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US

AISC

A collection of W, M, S, HP, WT, MT, ST sections are predefined using inch as default length unit.

See Eccentricity for more details.

Syntax

To define a section, users can use the following commands.

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section US2D (1) (2) (3) [4] [5] [6]
# (1) string, designation
# (2) int, unique tag
# (3) int, material model tag
# [4] double, scale, default: 1.0
# [5] int, number of integration points along web height, default: 6
# [6] double, eccentricity, default: 0.0

section US3D (1) (2) (3) [4] [5] [6] [7]
# (1) string, designation
# (2) int, unique tag
# (3) int, material model tag
# [4] double, scale, default: 1.0
# [5] int, number of integration points along web height and flange width, default: 6
# [6] double, eccentricity of y axis, default: 0.0
# [7] double, eccentricity of z axis, default: 0.0

[available from v3.2]

Some T-sections are placed at the centre of the web, which is not always desired. Use US2DC and US3DC to automatically recenter the section to its barycenter.

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section US2DC (1) (2) (3) [4] [5]
section US3DC (1) (2) (3) [4] [5]
# (1) string, designation
# (2) int, unique tag
# (3) int, material model tag
# [4] double, scale, default: 1.0
# [5] int, number of integration points along web height (and flange width for 3D), default: 6

Remarks

  1. By default, inch is used as length unit, if users want to switch to another unit, set scale to corresponding values. For example, to use millimeter, scale=25.4.
  2. For 2D sections, the number of integration points is set to two using Gauss quadrature for flange.
  3. For 3D sections, along web/flange thickness, one integration point is used. along flange width and web height, the same number of integration points is used as defined by user.

