1、BRITISH STANDARD CONFIRMED OCTOBER 1984 BS1161:1977 Specification for Aluminium alloy sections for structural purposes UDC 669.71423:669.71.018.29:691.714BS1161:1977 This British Standard, having been prepared under the directionof the Non-Ferrous Metals Standards Committee, waspublished under the a
2、uthorityof the Executive Board on 28 February1977 BSI 06-1999 First published March 1944 First revision February 1951 Second revision February 1977 The following BSI references relate to the work on this standard: Committee reference NFE/21 Draft for comment 74/41590 DC ISBN 0 580 09870 2 Cooperatin
3、g organizations The Non-Ferrous Metals Standards Committee, under whose super-vision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Aluminium Federation* Association of Bronze and Brass Founders B
4、ritish Electrical and Allied Manufacturers Association* British Lead Manufacturers Association British Non-Ferrous Metals Federation BNF Metals Technology Centre Copper Development Association Electrical Cable Makers Confederation Institute of British Foundrymen Institution of Mechanical Engineers (
5、Automobile Division)* Institution of Mining and Metallurgy Institution of Production Engineers Institution of Structural Engineers Lead Development Association Light Metal Founders Association London Metal Exchange Magnesium Industry Council Ministry of Defence* National Brassfoundry Association Non
6、-Ferrous Metal Stockists* Royal Institute of British Architects Society of Motor Manufacturers and Traders Limited* Tin Research Institute Zinc Development Association Individual manufacturers The Government department and the scientific and industrial organizations marked with an asterisk in the ab
7、ove list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of British Railway Carriage and Wagon Manufacturers Department of the Environment Institution of Engineers and Shipbuilders in Scotland Institution o
8、f Structural Engineers Lloyds Register of Shipping Shipbuilders and Repairers National Association Amendments issued since publication Amd. No. Date of issue Comments 4357 August 1983 Indicated by a sideline in the marginBS1161:1977 BSI 06-1999 i Contents Page Cooperating organizations Inside front
9、cover Foreword ii 1 Scope 1 2 References 1 3 Material 1 4 Sizes and tolerances 1 5 Symbols 1 Table 1 Aluminium alloys suitable for structural use 2 Table 2 Equal angle sections 3 Table 3 Unequal angle sections 4 Table 4 Channel sections 5 Table 5 I sections 6 Table 6 Tee sections 7 Table 7 Equal bul
10、b angle sections 8 Table 8 Unequal bulb angle sections 9 Table 9 Lipped channel sections 10 Table 10 Bulb tee sections 11 Table 11 Tolerances on length, width, depth and thickness 12 Table 12 Tolerances on open ends of channels and I sections 13 Table 13 Tolerances on straightness 13 Table 14 Tolera
11、nces on twist 13 Publications referred to Inside back coverBS1161:1977 ii BSI 06-1999 Foreword This British Standard is a revision in metric terms of the1951edition. It specifies the dimensional tolerances, geometrical properties and mass per unit length of a range of extruded sections commonly used
12、 for structural purposes in aluminium alloys. In preparing this revision advantage has been taken of the opportunity to extend the range of sections to include bulb angles, lipped channels and bulb tees, although the range of sizes has been slightly reduced. One important characteristic of the proce
13、ss used to produce these sections is that a wide range of profiles can be obtained, thus sections not listed in this standard can be made to the purchasers own requirements by agreement with the supplier. The profiles and properties specified in this British Standard are independent of alloy, except
14、 in respect of mass per unit length. A list of alloys commonly used for structural sections has been included for information, together with their tensile properties, conversion factors for mass per unit length and modulus of elasticity. The chemical composition and mechanical properties of alloys d
