NOTE — HB sections are also used as column sections.
*These heavier sections in each size are obtained from the same set of rolls as the lighter sections by spreading of the rolls. The width of flanges of these sections gets increased byan amount equal to the difference between the thicknesses of the webs. Therefore, while ordering these heavier sections, mass should be mentioned.
IS 808 : 1989
6
SECTION 4 CHANNEL SECTIONSTable 4.1 Dimensions, Mass and Sectional Properties of Sloping Flange Channels
Designation MassM
Sectional Area, a
Dimensions Sectional Properties
D B t T FlangeSlope, α
R1 R2 Cy Ix Iy rx ry Zx Zy
kg/m cm2 mm mm mm mm deg mm mm mm cm4 cm4 cm cm cm3 cm3
*The heavier sections in each size intended for use in wagon industry are to be obtained from same set of rolls as the corresponding lightest section in that size group, by raisingthe rolls.
IS 808 : 1989
6A
Table 4.1 ( Concluded )
Designation MassM
Sectional Area, a
Dimensions Sectional Properties
D B t T FlangeSlope, α
R1 R2 Cy Ix Iy rx ry Zx Zy
kg/m cm2 mm mm mm mm deg mm mm mm cm4 cm4 cm cm cm3 cm3
*The heavier sections in each size intended for use in wagon industry are to be obtained from same set of rolls as the corresponding lightest section in that size group, by raisingthe rolls.
*The heavier sections in each size intended for use in wagon industry are to be obtained from the same set of rolls as the corresponding lightest section in that size group, byraising the rolls.
IS 808 : 1989
7A
Table 4.2 ( Concluded )
Designation MassM
Sectional Area, a
Dimensions Sectional Properties
D B t T R1 R2 Cy Ix Iy rx ry Zx Zy
kg/m cm2 mm mm mm mm mm mm mm cm4 cm4 cm cm cm3 cm3
*The heavier sections in each size intended for use in wagon industry are to be obtained from the same set of rolls as the corresponding lightest section in that size group, byraising the rolls.
IS 808 : 1989
8
SECTION 5 EQUAL LEG ANGLESTable 5.1 Nominal Dimensions, Mass and Sectional Properties of Indian Standard Equal Leg Angles
Designation Mass M
Sectional area, a
Dimensions Sectional Properties
A×B t R1 R2 Cx Cy Ix Iy Iu( Max ) Iv( Min ) rx ry ru( Max ) rv( Min ) Zx Zy
Kg/m Cm2 mm×mm mm mm mm cm cm cm4 cm4 cm4 cm4 cm cm cm cm cm3 cm3
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to connected matters in the country.
Copyright
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Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicates that nochanges are needed; if the review indicates that changes are needed, it is taken up for revision. Users ofIndian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of ‘BIS Catalogue’ and ‘Standards : Monthly Additions’.
This Indian Standard has been developed from Doc : No. SMDC 6 ( 3156 ) and amended by CED 8
Amendments Issued Since Publication
Amend No. Date of Issue
Amd. No. 1 July 1992
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