Supported Designations

WT WT W W MT & ST M & S HP
WT22X167.5 WT9X155.5 W44X335 W18X311 MT6.25X6.2 M12.5X12.4 HP18X204
WT22X145 WT9X141.5 W44X290 W18X283 MT6.25X5.8 M12.5X11.6 HP18X181
WT22X131 WT9X129 W44X262 W18X258 MT6X5.9 M12X11.8 HP18X157
WT22X115 WT9X117 W44X230 W18X234 MT6X5.4 M12X10.8 HP18X135
WT20X327.5 WT9X105.5 W40X655 W18X211 MT6X5 M12X10 HP16X183
WT20X296.5 WT9X96 W40X593 W18X192 MT5X4.5 M10X9 HP16X162
WT20X251.5 WT9X87.5 W40X503 W18X175 MT5X4 M10X8 HP16X141
WT20X215.5 WT9X79 W40X431 W18X158 MT5X3.75 M10X7.5 HP16X121
WT20X198.5 WT9X71.5 W40X397 W18X143 MT4X3.25 M8X6.5 HP16X101
WT20X186 WT9X65 W40X372 W18X130 MT4X3.1 M8X6.2 HP16X88
WT20X181 WT9X59.5 W40X362 W18X119 MT3X2.2 M6X4.4 HP14X117
WT20X162 WT9X53 W40X324 W18X106 MT3X1.85 M6X3.7 HP14X102
WT20X148.5 WT9X48.5 W40X297 W18X97 MT2.5X9.45 M5X18.9 HP14X89
WT20X138.5 WT9X43 W40X277 W18X86 MT2X3 M4X6 HP14X73
WT20X124.5 WT9X38 W40X249 W18X76 ST12X60.5 M4X4.08 HP12X89
WT20X107.5 WT9X35.5 W40X215 W18X71 ST12X53 M4X3.45 HP12X84
WT20X99.5 WT9X32.5 W40X199 W18X65 ST12X50 M4X3.2 HP12X74
WT20X196 WT9X30 W40X392 W18X60 ST12X45 M3X2.9 HP12X63
WT20X165.5 WT9X27.5 W40X331 W18X55 ST12X40 S24X121 HP12X53
WT20X163.5 WT9X25 W40X327 W18X50 ST10X48 S24X106 HP10X57
WT20X147 WT9X23 W40X294 W18X46 ST10X43 S24X100 HP10X42
WT20X139 WT9X20 W40X278 W18X40 ST10X37.5 S24X90 HP8X36
WT20X132 WT9X17.5 W40X264 W18X35 ST10X33 S24X80
WT20X117.5 WT8X50 W40X235 W16X100 ST9X35 S20X96
WT20X105.5 WT8X44.5 W40X211 W16X89 ST9X27.35 S20X86
WT20X91.5 WT8X38.5 W40X183 W16X77 ST7.5X25 S20X75
WT20X83.5 WT8X33.5 W40X167 W16X67 ST7.5X21.45 S20X66
WT20X74.5 WT8X28.5 W40X149 W16X57 ST6X25 S18X70
WT18X462.5 WT8X25 W36X925 W16X50 ST6X20.4 S18X54.7
WT18X426.5 WT8X22.5 W36X853 W16X45 ST6X17.5 S15X50
WT18X401 WT8X20 W36X802 W16X40 ST6X15.9 S15X42.9
WT18X361.5 WT8X18 W36X723 W16X36 ST5X17.5 S12X50
WT18X326 WT8X15.5 W36X652 W16X31 ST5X12.7 S12X40.8
WT18X264.5 WT8X13 W36X529 W16X26 ST4X11.5 S12X35
WT18X243.5 WT7X436.5 W36X487 W14X873 ST4X9.2 S12X31.8
WT18X220.5 WT7X404 W36X441 W14X808 ST3X8.6 S10X35
WT18X197.5 WT7X365 W36X395 W14X730 ST3X6.25 S10X25.4
WT18X180.5 WT7X332.5 W36X361 W14X665 ST2.5X5 S8X23
WT18X165 WT7X302.5 W36X330 W14X605 ST2X4.75 S8X18.4
WT18X151 WT7X275 W36X302 W14X550 ST2X3.85 S6X17.25
WT18X141 WT7X250 W36X282 W14X500 ST1.5X3.75 S6X12.5
WT18X131 WT7X227.5 W36X262 W14X455 ST1.5X2.85 S5X10
WT18X123.5 WT7X213 W36X247 W14X426 S4X9.5
WT18X115.5 WT7X199 W36X231 W14X398 S4X7.7
WT18X128 WT7X185 W36X256 W14X370 S3X7.5
WT18X116 WT7X171 W36X232 W14X342 S3X5.7
WT18X105 WT7X155.5 W36X210 W14X311
WT18X97 WT7X141.5 W36X194 W14X283
WT18X91 WT7X128.5 W36X182 W14X257
WT18X85 WT7X116.5 W36X170 W14X233
WT18X80 WT7X105.5 W36X160 W14X211
WT18X75 WT7X96.5 W36X150 W14X193
WT18X67.5 WT7X88 W36X135 W14X176
WT16.5X193.5 WT7X79.5 W33X387 W14X159
WT16.5X177 WT7X72.5 W33X354 W14X145