15、esignated5083,6063 and6082, together with the dimensional tolerances for sections in which these alloys are produced, are specified in BS1474. Similar information for alloys designated5454 and7020 is specified in BS4300/12 and BS4300/15 respectively. Thus BS1474, BS4300/12 and BS4300/15 should be qu
16、oted, as appropriate, to specify the alloy which is required when specifying structural sections to BS1161. 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 S
17、tandard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpor
18、ated. This will be indicated in the amendment table on the inside front cover.BS1161:1977 BSI 06-1999 1 1 Scope This British Standard specifies the dimensions, geometrical properties and mass per unit length of the following range of aluminium alloy sections. Information on the use of the sections a
19、nd the determination of the shear centre position is given in CP118. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Material The mass per metre of sections specified in Table 2to Table 10inclusive are based on the density of
20、pure aluminium of2.71 kg/dm 3 . Conversion factors to obtain the mass per metre for alloys are given in Table 1. The aluminium alloy of which the sections are made shall be specified by the purchaser and, unless otherwise agreed, shall be selected from the range given in Table 1. 4 Sizes and toleran
21、ces The sizes of the sections shall be in accordance with Table 2to Table 10and the dimensional tolerances shall comply with the following tables. For the purpose of establishing tolerances on width, depth and thickness, sections shall be divided into a series of equivalent rectangles that overlap w
22、here they intersect, an angle, for example, being divided into two rectangles. For determining the tolerances, the greater dimension of each such rectangle shall be the same as the corresponding outside dimension a or b and the thickness of each rectangle shall be that for the corresponding leg, fla
23、nge or web as if it were of uniform thickness. A maximum tolerance on concavity and convexity of0.05 mm per10 mm shall apply over the width of the section. The geometrical properties are based on sections with normal (unspecified) corner radii as follows. 5 Symbols For the purposes of this standard
24、the following notation is used. Sections From To mm mm Equal angles 30 30 120 120 Unequal angles 50 38 140 105 Channels 60 30 240 100 I sections 60 30 160 80 Tee sections 38 50 90 120 Equal bulb angles 50 50 120 120 Unequal bulb angles 50 37.5 140 105 Lipped channels 80 40 140 70 Bulb tees 75 90 150
25、 180 Table 11. Tolerances on length, width, depth and thickness Table 12. Tolerances on open ends of channels and I sections Table 13. Tolerances on straightness Table 14. Tolerances on twist Thickness of section Radius on corner mm mm Up to and including5 0.8 Over5 1.6 A Cross-sectional area a Dime
26、nsions of section b c c Distance of shear centre from back of section (values calculated in accordance with CP118) c xDistance of centroid from back of section c y I u Second moment of area about UU axis I v Second moment of area about VV axis I w Second moment of area about an axis at45 to the XX a
27、xis I x Second moment of area about XX axis I y Second moment of area about YY axis J Torsion constant (values calculated in accordance with CP118) R Radius Radius of gyration r x Radius of gyration about XX axis r y Radius of gyration about YY axis r u Radius of gyration about UU axis r I A - =BS11
28、61:1977 2 BSI 06-1999 Table 1 Aluminium alloys suitable for structural use r v Radius of gyration about VV axis t Thickness of section Angle between XX axis and UU axis w Mass of section per unit length in pure aluminium Z x Modulus of section about XX axis Z y Modulus of section about YY axis Z u M
