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Structural Steel. Tutor to Guide British Standard to US J Jayanthi Chandran.
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Chapters-2. Steel Standard Steel Grades Bolt Standard Bolt Pitch Standard Weld Standard Dimensions Dimension Standards Secondary Steel Standards Tips & Tricks Drawings Coatings Fabrication Erection Commercial & Package.
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Standard codes.-3. www.lemarx-jsw.com. Fb:Jayanthi steel.
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Members-4. British standard Universal beam 127 x 76 x 13 to1016 x 305 x 487 Universal columns piles (UBP) 152 x 152 x 23 to 356 x 406 x 634Serial UBP 203 x 203 x 45 to 356 x 368 x 174 to 430 x 100 x 64 Parallel flange channels (PFC) 100 x 50 x 10 to range: 125 x 65 to 430 x 100 Asymmetric beams (ASB) Serial size range: 280 ASB 74 to 300 ASB 249 Equal Angles (EA) 120 x 120 x 8 to 200 x 200 x 24 to unequal angles (EA & UA) Unequal angles 200 x 100 x 10 to 200 x 150 x 18.
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dimension. Dimensions Metric - mm There is UK imperial too 20 = 3/4 25 = 1 30 = 1- 1/2 35 = 1- 3/8 40 = 1-1/4 45 = 1- 3/4 50 = 2 60 = 2 –3/8.
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Steel grades-6. UK Steel grades supplied: S355 S275(JR, J0, J2 & K2) S275JR- MAIN STEEL S355JR-SECONDARY STEEL In line with the European Standard classifications, structural steels must be referenced using standard symbols including but not limited to S, 235, J2, K2, C, Z, W, JR, and JO, where: ‘S’ denotes the fact that it is structural steel; ‘235’ which relates to the minimum yield strength of the steel (tested at a thickness of 16mm); ‘J2’, ‘K2’, ‘JR’, and ‘JO’ all demonstrate the material toughness in relation to the Charpy impact or ‘V’ notch test methodology; ‘W’ is weathering steel (atmospheric corrosion-resistant); ‘Z’ represents structural steel with improved strength perpendicular to the surface, and ‘C’ is cold-formed. 1. S275JOH Specification S275JOH is steel grade in EN 10219 specification, EN 10210 standard. And the most widely used specification is EN10219 standard, which is Cold formed welded structural hollow sections of non-alloy and fine grain steels. ..
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Steel grades-7. EU and US Equivalent Grades British En 10025 BS 4360 S235 JR –Secondary Steel S275 JR –Main Steel S355 JR- Secondary Steel S275JOH – (Secondary Steel).
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Bolt Standards-8. www.lemarx-jsw.com. Jayanthi steel : FB.
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Bolt pitch standards-9. www. lemarx-jsw.com. Bolt Size in Bolt Size in Inches Hole size in MM Hole size in Inches Metric M6 ¼ 8 3/16 M8 1/3 10 3/16 M10 3/8 12 7/16 M12 ½ 14 9/16 M16 5/8 18 11/16 M20 ¾ 22 13/16 M22 7/8 24 15/16 M24 1 26 1-1/16 M27 1-1/8 29 1- 3/16 M30 1- ¼ 33 M33 1- 3/8 36 M36 1- ½ 39 M42 1-3/4 45 M48 2 51 In metric hole dia = Bolt dia + 2mm more than 30 +3mm In imperial it is bolt dia+1/16” for over size bolt dia + 1/8”.
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BOLT connection details-10. Bolt Pitch Standard.
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Bolt Pitch Standards-11. Edge & End distance ( Given sheared edge) -- Bolt Size in Bolt Size in Inches Edge END PITCH GAUGE Metric M6 ¼ M8 1/3 M10 3/8 20 20 (7/8) 25 20 M12 ½ 20 ( 7/8 ) 24(1-1/8) 30 30 M16 5/8 25 (28 US-M) (1 1/8) 35 40 35 M20 ¾ 30 (34 US-M)(1 ¼) 40(1-1/2) 50 40 M22 7/8 40 (38 US –M) (1 ½) 45 (2) M24 1 40 (42 US-M) (1 ¾) 50 (2 -1/4) M27 1-1/8 45 (48 US-M) (2) 55 M30 1- ¼ 50 (52 US-M) (2 ¼) 60 M33 1- 3/8 M36 1- ½ M42 1-3/4 M48 2.
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BolT Assemblies- us-12. Grip length. Nominal bolt size inches Grip length ½ 11/16 5/8 7/8 ¾ 1 7/8 1 -1/8 1 1-1/4 1 1/8 1 -1/2 1 ¼ 1-5/8 1 3/8 1-3/4 1 ½ 1-7/5.
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Socket & wrench sizes-13. For Spanner size M16 1.5d+1mm above M16 1.5 d.
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Connection clearences -14. clearence. Bolt clearance.