BS 2994 (Cold Rolled Steel Sections)

BRITISH STANDARD BS 2994:1976

Specification for

Cold rolled steel sections

UDC 669.14 – 423 – 122.2

BS 2994:1976

This British Standard, having been prepared under the direction of the Iron and Steel Standards Committee, was published under the authority of the Executive Board on 29 October 1976

© BSI 07-1999

First published July 1958First revision October 1976

The following BSI references relate to the work on this standard:Committee reference ISE/59Draft for comment 75/40054DC

ISBN 0 580 09377 8

Cooperating organizations

The Iron and Steel Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations:

British Cast Iron Research Association

British Constructional Steelwork Association*

British Ironfounders’ Association

British Mechanical Engineering Confederation

British Steel Industry*

British Steel Industry — Wire Section

The Concrete Society

Council of Iron Foundry Associations

Department of Industry (National Physical Laboratory)

Electricity Supply Industry in England and Wales

Engineering Equipment Users’ Association

Federation of Civil Engineering Contractors

Greater London Council*

Health and Safety Executive*

Institute of British Foundrymen

Institute of Marine Engineers

Institution of Mechanical Engineers (Automobile Division)

Institution of Production Engineers

Institution of Structural Engineers*

Lloyd’s Register of Shipping

Ministry of Defence

National Association of Drop Forgers and Stampers

Oil Companies Materials Association

Process Plant Association

Royal Institute of British Architects

Shipbuilders’ and Repairers’ National Association

Society of Motor Manufacturers and Traders Ltd.

Steel Castings Research and Trade Association

Tin Research Institute

The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this standard:

Cold Rolled Sections Association

Department of the Environment

Institution of Civil Engineers

Amendments issued since publication

Amd. No. Date of issue Comments

BS 2994:1976

© BSI 07-1999 i

Contents

PageCooperating organizations Inside front coverForeword ii1 Scope 12 Reference 13 Basis of calculation 14 Dimensions and tolerances 1Appendix A Basis of calculation for reduction factors 32Table 1 — Equal angles 2Table 2 — Unequal angles 4Table 3 — Plain channels 6Table 4 — Plain channels 8Table 5 — Inwardly lipped channels 11Table 6 — Inwardly lipped channels 13Table 7 — Outwardly lipped channels 16Table 8 — Outwardly lipped channels 17Table 9 — Tee sections 18Table 10 — Zed sections 22Table 11 — Lipped zed sections 24Table 12 — Plain channels back to back 26Table 13 — Inwardly lipped channels back to back 28Table 14 — Inwardly lipped channels lip to lip 30Publication referred to Inside back cover

BS 2994:1976

ii © BSI 07-1999

Foreword

This British Standard, which was first published in 1958, covers a basic range of sections formed by cold rolling from steel strip. The sizes in this revision include equivalents of previously used imperial sizes and also metric sizes adopted by the European Study Group for Cold Rolled Sections (comprised of members from Austria, Belgium, France, Germany, Italy, Netherlands and the United Kingdom).Although sections may not always be available ex-stock the sizes given in this standard are those most commonly in production. The purchaser would find it advantageous to use these sizes where possible, but size variations can readily be accommodated and in such cases requirements should be discussed with the manufacturer of the section.Attention is drawn to Addendum no. 1(1975) to BS 449-2 for design and construction details.A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 32, an inside back cover and a back cover.This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.

BS 2994:1976

© BSI 07-1999 1

1 ScopeThis British Standard specifies the dimensions, mass and geometrical properties of the basic ranges of eight simple and three compound types of cold rolled steel section.

2 ReferenceThe title of the standards publication referred to in this standard is given on the inside back cover.

3 Basis of calculationWhen steel strip is cold roll formed slight thinning occurs at the corners. The actual strip width necessary to form a section is therefore smaller than its theoretical width measured along the centre line of its cross section. For strip widths to be used in practice, experience has evolved reduction factors from which the thinning effect at the corners can be determined. In view of this the properties of the sections given in the tables have been computed using the reduction factors as briefly outlined in Appendix A.

4 Dimensions and tolerances4.1 Dimensions. The dimensions and profiles of the sections shall be in accordance with Table 1 toTable 14.The profile dimensions and angular accuracy shall be measured at a point not less than 150 mm from the end of the section.4.2 Tolerances for simple sections (Table 1 to Table 11). The straightness of any length shall be such that the offset does not exceed 1/600 of that length. The deviation of the profile dimensions shall not exceed ± 0.4 mm. The deviation from the angle of 90° shall not exceed ± 1°. The sections shall be reasonably free from twist and in particular cases the acceptable degree of twist shall be the subject of agreement between the purchaser and the manufacturer.The proportions of the sections may be such that the stated tolerance on the angle could lead to a variation on the overall profile dimensions exceeding the specified tolerance of ± 0.4 mm. In such cases the acceptable tolerance on the angle shall be the subject of agreement between the purchaser and the manufacturer.

The ± 0.4 mm profile tolerance shall not apply to elements having a free edge, e.g. lengths of the legs of angles, channels, tees and zed sections and the lips of lipped channels and lipped zed sections, etc. In these cases the tolerances shall be as follows.

The foregoing tolerances apply to all sections within the ranges included in Table 1 to Table 11 (i.e. sections of the same shape but of intermediate sizes and thicknesses); tolerances on cold rolled sections outside the basic ranges tabulated should be the subject of agreement between the purchaser and the manufacturer.The tolerances on ordered lengths shall be as follows.

For manufacturing reasons the corner radii may vary slightly from those shown in the tables. This, however, has a negligible effect on the properties of the section.4.3 Tolerances for compound sections(Table 12, Table 13 and Table 14). For compound sections, the tolerances shall be the subject of agreement between the purchaser and the manufacturer.

Thickness Permissible deviation

mm mm

less than 3.03.0 up to but not including 5.05.0 and over

± 0.75

± 1.25± 1.50

Ordered length Permissible deviation

m mm

up to and including 3over 3, up to and including 6over 6

± 0.8

± 1.5± 3.0

BS

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Table 1 — Equal angles

Designation Dimensions Mass/unit lengths

Area of section

Centre of gravity

Moment of inertia Radius of gyration Elastic modulus

Product moment of

inertia

A × A × t A t r Cx Cy About X–X, Y–Y

AboutU–U

About V–V

About X–X, Y–Y

About U–U

About V–V

About X–X, Y–Y

About XY

mm mm mm mm kg/m cm2 cm cm cm4 cm4 cm4 cm cm cm cm3 cm4

20 × 20 × 1.2 1.2 1.2 0.355 0.452 0.560 0.560 0.179 0.292 0.0667 0.630 0.804 0.384 0.125 0.133

20 × 20 × 1.6 20 1.6 1.6 0.463 0.590 0.580 0.580 0.231 0.378 0.0834 0.625 0.800 0.376 0.162 0.147

20 × 20 × 2 2 2 0.567 0.722 0.600 0.600 0.278 0.458 0.0977 0.620 0.797 0.368 0.198 0.180

25 × 25 × 1.6 1.6 1.6 0.589 0.750 0.705 0.705 0.464 0.756 0.171 0.787 1.00 0.478 0.258 0.293

25 × 25 × 2 25 2 2 0.724 0.922 0.725 0.725 0.563 0.923 0.204 0.782 1.00 0.470 0.317 0.359

25 × 25 × 3 3 3 1.04 1.32 0.776 0.776 0.784 1.30 0.258 0.769 0.991 0.450 0.455 0.516

30 × 30 × 1.6 1.6 1.6 0.714 0.910 0.830 0.830 0.817 1.33 0.306 0.948 1.21 0.580 0.377 0.511

30 × 30 × 2 30 2 2 0.881 1.12 0.850 0.850 0.997 1.63 0.367 0.943 1.20 0.572 0.464 0.630

30 × 30 × 3 3 3 1.27 1.62 0.900 0.900 1.41 2.32 0.495 0.931 1.19 0.552 0.670 0.912

40 × 40 × 1.6

40

1.6 1.6 0.965 1.23 1.08 1.08 1.99 3.21 0.757 1.27 1.62 0.784 0.680 1.23

40 × 40 × 2 2 2 1.19 1.52 1.10 1.10 2.44 3.96 0.917 1.27 1.61 0.776 0.840 1.52

40 × 40 × 2.5 2.5 2.5 1.47 1.88 1.12 1.12 2.98 4.85 1.10 1.26 1.61 0.766 1.04 1.88

40 × 40 × 3 3 3 1.75 2.22 1.15 1.15 3.49 5.71 1.27 1.25 1.60 0.756 1.23 2.22

50 × 50 × 2 2 2 1.51 1.92 1.35 1.35 4.85 7.85 1.85 1.59 2.02 0.980 1.33 3.00

50 × 50 × 2.5 50 2.5 2.5 1.87 2.38 1.37 1.37 5.95 9.66 2.24 1.58 2.02 0.970 1.64 3.71

50 × 50 × 3 3 3 2.22 2.82 1.40 1.40 7.01 11.4 2.60 1.58 2.01 0.960 1.95 4.41

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Table 1 — Equal angles

Designation Dimensions Mass/unit lengths

Area of section

Centre of gravity

Moment of inertia Radius of gyration Elastic modulus

Product moment of

inertia

A × A × t A t r Cx Cy About X–X, Y–Y

AboutU–U

About V–V

About X–X, Y–Y

About U–U

About V–V

About X–X, Y–Y

About XY

mm mm mm mm kg/m cm2 cm cm cm4 cm4 cm4 cm cm cm cm3 cm4

60 × 60 × 2

60

2 2 1.82 2.32 1.60 1.60 8.48 13.7 3.26 1.91 2.43 1.18 1.93 5.22

60 × 60 × 2.5 2.5 2.5 2.26 2.88 1.62 1.62 10.4 16.9 3.97 1.90 2.42 1.17 2.39 6.47

60 × 60 × 3 3 3 2.69 3.42 1.65 1.65 12.3 20.0 4.64 1.90 2.42 1.16 2.84 7.69

60 × 60 × 4 4 4 3.52 4.49 1.70 1.70 16.0 26.0 5.87 1.89 2.41 1.14 3.71 10.1

70 × 70 × 3

70

3 3 3.16 4.02 1.90 1.90 19.8 32.2 7.54 2.22 2.83 1.37 3.89 12.3

70 × 70 × 4 4 4 4.15 5.29 1.95 1.95 25.8 42.0 9.61 2.21 2.82 1.35 5.10 16.2

70 × 70 × 5 5 7.5 5.08 6.48 2.01 2.01 31.2 51.3 11.2 2.20 2.81 1.31 6.26 20.0

80 × 80 × 3

80

3 3 3.63 4.62 2.15 2.15 29.9 48.4 11.4 2.54 3.23 1.57 5.11 18.5

80 × 80 × 4 4 4 4.78 6.09 2.20 2.20 39.0 63.3 14.7 2.53 3.22 1.55 6.72 24.3

80 × 80 × 5 5 7.5 5.87 7.48 2.26 2.26 47.4 77.6 17.3 2.52 3.22 1.52 8.27 30.2

80 × 80 × 6 6 9 6.94 8.85 2.31 2.31 55.6 91.4 19.8 2.51 3.21 1.50 9.77 35.8

100 × 100 × 3

100

3 3 4.57 5.82 2.65 2.65 59.2 95.6 22.9 3.19 4.05 1.98 8.06 36.4

100 × 100 × 4 4 4 6.03 7.69 2.70 2.70 77.5 126 29.6 3.18 4.04 1.96 10.6 48.0

100 × 100 × 5 5 7.5 7.44 9.48 2.76 2.76 94.9 155 35.3 3.16 4.04 1.93 13.1 59.6

100 × 100 × 6 6 9 8.83 11.2 2.81 2.81 112 183 40.8 3.15 4.03 1.91 15.5 70.9

BS

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Table 2 — Unequal angles

Designation Dimensions Mass/unit length

Area of section

Centre of gravity

Moment of inertia Radius of gyration Angle

!