29、odulus of section about UU axis Z v Modulus of section about VV axis Material designation Condition a 0.2%proof stress min. Tensile strength min. Modulus of elasticity 10 3 Minimum elongation Mass conversion factor compared with density of2.71 kg/dm 3of pure aluminium on a gauge length of5.65S o c o
30、n a gauge length of50 mm N/mm 2(= MPa) N/mm 2(= MPa) N/mm 2(= MPa) % % 5083 O 125 275 68.9 14 13 0.982 M b 130 280 12 11 6063 TE 110 150 65.5 8 7 0.996 TF 160 185 8 7 7020 TB 190 300 71.7 12 10 1.026 TF 280 340 10 8 6082 TF 255 295 68.9 8 7 0.996 5454 O 85 215 68.9 18 16 0.989 M b 100 215 16 14 a Th
31、e nomenclature used here is consistent with that employed in BS1474 from which the following extract is taken. M As manufactured. Material which acquires some temper from shaping processes in which there is no special control over thermal treatment or amount of strain hardening. O Annealed. Material
32、 which is fully annealed to obtain the lowest-strength condition. TB Solution heat-treated and naturally aged. Material which receives no cold work after solution heat treatment except as may be required to flatten or straighten it. Properties of some alloys in this temper are unstable. TE Cooled fr
33、om an elevated temperature shaping process and precipitation-treated. TF Solution heat-treated and precipitation-treated. b Properties of material in the M condition are given for information only. c Original cross-sectional area.BS 1161:1977 BSI 06-1999 3 Table 2 Equal angle sections Size Thickness
34、 Mass/unit length Area of section Centroid Second moments of area Radii of gyration Moduli of section Torsion constant mm mm kg/m mm 2 10 2 mm mm 4 10 4 mm mm 3 10 3 mm 4 10 4 a b t W A c xand c y I xand I y I u I v r xand r y r u r v Z xand Z y Z u Z v J Thin range 50 50 3 0.836 3.08 13.1 7.28 11.4
35、 3.12 15.4 19.2 10.1 1.97 3.23 1.65 0.123 60 60 3.5 1.17 4.31 15.7 14.7 23.1 6.31 18.5 23.1 12.1 3.32 5.44 2.78 0.233 80 80 5 2.23 8.23 21.1 49.5 77.7 21.3 24.5 30.7 16.1 8.40 13.7 7.02 0.922 100 100 6 3.34 12.3 26.3 116 183 50.0 30.7 38.5 20.1 15.8 25.9 13.2 1.97 120 120 7 4.68 17.3 31.4 235 370 11
36、0 36.9 46.3 24.2 26.6 43.6 22.3 3.72 Thick range 30 30 2.5 0.404 1.49 8.25 1.26 1.98 0.528 9.18 11.5 5.95 0.578 0.936 0.467 0.037 40 40 3 0.647 2.39 10.9 3.62 5.72 1.52 12.3 15.5 7.97 1.24 2.02 1.01 0.084 50 50 4 1.08 3.98 13.7 9.35 14.8 3.93 15.3 19.3 9.94 2.58 4.18 2.09 0.252 60 60 5 1.62 5.96 16.
37、5 20.1 31.8 8.46 18.4 23.1 11.9 4.62 7.49 3.74 0.595 80 80 6 2.59 9.55 21.8 57.9 91.5 24.3 24.6 31.0 15.9 9.94 16.2 8.09 1.35 100 100 8 4.31 15.9 27.4 150 236 62.9 30.7 38.6 19.9 20.6 33.4 16.7 4.03 120 120 10 6.47 23.9 33.0 322 508 135 36.7 46.2 23.8 37.0 59.9 29.9 9.52BS 1161:1977 4 BSI 06-1999 Ta
38、ble 3 Unequal angle sections Size Thickness Mass/unit length Area of section Centroid Second moments of area Radii of gyration Moduli of section Tan angle Torsion constant mm mm kg/m mm 2 10 2 mm mm 4 10 4 mm mm 3 10 3 mm 4 10 4 a b t w A c x c y I x I y I u I v r x r y r u r v Z x Z y Z u Z v J Thi
39、n range 50 38 3 0.738 2.72 14.7 9.05 6.72 3.35 8.21 1.86 15.7 11.1 17.4 8.27 1.90 1.16 2.32 0.945 0.553 0.112 60 45 3.5 1.03 3.79 17.7 10.6 13.5 6.52 16.4 3.65 18.9 13.1 20.8 9.82 3.20 1.90 3.88 1.55 0.539 0.213 80 60 5 1.96 7.23 23.6 14.3 45.6 21.9 55.2 12.3 25.1 17.4 27.6 13.0 8.08 4.79 9.78 3.91
40、0.538 0.838 100 75 6 2.94 10.8 29.5 17.8 107 51.6 130 28.9 31.4 21.8 34.6 16.3 15.2 9.01 18.4 7.37 0.538 1.79 120 90 7 4.11 15.2 35.3 21.3 216 104 262 58.5 37.8 26.2 41.6 19.6 25.6 15.2 31.0 12.4 0.539 3.38 140 105 8.5 5.83 21.5 41.3 24.9 416 200 504 112 44.0 30.5 48.4 22.8 42.2 25.0 51.0 20.4 0.538
41、 7.14 Thick range 50 38 4 0.947 3.50 15.3 9.54 8.60 4.28 10.5 2.34 15.7 11.1 17.4 8.18 2.48 1.50 3.02 1.21 0.558 0.227 60 45 5 1.41 5.22 18.5 11.3 18.4 8.85 22.4 4.88 18.8 13.0 20.7 9.68 4.44 2.63 5.34 2.11 0.542 0.532 80 60 6 2.26 8.35 24.5 14.8 53.0 25.6 64.5 14.1 25.2 17.5 27.8 13.0 9.55 5.66 11.
