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LENGTH RANGE DuraGal is stocked by distributors in the following lengths. Size Standard Length - m Non-Standard Lengths* - m 20 x 20 to 30 x 30 6.5 4.5 to 8.0 35 x 35 to 100 x 100 50 x 20 to 150 x 50 8.0 4.5 to 13.0 * Non-standard Lengths - Minimum order quantities and/or price extras may apply. CHEMISTRY Chemical Composition (Cast or Product), % max. C Si Mn P S Al CE 0.20 0.05 1.60 0.040 0.030 0.10 0.39 The carbon equivalent (CE) in the above is calculated for an actual composition using the following equation: CE C Mn Cr + Mo + V Ni + Cu = + + + 6 5 15 This value is used in AS/NZS 1554.1:2000 Structural steel welding - Welding of steel structures, to determine the welding preheat required. Steels with CE of less than 0.39 in general, do not require preheat. TOLERANCES Cross Section Outside Dimension Maximum permissible Maximum permissible d or b mm Variation from specified out-of-square at outside dimension (mm) corners (degree) < 50 ± 0.5 1 > 50 ± 0.01d or ± 0.01b d = outside depth of section b = outside breadth of section Thickness Mass Straightness ±10% of nominal Not less than 0.96 times nominal Specified length 500 Twist 2 mm plus 0.5 mm per metre of length DuraGal DESIGN CAPACITY TABLES DCTDHS/06 viii for STRUCTURAL STEEL HOLLOW SECTIONS MARCH 2002
Length Size Mill Cut Length Tolerance* 20 x 20 to 30 x 30 - 0 + 25mm 35 x 35 to 100 x 100 50 x 20 to 150 x 50 - 0 + 50mm * Exact lengths, subject to enquiry. Corner Radii Size Typical external Typical angle corner radii of arc t < 3mm 2.0t 75 ο t > 3mm 2.5t 75 o WELDING t = section thickness DuraGal is readily welded. Its thin, evenly applied galvanized coating ensures minimal welding fumes. However, the ventilation recommendations given in WTIA (Welding Technology Institute of Australia) Technical Note 7, July 1989 Table 17.2 should be observed. Mechanical dilution ventilation is advised for open work space and mechanical ventilation by local exhaust system for limited work space and confined space. DuraGal’s carbon equivalent of less than 0.39 allows it to be welded without preheat, in accordance with AS/NZS 1554.1:2000 Structural steel welding - Welding of steel structures. The following are recommended consumables. Process Recommended Consumables Manual Metal-Arc (AS/NZS 1553.1) E48XX (Grade 2) Gas-Metal-Arc (AS/NZS 2717.1) Submerged Arc (AS 1858.1) Flux-Cored Arc (AS 2203.1) W502 W502Y W502X.X For more advice reference should be made to the DuraGal Easy Welding Guide available from OneSteel. Further research [5], [7] has shown that the mechanical properties of cold-formed hollow <strong>sections</strong> are not reduced by a wide range of welding operations. The grade designations of cold-formed hollow <strong>sections</strong> based on yield strength are also not affected by hot dip galvanising. PAINTING DuraGal’s unique surface preparation and protective coating means painting and powder coating are easy and economical, and the result is a smooth attractive surface. Refer to the DuraGal Painting and Corrosion Protection Guide for more detailed information. POWDER COATING A degrease and zinc phosphate pretreatment prior to applying the powder coating is recommended. Refer to the OneSteel Powder Coating Guide for more detailed recommendations. DCTDHS/06 DuraGal DESIGN CAPACITY TABLES MARCH 2002 for STRUCTURAL STEEL HOLLOW SECTIONS ix
Page 1 and 2: DuraGal ® design capacity tables f
Page 3 and 4: CONTENTS Page Foreword ............
Page 5 and 6: PREFACE DuraGal RHS is manufactured
Page 7: GRADE DuraGal RHS is manufactured b
Page 11 and 12: LIMIT STATES TES DESIGN USING THESE
Page 13 and 14: PROPERTIES OF STEEL The properties
Page 15 and 16: M ry M s M sx M sy M z M * M * m M
Page 17 and 18: PART 1 SECTION PROPERTIES 1 PAGE D1
Page 19 and 20: D1.2.1.1 Torsion Constants The tors
Page 21 and 22: D1.2.3.1 Compactness In Clauses 5.2
Page 23 and 24: D1.3 PROPERTIES FOR FIRE DESIGN To
Page 25 and 26: Figure D1.4.2: Telescoping Data DCT
Page 27 and 28: DCTDHS/06 DuraGal DESIGN CAPACITY T
Page 33 and 34: TABLE D1.3-1(A) FIRE ENGINEERING DE
Page 35 and 36: TABLE D1.3-2(A) FIRE ENGINEERING DE
Page 37 and 38: TABLE D1.3-4 FIRE ENGINEERING DESIG
Page 39 and 40: TABLE D1.4-2 DuraGal TELESCOPING IN
Page 41 and 42: PART 2 DETERMINATION OF DESIGN ACTI
Page 43 and 44: Figure D2.2: First-order Analysis a
Page 45 and 46: PART 3 SECTION CAPACITIES 3 PAGE D3
Page 47 and 48: D3.2.3 Design Moment Section Capaci
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Page 51 and 52: TABLE D3.1-2 DESIGN SECTION CAPACIT
Page 53 and 54: PART 4 MEMBERS SUBECT TO BENDING 4
Page 55 and 56: D4.1.3 Segment Length for Full Late
Page 57 and 58: Table D4.1.5(1) Values of (M sx /M
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A rectangular hollow section is the
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2. Check the shear capacity of the
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End bearing for b d < 1.5d 5 d5 b b
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D4.4 BENDING AND BEARING INTERACTIO
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D4.5 CALCULATION OF BEAM DEFLECTION
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DCTDHS/06 DuraGal DESIGN CAPACITY T
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TABLE D4.3-1(A) DESIGN WEB CAPACITI
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TABLE D4.3-2(A) DESIGN WEB CAPACITI
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TABLE D4.3-4 DESIGN WEB CAPACITIES
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PART 5 MEMBERS SUBECT TO AXIAL COMP
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According to Clause 6.3.3 of AS 410
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In all cases L e / L > 0.5 (i) Chor
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[ BLANK ] DCTDHS/06 DuraGal DESIGN
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PART 6 MEMBERS SUBJECT TO AXIAL TEN
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D6.3 EXAMPLE 1. A tension member wi
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TABLE D6.1-3 DESIGN CAPACITIES FOR
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PART 7 MEMBERS SUBJECT TO COMBINED
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If an appropriate second order elas
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Determination of δ s Members with
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D7.4 COMBINED BENDING AND AXIAL COM
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(b) Out-of-plane capacity where φM
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D7.4.3.2 Member Capacity 14 . 14 .
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D7.5.2.1 Section Capacity For The v
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D7.6 BIAXIAL BENDING For a member s
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From Figure D7.3(1) the moment ampl
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D7.7 EXAMPLES Example 2.0 Braced Be
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Then φM rx * N = 118 . ⎛ ⎞ φM
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[ BLANK ] DCTDHS/06 DuraGal DESIGN
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PART 8 MAXIMUM DESIGN LOADS FOR BEA
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D8.2.2 Serviceability Limit State D
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D8.5 OTHER LOAD CONDITIONS The valu
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(b) Use of the Tables: Strength Lim
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DuraGal DESIGN CAPACITY TABLES DCTD
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[ BLANK ] Courtesy of Econo Steel r
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