Elastic modulus Product moment

of inertia

A × B × t A B t r Cx Cy About X–X

AboutY–Y

About U–U

About V–V

About X–X

AboutY–Y

About U–U

About V–V

About X–X

AboutY–Y

AboutXY

mm mm mm mm mm kg/m cm2 cm cm cm4 cm4 cm4 cm4 cm cm cm cm tan ! cm3 cm3 cm4

20 × 15 × 1.2 1.2 1.2 0.308 0.392 0.636 0.378 0.162 0.0802 0.204 0.0386 0.643 0.452 0.721 0.314 0.580 0.119 0.0714 0.0716

20 × 15 × 1.6 20 15 1.6 1.6 0.400 0.510 0.658 0.396 0.207 0.102 0.262 0.0479 0.638 0.448 0.716 0.306 0.584 0.155 0.0927 0.0931

20 × 15 × 2 2 2 0.488 0.622 0.681 0.415 0.248 0.122 0.315 0.0556 0.632 0.443 0.712 0.299 0.588 0.188 0.113 0.113

30 × 15 × 1.2 1.2 1.2 0.402 0.512 1.07 0.303 0.491 0.0896 0.527 0.0533 0.980 0.418 1.02 0.323 0.288 0.255 0.0749 0.126

30 × 15 × 1.6 30 15 1.6 1.6 0.526 0.670 1.10 0.321 0.634 0.115 0.681 0.0673 0.973 0.414 1.01 0.317 0.290 0.333 0.0973 0.164

30 × 15 × 2 2 2 0.645 0.822 1.12 0.338 0.766 0.138 0.824 0.0796 0.966 0.410 1.00 0.311 0.292 0.408 0.119 0.200

30 × 20 × 1.6 30 20 1.6 1.6 0.589 0.750 0.990 0.473 0.708 0.262 0.834 0.137 0.972 0.592 1.05 0.427 0.469 0.352 0.172 0.268

30 × 20 × 2 2 2 0.724 0.922 1.01 0.492 0.860 0.318 1.01 0.162 0.966 0.587 1.05 0.420 0.472 0.433 0.211 0.329

40 × 20 × 1.6 1.6 1.6 0.714 0.910 1.43 0.404 1.55 0.283 1.67 0.169 1.31 0.558 1.35 0.430 0.288 0.604 0.177 0.398

40 × 20 × 2 40 20 2 2 0.881 1.12 1.46 0.422 1.89 0.343 2.03 0.202 1.30 0.553 1.35 0.424 0.289 0.744 0.218 0.489

40 × 20 × 2.5 2.5 2.5 1.08 1.38 1.49 0.444 2.29 0.414 2.47 0.240 1.29 0.548 1.34 0.417 0.291 0.913 0.266 0.598

40 × 25 × 2 40 25 2 2 0.959 1.22 1.34 0.571 2.06 0.652 2.36 0.352 1.30 0.731 1.39 0.537 0.419 0.777 0.338 0.717

40 × 25 × 2.5 2.5 2.5 1.18 1.50 1.37 0.594 2.51 0.790 2.88 0.420 1.29 0.725 1.38 0.528 0.421 0.955 0.415 0.880

50 × 25 × 1.6 1.6 1.6 0.903 1.15 1.76 0.487 3.09 0.567 3.32 0.340 1.64 0.702 1.70 0.544 0.287 0.955 0.282 0.789

50 × 25 × 2 50 25 2 2 1.12 1.42 1.79 0.505 3.79 0.691 4.07 0.412 1.63 0.697 1.69 0.538 0.288 1.18 0.347 0.972

50 × 25 × 2.5 2.5 2.5 1.38 1.75 1.82 0.527 4.62 0.839 4.97 0.493 1.62 0.692 1.68 0.531 0.289 1.45 0.425 1.19

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Table 2 — Unequal angles


Area of section

Centre of gravity

Moment of inertia Radius of gyration Angle

!

Elastic modulus

Product moment

of inertia

A × B × t A B t r Cx Cy About X–X

AboutY–Y

About U–U

About V–V

About X–X

AboutY–Y

About U–U

About V–V

About X–X

AboutY–Y

AboutXY

mm mm mm mm mm kg/m cm2 cm cm cm4 cm4 cm4 cm4 cm cm cm cm tan ! cm3 cm3 cm4

60 × 30 × 260 30

2 2 1.35 1.72 2.12 0.588 6.66 1.22 7.14 0.731 1.97 0.841 2.04 0.652 0.287 1.72 0.505 1.7060 × 30 × 3 3 3 1.98 2.52 2.18 0.633 9.59 1.74 10.3 1.02 1.95 0.830 2.02 0.637 0.289 2.51 0.735 2.48

80 × 30 × 2.5 2 2 1.67 2.12 3.04 0.496 14.5 1.30 15.0 0.850 2.62 0.782 2.66 0.633 0.181 2.93 0.518 2.4780 × 30 × 2.5 80 30 2.5 2.5 2.06 2.63 3.08 0.518 17.8 1.58 18.4 1.03 2.61 0.776 2.65 0.626 0.181 3.62 0.638 3.0580 × 30 × 3 3 3 2.45 3.12 3.11 0.540 21.0 1.86 21.7 1.20 2.59 0.771 2.63 0.620 0.182 4.30 0.755 3.60

80 × 50 × 3 3 3 2.92 3.72 2.63 1.10 25.4 8.08 29.1 4.43 2.61 1.47 2.79 1.09 0.417 4.74 2.07 8.7680 × 50 × 4 80 50 4 4 3.84 4.89 2.69 1.14 33.0 10.4 37.8 5.64 2.60 1.46 2.78 1.07 0.419 6.21 2.71 11.580 × 50 × 5 5 7.5 4.69 5.98 2.76 1.20 39.8 12.6 45.9 6.54 2.58 1.45 2.77 1.05 0.426 7.61 3.31 14.2

100 × 30 × 3 3 3 2.92 3.72 4.06 0.477 38.7 1.94 39.3 1.33 3.22 0.721 3.25 0.598 0.127 6.51 0.768 4.76100 × 30 × 4 100 30 4 4 3.84 4.89 4.13 0.521 50.0 2.47 50.8 1.69 3.20 0.711 3.22 0.588 0.127 8.52 0.997 6.15100 × 30 × 5 5 7.5 4.69 5.98 4.23 0.569 59.9 2.95 60.9 1.97 3.17 0.703 3.19 0.574 0.130 10.4 1.22 7.54

100 × 50 × 3

100 50

3 3 3.39 4.32 3.52 0.966 46.6 8.55 50.0 5.15 3.28 1.41 3.40 1.09 0.286 7.19 2.12 11.9100 × 50 × 4 4 4 4.46 5.69 3.58 1.01 60.6 11.1 65.1 6.58 3.27 1.39 3.38 1.08 0.288 9.44 2.77 15.6100 × 50 × 5 5 7.5 5.48 6.98 3.66 1.06 73.5 13.4 79.1 7.74 3.24 1.38 3.37 1.05 0.293 11.6 3.39 19.2100 × 50 × 6 6 9 6.47 8.25 3.73 1.11 85.8 15.6 92.5 8.86 3.23 1.37 3.35 1.04 0.295 13.7 4.00 22.7

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Table 3 — Plain channels


Area of section

Centre of gravity

Moment of inertia

Radius of gyration

Elastic modulus Shear centre

Torsion constant

Warping constant

D × B × t D B t r Cy About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw

mm mm mm mm mm kg/m cm2 cm cm4 cm4 cm cm cm3 cm3 cm cm4 cm6

20 × 20 × 1.2 1.2 1.2 0.521 0.664 0.741 0.454 0.277 0.827 0.646 0.454 0.220 1.55 0.0031 0.16420 × 20 × 1.6 20 20 1.6 1.6 0.675 0.860 0.766 0.563 0.351 0.809 0.639 0.563 0.284 1.55 0.0071 0.19320 × 20 × 2 2 2 0.819 1.04 0.792 0.653 0.416 0.791 0.631 0.653 0.344 1.55 0.0134 0.211

25 × 25 × 1.2

25 25

1.2 1.2 0.662 0.844 0.907 0.926 0.557 1.05 0.813 0.741 0.350 1.93 0.0040 0.53725 × 25 × 1.6 1.6 1.6 0.863 1.10 0.932 1.17 0.714 1.03 0.806 0.932 0.455 1.93 0.0092 0.65025 × 25 × 2 2 2 1.05 1.34 0.957 1.37 0.857 1.01 0.799 1.10 0.555 1.94 0.0174 0.73525 × 25 × 2.5 2.5 2.5 1.28 1.63 0.990 1.59 1.02 0.989 0.789 1.28 0.672 1.93 0.0326 0.805

30 × 30 × 1.6 1.6 1.6 1.05 1.34 1.10 2.09 1.27 1.25 0.973 1.40 0.666 2.32 0.0112 1.7230 × 30 × 2 30 30 2 2 1.29 1.64 1.12 2.49 1.53 1.23 0.966 1.66 0.816 2.32 0.0214 1.9930 × 30 × 3 3 3 1.84 2.35 1.19 3.31 2.11 1.19 0.947 2.20 1.16 2.32 0.0677 2.40

40 × 40 × 1.6

40 40

1.6 1.6 1.43 1.82 1.43 5.20 3.10 1.69 1.31 2.60 1.21 3.08 0.0153 7.8640 × 40 × 2 2 2 1.76 2.24 1.46 6.27 3.79 1.67 1.30 3.14 1.49 3.09 0.0294 9.2740 × 40 × 2.5 2.5 2.5 2.16 2.76 1.49 7.50 4.59 1.65 1.29 3.75 1.83 3.09 0.0561 10.740 × 40 × 3 3 3 2.55 3.25 1.52 8.60 5.33 1.63 1.28 4.30 2.15 3.10 0.0947 11.9

50 × 50 × 2

50 50

2 2 2.23 2.84 1.79 12.7 7.58 2.11 1.63 5.08 2.36 3.85 0.0374 30.050 × 50 × 2.5 2.5 2.5 2.75 3.51 1.82 15.3 9.24 2.09 1.62 6.13 2.91 3.86 0.0717 35.450 × 50 × 3 3 3 3.26 4.15 1.85 17.7 10.8 2.07 1.62 7.09 3.44 3.87 0.122 40.050 × 50 × 4 4 4 4.22 5.37 1.91 22.0 13.7 2.02 1.60 8.79 4.44 3.87 0.278 47.0

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Area of section

Centre of gravity

Moment of inertia

Radius of gyration


Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


60 × 60 × 2 2 2 2.70 3.44 2.12 22.5 13.3 2.55 1.97 7.49 3.43 4.62 0.0454 77.460 × 60 × 3 60 60 3 3 3.96 5.05 2.18 31.8 19.2 2.51 1.95 10.6 5.02 4.63 0.149 10660 × 60 × 4 4 4 5.16 6.57 2.25 39.9 24.5 2.46 1.93 13.3 6.53 4.64 0.342 127

80 × 80 × 2

80 80

2 2 3.65 4.64 2.79 54.8 32.7 3.44 2.63 13.7 6.18 6.14 0.0614 34280 × 80 × 3 3 3 5.38 6.85 2.85 78.7 46.9 3.39 2.62 19.7 9.10 6.16 0.203 47880 × 80 × 5 5 7.5 8.60 11.0 2.99 119 72.7 3.29 2.58 29.7 14.5 6.20 0.895 66680 × 80 × 6 6 9 10.1 12.9 3.06 136 84.3 3.25 2.56 34.0 17.1 6.20 1.51 732

100 × 100 × 2

100 100

2 2 4.59 5.84 3.45 109 63.6 4.32 3.30 21.8 9.72 7.67 0.0774 1 070100 × 100 × 3 3 3 6.79 8.65 3.52 158 93.2 4.27 3.28 31.6 14.4 7.69 0.257 1 520100 × 100 × 5 5 7.5 11.0 14.0 3.66 243 147 4.18 3.24 48.7 23.2 7.74 1.15 2 210100 × 100 × 6 6 9 12.9 16.5 3.73 281 172 4.13 3.23 56.2 27.4 7.75 1.94 2 480

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Area ofsection

Centre of gravity

Moment of inertia

Radius of gyration


Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


30 × 15 × 1.230 15

1.2 1.2 0.521 0.664 0.435 0.899 0.146 1.16 0.469 0.599 0.137 0.941 0.0031 0.19730 × 15 × 1.6 1.6 1.6 0.675 0.860 0.455 1.12 0.185 1.14 0.464 0.749 0.177 0.940 0.0071 0.234

30 × 20 × 1.230 20

1.2 1.2 0.615 0.784 0.636 1.15 0.324 1.21 0.643 0.765 0.238 1.38 0.0037 0.44430 × 20 × 2 2 2 0.976 1.24 0.681 1.71 0.497 1.17 0.632 1.14 0.377 1.39 0.0160 0.606

40 × 15 × 1.240 15

1.2 1.2 0.615 0.784 0.378 1.78 0.160 1.51 0.452 0.891 0.143 0.838 0.0037 0.40340 × 15 × 2 2 2 0.976 1.24 0.415 2.66 0.244 1.46 0.443 1.33 0.225 0.832 0.0160 0.552

40 × 20 × 240 20

2 2 1.13 1.44 0.600 3.38 0.556 1.53 0.620 1.69 0.397 1.25 0.0187 1.2740 × 20 × 3 3 3 1.61 2.05 0.651 4.48 0.758 1.48 0.608 2.24 0.562 1.25 0.0587 1.51

40 × 25 × 1.6 1.6 1.6 1.05 1.34 0.779 3.43 0.858 1.60 0.800 1.72 0.498 1.70 0.0112 2.0840 × 25 × 2 40 25 2 2 1.29 1.64 0.801 4.11 1.04 1.58 0.795 2.05 0.611 1.70 0.0214 2.4140 × 25 × 2.5 2.5 2.5 1.57 2.01 0.828 4.86 1.25 1.56 0.788 2.43 0.745 1.70 0.0405 2.73

50 × 25 × 1.6

50 25

1.6 1.6 1.18 1.50 0.705 5.76 0.928 1.96 0.787 2.30 0.517 1.57 0.0126 3.6050 × 25 × 2 2 2 1.45 1.84 0.725 6.93 1.13 1.94 0.782 2.77 0.634 1.57 0.0240 4.2250 × 25 × 2.5 2.5 2.5 1.77 2.26 0.750 8.26 1.36 1.91 0.776 3.30 0.775 1.57 0.0457 4.8550 × 25 × 3 3 3 2.08 2.65 0.776 9.44 1.57 1.89 0.769 3.78 0.909 1.56 0.0767 5.32

50 × 40 × 1.6

50 40

1.6 1.6 1.55 1.98 1.32 8.57 3.37 2.08 1.31 3.43 1.26 2.91 0.0167 13.450 × 40 × 2 2 2 1.92 2.44 1.34 10.4 4.12 2.06 1.30 4.16 1.55 2.92 0.0320 15.950 × 40 × 2.5 2.5 2.5 2.36 3.01 1.37 12.5 5.01 2.04 1.29 5.00 1.91 2.92 0.0613 18.650 × 40 × 3 3 3 2.78 3.55 1.40 14.4 5.85 2.02 1.28 5.77 2.25 2.92 0.104 20.9

60 × 30 × 1.6

60 30

1.6 1.6 1.43 1.82 0.830 10.2 1.63 2.37 0.948 3.40 0.753 1.88 0.0153 9.3460 × 30 × 2 2 2 1.76 2.24 0.850 12.4 1.99 2.35 0.943 4.12 0.927 1.88 0.0294 11.160 × 30 × 3 3 3 2.55 3.25 0.900 17.1 2.81 2.30 0.931 5.71 1.34 1.88 0.0947 14.560 × 30 × 4 4 4 3.28 4.17 0.951 21.0 3.52 2.25 0.919 7.01 1.72 1.87 0.214 16.6