WT16.5X159 WT7X66 W33X318 W14X132
WT16.5X145.5 WT7X60 W33X291 W14X120
WT16.5X131.5 WT7X54.5 W33X263 W14X109
WT16.5X120.5 WT7X49.5 W33X241 W14X99
WT16.5X110.5 WT7X45 W33X221 W14X90
WT16.5X100.5 WT7X41 W33X201 W14X82
WT16.5X84.5 WT7X37 W33X169 W14X74
WT16.5X76 WT7X34 W33X152 W14X68
WT16.5X70.5 WT7X30.5 W33X141 W14X61
WT16.5X65 WT7X26.5 W33X130 W14X53
WT16.5X59 WT7X24 W33X118 W14X48
WT15X195.5 WT7X21.5 W30X391 W14X43
WT15X178.5 WT7X19 W30X357 W14X38
WT15X163 WT7X17 W30X326 W14X34
WT15X146 WT7X15 W30X292 W14X30
WT15X130.5 WT7X13 W30X261 W14X26
WT15X117.5 WT7X11 W30X235 W14X22
WT15X105.5 WT6X168 W30X211 W12X336
WT15X95.5 WT6X152.5 W30X191 W12X305
WT15X86.5 WT6X139.5 W30X173 W12X279
WT15X74 WT6X126 W30X148 W12X252
WT15X66 WT6X115 W30X132 W12X230
WT15X62 WT6X105 W30X124 W12X210
WT15X58 WT6X95 W30X116 W12X190
WT15X54 WT6X85 W30X108 W12X170
WT15X49.5 WT6X76 W30X99 W12X152
WT15X45 WT6X68 W30X90 W12X136
WT13.5X269.5 WT6X60 W27X539 W12X120
WT13.5X184 WT6X53 W27X368 W12X106
WT13.5X168 WT6X48 W27X336 W12X96
WT13.5X153.5 WT6X43.5 W27X307 W12X87
WT13.5X140.5 WT6X39.5 W27X281 W12X79
WT13.5X129 WT6X36 W27X258 W12X72
WT13.5X117.5 WT6X32.5 W27X235 W12X65
WT13.5X108.5 WT6X29 W27X217 W12X58
WT13.5X97 WT6X26.5 W27X194 W12X53
WT13.5X89 WT6X25 W27X178 W12X50
WT13.5X80.5 WT6X22.5 W27X161 W12X45
WT13.5X73 WT6X20 W27X146 W12X40
WT13.5X64.5 WT6X17.5 W27X129 W12X35
WT13.5X57 WT6X15 W27X114 W12X30
WT13.5X51 WT6X13 W27X102 W12X26
WT13.5X47 WT6X11 W27X94 W12X22
WT13.5X42 WT6X9.5 W27X84 W12X19
WT12X185 WT6X8 W24X370 W12X16
WT12X167.5 WT6X7 W24X335 W12X14
WT12X153 WT5X56 W24X306 W10X112
WT12X139.5 WT5X50 W24X279 W10X100
WT12X125 WT5X44 W24X250 W10X88
WT12X114.5 WT5X38.5 W24X229 W10X77
WT12X103.5 WT5X34 W24X207 W10X68
WT12X96 WT5X30 W24X192 W10X60
WT12X88 WT5X27 W24X176 W10X54
WT12X81 WT5X24.5 W24X162 W10X49
WT12X73 WT5X22.5 W24X146 W10X45
WT12X65.5 WT5X19.5 W24X131 W10X39
WT12X58.5 WT5X16.5 W24X117 W10X33
WT12X52 WT5X15 W24X104 W10X30
WT12X51.5 WT5X13 W24X103 W10X26
WT12X47 WT5X11 W24X94 W10X22
WT12X42 WT5X9.5 W24X84 W10X19
WT12X38 WT5X8.5 W24X76 W10X17
WT12X34 WT5X7.5 W24X68 W10X15
WT12X31 WT5X6 W24X62 W10X12
WT12X27.5 WT4X33.5 W24X55 W8X67
WT10.5X137.5 WT4X29 W21X275 W8X58
WT10.5X124 WT4X24 W21X248 W8X48
WT10.5X111.5 WT4X20 W21X223 W8X40
WT10.5X100.5 WT4X17.5 W21X201 W8X35
WT10.5X91 WT4X15.5 W21X182 W8X31
WT10.5X83 WT4X14 W21X166 W8X28
WT10.5X73.5 WT4X12 W21X147 W8X24
WT10.5X66 WT4X10.5 W21X132 W8X21
WT10.5X61 WT4X9 W21X122 W8X18
WT10.5X55.5 WT4X7.5 W21X111 W8X15
WT10.5X50.5 WT4X6.5 W21X101 W8X13
WT10.5X46.5 WT4X5 W21X93 W8X10
WT10.5X41.5 WT3X12.5 W21X83 W6X25
WT10.5X36.5 WT3X10 W21X73 W6X20
WT10.5X34 WT3X7.5 W21X68 W6X15
WT10.5X31 WT3X8 W21X62 W6X16
WT10.5X27.5 WT3X6 W21X55 W6X12
WT10.5X24 WT3X4.5 W21X48 W6X9
WT10.5X28.5 WT3X4.25 W21X57 W6X8.5
WT10.5X25 WT2.5X9.5 W21X50 W5X19
WT10.5X22 WT2.5X8 W21X44 W5X16
WT2X6.5 W4X13