IS 12778:1989 :

Indian Standard c yq;::::- 7 $_ F, g 7 )

HOTROLLEDSTEEL "BE-Ai:I't;rri.li) 1998"

PARALLELFLANGEBEAM AND COLUMN SECTIONS-DIMENSIONS

( First Reprint DECEMBER 1992 )

UDC 669’14 - 423’2 : 006’78

BUREAU OF IN1)lAN STANDARDS MANAK BkiAVAN. 9 RAHADUR SHAM ZAFAR MARG

NEW DELHI 110002

Murci1 199u Price Group 2

Structural Sections Sectional Committee, CED 8

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards on 21 August 1989, after the draft finalized by the Structural Sections Sectional Committee had been approved by the Civil Engineering Division Council.

Parallel flange beams are hot rolled steel sections with parallel or nearly parallel flange with square toes and curves at the root of flange and web. Structurallv these beams are more efficient than the conventional beams with sloping flanges. Further these beams have proved very popular with the construction industry for reasons of considerably reducing the cost of fabrication.

Whereas these beams are being widely used in most of the developed countries, it is being contempu- lated to roll these in the country in the near future.

IS 12778 : 1989

Indian Standard

HOTROLLEDSTEEL PARALLEL FLANGEBEAMAND

COLUMNSECTIONS-DIMENSIONS

1 SCOPE

1.1 This standard covers the nominal dimensions, mass and sectional properties of hot rolled steel parallel flange beams with medium and wide flanges and column sections.

2 REFERENCE

IS No. Title

IS 12779 : 1989 Rolling and cutting tolerances for hot rolled parallel flange beam and column sections - Specification.

3 DEFINITIONS

3.1 Y-Y Axis

A line parallel to the a%is of the web of the _ _ _ . section and passing through the centre of gravrty of the section.

3.2 X-X Axis

A line passing through the centre to gravity of the section and at right angle to the Y-Y axis.

4 DESIGNATION

4.1 Medium and wide flange beams shall be designated by the letters IPM or IPW followed by the depth of the section in mm. Letters I,P,M or W stand for shape; parallel; medium and wide flanges respectively.

4.2 Column sections shall be designated by the letters HP followed by the depth of the section in mm. The letters H and P stand for shape and parallel flange respectively.

5 DIMENSIONS, MASS AND TOLERANCES

5.1 Nominal dimensions ( see Fig, 1 ) and mass shall conform to the values given in Tables. I and 2 respectively for medium and wide flange beam and to Table 3 for column sections. Dimetisional and mass tolerances shall conform to IS 12 779 : 1989.

NOTE -Density for the calculation of mam of the sccliOns har been taken as 7.85 km/cc.

6 SECTIONAL PROPERTIES

6.1 Sectional properties are given in Tables 1, 2 and 3 respectively for medium and wide flange beams and column sections, for information.

FIG. I PARALLEL FLANGE SECTION

IS 12778 : 1989

IPM 100 8’02 10’2 100 50 4’0 6’0

IPM 120 10’5 13’3 120 60 4’5 6’5

IPM 140 13’2 16’8 140 70 5’0 7’0

IPM 160 15’7 lg.9 160 80 5’0 7’5

IPM 180 18’7 23’8 180 90 5’0 8’0

IPM 200 22.2 28’3 200 100 5’5 8’5

IPM 220 25’2 32’2 220 110 5’5 9’0

IPM 240 30’7 39’1 240 120 6’0 10’0

IPM 270 35’5 45’2 270 135 6’5 10’0

IPM 300 42’7 54’4 300 150 7’0 11’0

IPM 350 57’2 73’0 350 170 8’0 13’0

IPM 400 66’0 84’0 400 180 8’5 13’5

IPM 450 79’0 101 450 190 9’5 15’0

IPM 500 90’0 115 500 200 10’0 16’0

IPM 550 104 133 550 210 11’0 17’0

IPM 600 122 156 600 220 12’0 19’0

I = ‘I’ shape, P = parallel, M = medium fiange

9

9

9

9

12

12

12

15

15

15

18

21

21

21

24

24

168 12’7

316 23’6

543 40’3

860 64’3

1 330 97’8

1 940 142

2 700 200

3 930 290

5 700 412

8 500 621

15500 1070

23 100 1 320

34400 1720

48 000 2 140

66 500 2 640

92 100 3390

4’05

4’87

5’69

6’57

7’46

5’06

7’87

11’5

16’1

21’7

8’28

9’17

10’0

11’2

12’5

28’5

36’4

48’2

61’0

82’8

14’6

16’6

18’5

20’5

22’4

1.13 33’5

1’33 52’6

1’55 77’6

1’80 107

2’03 147

2’24 194

2’49 246

2’72 327

3’02 422

3’38 561

3’83 887

3’96 1 150

4‘l4 1 530

4’32 1 920

4’45 2 420

126

146

181

214

251

24’3 4’66 3 070 308

Table 2 Parallel Flange Beams with Wide Flanges

( Clauses 5.1 and 6.1 >

Table 1 Parallel Flange Beams with Medium Flanges

( Clauses 5.1 and 6.1 )