BS

2994:1976

© B

SI 07-1999

9



Area ofsection

Centre of gravity

Moment of inertia Radius of gyration


Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


60 × 40 × 2 2 2 2.08 2.64 1.25 15.7 4.41 2.44 1.29 5.24 1.60 2.77 0.0347 24.860 × 40 × 3 60 40 3 3 3.02 3.85 1.31 22.0 6.29 2.39 1.28 7.34 2.33 2.77 0.113 33.060 × 40 × 4 4 4 3.90 4.97 1.36 27.3 7.95 2.34 1.26 9.11 3.01 2.77 2.257 38.8

60 × 50 × 260 50

2 2 2.39 3.04 1.68 19.1 8.11 2.51 1.63 6.37 2.44 3.68 0.0400 46.360 × 50 × 3 3 3 3.49 4.45 1.74 26.9 11.6 2.46 1.62 8.96 3.56 3.69 0.131 62.670 × 30 × 1.6 1.6 1.6 1.55 1.98 0.769 14.6 1.72 2.72 0.932 4.18 0.770 1.77 0.0167 13.670 × 30 × 2 70 30 2 2 1.92 2.44 0.788 17.8 2.10 2.70 0.927 5.08 0.949 1.77 0.0320 16.270 × 30 × 3 3 3 2.78 3.55 0.837 24.8 2.97 2.64 0.915 7.08 1.37 1.77 0.104 21.470 × 40 × 2 2 2 2.23 2.84 1.17 22.4 4.66 2.81 1.28 6.40 1.65 2.63 0.0374 36.070 × 40 × 3 70 40 3 3 3.26 4.15 1.22 31.5 6.66 2.76 1.27 9.01 2.40 2.63 0.122 48.570 × 40 × 4 4 4 4.22 5.37 1.27 39.4 8.45 2.71 1.25 11.3 3.10 2.63 0.278 57.7

80 × 25 × 1.6

80 25

1.6 1.6 1.55 1.98 0.553 17.6 1.07 2.98 0.735 4.39 0.550 1.29 0.0167 11.480 × 25 × 2 2 2 1.92 2.44 0.571 21.3 1.30 2.96 0.731 5.34 0.677 1.29 0.0320 13.580 × 25 × 3 3 3 2.78 3.55 0.617 29.8 1.84 2.90 0.720 7.44 0.976 1.28 0.104 17.880 × 25 × 4 4 4 3.59 4.57 0.662 36.8 2.30 2.84 0.709 9.20 1.25 1.26 0.235 20.7

80 × 40 × 1.6 1.6 1.6 1.93 2.46 1.08 25.0 3.97 3.18 1.27 6.24 1.36 2.51 0.0208 41.480 × 40 × 2 80 40 2 2 2.39 3.04 1.10 30.5 4.87 3.16 1.27 7.62 1.68 2.51 0.0400 49.880 × 40 × 3 3 3 3.49 4.45 1.15 43.1 6.98 3.11 1.25 10.8 2.45 2.51 0.131 67.780 × 40 × 4 4 4 4.53 5.77 1.20 54.1 8.89 3.06 1.24 13.5 3.18 2.51 0.299 81.3

80 × 50 × 2

80 50

2 2 2.70 3.44 1.49 36.6 8.99 3.26 1.62 9.14 2.57 3.38 0.0454 92.480 × 50 × 3 3 3 3.96 5.05 1.55 52.0 13.0 3.21 1.60 13.0 3.76 3.39 0.149 12780 × 50 × 4 4 4 5.16 6.57 1.60 65.7 16.6 3.16 1.59 16.4 4.89 3.39 0.342 15480 × 50 × 5 5 7.5 6.24 7.95 1.67 76.5 19.7 3.10 1.57 19.1 5.92 3.40 0.645 166

80 × 60 × 2 2 2 3.02 3.84 1.91 42.6 14.8 3.33 1.96 10.7 3.61 4.29 0.0507 15380 × 60 × 3 80 60 3 3 4.43 5.65 1.97 60.9 21.4 3.28 1.95 15.2 5.31 4.30 0.167 21280 × 60 × 4 4 4 5.79 7.37 2.02 77.3 27.5 3.24 1.93 19.3 6.92 4.30 0.385 260

90 × 40 × 1.6 1.6 1.6 2.06 2.62 1.02 32.8 4.12 3.54 1.25 7.28 1.38 2.40 0.0221 55.090 × 40 × 2 90 40 2 2 2.55 3.24 1.04 40.1 5.06 3.52 1.25 8.91 1.71 2.40 0.0427 66.390 × 40 × 3 3 3 3.73 4.75 1.09 56.9 7.27 3.46 1.24 12.7 2.49 2.40 0.140 90.7

90 × 50 × 1.6 1.6 1.6 2.31 2.94 1.40 39.0 7.60 3.64 1.61 8.67 2.11 3.25 0.0249 10190 × 50 × 2 90 50 2 2 2.86 3.64 1.42 47.8 9.36 3.62 1.60 10.6 2.61 3.25 0.0480 12390 × 50 × 3 3 3 4.20 5.35 1.47 68.3 13.5 3.57 1.59 15.2 3.83 3.26 0.158 169

100 × 40 × 1.6

100 40

1.6 1.6 2.18 2.78 0.964 41.9 4.25 3.88 1.24 8.38 1.40 2.30 0.0235 70.8100 × 40 × 2 2 2 2.70 3.44 0.983 51.3 5.23 3.86 1.23 10.3 1.73 2.30 0.0454 85.6100 × 40 × 3 3 3 3.96 5.05 1.03 73.1 7.52 3.81 1.22 14.6 2.53 2.30 0.149 118100 × 40 × 4 4 4 5.16 6.57 1.08 92.5 9.60 3.75 1.21 18.5 3.29 2.29 0.342 143

BS

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10©

BS

I 07-1999



Area ofsection

Centre of gravity



Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


100 × 50 × 2

100 50

2 2 3.02 3.84 1.35 60.9 9.69 3.98 1.59 12.2 2.66 3.14 0.0507 158100 × 50 × 3 3 3 4.43 5.65 1.40 87.2 14.0 3.93 1.58 17.4 3.89 3.14 0.167 219100 × 50 × 4 4 4 5.79 7.37 1.45 111 18.0 3.88 1.56 22.2 5.08 3.14 0.385 270100 × 50 × 5 5 7.5 7.03 8.95 1.51 130 21.5 3.82 1.55 26.1 6.17 3.15 0.729 297

100 × 60 × 2

100 60

2 2 3.33 4.24 1.74 70.5 16.0 4.08 1.94 14.1 3.75 4.00 0.0560 261100 × 60 × 3 3 3 4.90 6.25 1.79 101 23.2 4.03 1.93 20.3 5.51 4.01 0.185 365100 × 60 × 4 4 4 6.42 8.17 1.85 129 29.9 3.98 1.91 25.9 7.20 4.02 0.427 452100 × 60 × 5 5 7.5 7.81 9.95 1.91 153 35.9 3.92 1.90 30.6 8.79 4.03 0.812 505

120 × 50 × 3120 50

3 3 4.90 6.25 1.28 134 14.9 4.63 1.54 22.3 4.00 2.92 0.185 343120 × 50 × 4 4 4 6.42 8.17 1.33 171 19.2 4.57 1.53 28.5 5.22 2.92 0.427 425120 × 50 × 5 5 7.5 7.81 9.95 1.39 202 23.0 4.51 1.52 33.7 6.36 2.93 0.812 475

120 × 60 × 4120 60

4 4 7.04 8.97 1.70 198 31.9 4.70 1.89 33.0 7.42 3.77 0.470 709120 × 60 × 5 5 7.5 8.60 11.0 1.76 235 38.4 4.63 1.87 39.2 9.07 3.78 0.895 803120 × 60 × 6 6 9 10.1 12.9 1.82 270 44.6 4.58 1.86 45.1 10.7 3.78 1.51 887

140 × 60 × 4140 60

4 4 7.67 9.77 1.58 284 33.6 5.39 1.85 40.6 7.59 3.55 0.513 1 040140 × 60 × 6 6 9 11.1 14.1 1.69 391 47.2 5.27 1.83 55.9 10.9 3.56 1.66 1 320

150 × 50 × 3150 50

3 3 5.61 7.135 1.14 227 15.9 5.64 1.49 30.3 4.11 2.66 0.212 590150 × 50 × 4 4 4 7.36 9.37 1.18 292 20.5 5.58 1.48 38.9 5.37 2.65 0.491 739150 × 50 × 5 5 7.5 8.99 11.5 1.24 348 24.7 5.51 1.47 46.3 6.56 2.66 0.937 840

180 × 50 × 3180 50

3 3 6.32 8.05 1.03 353 16.7 6.62 1.44 39.2 4.19 2.44 0.239 918180 × 50 × 5 5 7.5 10.2 13.0 1.12 545 26.0 6.48 1.42 60.5 6.71 2.43 1.06 1 330

200 × 50 × 4 4 4 8.93 11.4 1.01 590 22.1 7.20 1.39 59.0 5.54 2.30 0.598 1 490200 × 50 × 5 200 50 5 7.5 11.0 14.0 1.06 708 26.7 7.12 1.38 70.8 6.79 2.30 1.15 1 730200 × 50 × 6 6 9 12.9 16.5 1.11 821 31.1 7.05 1.37 82.1 7.99 2.29 1.94 1 940

200 × 80 × 4 4 4 10.8 13.8 1.97 821 83.6 7.72 2.46 82.1 13.9 4.60 0.726 5 480200 × 80 × 5 200 80 5 7.5 13.3 17.0 2.02 993 102 7.65 2.45 99.3 17.1 4.62 1.40 6 460200 × 80 × 6 6 9 15.8 20.1 2.07 1 160 120 7.60 2.44 116 20.2 4.62 2.38 7 380

250 × 50 × 4 4 4 10.5 13.4 0.889 1 030 23.3 8.78 1.32 82.5 5.66 2.03 0.705 2 560250 × 50 × 5 250 50 5 7.5 12.9 16.5 0.937 1 240 28.2 8.69 1.31 99.4 6.94 2.03 1.35 2 990250 × 50 × 6 6 9 15.3 19.5 0.983 1 450 32.9 8.62 1.30 116 8.18 2.02 2.30 3 380

250 × 80 × 4 4 4 12.4 15.8 1.74 1 390 89.1 9.40 2.38 112 14.2 4.18 0.833 9 390250 × 80 × 5 250 80 5 7.5 15.3 19.5 1.80 1 690 109 9.33 2.37 135 17.6 4.19 1.60 11 160250 × 80 × 6 6 9 18.1 23.1 1.84 1 980 128 9.27 2.35 159 20.8 4.18 2.74 12 830

BS

2994:1976

© B

SI 07-1999

11

Table 5 — Inwardly lipped channels


Area of section

Centre of gravity

Moment of inertia

Radius of gyration


Torsion constant

Warping constant

D × B × C × t D B C t r CY About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw

mm mm mm mm mm mm kg/m cm2 cm cm4 cm4 cm cm cm3 cm3 cm cm4 cm6

25 × 25 × 8 × 1.225 25 8

1.2 1.2 0.769 0.979 1.12 0.994 0.831 1.01 0.921 0.795 0.602 2.45 0.0046 1.8325 × 25 × 8 × 1.6 1.6 1.6 0.986 1.26 1.12 1.22 1.01 0.987 0.899 0.979 0.732 2.39 0.0103 2.14

30 × 30 × 10 × 1.230 30 10

1.2 1.2 1.948 1.21 1.36 1.79 1.52 1.22 1.12 1.19 0.927 3.00 0.0057 5.1930 × 30 × 10 × 1.6 1.6 1.6 1.22 1.56 1.35 2.23 1.89 1.20 1.10 1.49 1.15 2.94 0.0129 6.22

35 × 35 × 10 × 1.235 35 10

1.2 1.2 1.09 1.39 1.53 2.90 2.35 1.45 1.30 1.66 1.19 3.39 0.0065 9.2535 × 10 × 10 × 1.6 1.6 1.6 1.41 1.80 1.53 3.66 2.94 1.43 1.28 2.09 1.49 3.34 0.0149 11.2

40 × 40 × 10 × 1.240 40 10

1.2 1.2 1.23 1.57 1.70 4.39 3.42 1.67 1.48 2.19 1.49 3.79 0.0074 15.640 × 40 × 10 × 1.6 1.6 1.6 1.60 2.04 1.70 5.57 4.32 1.65 1.45 2.79 1.88 3.73 0.0170 19.1

40 × 40 × 15 × 2 40 40 15 2 2 2.11 2.69 1.86 6.75 5.99 1.59 1.49 3.38 2.80 4.06 0.0347 41.5

50 × 50 × 10 × 1.6 50 50 10 1.6 1.6 1.98 2.52 2.04 11.2 8.18 2.10 1.80 4.47 2.76 4.50 0.0211 48.7

50 × 50 × 15 × 2 50 50 15 2 2 2.58 3.29 2.21 13.7 11.3 2.04 1.85 5.49 4.04 4.87 0.0427 94.1

60 × 60 × 15 × 260 60 15

2 2 3.05 3.89 2.55 24.3 18.9 2.50 2.21 8.09 5.48 5.65 0.0507 19260 × 60 × 15 × 2.5 2.5 2.5 3.74 4.76 2.55 29.2 22.5 2.47 2.18 9.72 6.53 5.58 0.0965 224

60 × 60 × 20 × 3 60 60 20 3 3 4.63 5.90 2.71 34.1 28.9 2.40 2.21 11.4 8.78 5.91 0.171 384

