Gerber Cantilever System

Gerber Cantilever System - magnum 830 was $30 @0959 853qu...

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Unformatted text preview: magnum 830 was $30 @0959 853qu mafia 5:33:00 woom fl “:ng ) brim “a Waé‘W 'mé. M. (mm; of w/ 273?, (6156.)! 69¢: ‘ (, ._. 63962: 6: Sn 3:39 E2w>m 9:2me umo. .mhmfid E993 9:23.. 32 52:9; @5265 mums 32:9; 2 96 Emamfi EmEoE iii! mcficg Boa: 233:: 22 Design Example 1 Cantilever Girder (G1) Design roof wind (end zone“) I (interior zone) (end zone“) I roof wind roof wind a: occurring independently 10 500 10 500 12000 12000 X 01 W460x74 Illustrated in the following design calculations are m'al selection and detailed design checks for G1. W410x54 é Lateral support conditions: x = bottom chord extension (BCE) T = BCE and acting as tiejoist Ioist line location 3 Notes: 1. including steel weight 2. roof snow 3. wind loads for strength design are computed using Commentary B, Supplement to the National Building Code of Canada, 1985. Design Example 1 Part 1 Trial Selection of Girder G1 (Continued Girder G1 bolted to facilitate W460x74 from trial selection steel frame plumbing. Bottom Chord Bottom Chord Extension Extension (assumed omitted) (Tie joist) (Tie joist) At each column support Assumed E Restraints E Girder GI W460x74 from trial selection I I i At joist-cantilever joint \ Bottom Chord (joist lines 11 and 19) EXtCnSlon (not needed as per calculation on P. 10) Girder section W460x74 (Class 1 section in bending - see Table 5-1 of Handbook) d=457mm Iy=16.6x105mm4 J=517x103mm4 b=l90mm w=9mm t=14.5mm Zx=1650x103mm3 cw=813x109mm6 k=3lmm Sx=1460x103mm3 a, e or f) Joist top chords provide a, e & g) Joist top lateral support ‘ chords provide h) _ I _Ze ! lateral support ml'momme‘n‘lt \ restraint c) Stiffeners < ’ prevent girder web crippling & a, b) Bottom 0 Bottom chord chord extension 30mm Chord extension provides provides (1) Cap plate extension on one 1mm] support support* thickness & side of column girder web may be omitted to stiffeners to minimize induced * Note: distribute loads bottom chord Bottom chord extension connection may force due to . be omitted, if the girder is torsionally moment resum‘ restrained about its longitudinal axis at vertical supports using "column continuity" design. Figure 9 Gerber Construction Details ...
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Gerber Cantilever System - magnum 830 was $30 @0959 853qu...

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