[Gutenberg 12299] • The Mechanical Properties of Wood / Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing by Record, Samuel J. -- Read -- Imperial Library of Trantor

Index

THE MECHANICAL PROPERTIES OF WOOD THE MECHANICAL PROPERTIES OF WOOD

SAMUEL J. RECORD, M.A., M.F.

PREFACE CONTENTS PART I THE MECHANICAL PROPERTIES OF WOOD

INTRODUCTION FUNDAMENTAL CONSIDERATIONS AND DEFINITIONS TENSILE STRENGTH COMPRESSIVE OR CRUSHING STRENGTH SHEARING STRENGTH TRANSVERSE OR BENDING STRENGTH: BEAMS

Beams Stiffness of Beams Strength of Beams Kinds of Loads Application of Loads Failures in Timber Beams

TOUGHNESS: TORSION HARDNESS CLEAVABILITY

PART II FACTORS AFFECTING THE MECHANICAL PROPERTIES OF WOOD

INTRODUCTION RATE OF GROWTH HEARTWOOD AND SAPWOOD WEIGHT, DENSITY, AND SPECIFIC GRAVITY COLOR CROSS GRAIN KNOTS FROST SPLITS SHAKES, GALLS, PITCH POCKETS INSECT INJURIES37 MARINE WOOD-BORER INJURIES FUNGOUS INJURIES39 PARASITIC PLANT INJURIES.46 LOCALITY OF GROWTH SEASON OF CUTTING WATER CONTENT48 TEMPERATURE PRESERVATIVES

PART III TIMBER TESTING56

WORKING PLAN FORMS OF MATERIAL TESTED SIZE OF TEST SPECIMENS MOISTURE DETERMINATION MACHINE FOR STATIC TESTS SPEED OF TESTING MACHINE BENDING LARGE BEAMS BENDING SMALL BEAMS ENDWISE COMPRESSION COMPRESSION ACROSS THE GRAIN SHEAR ALONG THE GRAIN IMPACT TEST HARDNESS TEST: ABRASION AND INDENTATION CLEAVAGE TEST TENSION TEST PARALLEL TO THE GRAIN TENSION TEST AT RIGHT ANGLES TO THE GRAIN TORSION TEST64 SPECIAL TESTS

Spike-pulling Test Packing Boxes Vehicle and Implement Woods Cross-arms Other Tests

APPENDIX

SAMPLE WORKING PLAN OF THE U.S. FOREST SERVICE MECHANICAL PROPERTIES OF WOODS GROWN IN THE UNITED STATES

Working Plan No. 124 PURPOSE OF WORK MATERIAL DETAILED INSTRUCTIONS RECORDS PHOTOGRAPHS

SHRINKAGE AND SPECIFIC GRAVITY

Appendix to Working Plan 124 PURPOSE OF WORK MATERIAL RADIAL AND TANGENTIAL SHRINKAGE VOLUMETRIC SHRINKAGE AND SPECIFIC GRAVITY

STRENGTH VALUES FOR STRUCTURAL TIMBERS

(From Cir. 189, U.S. Forest Service)

BIBLIOGRAPHY

MISCELLANEOUS FOREST SERVICE REPORTS OF TESTS ON THE STRENGTH OF STRUCTURAL MATERIAL, MADE AT THE WATERTOWN ARSENAL, MASS.

INDEX FOOTNOTES