BS

2994:1976

12©

BS

I 07-1999



Area of section

Centre of gravity


Elastic modulus

Shear centre

Torsion constant

Warping constant

D × B × C × t D B C t r Cy About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


80 × 80 × 15 × 2 80 80 15 2 2 3.99 5.09 3.23 58.9 42.8 3.40 2.90 14.7 8.97 7.19 0.0667 641

80 × 80 × 20 × 3 80 80 20 3 3 6.04 7.70 3.40 84.6 65.7 3.32 2.92 21.2 14.3 7.49 0.225 1 170

80 × 80 × 25 × 480 80 25

4 4 8.12 10.3 3.56 107 88.9 3.22 2.93 26.8 20.0 7.76 0.535 1 94080 × 80 × 25 × 5 5 7.5 9.74 12.4 3.55 124 101 3.16 2.86 31.0 22.7 7.59 0.999 2 120

100 × 100 × 15 × 2 100 100 15 2 2 4.94 6.29 3.91 116 80.7 4.30 3.58 23.2 13.3 8.72 0.0827 1 720

100 × 100 × 20 × 3 100 100 20 3 3 7.45 9.50 4.08 169 124 4.22 3.62 33.8 21.0 9.03 0.279 2 980

100 × 100 × 25 × 4100 100 25

4 4 10.0 12.7 4.25 218 169 4.13 3.64 43.5 29.3 9.33 0.663 4 670100 × 100 × 25 × 5 5 7.5 12.1 15.4 4.23 256 195 4.07 3.56 51.1 33.8 9.16 1.25 5 210

BS

2994:1976

© B

SI 07-1999

13



Area of section

Centre of gravity

Moment of inertia

Radius of gyration


Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


30 × 15 × 10 × 1.230 15 10

1.2 1.2 0.665 0.847 0.652 1.04 0.291 1.11 0.586 0.694 0.343 1.49 0.0039 1.0430 × 15 × 10 × 1.6 1.6 1.6 0.847 1.08 0.651 1.27 0.347 1.08 0.567 0.843 0.409 1.44 0.0088 1.19

40 × 20 × 10 × 1.240 20 10

1.2 1.2 0.853 1.09 0.792 2.58 0.649 1.54 0.773 1.29 0.537 1.84 0.0051 3.0940 × 20 × 10 × 1.6 1.6 1.6 1.10 1.40 0.790 3.21 0.792 1.52 0.752 1.61 0.654 1.79 0.0115 3.65

50 × 25 × 10 × 1.2 50 25 10 1.2 1.2 1.04 1.33 0.927 5.13 1.20 1.97 0.952 2.05 0.765 2.17 0.0062 7.6150 × 25 × 10 × 1.6 1.6 1.6 1.35 1.72 0.923 6.48 1.49 1.94 0.931 2.59 0.945 2.11 0.0142 9.1750 × 25 × 15 × 2 50 25 15 2 2 1.80 2.29 1.05 7.97 2.13 1.87 0.964 3.19 1.46 2.39 0.0294 18.6

50 × 40 × 10 × 1.250 40 10

1.2 1.2 1.32 1.69 1.59 7.27 3.73 2.08 1.49 2.91 1.54 3.59 0.0080 23.050 × 40 × 10 × 1.6 1.6 1.6 1.73 2.20 1.58 9.29 4.70 2.05 1.46 3.72 1.94 3.54 0.0183 28.3

50 × 40 × 15 × 250 40 15

2 2 2.27 2.89 1.74 11.4 6.57 1.99 1.51 4.57 2.90 3.88 0.0374 55.850 × 40 × 15 × 3 3 3 3.21 4.10 1.73 15.4 8.66 1.94 1.45 6.15 3.82 3.74 0.117 69.4

60 × 30 × 10 × 1.6 60 30 10 1.6 1.6 1.60 2.04 1.05 11.4 2.49 2.36 1.10 3.79 1.28 2.44 0.0170 20.060 × 30 × 15 × 2 60 30 15 2 2 2.11 2.69 1.19 14.2 3.55 2.30 1.15 4.73 1.96 2.73 0.0347 37.660 × 30 × 20 × 3

60 30 203 3 3.21 4.10 1.30 19.4 5.35 2.18 1.14 6.48 3.15 2.91 0.117 74.4

60 × 30 × 20 × 4 4 4 4.04 5.15 1.30 23.0 6.18 2.11 1.10 7.66 3.63 2.79 0.257 80.9

60 × 40 × 15 × 2 60 40 15 2 2 2.42 3.09 1.63 17.6 7.07 2.38 1.51 5.85 2.98 3.70 0.0401 73.960 × 40 × 20 × 3

60 40 203 3 3.69 4.70 1.76 24.3 10.8 2.28 1.51 8.10 4.81 3.92 0.135 148

60 × 40 × 20 × 4 4 4 4.67 5.95 1.76 29.2 12.7 2.22 1.46 9.75 5.68 3.79 0.300 166

70 × 25 × 10 × 1.6 70 25 10 1.6 1.6 1.60 2.04 0.791 14.5 1.68 2.66 0.908 4.14 0.984 1.86 0.0170 17.670 × 25 × 15 × 2 70 25 15 2 2 2.11 2.69 0.908 18.3 2.43 2.61 0.952 5.22 1.53 2.12 0.0347 31.770 × 25 × 20 × 3 70 25 20 3 3 3.21 4.10 1.01 25.3 3.67 2.49 0.947 7.23 2.46 2.28 0.117 59.1

BS

2994:1976

14©

BS

I 07-1999



Area of section

Centre of gravity

Moment of inertia

Radius of gyration

Elastic modulus

Shear centre

Torsion constant

Warping constant


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


70 × 30 × 15 × 2 70 30 15 2 2 2.27 2.89 1.11 20.6 3.77 2.67 1.14 5.88 1.99 2.59 0.0374 48.870 × 30 × 20 × 3 70 30 20 3 3 3.45 4.40 1.22 28.7 5.73 2.55 1.14 8.20 3.22 2.77 0.126 92.2

70 × 40 × 15 × 2 70 40 15 2 2 2.58 3.29 1.54 25.2 7.51 2.77 1.51 7.21 3.05 3.54 0.0427 95.970 × 40 × 20 × 3 70 40 20 3 3 3.92 5.00 1.67 35.4 11.5 2.66 1.52 10.1 4.93 3.76 0.144 18370 × 40 × 25 × 4 70 40 25 4 4 5.30 6.75 1.79 43.6 15.4 2.54 1.51 12.5 6.95 3.94 0.343 312

80 × 40 × 10 × 1.6 80 40 10 1.6 1.6 2.10 2.68 1.31 27.3 5.59 3.19 1.44 6.84 2.08 3.07 0.0224 72.080 × 40 × 15 × 2 80 40 15 2 2 2.74 3.49 1.46 34.5 7.90 3.15 1.51 8.63 3.10 3.39 0.0454 12280 × 40 × 20 × 3 80 40 20 3 3 4.16 5.30 1.58 49.0 12.2 3.04 1.51 12.3 5.02 3.60 0.153 22680 × 40 × 25 × 4 80 40 25 4 4 5.61 7.15 1.70 61.1 16.3 2.92 1.51 15.3 7.10 3.79 0.364 371

80 × 50 × 10 × 1.6 80 50 10 1.6 1.6 2.35 3.00 1.73 32.3 9.72 3.28 1.80 8.07 2.97 3.98 0.0252 12480 × 50 × 15 × 2 80 50 15 2 2 3.05 3.89 1.88 40.6 13.5 3.23 1.87 10.2 4.34 4.32 0.0507 20780 × 50 × 20 × 3 80 50 20 3 3 4.63 5.90 2.02 57.9 20.8 3.13 1.88 14.5 7.00 4.57 0.171 38480 × 50 × 25 × 4 80 50 25 4 4 6.24 7.95 2.15 72.7 28.2 3.02 1.88 18.2 9.89 4.78 0.407 635

90 × 40 × 10 × 1.6 90 40 10 1.6 1.6 2.23 2.84 1.24 35.9 5.82 3.56 1.43 7.99 2.11 2.94 0.0238 92.690 × 40 × 15 × 2 90 40 15 2 2 2.89 3.69 1.38 45.6 8.25 3.52 1.50 10.1 3.15 3.25 0.0481 15390 × 40 × 20 × 3 90 40 20 3 3 4.39 5.60 1.50 65.3 12.7 3.42 1.51 14.5 5.10 3.46 0.162 275

90 × 50 × 10 × 1.6 90 50 10 1.6 1.6 2.48 3.16 1.64 42.2 10.1 3.65 1.79 9.38 3.02 3.83 0.0265 16090 × 50 × 15 × 2 90 50 15 2 2 3.21 4.09 1.80 53.3 14.1 3.61 1.86 11.9 4.41 4.17 0.0534 25990 × 50 × 20 × 3 90 50 20 3 3 4.86 6.20 1.93 76.7 21.9 3.52 1.88 17.0 7.12 4.41 0.180 468

100 × 40 × 10 × 1.6 100 40 10 1.6 1.6 2.35 3.00 1.18 46.0 6.03 3.91 1.42 9.19 2.14 2.83 0.0252 116100 × 40 × 15 × 2 100 40 15 2 2 3.05 3.89 1.32 58.5 8.56 3.88 1.48 11.7 3.19 3.12 0.0507 188100 × 40 × 20 × 3 100 40 20 3 3 4.63 5.90 1.44 84.4 13.3 3.78 1.50 16.9 5.17 3.32 0.171 332

100 × 50 × 15 × 2 100 50 15 2 2 3.37 4.29 1.72 68.1 14.7 3.99 1.85 13.6 4.47 4.03 0.0561 319100 × 50 × 20 × 3 100 50 20 3 3 5.10 6.50 1.85 98.5 22.8 3.89 1.87 19.7 7.22 4.26 0.189 564100 × 50 × 25 × 4

100 50 254 4 6.87 8.75 1.97 126 30.9 3.79 1.88 25.1 10.2 4.47 0.449 891

100 × 50 × 25 × 5 5 7.5 8.17 10.4 1.96 143 34.3 3.70 1.82 28.5 11.3 4.31 0.833 936

100 × 60 × 15 × 2 100 60 15 2 2 3.68 4.69 2.13 77.7 22.9 4.07 2.21 15.5 5.92 4.94 0.0614 493100 × 60 × 20 × 3 100 60 20 3 3 5.57 7.10 2.28 113 35.4 3.98 2.23 22.5 9.52 5.20 0.207 871100 × 60 × 25 × 4

100 60 254 4 7.49 9.55 2.41 144 48.2 3.88 2.25 28.8 13.4 5.43 0.492 1 380

100 × 60 × 25 × 5 5 7.5 8.95 11.4 2.40 165 54.2 3.81 2.18 33.0 15.0 5.27 0.916 1 480

120 × 50 × 15 × 2 120 50 15 2 2 3.68 4.69 1.58 104 15.7 4.71 1.83 17.4 4.57 3.77 0.0614 464120 × 50 × 20 × 3 120 50 20 3 3 5.57 7.10 1.71 152 24.4 4.63 1.85 25.3 7.39 3.99 0.207 797120 × 50 × 25 × 4

120 50 254 4 7.49 9.55 1.83 196 33.3 4.53 1.87 32.6 10.5 4.19 0.492 1 220

120 × 50 × 25 × 5 5 7.5 8.95 11.4 1.81 224 37.0 4.44 1.80 37.4 11.6 4.03 0.916 1 290

BS

2994:1976

© B

SI 07-1999

15



Area of section

Centre of gravity

Moment of inertia

Radius of gyration

Elastic modulus

Shear centre

Torsion constant

Warping constant

D × B × C × t B A C t r Cy About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sy K Iw


120 × 60 × 20 × 3 120 60 20 3 3 6.04 7.70 2.11 173 37.9 4.74 2.22 28.8 9.76 4.90 0.225 1 230120 × 60 × 25 × 4

120 60 254 4 8.12 10.3 2.24 223 51.8 4.64 2.24 37.1 13.8 5.12 0.535 1 880

120 × 60 × 25 × 5 5 7.5 9.74 12.4 2.22 258 58.4 4.56 2.17 42.9 15.5 4.96 0.999 2 030

140 × 60 × 20 × 3 140 60 20 3 3 6.51 8.30 1.97 248 40.1 5.47 2.20 35.4 9.94 4.63 0.243 1 670140 × 60 × 25 × 4

140 60 254 4 8.75 11.1 2.10 322 55.0 5.38 2.22 46.0 14.1 4.85 0.577 2 510

140 × 60 × 25 × 5 5 7.5 10.5 13.4 2.08 375 62.1 5.29 2.15 53.5 15.8 4.69 1.08 2 720

150 × 50 × 20 × 3 150 50 20 3 3 6.28 8.00 1.53 259 26.3 5.69 1.81 34.6 7.58 3.64 0.234 1 250150 × 50 × 25 × 4

150 50 254 4 8.44 10.7 1.64 338 36.1 5.61 1.83 45.0 10.8 3.83 0.556 1 860

150 × 50 × 25 × 5 5 7.5 10.1 12.9 1.63 391 40.2 5.50 1.77 52.1 11.9 3.67 1.04 1 980

180 × 50 × 20 × 3 180 50 20 3 3 6.98 8.90 1.39 403 27.8 6.73 1.77 44.7 7.71 3.36 0.261 1 840180 × 50 × 25 × 4

180 50 254 4 9.38 11.9 1.50 528 38.4 6.65 1.79 58.6 11.0 3.53 0.620 2 680

180 × 50 × 25 × 5 5 7.5 11.3 14.4 1.48 615 42.8 6.53 1.72 68.3 12.2 3.38 1.17 2 880

180 × 80 × 20 × 3 180 80 20 3 3 8.40 10.7 2.49 544 88.5 7.13 2.88 60.4 16.1 5.91 0.315 5 650180 × 80 × 25 × 4

