TY - GEN AU - Kasal, Bohumil Ed. AU - Tannert, Thomas Ed. TI - In situ assessment of structural timber state of the art report of the RILEM technical committee 215-AST SN - 9789400796034 U1 - 691 PY - 2011/// PB - Springer N1 - Contents State-of-the-Art Report ix Preface xi List of Symbols and Abbreviations xiii List of Figures xv List of Tables xix Introduction 1 References 3 1 Stress Waves 5 Bohumjl Kasal, Gretchen Lear, and Thomas Tannert 1.1 Background 5 1.2 Equipment 7 1.2. 1 Sounding 7 1.2.2 Sonic Stress Waves 7 1.2.3 Ultrasonic Technique 10 1.2.4 Ultrasonic Echo Technique 11 1.3 Application 14 1.3.1 Defect and Deterioration Detection 14 1.3.2 Mechanical Properties 18 1.4 Limitations 19 1.4.1 Deterioration and Decay Detection 21 1.4.2 Mechanical Property Prediction 21 References 22 2 Ground Penetrating Radar 25 Mehdi Sbartai 2.1 Background 25 2.1.1 Dielectric Permittivity of Wood 27 2.2 Equipment 29 2.3 Applications 32 2.3.1 Detection 33 2.3.2 Moisture Evaluation 34 2.4 Limitations 35 References 36 3 Radiography 39 Bohumil Kasal, Gretchen Lear and Ron Anthony 3.1 Background 39 3.2 Equipment 40 3.2.1 Technology 40 3.2.2 Gamma Rays 41 3.2.3 X-Rays 41 3.2.4 Radiation Attenuation 42 3.2.5 Imaging 44 3.3 Application 47 3.4 Limitations 48 References 49 4 Resistance Drilling 51 Gretchen Lear, Bohumil Kasal and Ron Anthony 4.1 Background 51 4.2 Equipment 52 4.3 Application 53 4.4 Limitations 56 References 57 5 Core-Drilling 59 Bohumil Kasal 5.1 Background 59 5.2 Equipment 60 5.3 Application 61 5.4 Limitations 64 References 65 6 Shear Test of Glue Lines 67 Thomas Tannert 6.1 Background 67 6.2 Equipment 67 6.3 Application 69 6.3.1 Determination of Percentage Wood Failure 70 6.4 Limitations 70 References 72 7 Tension Micro-Specimens 75 Bohumil Kasal 7.1 Background 75 7.2 Equipment 76 7.3 Application 77 7.4 Limitations 78 References 80 8 Screw Resistance 81 Nobuyoshi Yamaguchi 8.1 Background 81 8.2 Equipment 82 8.3 Application 82 8.3.1 Strength Estimate from Screw Withdrawal Test 82 8.3.2 Strength Estimate from Screw Withdrawals and Velocity of Stress Wave 83 8.3.3 Screw Withdrawals and Angles of Entry 83 8.3.4 Screw Withdrawals and Compression Capacity 83 8.3.5 Densities from Screw Withdrawals 84 8.3.6 Stiffness Estimate from Screw Withdrawals and Velocity of Stress Wave 85 8.3.7 Summary 85 8.4 Limitations 85 References 86 9 Hardness Test 87 Mariapaola Riggio and Maurizio Piazza 9.1 Background 87 9.2 Equipment and Application 88 9.2.1 Janka Hardness Test 89 References 96 10 Moisture Measurement 99 Bohumil Kasal and Gretchen Lear 10.1 Background 99 10.2 Equipment 100 10.2.1 Pin Meters 100 10.2.2 Pin-less Meters 101 10.3 Application 102 10.4 Limitations 103 References 103 11 Species Identification 105 Nicola Macchioni 11.1 Equipment 105 11.1.1 Macroscopic Evaluation 106 11. 1.2 Microscopic Evaluations 106 11.2 Application 107 11 .3 Limitations 107 References 107 12 Dendrochronology 109 Olivia Pignatelli 12.1 Background 109 12.2 Equipment 110 12.3 Application 111 12.3.1 Wood Species Identification 111 12.4 Limitations 112 References 114 13 Review of Codes and Standards 115 Nicola Macchioni, Clara Bertolini and Thomas Tannert 13 .1 Codes and Standards 115 13.1 .1 International Standards 115 13.1.2 National Standards 116 13.2 Description of the Existing Conditions 118 13.2.1 Diagnosis of the Structural Elements 118 13.2.2 Objectives of the Inspection 119 13.2.3 Inspection Procedure 119 13.2.4 Inspection Report 120 References 120 Key Words Index 123 ER -