42、6 4.56 0.544 1.20 100 75 8 3.77 13.9 30.8 18.8 137 66.0 167 36.3 31.4 21.8 34.6 16.2 19.8 11.7 23.9 9.42 0.542 3.61 120 90 10 5.65 20.9 37.0 22.6 295 142 358 78.1 37.6 26.0 41.4 19.4 35.5 21.0 42.8 16.8 0.542 8.52 140 105 11 7.26 26.8 43.0 26.2 518 250 630 137 44.0 30.5 48.5 22.6 53.4 31.7 64.5 25.4
43、 0.543 13.1BS 1161:1977 BSI 06-1999 5 Table 4 Channel sections Size Thickness Mass/unit length Area of section Centroid Second moments of area Radii of gyration Moduli of section Torsion constant Shear centre from back of section mm mm kg/m mm 2 10 2 mm mm 4 10 4 mm mm 3 10 3 mm 4 10 4 mm Web Flange
44、 a b t 1 t 2 w A c x c y I x I y r x r y Z x Z y J c c 60 30 5 6 1.69 6.24 0 9.87 32.2 5.03 22.7 8.98 10.7 2.50 0.690 11.7 80 35 5 7 2.29 8.44 0 11.3 79.8 9.57 30.8 10.6 20.0 4.04 1.12 13.8 100 40 6 8 3.20 11.8 0 12.4 171 16.9 38.1 11.9 34.2 6.12 2.07 15.2 120 50 6 9 4.19 15.5 0 15.9 339 36.8 46.8 1
45、5.4 56.5 10.8 3.22 19.7 140 60 7 10 5.66 20.9 0 18.9 625 71.5 54.7 18.5 89.2 17.4 5.51 23.6 160 70 7 10 6.58 24.3 0 21.8 970 116 63.2 21.8 121 24.0 6.41 27.6 180 75 8 11 8.06 29.8 0 22.7 1480 159 70.5 23.1 164 30.5 9.63 29.0 200 80 8 12 9.19 33.9 0 24.5 2110 210 78.8 24.9 211 37.8 12.4 31.3 240 100
46、9 13 12.5 46.0 0 30.3 4170 450 95.2 31.2 345 64.6 20.2 39.2BS 1161:1977 6 BSI 06-1999 Table 5 I sections Size Thickness Mass/unit length Area of section Centroid Second moments of area Radii of gyration Moduli of section Torsion constant mm mm kg/m mm 2 10 2 mm mm 4 10 4 mm mm 3 10 3 mm 4 10 4 Web F
47、lange a b t 1 t 2 w A c xand c y I x I y r x r y Z x Z y J 60 30 4 6 1.59 5.83 0 31.6 2.76 23.3 6.89 10.5 1.84 0.753 80 40 5 7 2.54 9.38 0 91.6 7.63 31.2 9.02 22.9 3.82 1.69 100 50 6 8 3.72 13.7 0 210 17.0 39.2 11.1 42.1 6.80 3.30 120 60 6 9 4.77 17.6 0 403 32.8 47.8 13.6 67.2 10.9 4.76 140 70 7 10
48、6.33 23.4 0 725 57.9 55.7 15.7 104 16.5 8.00 160 80 7 11 7.64 28.2 0 1170 94.6 64.5 18.3 147 23.7 10.8BS 1161:1977 BSI 06-1999 7 Table 6 Tee sections Size Thickness Mass/unit length Area of section Centroid Second moments of area Radii of gyration Moduli of section Torsion constant mm mm kg/m mm 2 1
49、0 2 mm mm 4 10 4 mm mm 3 10 3 mm 4 10 4 a b t w A c x c y I x I y r x r y Z x Z y J 38 50 4 0.952 3.52 9.50 0 4.29 4.20 11.0 10.9 1.50 1.68 0.240 45 60 5 1.42 5.24 11.3 0 8.86 9.09 13.0 13.2 2.63 3.03 0.564 60 80 6 2.27 8.39 14.8 0 25.6 25.8 17.5 17.5 5.66 6.45 1.27 75 100 8 3.79 14.0 18.7 0 66.1 67.3 21.7 21.9 11.7 13.4 3.82 90 120 10 5.68 21.0 22.6 0 142 145 26.0 26.3 21.0 24.2 9.0