180 80 254 4 11.3 14.3 2.62 714 122 7.05 2.91 79.3 22.6 6.14 0.748 8 240

180 × 80 × 25 × 5 5 7.5 13.7 17.4 2.60 845 140 6.97 2.84 93.8 25.9 5.98 1.42 9 230

200 × 50 × 20 × 3 200 50 20 3 3 7.45 9.50 1.31 520 28.7 7.40 1.74 52.0 7.78 3.20 0.279 2 310200 × 50 × 25 × 4

200 50 254 4 10.0 12.7 1.42 684 39.6 7.33 1.76 68.4 11.1 3.36 0.663 3 340

200 × 50 × 25 × 5 5 7.5 12.1 15.4 1.40 800 44.3 7.21 1.70 80.0 12.3 3.21 1.25 3 610

200 × 80 × 20 × 3 200 80 20 3 3 8.87 11.3 2.36 695 91.6 7.84 2.85 69.5 16.3 5.68 0.333 7 100200 × 80 × 25 × 4

200 80 254 4 11.9 15.1 2.49 915 126 7.77 2.88 91.5 22.9 5.90 0.791 10 270

200 × 80 × 25 × 5 5 7.5 14.4 18.4 2.47 1 090 145 7.68 2.81 109 26.3 5.74 1.50 11 530

250 × 50 × 20 × 3 250 50 20 3 3 8.63 11.0 1.15 899 30.5 9.04 1.66 72.0 7.92 2.86 0.324 3 770250 × 50 × 25 × 4

250 50 254 4 11.6 14.7 1.25 1 190 42.2 8.98 1.69 95.2 11.3 3.00 0.769 5 380

250 × 50 × 25 × 5 5 7.5 14.1 17.9 1.24 1 400 47.2 8.85 1.62 112 12.6 2.86 1.46 5 860

250 × 80 × 20 × 3 250 80 20 3 3 10.0 12.8 2.10 1 170 98.1 9.58 2.77 93.9 16.6 5.19 0.378 11 630250 × 80 × 25 × 4

250 80 254 4 13.5 17.1 2.23 1 550 135 9.52 2.81 124 23.4 5.39 0.897 16 580

250 × 80 × 25 × 5 5 7.5 16.4 20.9 2.21 1 850 156 9.41 2.73 148 27.0 5.22 1.71 18 740

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Table 7 — Outwardly lipped channels


Area of section

Centre of gravity

Moment of inertia

Radius of gyration

Elastic modulus

Shear centre

Torsion constant

Warping constant

B × A × C × t B A C t r Cx About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sx K Iw


30 × 30 × 10 × 1.230 30 10

1.2 1.2 0.948 1.21 1.36 1.52 2.40 1.12 1.41 0.927 1.01 2.57 0.0057 1.4930 × 30 × 10 × 1.6 1.6 1.6 1.22 1.56 1.35 1.89 3.00 1.10 1.39 1.15 1.28 2.52 0.0129 1.74

35 × 35 × 10 × 1.235 35 10

1.2 1.2 1.09 1.39 1.53 2.35 3.62 1.30 1.61 1.19 1.37 3.02 0.0065 3.2635 × 35 × 10 × 1.6 1.6 1.6 1.41 1.80 1.53 2.94 4.56 1.28 1.59 1.49 1.76 2.97 0.0149 3.89

40 × 40 × 10 × 1.240 40 10

1.2 1.2 1.23 1.57 1.70 3.42 5.21 1.48 1.82 1.49 1.81 3.45 0.0074 6.5340 × 40 × 10 × 1.6 1.6 1.6 1.60 2.04 1.70 4.32 6.61 1.45 1.80 1.88 2.33 3.40 0.0170 7.9140 × 40 × 15 × 2 40 40 15 2 2 2.11 2.69 1.86 5.99 9.73 1.49 1.90 2.80 2.95 3.36 0.0347 10.140 × 40 × 20 × 3 40 40 20 3 3 3.21 4.10 2.00 8.97 16.6 1.48 2.01 4.48 4.48 3.11 0.117 16.4

50 × 50 × 10 × 1.6 50 50 10 1.6 1.6 1.98 2.52 2.04 8.18 12.5 1.80 2.23 2.76 3.73 4.24 0.0211 25.950 × 50 × 15 × 2 50 50 15 2 2 2.58 3.29 2.21 11.3 17.5 1.85 2.31 4.04 4.60 4.28 0.0427 30.950 × 50 × 20 × 3 50 50 20 3 3 3.92 5.00 2.36 17.1 28.5 1.85 2.39 6.48 6.79 4.12 0.144 44.0

60 × 60 × 10 × 1.6 60 60 10 1.6 1.6 2.35 3.00 2.38 13.8 21.1 2.14 2.65 3.81 5.51 5.05 0.0252 67.860 × 60 × 15 × 2 60 60 15 2 2 3.05 3.89 2.55 18.9 28.8 2.21 2.72 5.48 6.70 5.15 0.0507 80.060 × 60 × 20 × 3 60 60 20 3 3 4.63 5.90 2.71 28.9 45.8 2.21 2.79 8.78 9.74 5.06 0.171 10860 × 60 × 25 × 4 60 60 25 4 4 6.24 7.95 2.86 38.8 65.7 2.21 2.88 12.3 12.9 4.87 0.407 142

80 × 80 × 15 × 2 80 80 15 2 2 3.99 5.09 3.23 42.8 65.0 2.90 3.57 8.97 12.3 6.81 0.0667 36380 × 80 × 20 × 3 80 80 20 3 3 6.04 7.70 3.40 65.7 100 2.92 3.61 14.3 17.6 6.83 0.225 48680 × 80 × 25 × 4 80 80 25 4 4 8.12 10.3 3.56 88.9 140 2.93 3.67 20.0 22.9 6.75 0.535 59380 × 80 × 30 × 5 80 80 30 5 7.5 10.1 12.9 3.71 110 182 2.92 3.75 25.6 28.0 6.56 1.04 665

100 × 100 × 15 × 2 100 100 15 2 2 4.94 6.29 3.91 80.7 124 3.58 4.44 13.3 19.6 8.42 0.0827 1 160100 × 100 × 20 × 3 100 100 20 3 3 7.45 9.50 4.08 124 189 3.62 4.46 21.0 28.2 8.50 0.279 1 580100 × 100 × 25 × 4 100 100 25 4 4 10.0 12.7 4.25 169 258 3.64 4.50 29.3 36.4 8.50 0.663 1 930100 × 100 × 30 × 5

100 100 305 7.5 12.5 15.9 4.40 210 330 3.63 4.56 37.5 44.1 8.41 1.29 2 130

100 × 100 × 30 × 6 6 9 14.6 18.6 4.39 237 377 3.57 4.50 42.2 50.9 8.27 2.16 2 270

BS

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© B

SI 07-1999

17

Table 8 — Outwardly lipped channels


Area of section

Centre of gravity

Moment of inertia

Radius of gyration

Elastic modulus

Shear centre

Torsion constant

Warping constant

B × A × C × t B A C t r Cx About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Sx K Iw


40 × 50 × 10 × 1.6 40 50 10 1.6 1.6 1.85 2.36 2.17 7.52 7.79 1.79 1.82 2.66 2.74 4.37 0.0197 14.940 × 50 × 15 × 2 40 50 15 2 2 2.42 3.09 2.34 10.3 11.2 1.83 1.90 3.89 3.39 4.31 0.0401 19.140 × 50 × 20 × 3 40 50 20 3 3 3.69 4.70 2.50 15.6 18.6 1.82 1.99 6.23 5.03 4.04 0.135 31.2

40 × 60 × 15 × 2 40 60 15 2 2 2.74 3.49 2.83 16.2 12.6 2.16 1.90 5.12 3.82 5.28 0.0454 32.140 × 60 × 20 × 3 40 60 20 3 3 4.16 5.30 3.00 24.5 20.7 2.15 1.98 8.17 5.59 4.97 0.153 52.5

40 × 80 × 15 × 2 40 80 15 2 2 3.37 4.29 3.82 33.4 15.5 2.79 1.90 7.99 4.70 7.23 0.0561 73.240 × 80 × 20 × 3 40 80 20 3 3 5.10 6.50 4.00 50.6 24.8 2.79 1.95 12.7 6.70 6.88 0.189 119

50 × 30 × 10 × 1.250 30

10 1.2 1.2 1.14 1.45 1.14 1.86 6.88 1.13 2.18 1.00 2.03 2.41 0.0068 5.2950 × 30 × 10 × 1.6 1.6 1.6 1.48 1.88 1.14 2.32 8.72 1.11 2.15 1.25 2.61 2.36 0.0156 6.37

50 × 40 × 10 × 1.250 40

10 1.2 1.2 1.32 1.69 1.59 3.73 8.31 1.49 2.22 1.54 2.46 3.34 0.0080 11.450 × 40 × 10 × 1.6 1.6 1.6 1.73 2.20 1.58 4.70 10.6 1.46 2.20 1.94 3.17 3.29 0.0183 14.0

50 × 60 × 15 × 2 50 60 15 2 2 2.89 3.69 2.69 17.6 19.8 2.19 2.32 5.32 5.21 5.24 0.0481 51.750 × 60 × 20 × 3 50 60 20 3 3 4.39 5.60 2.85 26.8 31.8 2.19 2.38 8.51 7.58 5.07 0.162 74.550 × 60 × 25 × 4 50 60 25 4 4 5.92 7.55 3.00 35.8 46.5 2.18 2.48 11.9 10.1 4.78 0.385 108

50 × 80 × 15 × 2 50 80 15 2 2 3.52 4.49 3.65 36.1 24.4 2.84 2.33 8.30 6.42 7.18 0.0587 11750 × 80 × 20 × 3 50 80 20 3 3 5.33 6.80 3.83 54.9 38.5 2.84 2.38 13.2 9.16 6.99 0.198 17150 × 80 × 25 × 4 50 80 25 4 4 7.18 9.15 4.00 73.6 54.9 2.84 2.45 18.4 11.9 6.66 0.471 248

60 × 80 × 15 × 2 60 80 15 2 2 3.68 4.69 3.50 38.5 35.6 2.87 2.75 8.55 8.27 7.08 0.0614 17960 × 80 × 20 × 3 60 80 20 3 3 5.57 7.10 3.67 58.8 55.5 2.88 2.80 13.6 11.8 6.99 0.207 24760 × 80 × 25 × 4 60 80 25 4 4 7.49 9.55 3.84 79.1 78.3 2.88 2.86 19.0 15.4 6.77 0.492 328

80 × 100 × 15 × 2 80 100 15 2 2 4.62 5.89 4.17 74.5 77.2 3.56 3.62 12.8 14.6 8.73 0.0774 67080 × 100 × 20 × 3 80 100 20 3 3 6.98 8.90 4.35 114 118 3.58 3.65 20.2 20.7 8.75 0.261 91380 × 100 × 25 × 4 80 100 25 4 4 9.38 11.9 4.52 155 163 3.60 3.69 28.2 26.7 8.68 0.620 1 13080 × 100 × 30 × 5 80 100 30 5 7.5 11.7 14.9 4.68 191 210 3.58 3.75 36.0 32.3 8.47 1.21 1 290

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Table 9 — Tee sections


Area of section

Centre of gravity

Moment of inertia Radius of gyration Elastic modulus Torsion constant

B × D × t B D t r About About About About About About KCx X–X Y–Y X–X Y–Y X–X Y–Y

mm mm mm mm mm kg/m cm2 cm cm4 cm4 cm cm cm3 cm3 cm4

25 × 15 × 125 15

1 1 0.396 0.504 0.449 0.110 0.131 0.467 0.510 0.105 0.105 0.001625 × 15 × 1.2 1.2 1.2 0.467 0.594 0.456 0.127 0.158 0.462 0.515 0.122 0.126 0.002825 × 15 × 1.6 1.6 1.6 0.599 0.763 0.472 0.156 0.211 0.453 0.526 0.152 0.169 0.0062

25 × 20 × 1

25 20

1 1 0.474 0.604 0.659 0.247 0.131 0.639 0.466 0.184 0.105 0.002025 × 20 × 1.2 1.2 1.2 0.561 0.714 0.667 0.287 0.158 0.634 0.471 0.215 0.127 0.003325 × 20 × 1.6 1.6 1.6 0.725 0.923 0.685 0.358 0.213 0.623 0.480 0.273 0.170 0.007625 × 20 × 2 2 2 0.877 1.12 0.703 0.419 0.268 0.612 0.490 0.323 0.215 0.0142

25 × 25 × 1

25 25

1 1 0.553 0.704 0.880 0.457 0.132 0.806 0.432 0.282 0.105 0.002325 × 25 × 1.2 1.2 1.2 0.655 0.834 0.889 0.534 0.159 0.800 0.436 0.332 0.127 0.003925 × 25 × 1.6 1.6 1.6 0.850 1.08 0.909 0.674 0.214 0.789 0.445 0.424 0.171 0.009025 × 25 × 2 2 2 1.03 1.32 0.928 0.796 0.271 0.777 0.454 0.507 0.217 0.0169

25 × 35 × 1

25 35

1 1 0.710 0.904 1.34 1.15 0.132 1.13 0.383 0.534 0.106 0.003025 × 35 × 1.2 1.2 1.2 0.843 1.07 1.35 1.35 0.160 1.12 0.386 0.631 0.128 0.005125 × 35 × 1.6 1.6 1.6 1.10 1.40 1.37 1.73 0.217 1.11 0.393 0.813 0.173 0.011725 × 35 × 2 2 2 1.35 1.72 1.40 2.07 0.276 1.10 0.401 0.982 0.221 0.0222