D-b- Masn Area Depth Width Web Flange Root Momemt of Radius of Modulue of ll8tiOlb Thick- Thick- Radius Inertia Gyration Section

nesm nemm

r--&--j r._A-T r-h-7

CD) (B) (t) IT) CR) (Ix) (Iv) (b) (RY) Gw (ZY)

kg/m cm’ mm mm mm mm mm cm’ cm’ cm cm cm3 cm3

---

(1) (2b (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)

Dee&- nd0n

Maee Area Depth Width Web Flange Root Moment of Radius of Thick- Thick- Radius Inertia Gyration

n-e PtSS

r-A-y r-h-_$

@‘I 03) (4 (V (RI (Id (IY) (Rx) (RY)

kg/m cm” mm mm mm mm mm cm’ cm4 cm cm

Modulus of Section

r-A-7

Gw (Zy)

cm3 cm3

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)

IPW 150 21’2 27’0 150 100 6’0 9’0 11 1 050 151 6’24 2’36 140 30’1

IPW u)o 30’9 39’4 2Qo 150 6’0 9’0 13 2 880 507 8’55 3’58 288 67’5

IPW 250 44’5 56’6 250 175 7’0 11’0 16 6 460 984 10.7 4’ 16 517 112

IPW 300 57’2 72’8 300 200 8’0 12.0 18 11 900 1 GO0 12’8 4.69 791 160

IPW 350 88’4 102 350 250 9’0 14.0 20 23 100 3 650 15’0 5’97 1 320 292

IPW 400 108 137 400 300 10’0 160 22 40 900 7 210 17’3 7’25 2 040 480

IPW 450 124 158 450 300 11’0 18’0 24 58 900 8 130 19’3 7’16 2 620 542

I = ‘I’ shape., P = parallel, W = wide flange.

2

IS 12778 : 1989

Table 3 Parallel Flange Column Sections

( Clause 5.1 and 6.1 )

Degis- Mass Area Depth Width Web Flange Root Moment of Radius of Modulus of nation Thick- Thick- Radius Inertia Gyration Section

Peas ness r---y r_-A_y r -h-y

(D) (RI (t) (T) (R) Oa) (Iy) Rx Ry Zs Zy

kg/m cm* mm mm mm mm mm cm’ cm’ cm cm cm’ cm3

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)

HP 100 20’4 26’0 100 100 6’0 10’0 12 450 167 4’16 2’53 90 33’5

HP 120 26’7 34’0 120 120 6’5 11’0 12 864 318 5’04 3’06 144 52’9

HP 140 33’7 43’0 140 140 7’0 12’0 12 1 510 550 5’83 3’58 216 78’5

HP 160 42’6 54’3 160 160 8’0 13’0 15 2 490 889 6’78 4’05 311 111

HP 180 51’2 65’3 180 180 8’5 14’0 15 3 830 1 360 7’66 4’57 426 151

HP 200 61’3 78’1 200 200 9’0 15.0’ 18 5700 2000 8’54 5’07 570 220

HP 220 71’5 91’0 220 220 9’5 16’0 18 8090 2840 9’43 5’59 736 258

HP 240 83’2 106 240 240 10’0 17’0 21 11 300 3 920 10’3 6 08 938 327

HP 260 93’2 118 260 260 10’0 17’5 24 14 900 5 140 11’2 6’58 1 150 395

HP 280 103 131 280 280 10’5 18’0 24 19 300 6 600 12’1 7’05 1 380 471

HP 300 117 149 300 300 11’0 19’0 27 25 200 8 560 13’0 7’58 1 750 601

HP 350 155 197 350 350 12’0 22’0 27 45 700 15 700 15’2 8’94 2 611 899

HP 400 192 244 400 400 13’0 24’0 27 74 500 25 600 17’5 10’2 3 720 1281

H = ‘H’ shape, P = parallel

3

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