HOLLOW STRUCTURAL SECTION
Standard | Tolerances | Packing | Making | Inspection and Testing | Availability of size range | Section properties
HOLLOW STRUCTURAL SECTION CSA G40.20-04
Standard
This specification is available in accordance with requirement of CSA G40.20-04 "Technical Committee on structural Steel" for hollow section, where CSA is abbreviation for Canadian Standards Association.
Tolerances
The tolerances on dimensions are established in accordance with standard CSA G40.20-04.
| Characteristics | Tolerances | |||
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| Outside dimensions of side | (H 2.5inch) |
 0.02inch |
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| H : Longest side | (2.5inch H3.5inch) |
0.03inch |
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| B : Shortest side | (3.5inchH5.5inch) |
0.04inch |
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(H 5.5inch) |
1% |
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| Wall Thickness(T) | -5%, +10% | |||
| Squareness of sides | 90 1.0 |
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| External corner radius | perimeter24inch |
perimeter24inch |
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| T0.109inch |
0.218inch | - | ||
| 0.109inchT0.134inch |
0.268inch | - | ||
| 0.134inchT0.156inch |
0.312inch | - | ||
| 0.156inchT0.188inch |
0.470inch | - | ||
| 0.188inchT0.250inch |
0.625inch | 0.750inch | ||
| 0.250inchT0.313inch |
0.785inch | 0.940inch | ||
| 0.313inchT0.375inch |
0.938inch | 1.125inch | ||
| 0.375inchT0.500inch |
1.250inch | 1.500inch | ||
| T0.500inch |
- | 3 x T | ||
| Straightness | 1/8inch / 1feet length (10.4mm/1m length) | |||
| Twist | (H1.5inch) |
0.050inch | ||
| (1.5inchH2.5inch) |
0.062inch | |||
| (2.5inchH4inch) |
0.075inch | |||
| (4inchH6inch) |
0.087inch | |||
| (6inchH8inch) |
0.100inch | |||
| (H8inch) |
0.112inch | |||
| Weight | -3.5%, +10% | |||
| Length(L) | (L24inch) -0.25inch and +0.5inch |
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| (L24inch) -0.25inch and +0.75inch |
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| NOTE 1) Outside dimensions are measured across the flats at positions at least 50mm from the end of the HSS. |
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Packing
In bare bundle, steel banded, or in bulk. Standard lengths are 24, 40 and 48 feet.
Marking
Each of the square and rectangular hollow sections shall be marked with the following information.
a)manufacturer's name b) specification designation c) grade letter d) dimension e) heat number
Inspection and Testing
CSA is subject to tensile testing and impact test in accordance with CSA G40.20-04.
| Size (inch) | Wall thickness (inch) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| BWG#7 | 3/16 | 4/16 | 5/16 | 6/16 | 8/16 | 10/16 | 12/16 | 14/16 | |||
0.180 |
0.188 | 0.250 | 0.313 | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | |||
| Square | Rectangular | mm/mm | 4.57 | 4.76 | 6.35 | 7.94 | 9.53 | 12.70 | 15.88 | 19.05 | 22.23 |
| 2x2 | 50.8x50.8 |  |
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| 3x2 | 76.2x50.8 |  |
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| 3x3 | 76.2x76.2 | |
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| 4x2 | 101.6x50.8 | |
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| 3.5x3.5 | 88.9x88.9 | |
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| 4x3 | 101.6x76.2 | |
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| 5x2 | 127x50.8 | |
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| 4x4 | 101.6x101.6 | |
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| 5x3 | 127x76.2 | |
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| 6x2 | 152.4x50.8 | |
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| 4.5x4.5 | 114.3x114.3 | |
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| 6x3 | 152.4x76.2 | |
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| 5x5 | 127x127 | |
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| 6x4 | 152.4x101.6 | |
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| 6x6 | 152.4x152.4 | |
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| 7x5 | 177.8x127 | |
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| 8x4 | 203.2x101.6 | |
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| 7x7 | 177.8x177.8 | |
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| 8x6 | 203.2x152.4 | |
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| 10x4 | 254x101.6 | |
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| 8x8 | 203.2x203.2 | |
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| 10x6 | 254x152.4 | |
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| 12x4 | 304.8x101.6 | |
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| 10x8 | 254x203.2 | |
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| 12x6 | 304.8x152.4 | |
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| 10x10 | 254x254 | |
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| 12x8 | 304.8x203.2 | |
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| 14x6 | 355.6x152.4 | |
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| 12x12 | 304.8x304.8 | |
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| 14x10 | 355.6x254 | |
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| 16x8 | 406.4x203.2 | |
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| 14x14 | 355.6x355.6 | |
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| 16x16 | 406.4x406.4 | |
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| 20x12 | 508x304.8 | |
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| 18x18 | 457.2x457.2 | |
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| 24x12 | 609.6x304.8 | |
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| 20x20 | 508x508 | |
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| 22x22 | 558.8x558.8 | |
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350W Standard size 
350W Special size (Delivery date and minimum quantity should be checked before ordering.)Section properties