35 × 20 × 1

35 20

1 1 0.553 0.704 0.572 0.278 0.358 0.629 0.713 0.195 0.205 0.002335 × 20 × 1.2 1.2 1.2 0.655 0.834 0.580 0.325 0.431 0.624 0.718 0.229 0.246 0.003935 × 20 × 1.6 1.6 1.6 0.850 1.08 0.596 0.409 0.576 0.614 0.729 0.291 0.329 0.009035 × 20 × 2 2 2 1.03 1.32 0.611 0.482 0.723 0.605 0.740 0.347 0.413 0.0169

35 × 25 × 1

35 25

1 1 0.631 0.804 0.777 0.518 0.359 0.802 0.668 0.300 0.205 0.002635 × 25 × 1.2 1.2 1.2 0.749 0.954 0.785 0.607 0.431 0.797 0.672 0.354 0.246 0.004535 × 25 × 1.6 1.6 1.6 0.976 1.24 0.802 0.770 0.577 0.787 0.681 0.454 0.330 0.010335 × 25 × 2 2 2 1.19 1.52 0.819 0.916 0.725 0.777 0.691 0.545 0.414 0.0195

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Area of section

Centre of gravity




35 × 35 × 1

35 35

1 1 0.788 1.00 1.21 1.30 0.359 1.14 0.598 0.570 0.205 0.003335 × 35 × 1.2 1.2 1.2 0.938 1.19 1.22 1.53 0.432 1.13 0.602 0.674 0.247 0.005635 × 35 × 1.6 1.6 1.6 1.23 1.56 1.24 1.97 0.580 1.12 0.609 0.872 0.332 0.013035 × 35 × 2 2 2 1.51 1.92 1.26 2.37 0.731 1.11 0.617 1.06 0.417 0.0249

35 × 40 × 1

35 40

1 1 0.867 1.10 1.44 1.88 0.360 1.30 0.571 0.733 0.206 0.003635 × 40 × 1.2 1.2 1.2 1.03 1.31 1.45 2.21 0.433 1.30 0.574 0.868 0.247 0.006235 × 40 × 1.6 1.6 1.6 1.35 1.72 1.47 2.85 0.582 1.29 0.581 1.13 0.332 0.014435 × 40 × 2 2 2 1.66 2.12 1.49 3.44 0.733 1.27 0.588 1.37 0.419 0.0275

40 × 20 × 1

40 20

1 1 0.592 0.754 0.538 0.291 0.535 0.621 0.842 0.199 0.267 0.002540 × 20 × 1.2 1.2 1.2 0.702 0.894 0.545 0.340 0.642 0.617 0.847 0.234 0.321 0.004240 × 20 × 1.6 1.6 1.6 0.913 1.16 0.560 0.429 0.858 0.607 0.859 0.298 0.429 0.009640 × 20 × 2 2 2 1.11 1.42 0.575 0.506 1.07 0.598 0.871 0.355 0.537 0.0182

40 × 25 × 1

40 25

1 1 0.671 0.854 0.734 0.543 0.535 0.797 0.791 0.307 0.267 0.002840 × 25 × 1.2 1.2 1.2 0.796 1.01 0.742 0.636 0.643 0.792 0.796 0.362 0.321 0.004840 × 25 × 1.6 1.6 1.6 1.04 1.32 0.758 0.810 0.859 0.782 0.806 0.465 0.430 0.011040 × 25 × 2 2 2 1.27 1.62 0.774 0.965 1.08 0.772 0.816 0.559 0.539 0.0209

40 × 35 × 1

40 35

1 1 0.828 1.05 1.16 1.37 0.536 1.14 0.713 0.584 0.268 0.003540 × 35 × 1.2 1.2 1.2 0.985 1.25 1.17 1.61 0.644 1.13 0.716 0.691 0.322 0.005940 × 35 × 1.6 1.6 1.6 1.29 1.64 1.18 2.07 0.862 1.12 0.724 0.895 0.431 0.013740 × 35 × 2 2 2 1.58 2.02 1.20 2.50 1.08 1.11 0.733 1.09 0.541 0.0262

40 × 40 × 1

40 40

1 1 0.906 1.15 1.38 1.97 0.536 1.31 0.681 0.751 0.268 0.003840 × 40 × 1.2 1.2 1.2 1.08 1.37 1.39 2.32 0.644 1.30 0.685 0.890 0.322 0.006540 × 40 × 1.6 1.6 1.6 1.42 1.80 1.41 3.00 0.863 1.29 0.692 1.16 0.432 0.015140 × 40 × 2 2 2 1.74 2.22 1.43 3.62 1.09 1.28 0.700 1.41 0.543 0.0289

40 × 45 × 1

40 45

1 1 0.985 1.25 1.61 2.71 0.536 1.47 0.654 0.937 0.268 0.004140 × 45 × 1.2 1.2 1.2 1.17 1.49 1.62 3.21 0.645 1.46 0.657 1.11 0.322 0.007140 × 45 × 1.6 1.6 1.6 1.54 1.96 1.64 4.15 0.865 1.45 0.664 1.45 0.432 0.016540 × 45 × 2 2 2 1.90 2.42 1.66 5.02 1.09 1.44 0.671 1.77 0.544 0.0315

45 × 25 × 1

45 25

1 1 0.710 0.904 0.696 0.565 0.761 0.790 0.917 0.313 0.338 0.003045 × 25 × 1.2 1.2 1.2 0.843 1.07 0.704 0.663 0.914 0.785 0.922 0.369 0.406 0.005145 × 25 × 1.6 1.6 1.6 1.10 1.40 0.720 0.845 1.22 0.776 0.933 0.474 0.543 0.011745 × 25 × 2 2 2 1.35 1.72 0.735 1.01 1.53 0.766 0.944 0.571 0.680 0.0222

45 × 35 × 1

45 35

1 1 0.867 1.10 1.11 1.43 0.762 1.14 0.830 0.596 0.338 0.003645 × 35 × 1.2 1.2 1.2 1.03 1.31 1.12 1.68 0.915 1.13 0.834 0.706 0.407 0.006245 × 35 × 1.6 1.6 1.6 1.35 1.72 1.13 2.17 1.22 1.12 0.843 0.915 0.544 0.014445 × 35 × 2 2 2 1.66 2.12 1.15 2.61 1.53 1.11 0.851 1.11 0.682 0.0275

BS

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Area of section

Centre of gravity




45 × 45 × 1

45 45

1 1 1.02 1.30 1.55 2.83 0.762 1.47 0.764 0.958 0.339 0.004345 × 45 × 1.2 1.2 1.2 1.22 1.55 1.56 3.35 0.916 1.47 0.768 1.14 0.407 0.007445 × 45 × 1.6 1.6 1.6 1.60 2.04 1.57 4.33 1.23 1.46 0.775 1.48 0.545 0.017145 × 45 × 2 2 2 1.98 2.52 1.59 5.26 1.54 1.44 0.782 1.81 0.684 0.0329

50 × 20 × 1

50 20

1 1 0.671 0.854 0.481 0.312 1.04 0.605 1.10 0.206 0.417 0.002850 × 20 × 1.2 1.2 1.2 0.796 1.01 0.488 0.365 1.25 0.600 1.11 0.241 0.501 0.004850 × 20 × 1.6 1.6 1.6 1.04 1.32 0.502 0.461 1.67 0.591 1.12 0.308 0.668 0.011050 × 20 × 2 2 2 1.27 1.62 0.517 0.547 2.09 0.581 1.14 0.368 0.837 0.0209

50 × 25 × 1

50 25

1 1 0.749 0.954 0.663 0.585 1.04 0.783 1.05 0.318 0.417 0.003150 × 25 × 1.2 1.2 1.2 0.891 1.13 0.670 0.686 1.25 0.778 1.05 0.375 0.501 0.005450 × 25 × 1.6 1.6 1.6 1.16 1.48 0.685 0.876 1.67 0.768 1.06 0.482 0.669 0.012450 × 25 × 2 2 2 1.43 1.82 0.700 1.05 2.09 0.759 1.07 0.582 0.838 0.0235

50 × 35 × 1

50 35

1 1 0.906 1.15 1.06 1.48 1.04 1.13 0.951 0.607 0.418 0.003850 × 35 × 1.2 1.2 1.2 1.08 1.37 1.07 1.75 1.25 1.13 0.955 0.719 0.501 0.006550 × 35 × 1.6 1.6 1.6 1.42 1.80 1.09 2.25 1.68 1.12 0.964 0.933 0.670 0.015150 × 35 × 2 2 2 1.74 2.22 1.10 2.72 2.10 1.11 0.973 1.13 0.840 0.0289

50 × 50 × 1

50 50

1 1 1.14 1.45 1.71 3.91 1.04 1.64 0.848 1.19 0.418 0.004850 × 50 × 1.2 1.2 1.2 1.36 1.73 1.72 4.63 1.26 1.63 0.851 1.41 0.502 0.008250 × 50 × 1.6 1.6 1.6 1.79 2.28 1.74 6.01 1.68 1.62 0.858 1.84 0.672 0.019250 × 50 × 2 2 2 2.21 2.82 1.76 7.32 2.11 1.61 0.865 2.26 0.843 0.036950 × 50 × 3 3 3 3.21 4.09 1.81 10.3 3.20 1.58 0.885 3.21 1.28 0.119

50 × 65 × 1

50 65

1 1 1.38 1.75 2.40 7.95 1.05 2.13 0.772 1.94 0.418 0.005850 × 65 × 1.2 1.2 1.2 1.64 2.09 2.41 9.44 1.26 2.12 0.775 2.31 0.503 0.010050 × 65 × 1.6 1.6 1.6 2.17 2.76 2.43 12.3 1.68 2.11 0.780 3.02 0.673 0.023350 × 65 × 2 2 2 2.68 3.42 2.45 15.1 2.12 2.10 0.787 3.72 0.846 0.044950 × 65 × 3 3 3 3.92 4.99 2.50 21.3 3.23 2.07 0.804 5.34 1.29 0.146

65 × 65 × 1

65 65

1 1 1.49 1.90 2.21 8.72 2.29 2.14 1.10 2.03 0.705 0.006365 × 65 × 1.2 1.2 1.2 1.79 2.27 2.22 10.4 2.75 2.13 1.10 2.42 0.847 0.010865 × 65 × 1.6 1.6 1.6 2.36 3.00 2.24 13.5 3.68 2.12 1.11 3.18 1.13 0.025365 × 65 × 2 2 2 2.92 3.72 2.26 16.6 4.61 2.11 1.11 3.91 1.42 0.048965 × 65 × 3 3 3 4.27 5.44 2.31 23.6 6.97 2.08 1.13 5.63 2.14 0.160

BS

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© B

SI 07-1999

21



Area of section

Centre of gravity


B × D × t B D t r About About About About About About K

Cx X–X Y–Y X–X Y–Y X–X Y–Y


65 × 80 × 1

65 80

1 1 1.73 2.20 2.89 15.3 2.29 2.63 1.02 2.99 0.706 0.007365 × 80 × 1.2 1.2 1.2 2.07 2.63 2.90 18.2 2.76 2.63 1.02 3.56 0.848 0.012665 × 80 × 1.6 1.6 1.6 2.73 3.48 2.92 23.8 3.68 2.61 1.03 4.69 1.13 0.029465 × 80 × 2 2 2 3.39 4.32 2.94 29.2 4.62 2.60 1.03 5.78 1.42 0.056965 × 80 × 3 3 3 4.98 6.34 2.99 41.9 7.00 2.57 1.05 8.38 2.15 0.187

80 × 65 × 1.2

80 65

1.2 1.2 1.93 2.45 2.06 11.1 5.13 2.13 1.45 2.51 1.28 0.011780 × 65 × 1.6 1.6 1.6 2.55 3.24 2.08 14.6 6.84 2.12 1.45 3.30 1.71 0.027480 × 65 × 2 2 2 3.15 4.02 2.10 17.9 8.57 2.11 1.46 4.06 2.14 0.052980 × 65 × 3 3 3 4.62 5.89 2.14 25.6 12.9 2.08 1.48 5.86 3.23 0.173

80 × 80 × 1.2

80 80

1.2 1.2 2.21 2.81 2.72 19.5 5.13 2.63 1.35 3.70 1.28 0.013480 × 80 × 1.6 1.6 1.6 2.92 3.72 2.74 25.6 6.85 2.62 1.36 4.87 1.71 0.031580 × 80 × 2 2 2 3.62 4.62 2.76 31.5 8.57 2.61 1.36 6.01 2.14 0.060980 × 80 × 3 3 3 5.33 6.79 2.81 45.3 12.9 2.58 1.38 8.73 3.23 0.200

BS

2994:1976

22©

BS

I 07-1999

Table 10 — Zed sections


Area of section


Angle Elastic modulus Product moment

of inertia

Torsion constant

Warping constant

D × B × t B D t r About X–X

AboutY–Y

About U–U

About V–V

About V–V

min. ! About X–X

AboutY–Y

About U–U

About V–V

About XY

K Iw

mm mm mm mm mm kg/m cm2 cm4 cm4 cm4 cm4 cm tan ! cm3 cm3 cm3 cm3 cm4 cm4 cm6

40 × 20 × 1.640 20

1.6 1.6 0.926 1.18 2.84 0.756 3.34 0.260 0.469 0.439 1.42 0.394 1.28 0.255 1.13 0.0098 1.67

40 × 20 × 2 2 2 1.13 1.44 3.38 0.917 3.99 0.306 0.461 0.445 1.69 0.482 1.54 0.305 1.37 0.0187 1.94

50 × 25 × 1.6

50 25

1.6 1.6 1.18 1.50 5.76 1.51 6.74 0.531 0.595 0.433 2.30 0.625 2.07 0.411 2.27 0.0126 5.37

50 × 25 × 2 2 2 1.45 1.84 6.93 1.85 8.15 0.634 0.586 0.439 2.77 0.769 2.50 0.497 2.76 0.0240 6.36

