Framecad Structure Engineering Method PDF

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FRAMECAD Structure Engineering Method Using the Australian Cold formed steel Standard...

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FRAMECAD Structure Engineering Method

Version 9.2 – July 2020

FRAMECAD Structure Engineering Method July 2020

Disclaimer This document has been published for the purpose of providing information of a general nature only. Further, no guarantee, warranty, or any other form of assurance is given as to the accuracy, currency or completeness of the information provided. Accordingly, any reliance on, or use, by you of any information contained within this document for any purpose whatsoever shall be entirely at your own risk, and any liability to you is expressly disclaimed to the maximum extent permitted by law. ALL INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THIS DOCUMENT SUPERSEDES ALL PREVIOUS DOCUMENTS.

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FRAMECAD Structure Engineering Method July 2020

Contents Disclaimer

i

Intellectual Property Notice

i

Confidentiality

i

1

PREFACE

1

2

CAPABILITIES AND APPLICATIONS

2

2.1

FRAMECAD Structure Capabilities .......................................................................................... 2

2.2

FRAMECAD Structure Engineering Application ...................................................................... 2

3

4

DESIGN LOADS 3.1

Gravity Loads .......................................................................................................................... 4

3.2

Snow Loads ............................................................................................................................. 4 Wind Loads ............................................................................................................................. 4

3.3

4

3.3.1

Wind Definitions ..................................................................................................................... 4

3.3.2

Wind Pressure Calculations .................................................................................................... 5

8

WALL PANEL ENGINEERING

Design Loads for walls ............................................................................................................ 8

4.1 4.1.1

Wind Loads Calculation for walls ........................................................................................... 8

4.1.2

Point loads ............................................................................................................................ 12

4.1.3

Eccentric Axial LOADS (Nth AMERICAN STANDARDS ONLY) ................................................ 12 Stud Design ........................................................................................................................... 13

4.2 4.2.1

Stud Load Combinations ......................................................................................................13

4.2.2

Stud Capacities and Section Properties ................................................................................ 15

4.2.3

Stud Design Checks ..............................................................................................................16

4.3

Jamb Stud Design ................................................................................................................. 18

4.4

Header Design ...................................................................................................................... 18 4.4.1

Header Load Combinations .................................................................................................. 18

4.4.2

Header Capacities ................................................................................................................. 21

4.4.3

Header Design Check............................................................................................................ 24

4.4.4

Head and Sill Check .............................................................................................................. 25 Wall Panel Reaction.............................................................................................................. 27

4.5 4.5.1

IBC 2009 LRFD ......................................................................................................................27

4.5.2

IBC 2012 LRFD, IBC 2015 LRFD, AND IBC 2018 LRFD ............................................................ 27

4.5.3

IBC 2009 ASD ........................................................................................................................ 27

4.5.4

IBC 2012 ASD, IBC 2015 ASD, AND IBC 2018 ASD ................................................................. 27

4.5.5

ABNT NBR 14762:2009 ......................................................................................................... 27

4.5.6

CSA S136 2007 LSD AND NBCC 2010 .................................................................................... 27 ©2020 FRAMECAD Licensing Ltd ii

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FRAMECAD Structure Engineering Method July 2020

4.5.7

NBCC 2015 ............................................................................................................................ 28

4.5.8

NASH AS 2010, AS 3623-1993, NASH NZ 2010 and AS/NZS 1170:2002 .............................. 28

4.5.9

SANS 517:2013 ..................................................................................................................... 28

4.5.10

GB 50009-2012 ..................................................................................................................... 28

4.5.11

EN 1990:2002-MEAN and EN 1990:2002-GUST ................................................................... 28

4.5.12

SNIP 2.01.07-85:2011 ........................................................................................................... 28 Top Plate Analysis................................................................................................................. 29

4.6 4.6.1

Load Combinations ............................................................................................................... 29

4.6.2

Top Plate Design Check ........................................................................................................ 30 Bracing analysis .................................................................................................................... 31

4.7

5

4.7.1

Wind Force ........................................................................................................................... 31

4.7.2

Earthquake Force ................................................................................................................. 34

4.7.3

Bracing Resistance ................................................................................................................ 40

4.7.4

Strength METHOD: Bracing Density ..................................................................................... 43

4.7.5

Rigid Diaphragm Method (For the IBC, NBCC, AND CSA loading codes) .............................. 46

52

TRUSS ENGINEERING 5.1

Principles of Operations ....................................................................................................... 52

5.2

Options to take in account finished geometry and truss exposure ..................................... 52 5.2.1

Ceiling to top chord .............................................................................................................. 52

