Timber Frame Tension Joinery - Timber Frame Engineering Council

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Nomenclature and Glossary Special terms used in this report are defined below. Definitions are based on those given in (Macmillan, 1996), (Hewett, 1980), and (Hoadley, 1980), plus those offered by this researcher. 5% exclusion value the value at which 95% of the values in the series of tests will exceed allowable stress design a method of design that uses allowable stresses to determine allowable loads on members, etc. Note that the allowable stresses have built in factors of safety. balloon framing a method of wood construction that uses dimensional lumber spaced at regular intervals to create walls, floors, etc. confidence level an indicator of the reliability of the results in a small sample and how closely they would match the entire population correlation data acquisition system having a mutual relationship an electronic system that retrieves data about the item or material being tested and records the information for later analysis double shear dowel bearing strength a condition in which two shear planes exist on a single object the strength of a material being loaded by a circular prismatic object that is oriented perpendicular to its long axis edge distance the distance measured perpendicular to the grain, from the center of the dowel to the edge of the member being loaded viii
elasto-plastic behavior an ideal yield behavior that exhibits a perfectly linear elastic region on the stress-strain curve up to the yield stress and stays at that stress level as further strain occurs end distance the distance measured parallel to the grain, from the center of the dowel to the end of the member being loaded European Yield Model a model developed by European scientists that describes how a timber connection might fail in terms of various modes of failure F e variable representing the dowel bearing strength of a material F em the dowel bearing strength of the main member F es flexural yield strength fork and tongue connection the dowel bearing strength of the side member the yield strength in bending of a certain object or material a connection that contains a single, centered tongue that fits in a slot at the end of another member, commonly used at a roof peak, where rafters join end-to-end F v ⊥ the shear strength of the wood for loading perpendicular to the grain F v the shear strength of the wood for loading parallel to the grain F yb gravity loads the yield strength in bending of a dowel loads caused by gravity such as self weight and live loads ix
Page 1 and 2: TIMBER FRAME TENSION JOINERY Richar
Page 3 and 4: Acknowledgments Acknowledgments go
Page 5 and 6: 5.4 Dowel Bearing Test Results.....
Page 7 and 8: List of Figures Page Figure 1-1 Typ
Page 9: List of Appendices Page Appendix A
Page 13 and 14: normal distribution orthotropic mat
Page 15 and 16: xiii
Page 17 and 18: Tie Beam Figure 1-2 American Timber
Page 19 and 20: 2. Timber Framing Background 2.1 Hi
Page 21 and 22: territories. Using the new construc
Page 23 and 24: Although timber framing is still a
Page 25 and 26: 3. European Yield Model and Propose
Page 27 and 28: strength, then the dowel could bend
Page 29 and 30: P III s = k3 ⋅D⋅ts ⋅F ( 2 + R
Page 31 and 32: The areas under the shear diagram c
Page 33 and 34: and F es = 1728 psi) (see Sections
Page 35 and 36: Figure 3-7 Combined Shear - Bending
Page 37 and 38: 3.5 Additional Yield Model Equation
Page 39 and 40: need to know the required load and
Page 41 and 42: Using the equivalent bolt diameter,
Page 43 and 44: 4. Peg Testing Procedures and Analy
Page 45 and 46: dowel diameter and the intercept of
Page 47 and 48: were taken for two orientations (e.
Page 49 and 50: affected by the deformation in the
Page 51 and 52: Figure 4-6 Orientation of Prelimina
Page 53 and 54: The main purpose of the full-size t
Page 55 and 56: 5. Test Results 5.1 Introduction Th
Page 57 and 58: Table 5-1 Bending Test Correlation
Page 59 and 60: Table 5-4 Bending Yield Strength Re
Page 61 and 62:
5.3 Shear Test Results 181 shear te
Page 63 and 64:
0.90 0.90 Specific Gravity 0.80 0.7
Page 65 and 66:
Yield Stress τ (psi.) 3/4" Red Oak
Page 67 and 68:
5.4 Dowel Bearing Test Results The
Page 69 and 70:
obtained from shear tests at variou
Page 71 and 72:
To obtain allowable stress design v
Page 73 and 74:
l e l v Figure 6-1 Full-size Test D
Page 75 and 76:
each mode in the general yield mode
Page 77 and 78:
7. Conclusions and Recommendations
Page 79 and 80:
Appendix A Derivation of Dowel Rota
Page 81 and 82:
Appendix C NDS Yield Mode II, Alter
Page 83 and 84:
Appendix D NDS Mode III s , Alterna
Page 86 and 87:
Appendix E Standard Test Setup for
Page 88 and 89:
Appendix G Bending Test Data Summar
Page 90 and 91:
Summary of Bending Tests: Last Revi
Page 92 and 93:
Appendix H Shear Test Data Summary
Page 94 and 95:
Summary of 1-1/4" Red Oak Shear Tes
Page 96 and 97:
Summary of 1" White Oak Shear Tests
Page 98 and 99:
Appendix I Dowel Bearing Data Summa
Page 100 and 101:
Bibliography Abe M., and Kawaguchi,
Page 102:
Soltis, L. A.; Karnasudirdja, S.; L
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