50 × 25 × 3 3 3 2.08 2.65 9.44 2.60 11.2 0.845 0.565 0.452 3.78 1.11 3.45 0.685 3.89 0.0767 8.27

50 × 30 × 1.6

50 30

1.6 1.6 1.30 1.66 6.70 2.66 8.55 0.808 0.698 0.560 2.68 0.910 2.37 0.575 3.30 0.0139 8.91

50 × 30 × 2 2 2 1.60 2.04 8.09 3.25 10.4 0.967 0.688 0.567 3.23 1.12 2.88 0.696 4.04 0.0267 10.6

50 × 30 × 3 3 3 2.31 2.95 11.1 4.64 14.4 1.30 0.664 0.584 4.44 1.63 4.02 0.960 5.72 0.0857 14.0

75 × 25 × 1.6

75 25

1.6 1.6 1.49 1.90 15.0 1.51 15.9 0.690 0.603 0.240 4.01 0.626 3.77 0.455 3.44 0.0160 14.0

75 × 25 × 2 2 2 1.84 2.34 18.3 1.85 19.3 0.833 0.596 0.241 4.87 0.770 4.58 0.555 4.20 0.0307 16.8

75 × 25 × 3 3 3 2.67 3.40 25.4 2.61 26.8 1.14 0.580 0.246 6.77 1.11 6.39 0.785 5.96 0.0992 22.5

75 × 40 × 2

75 40

2 2 2.31 2.94 26.3 7.91 31.5 2.68 0.955 0.471 7.00 2.03 6.23 1.33 11.1 0.0387 63.1

75 × 40 × 3 3 3 3.37 4.30 37.1 11.4 44.7 3.74 0.933 0.480 9.88 2.97 8.86 1.89 16.0 0.126 86.9

75 × 40 × 4 4 4 4.38 5.57 46.4 14.7 56.5 4.62 0.911 0.490 12.4 3.86 11.2 2.38 20.5 0.289 106

100 × 25 × 1.6

100 25

1.6 1.6 1.81 2.30 30.3 1.51 31.0 0.794 0.588 0.156 6.05 0.626 5.83 0.483 4.61 0.0194 27.2

100 × 25 × 2 2 2 2.23 2.84 36.9 1.85 37.8 0.963 0.582 0.157 7.38 0.771 7.11 0.592 5.64 0.0374 32.7

100 × 25 × 3 3 3 3.26 4.15 51.9 2.62 53.2 1.34 0.569 0.159 10.4 1.11 10.0 0.846 8.03 0.122 44.5

100 × 25 × 4 4 4 4.22 5.37 64.8 3.29 66.5 1.66 0.556 0.160 13.0 1.43 12.5 1.08 10.1 0.278 53.4

BS

2994:1976

© B

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23

Table 10 — Zed sections


Area of section



of inertia

Torsion constant

Warping constant

D × B × t D B t r About X–X

AboutY–Y

About U–U

About V–V

About V–V

min. ! About X–X

AboutY–Y

About U–U

About V–V

About XY

K Iw

mm mm mm mm mm kg/m cm2 cm4 cm4 cm4 cm4 cm tan ! cm3 cm3 cm3 cm3 cm4 cm4 cm6

100 × 40 × 2100 40

2 2 2.70 3.44 51.3 7.92 55.9 3.29 0.977 0.310 10.3 2.03 9.43 1.43 14.9 0.0454 125100 × 40 × 3 3 3 3.96 5.05 73.1 11.4 79.9 4.64 0.959 0.315 14.6 2.97 13.5 2.05 21.6 0.149 174100 × 40 × 4 4 4 5.16 6.57 92.5 14.7 101 5.82 0.941 0.320 18.5 3.86 17.1 2.62 27.7 0.342 215

130 × 40 × 2

130 40

2 2 3.17 4.04 95.7 7.92 99.8 3.79 0.969 0.212 14.7 2.03 13.9 1.51 19.5 0.0534 229130 × 40 × 3 3 3 4.67 5.95 137 11.4 143 5.40 0.953 0.214 21.1 2.97 20.0 2.19 28.2 0.176 323130 × 40 × 4 4 4 6.10 7.77 175 14.7 183 6.84 0.938 0.216 27.0 3.87 25.6 2.82 36.4 0.406 403130 × 40 × 5 5 7.5 7.42 9.45 206 17.7 216 7.91 0.915 0.222 31.7 4.72 30.2 3.35 44.1 0.770 457

130 × 60 × 3130 60

3 3 5.61 7.15 186 40.1 211 15.2 1.46 0.382 28.6 6.85 25.8 4.66 65.2 0.212 1 010130 × 60 × 4 4 4 7.36 9.37 239 52.1 271 19.3 1.44 0.386 36.7 8.98 33.3 6.02 84.8 0.491 1 280130 × 60 × 5 5 7.5 8.99 11.5 284 63.5 325 22.6 1.41 0.395 43.7 11.0 39.9 7.20 103 0.937 1 490

150 × 40 × 3150 40

3 3 5.14 6.55 195 11.4 201 5.80 0.941 0.173 26.0 2.97 24.9 2.26 32.7 0.194 450150 × 40 × 4 4 4 6.73 8.57 249 14.7 257 7.37 0.927 0.174 33.3 3.87 31.9 2.92 42.1 0.449 564150 × 40 × 5 5 7.5 8.21 10.5 295 17.7 304 8.60 0.907 0.178 39.3 4.72 37.8 3.49 51.1 0.854 644

150 × 60 × 3150 60

3 3 6.08 7.75 260 40.1 283 16.7 1.47 0.310 34.6 6.85 31.8 4.82 75.5 0.230 1 420150 × 60 × 4 4 4 7.99 10.2 335 52.1 366 21.3 1.45 0.313 44.6 8.98 41.1 6.25 98.2 0.534 1 810150 × 60 × 5 5 7.5 9.78 12.5 400 63.5 439 25.1 1.42 0.320 53.4 11.0 49.3 7.51 120 1.02 2 120

BS

2994:1976

24©

BS

I 07-1999

Table 11 — Lipped zed sections


Area of section



of inertia

Torsion constant

Warping constant

D × B × C × t D B C t r About X–X

AboutY–Y

About U–U

About V–V

About V–V

min. ! About X–X

AboutY–Y

About U–U

About V–V

About XY

K Iw

mm mm mm mm mm mm kg/m cm2 cm4 cm4 cm4 cm4 cm tan ! cm3 cm3 cm3 cm3 cm4 cm4 cm6

120 × 45 × 20 × 1.6

120 45 20

1.6 1.6 2.98 3.80 82.7 19.4 94.5 7.55 1.41 0.397 13.8 4.38 13.5 2.87 29.8 0.0320 502120 × 45 × 20 × 2 2 2 3.68 4.69 101 23.2 115 9.07 1.39 0.393 16.8 5.28 16.5 3.45 36.1 0.0614 599120 × 45 × 20 × 2.5 2.5 2.5 4.52 5.76 122 27.6 139 10.8 1.37 0.389 20.3 6.31 20.2 4.11 43.2 0.117 707

130 × 50 × 20 × 1.6

130 50 20

1.6 1.6 3.23 4.12 107 25.3 122 9.80 1.54 0.401 16.4 5.15 15.9 3.39 38.8 0.0347 757130 × 50 × 20 × 2 2 2 3.99 5.09 130 30.5 149 11.8 1.52 0.397 20.0 6.22 19.6 4.09 47.0 0.0667 907130 × 50 × 20 × 2.5 2.5 2.5 4.91 6.26 158 36.3 180 14.1 1.50 0.393 24.3 7.45 23.9 4.88 56.5 0.128 1 070

140 × 50 × 20 × 1.6

140 50 20

1.6 1.6 3.36 4.28 127 25.3 142 10.2 1.54 0.360 18.1 5.15 17.6 3.48 42.0 0.0361 888140 × 50 × 20 × 2 2 2 4.15 5.29 155 30.5 173 12.3 1.53 0.357 22.2 6.22 21.7 4.20 51.0 0.0694 1 060140 × 50 × 20 × 2.5 2.5 2.5 5.11 6.51 188 36.3 210 14.7 1.50 0.353 26.9 7.45 26.6 5.01 61.3 0.133 1 260

150 × 50 × 20 × 2150 50 20

2 2 4.31 5.49 183 30.5 200 12.8 1.52 0.323 24.4 6.23 23.9 4.29 54.9 0.0721 1 240150 × 50 × 20 × 2.5 2.5 2.5 5.31 6.76 222 36.3 243 15.2 1.50 0.319 29.6 7.45 29.3 5.13 66.1 0.138 1 470

165 × 50 × 20 × 2165 50 20

2 2 4.54 5.79 229 30.5 246 13.4 1.52 0.282 27.8 6.23 27.4 4.42 60.8 0.0761 1 520165 × 50 × 20 × 2.5 2.5 2.5 5.60 7.14 279 36.3 299 16.0 1.50 0.278 33.8 7.45 33.7 5.28 73.2 0.146 1 800

180 × 60 × 20 × 2

180 60 20

2 2 5.09 6.49 314 49.0 342 20.8 1.79 0.310 34.9 8.31 34.0 5.84 91.0 0.0854 2 820180 × 60 × 20 × 2.5 2.5 2.5 6.29 8.01 383 58.8 417 25.0 1.77 0.307 42.6 10.0 41.8 7.01 110 0.164 3 360180 × 60 × 20 × 3 3 3 7.45 9.50 450 67.5 488 28.8 1.74 0.304 49.9 11.5 49.3 8.08 128 0.279 3 850

BS

2994:1976

© B

SI 07-1999

25

Table 11 — Lipped zed sections


Area of section



of inertia

Torsion constant

Warping constant

D × B × C × t D B C t r About X–X

AboutY–Y

About U–U

About V–V

About V–V

min. ! About X–X

AboutY–Y

About U–U

About V–V

About XY

K Iw

mm mm mm mm mm mm kg/m cm2 cm4 cm4 cm4 cm4 cm tan ! cm3 cm3 cm3 cm3 cm4 cm4 cm6

190 × 60 × 20 × 2

190 60 20

2 2 5.25 6.69 357 49.0 384 21.4 1.79 0.287 37.5 8.31 36.7 5.93 96.3 0.0881 3 170

190 × 60 × 20 × 2.5 2.5 2.5 6.48 8.26 436 58.8 469 25.7 1.76 0.284 45.9 10.0 45.2 7.12 117 0.169 3 790

190 × 60 × 20 × 3 3 3 7.69 9.80 511 67.6 549 29.6 1.74 0.281 53.8 11.5 53.3 8.21 135 0.288 4 340

200 × 60 × 20 × 2

200 60 20

2 2 5.41 6.89 403 49.0 430 21.9 1.78 0.267 40.3 8.31 39.5 6.02 102 0.0907 3 550

200 × 60 × 20 × 2.5 2.5 2.5 6.68 8.51 493 58.8 525 26.3 1.76 0.264 49.3 10.0 48.6 7.23 123 0.175 4 240

200 × 60 × 20 × 3 3 3 7.92 10.1 578 67.6 615 30.3 1.73 0.261 57.8 11.5 57.5 8.33 143 0.297 4 860

215 × 75 × 20 × 2.5215 75 20

2.5 2.5 7.56 9.64 670 107 732 45.0 2.16 0.314 62.4 14.4 60.4 10.2 196 0.198 8 510

215 × 75 × 20 × 3 3 3 8.98 11.4 789 123 860 52.1 2.13 0.311 73.4 16.8 71.5 11.8 229 0.338 9 810

230 × 75 × 25 × 2.5 2.5 2.5 8.05 10.3 807 120 876 51.3 2.24 0.301 70.2 16.2 68.5 11.5 227 0.211 11 270

230 × 75 × 25 × 3230 75 25

3 3 9.57 12.2 951 139 1 030 59.7 2.21 0.298 82.7 18.9 81.1 13.3 266 0.360 13 050

230 × 75 × 25 × 4 4 4 12.5 15.9 1 220 173 1 320 74.6 2.16 0.293 106 23.7 105 16.7 336 0.833 16 140

250 × 75 × 25 × 3250 75 25

3 3 10.0 12.8 1 160 139 1 240 62.2 2.20 0.264 92.8 18.9 91.4 13.7 290 0.378 15 670

250 × 75 × 25 × 4 4 4 13.1 16.7 1 490 173 1 590 77.7 2.15 0.259 119 23.7 119 17.1 367 0.876 19 400

BS

2994:1976

26©

BS

I 07-1999

Table 12 — Plain channels back to back

S cg = distance between centroids such that lyy = lxx


Area of section

Moment of inertia Radius of gyration Elastic modulus Warping Constant

Centroid centres when

Iyy = IxxD × 2B × t D 2B t r About

X–XAbout

Y–YAbout

X–XAbout

Y–YAbout

X–XAbout

Y–YIw Scg

mm mm mm mm mm kg/m cm2 cm4 cm4 cm cm cm3 cm3 cm6 cm

100 × 80 × 1.6

100 80

1.6 1.6 4.36 5.56 83.8 13.7 3.88 1.57 16.8 3.42 291 7.36100 × 80 × 2 2 2 5.41 6.89 103 17.1 3.86 1.58 20.5 4.28 349 7.32100 × 80 × 3 3 3 7.92 10.1 146 25.8 3.81 1.60 29.2 6.44 470 7.21100 × 80 × 4 4 4 10.3 13.1 185 34.5 3.75 1.62 37.0 8.62 560 7.10

120 × 100 × 3120 100

3 3 9.81 12.5 268 50.2 4.63 2.00 44.6 10.0 1 410 8.72120 × 100 × 4 4 4 12.8 16.3 342 67.1 4.57 2.03 57.0 13.4 1 720 8.62120 × 100 × 5 5 7.5 15.6 19.9 404 84.2 4.51 2.06 67.4 16.8 1 910 8.48

