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PART EIGHT – TRADE SCIENCES

 

8A MECHANICAL PROPERTIES OF TIMBER FRAMES

 

DESCRIPTION Add your comment on this item1

 

Identify and describe the various loads that effect timber framed structures and the causes of these loads. Add your comment on this item2

Identify and describe the various load conditions of timber posts and beams. Add your comment on this item3

Identify and describe how and why timber framed structures fail. Add your comment on this item4

 

LEARNING TASKS Add your comment on this item5

 

CONTENT Add your comment on this item6

1.     Loads that effect timber structures and their causes Add your comment on this item7

 

•         Live Loads (Occupants, Machinery, Vehicles, Snow, Wind, Rain, Earthquakes) Add your comment on this item8

•         Dead Loads (Materials, Fixtures & Fittings)  Add your comment on this item9

•         Wind Loads Add your comment on this item10

•         Earthquakes Add your comment on this item11

•         Hurricanes Add your comment on this item12

•         Resultant Loads Add your comment on this item13

•         Other factors (Impact, Fatigue, Fire, Decay, Etc) Add your comment on this item14

•         Harmonic Loads Add your comment on this item15

2.     Loads in posts and beams Add your comment on this item16

 

•         Uniform Load / Distributed Load Add your comment on this item17

•         Point Load Add your comment on this item18

•         Bending & Deflection Add your comment on this item19

•         Cantilevered Load (Including 1:2 Rule of Thumb) Add your comment on this item20

•         Effects of Green Timber & Shrinkage Add your comment on this item21

•         Braces in Tension & Compression (Knee Braces vs. Full-length Struts) Add your comment on this item22

3.     Causes of structural frame failure Add your comment on this item23

 

•         Fire Add your comment on this item24

•         Earthquakes Add your comment on this item25

•         Hurricanes Add your comment on this item26

•         Building Alterations Add your comment on this item27

•         Insect Attack & Decay Add your comment on this item28

•         Maintenance Issues Add your comment on this item29

•         Harmonics  Add your comment on this item30

•         Poor Design Choices (Hammer Beams, Etc) Add your comment on this item31

 

 

GOALS FOR SUCCESSFUL COMPLETION

 

Theory: Add your comment on this item32

 

i)                    Given a multiple choice test of 30 recall/recognition type questions about the mechanical properties of timber frames, the learner will answer all questions within 30 minutes and score a minimum of 70%, or 21 correct answers. Add your comment on this item33

 

ii)                   Given a complete set of drawings for a simple (3-4 bay) timber framed building, learners will identify the various types of loads that are likely to effect the design of the frame. Add your comment on this item34

 

iii)                 Given clear illustrations or photos of various common timber components, learners will correctly identify the following: Add your comment on this item35

a)            Whether timbers are acting in tension, compression, or a combination of tension and compression Add your comment on this item36

b)            Whether the timbers are subject to point loads or distributed loads Add your comment on this item37

c)            In which direction timbers are likely to deflect Add your comment on this item38

d)            Whether the timbers are cantilevered or simply-supported Add your comment on this item39

  Add your comment on this item40

 


PART EIGHT – TRADE SCIENCES

 

8B FORCES & STRESSES IN TIMBER FRAMES

 

DESCRIPTION Add your comment on this item41

 

Identify and describe the various forces and stresses that act upon a timber framed building and it’s individual timber components.  Add your comment on this item42

Identify tension joinery. Add your comment on this item43

 

LEARNING TASKS Add your comment on this item44

 

CONTENT Add your comment on this item45

1.      Identify forces and stresses  Add your comment on this item46

 

•         Compression Parallel to Grain Add your comment on this item47

•         Compression Perpendicular to Grain Add your comment on this item48

•         Tension Parallel to Grain Add your comment on this item49

•         Tension Perpendicular to Grain Add your comment on this item50

•         Vertical Shear Add your comment on this item51

•         Horizontal Shear Add your comment on this item52

•         Bending & Deflection Add your comment on this item53

•         Rotation Add your comment on this item54

•         Neutral Axis of Timbers Add your comment on this item55

•         Shear Planes  Add your comment on this item56

•         Load Path Add your comment on this item57

•         Load Diagrams Add your comment on this item58

•         Reaction Forces Add your comment on this item59

 

GOALS FOR SUCCESSFUL COMPLETION

 

Theory: Add your comment on this item60

 

i)                    Given a multiple choice test of 30 recall/recognition type questions about the forces and stresses that effect timber frames, the learner will answer all questions within 30 minutes and score a minimum of 70%, or 21 correct answers. Add your comment on this item61

 

ii)                   Given a complete set of frame drawings for a simple (2-3 bay) timber framed building, learners will correctly identify all locations of tension joinery. Add your comment on this item62

 

iii)                 Given clear line-drawings of various simple, common truss and frame types showing common load conditions, learners will correctly identify the following: Add your comment on this item63

a)                  Load paths  Add your comment on this item64

b)                  Which timbers are acting in compression, tension or a combination of tension and compression Add your comment on this item65

 


PART EIGHT – TRADE SCIENCES

 

8C PROPERTIES & REACTIONS OF WOOD

 

DESCRIPTION Add your comment on this item66

 

Identify and describe the parts and properties of hardwood and softwood. Add your comment on this item67

Describe the various types of shrinkage that effect timbers. Add your comment on this item68

Describe the effects of timber shrinkage on timber shapes and dimensions. Add your comment on this item69

Identify and describe the processes of rot, decay and insect attack in timber. Add your comment on this item70

 

LEARNING TASKS Add your comment on this item71

 

CONTENT Add your comment on this item72

1.      Parts and properties of trees and timbers  Add your comment on this item73

 

•         Softwood & Hardwood Add your comment on this item74

•         Photosynthesis Add your comment on this item75

•         Cell Structure Add your comment on this item76

•         Fibres & Vessels Add your comment on this item77

•         Chemical Content (Lignin, Cellulose, Hemicellulose, Ash & Extractives) Add your comment on this item78

•         Annual Rings Add your comment on this item79

•         Sapwood & Heartwood Add your comment on this item80

•         Spring Wood & Summer Wood Add your comment on this item81

•         Juvenile Wood Add your comment on this item82

•         Terminology (Pith, Juvenile Wood, Xylem, Rays, Cambium, Phloem & Outer Bark, Etc) Add your comment on this item83

•         Thermal Properties Add your comment on this item84

•         Strength Properties Add your comment on this item85

•         Hygroscopicity Add your comment on this item86

•         Acoustical Properties Add your comment on this item87

•         Resistance to Rot & Decay Add your comment on this item88

2.      Effects of shrinkage  Add your comment on this item89

 

•         Radial Shrinkage Add your comment on this item90

•         Tangential Shrinkage Add your comment on this item91

•         Longitudinal Shrinkage Add your comment on this item92

•         Shrinkage Values & Reference Tables Add your comment on this item93

•         Free Water & Bound Water Add your comment on this item94

•         Moisture Content (MC) & Specific Gravity Add your comment on this item95

•         Fibre Saturation Point (FSP) Add your comment on this item96

•         Equilibrium Moisture Content (EMC) Add your comment on this item97

•         Timber Sections & ‘Cuts’ of Timber Add your comment on this item98

•         Checking Add your comment on this item99

•         Drying & Seasoning Add your comment on this item100

3.      Rot, decay and insect attack Add your comment on this item101

 

•         Structural Polymers (Starch & Sugars) Add your comment on this item102

•         Moisture & Nitrogen Add your comment on this item103

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