5.2.2

Suspended ceiling ................................................................................................................. 52

5.2.3

Shuttered conditions ............................................................................................................ 52 Design Loads for trusses ....................................................................................................... 52

5.3 5.3.1 5.3.2

Point Load............................................................................................................................. 59 Effective Length Factor ......................................................................................................... 59

5.4

6

Design Wind Loads ............................................................................................................... 53

5.4.1

In Line Truss .......................................................................................................................... 59

5.4.2

Back to Back Truss ................................................................................................................ 60

5.4.3

Truncated and User trusses.................................................................................................. 60

5.4.4

Serviceability Limits .............................................................................................................. 60

5.4.5

Truss Load Combinations ..................................................................................................... 61

5.4.6

Truss Capacities and Section Properties ..............................................................................64

5.4.7

Truss Design Checks ............................................................................................................. 66

5.4.8

Girder Truss .......................................................................................................................... 71

73

Floor Engineering

Principles of Operations ....................................................................................................... 73

6.1

Design Loads for Joists .........................................................................................................73

6.2 6.2.1

Point Load............................................................................................................................. 73 Joist Design ........................................................................................................................... 73

6.3 6.3.1

Serviceability Limits .............................................................................................................. 74

6.3.2

Joist Load Combinations ....................................................................................................... 74 ©2020 FRAMECAD Licensing Ltd iii

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FRAMECAD Structure Engineering Method July 2020

6.3.3

Joist Capacities and Section Properties ................................................................................ 76

6.3.4

Joist Design Checks ............................................................................................................... 76

6.3.5

JOIST USAGE ......................................................................................................................... 78

6.3.6

Joist Beam and Beam Bearer ................................................................................................ 79

APPENDIX A – AVAILABLE SECTION

80

APPENDIX B –STRUCTURE SECTION CAPACITIES CALCULATION FOLLOWING THE AISI S100/CSA S136 DESIGN CODES

81

LC section ............................................................................................................................. 81

B.1 B.1.1

Tension capacity ................................................................................................................... 81

B.1.2

Shear Capacity ...................................................................................................................... 81

B.1.3

Compression Capacity .......................................................................................................... 82

B.1.4

Bending Capacity .................................................................................................................. 82 OC section ............................................................................................................................ 84

B.2 B.2.1

Tension capacity .................................................................................................................. 84

B.2.2

Shear Capacity ..................................................................................................................... 84

B.2.3

Compression Capacity ......................................................................................................... 84

B.2.4

Bending Capacity .................................................................................................................. 84 LE section .............................................................................................................................85

B.3 B.3.1

Tension capacity .................................................................................................................. 85

B.3.2

Shear Capacity ..................................................................................................................... 85

B.3.3

Compression Capacity .......................................................................................................... 85

B.3.4

Bending Capacity .................................................................................................................. 85 OE section............................................................................................................................. 87

B.4 B.4.1

Tension capacity ................................................................................................................... 87

B.4.2

Shear Capacity ...................................................................................................................... 87

B.4.3

Compression Capacity .......................................................................................................... 87

B.4.4

Bending Capacity .................................................................................................................. 87

B.5

LD and LB section ................................................................................................................. 88

B.6

LCLE section .......................................................................................................................... 89

APPENDIX C –STRUCTURE SECTION CAPACITIES CALCULATION FOLLOWING THE ASNZS 4600:2005 DESIGN CODE 90 LC section ............................................................................................................................. 90

C.1 C.1.1

Tension capacity .................................................................................................................. 90

C.1.2

Shear Capacity ..................................................................................................................... 90

C.1.3

Compression Capacity ......................................................................................................... 90

C.1.4

Bending Capacity ................................................................................................................. 91 OC section ............................................................................................................................ 92

C.2 C.2.1

Tension capacity .................................................................................................................. 92

C.2.2

Shear Capacity ..................................................................................................................... 92

C.2.3

Compression Capacity ......................................................................................................... 92 ©2020 FRAMECAD Licensing Ltd iv

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FRAMECAD Structure Engineering Method July 2020

C.2.4

Bending Capacity ................................................................................................................. 92 LE section .............................................................................................................................93

C.3 C.3.1

Tension capacity .................................................................................................................. 93

C.3.2

Shear Capacity ..................................................................................................................... 93

C.3.3

Compression Capacity ......................................................................................................... 93

C.3.4

Bending Capacity ................................................................................................................. 93 OE section............................................................................................................................. 95

C.4 C.4.1

Tension capacity .................................................................................................................. 95

C.4.2

Shear Capacity ..................................................................................................................... 95

C.4.3

Compression Capacity ......................................................................................................... 95

C.4.4

Bending Capa...