150 × 100 × 3150 100

3 3 11.2 14.3 455 50.3 5.64 1.87 60.6 10.1 2 230 10.9150 × 100 × 4 4 4 14.7 18.7 584 67.2 5.58 1.89 77.9 13.4 2 730 10.8150 × 100 × 5 5 7.5 18.0 22.9 695 84.5 5.51 1.92 92.7 16.9 3 080 10.6

180 × 100 × 3180 100

3 3 12.6 16.1 706 50.3 6.62 1.77 78.5 10.1 3 240 12.9180 × 100 × 5 5 7.5 20.3 25.9 1 090 84.7 6.48 1.81 121 16.9 4 520 12.7

200 × 100 × 4200 100

4 4 17.9 22.7 1 180 67.5 7.20 1.72 118 13.5 4 950 14.1200 × 100 × 5 5 7.5 21.9 27.9 1 420 84.9 7.12 1.74 142 17.0 5 640 14.0200 × 100 × 6 6 9 25.9 33.0 1 640 103 7.05 1.76 164 20.5 6 180 13.8

BS

2994:1976

© B

SI 07-1999

27

Table 12 — Plain channels back to backScg = distance between centroids such that Iyy = Ixx


Area of section

Moment of inertia

Radius of gyration

Elastic modulus Warping Constant

Centroid centres when Iyy = Ixx

D × 2B × t D 2B t r About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Iw Scg

mm mm mm mm mm kg/m cm2 cm4 cm4 cm cm cm3 cm3 cm6 cm

200 × 160 × 4

200 160

4 4 21.6 27.5 1 640 274 7.72 3.15 164 34.2 22 360 14.6

200 × 160 × 5 5 7.5 26.6 33.9 1 990 343 7.65 3.18 199 42.9 26 290 14.5

200 × 160 × 6 6 9 31.5 40.2 2 320 412 7.60 3.20 232 51.5 29 760 14.4

250 × 100 × 4

250 100

4 4 21.0 26.7 2 060 67.7 8.78 1.59 165 13.5 7 820 17.4

250 × 100 × 5 5 7.5 25.8 32.9 2 490 85.3 8.69 1.61 199 17.1 8 970 17.2

250 × 100 × 6 6 9 30.6 39.0 2 890 103 8.62 1.63 232 20.7 9 900 17.0

250 × 160 × 4

250 160

4 4 24.8 31.5 2 790 274 9.40 2.95 223 34.3 35 280 18.2

250 × 160 × 5 5 7.5 30.5 38.9 3 390 343 9.33 2.97 271 42.9 41 670 18.0

250 × 160 × 6 6 9 36.3 46.2 3 970 413 9.27 2.99 317 51.6 47 360 17.9

BS

2994:1976

28©

BS

I 07-1999

Table 13 — Inwardly lipped channels back to back

Scg = distance between centroids such that Iyy = Ixx


Area of section


Elastic modulus

Warping constant

Centroid centres when Iyy = Ixx

D × 2B × C × t D 2B C t r AboutX–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Iw Scg

mm mm mm mm mm mm kg/m cm2 cm4 cm4 cm cm cm3 cm3 cm6 cm

100 × 80 × 10 × 1.6 100 80 10 1.6 1.6 4.71 6.00 91.9 20.4 3.91 1.84 18.4 5.10 482 7.30

100 × 80 × 15 × 2 100 80 15 2 2 6.10 7.77 117 30.6 3.88 1.98 23.4 7.64 759 7.17

100 × 80 × 20 × 3 100 80 20 3 3 9.26 11.8 169 50.8 3.78 2.08 33.7 12.7 1 270 6.95

100 × 100 × 15 × 2 100 100 15 2 2 6.73 8.57 136 54.6 3.99 2.52 27.2 10.9 1 360 7.06

100 × 100 × 20 × 3 100 100 20 3 3 10.2 13.0 197 89.9 3.89 2.63 39.4 18.0 2 270 6.83

100 × 100 × 25 × 4 100 100 25 4 4 13.7 17.5 251 130 3.79 2.73 50.2 26.0 3 340 6.58

100 × 100 × 25 × 5 100 100 25 5 7.5 16.3 20.8 285 149 3.70 2.67 57.0 29.7 3 440 6.45

120 × 100 × 15 × 2 120 100 15 2 2 7.36 9.37 208 54.6 4.71 2.41 34.7 10.9 1 930 8.69

120 × 100 × 20 × 3 120 100 20 3 3 11.1 14.2 304 90.0 4.63 2.52 50.7 18.0 3 170 8.48

120 × 100 × 25 × 4120 100 25

4 4 15.0 19.1 392 130 4.53 2.61 65.3 26.0 4 620 8.25

120 × 100 × 25 × 5 5 7.5 17.9 22.8 449 149 4.44 2.55 74.8 29.7 4 780 8.11

150 × 100 × 20 × 3 150 100 20 3 3 12.6 16.0 519 90.0 5.69 2.37 69.1 18.0 4 820 10.8

150 × 100 × 25 × 4150 100 25

4 4 16.9 21.5 675 130 5.61 2.46 90.0 26.1 6 930 10.6

150 × 100 × 25 × 5 5 7.5 20.3 25.8 781 149 5.50 2.40 104 29.8 7 220 10.4

180 × 100 × 20 × 3 180 100 20 3 3 14.0 17.8 805 90.1 6.73 2.25 89.5 18.0 6 810 13.0

180 × 100 × 25 × 4180 100 25

4 4 18.8 23.9 1 060 130 6.65 2.34 117 26.1 9 720 12.8

180 × 100 × 25 × 5 5 7.5 22.6 28.8 1 230 149 6.53 2.28 137 29.8 10 170 12.6

BS

2994:1976

© B

SI 07-1999

29

Table 13 — Inwardly lipped channels back to backScg = distance between centroids such that Iyy = Ixx


Area of section

Moment of inertia

Radius of gyration

Elastic modulus

Warping constant


Iyy = Ixx

D × 2B × C × t D 2B C t r About X–X

AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

Iw Scg


200 × 100 × 20 × 3 200 100 20 3 3 14.9 19.0 1 040 90.1 7.40 2.18 104 18.0 8 330 14.4

200 × 100 × 25 × 4200 100 25

4 4 20.0 25.5 1 370 130 7.33 2.26 137 26.1 11 840 14.2

200 × 100 × 25 × 5 5 7.5 24.2 30.8 1 600 149 7.21 2.20 160 29.9 12 420 14.0

200 × 160 × 20 × 3 200 100 20 3 3 17.7 22.6 1 390 309 7.84 3.70 139 38.7 29 520 14.6

200 × 160 × 25 × 4200 160 25

4 4 23.8 30.3 1 830 441 7.77 3.81 183 55.1 41 780 14.4

200 × 160 × 25 × 5 5 7.5 28.9 36.8 2 170 516 7,68 3.74 217 64.4 46 210 14.3

250 × 100 × 20 × 3 250 100 20 3 3 17.3 22.0 1 800 90.2 9.04 2.03 144 18.0 12 790 17.8

250 × 100 × 25 × 4250 100 25

4 4 23.2 29.5 2 380 131 8.98 2.11 190 26.1 18 060 17.6

250 × 100 × 25 × 5 5 7.5 28.1 35.8 2 800 150 8.85 2.05 224 30.0 19 030 17.4

250 × 160 × 20 × 3 250 160 20 3 3 20.1 25.6 2 350 310 9.58 3.48 188 38.7 45 590 18.3

250 × 160 × 25 × 4250 160 25

4 4 26.9 34.3 3 110 441 9.52 3.59 248 55.1 64 170 18.2

250 × 160 × 25 × 5 5 7.5 32.8 41.8 3 700 516 9.41 3.51 296 64.5 71 210 18.0

BS

2994:1976

30©

BS

I 07-1999

Table 14 — Inwardly lipped channels lip to lip

Scg = distance between centroids such that Iyy = Ixx


Area of section

Moment of inertia

Radius of gyration

Elastic modulus Torsion constant


Iyy = Ixx


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

K Scg


100 × 80 × 10 × 1.6 100 80 10 1.6 1.6 4.71 6.00 91.9 59.7 3.91 3.16 18.4 14.9 108 7.30

100 × 80 × 15 × 2 100 80 15 2 2 6.10 7.77 117 73.1 3.88 3.07 23.4 18.3 133 7.17

100 × 80 × 20 × 3 100 80 20 3 3 9.26 11.8 169 104 3.78 2.97 33.7 26.0 193 6.95

100 × 100 × 15 × 2 100 100 15 2 2 6.73 8.57 136 122 3.99 3.77 27.2 24.4 189 7.06

100 × 100 × 20 × 3 100 100 20 3 3 10.2 13.0 197 175 3.89 3.67 39.4 34.9 275 6.83

100 × 100 × 25 × 4 100 100 25 4 4 13.7 17.5 251 222 3.79 3.56 50.2 44.4 356 6.58

100 × 100 × 25 × 5 100 100 25 5 7.5 16.3 20.8 285 261 3.70 3.54 57.0 52.2 434 6.45

120 × 100 × 15 × 2 120 100 15 2 2 7.36 9.37 208 141 4.71 3.88 34.7 28.2 249 8.69

120 × 100 × 20 × 3 120 100 20 3 3 11.1 14.2 304 203 4.63 3.78 50.7 40.6 363 8.48

120 × 100 × 25 × 4120 100 25

4 4 15.0 19.1 392 259 4.53 3.68 65.3 51.8 470 8.25

120 × 100 × 25 × 5 5 7.5 17.9 22.8 449 306 4.44 3.66 74.8 61.2 576 8.11

150 × 100 × 20 × 3 150 100 20 3 3 12.6 16.0 519 245 5.69 3.92 69.1 49.0 502 10.8

150 × 100 × 25 × 4150 100 25

4 4 16.9 21.5 675 314 5.61 3.82 90.0 62.9 653 10.6

150 × 100 × 25 × 5 5 7.5 20.3 25.8 781 374 5.50 3.81 104 74.8 801 10.4

180 × 100 × 20 × 3 180 100 20 3 3 14.0 17.8 805 287 6.73 4.02 89.5 57.5 648 13.0

180 × 100 × 25 × 4180 100 25

4 4 18.8 23.9 1 060 370 6.65 3.93 117 73.9 844 12.8

180 × 100 × 25 × 5 5 7.5 22.6 28.8 1 230 442 6.53 3.92 137 88.3 1 040 12.6

BS

2994:1976

© B

SI 07-1999

31

Table 14 — Inwardly lipped channels lip to lipScg = distance between centroids such that Iyy = Ixx


Area of section

Moment of inertia

Radius of gyration

Elastic modulus Torsion constant


Iyy = Ixx


AboutY–Y

About X–X

AboutY–Y

About X–X

AboutY–Y

K Scg


200 × 100 × 20 × 3 200 100 20 3 3 14.9 19.0 1 040 316 7.40 4.08 104 63.1 748 14.4

200 × 100 × 25 × 4200 100 25

4 4 20.0 25.5 1 370 406 7.33 3.99 137 81.3 974 14.2

200 × 100 × 25 × 5 5 7.5 24.2 30.8 1 600 487 7.21 3.98 160 97.4 1 200 14.0

200 × 160 × 20 × 3 200 160 20 3 3 17.7 22.6 1 390 901 7.84 6.31 139 113 1 630 14.6

200 × 160 × 25 × 4200 160 25

4 4 23.8 30.3 1 830 1 170 7.77 6.22 183 146 2 130 14.4

200 × 160 × 25 × 5 5 7.5 28.9 36.8 2 170 1 420 7.68 6.20 217 177 2 640 14.3

250 × 100 × 20 × 3 250 100 20 3 3 17.3 22.0 1 800 386 9.04 4.19 144 77.3 1 000 17.8

250 × 100 × 25 × 4250 100 25

4 4 23.2 29.5 2 380 499 8.98 4.11 190 99.7 1 310 17.6

250 × 100 × 25 × 5 5 7.5 28.1 35.8 2 800 600 8.85 4.09 224 120 1 610 17.4

250 × 160 × 20 × 3 250 160 20 3 3 20.1 25.6 2 350 1 090 9.58 6.51 188 136 2 240 18.3

250 × 160 × 25 × 4250 160 25

4 4 26.9 34.3 3 110 1 410 9.52 6.42 248 177 2 940 18.2

250 × 160 × 25 × 5 5 7.5 32.8 41.8 3 700 1 720 9.41 6.41 296 215 3 640 18.0

BS 2994:1976

32 © BSI 07-1999

Appendix A Basis of calculation for reduction factors

As described in clause 3, slight thinning at the corners occurs when steel strip is cold roll formed. The actual geometrical properties are therefore different from the theoretical properties that would be calculated if no allowance were made for this thinning effect.The properties shown in the tables in this standard are the more accurate values, an allowance for the thinning at the corners having been made in accordance with the following formula:

wheretred is the reduced corner thickness (see diagram)

r is the internal radius (= t for sections up to and including 4 mm thick and = 1"t for sections over 4 mm up to and including 6 mm thick)t is the unreduced thickness# is the reduction factor

The reduction factor, #, is taken as 0.30 for and 0.35 for

The mean radius of curvature, rm, as used in the calculations is given by:

rm = r + 0.5tThere is a somewhat similar thinning effect in the case of the radii at the top of tee sections. This has been allowed for in the calculations of the properties tabulated in this standard, although the effect in this case is, in fact, very small indeed.

tredr # t+r 0.5t+--------------------

t =

rt-- 1.0= r

t-- 1.5.=

BS 2994:1976

© BSI 07-1999

Publication referred to

Addendum No. 1 (1975) to BS 449-2, The use of cold formed steel sections in building.

BS 2994:1976

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BS 2994 (Cold Rolled Steel Sections)

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