Maple, red | 297 | 330 |
| sugar | 376 | 513 |
| Oak, post | 354 | 487 |
| red | 380 | 470 |
| swamp white | 428 | 536 |
| white | 382 | 457 |
| yellow | 379 | 470 |
| Sycamore | 265 | 425 |
| Tupelo | 277 | 380 |
| | | |
| Conifers | | |
| | | |
| Arborvitae | 148 | 139 |
| Cypress, bald | 167 | 154 |
| Fir, alpine | 130 | 133 |
| Douglas | 139 | 127 |
| white | 145 | 187 |
| Hemlock | 168 | 151 |
| Pine, lodgepole | 142 | 140 |
| longleaf | 187 | 180 |
| red | 161 | 154 |
| sugar | 168 | 189 |
| western yellow | 162 | 187 |
| white | 144 | 160 |
| Spruce, Engelmann | 110 | 135 |
| Tamarack | 167 | 159 |
|---------------------------------------------|

PART II FACTORS AFFECTING THE MECHANICAL PROPERTIES OF WOOD

INTRODUCTION

Wood is an organic product--a structure of infinite variation of
detail and design.[17] It is on this account that no two woods
are alike--in reality no two specimens from the same log are
identical. There are certain properties that characterize each
species, but they are subject to considerable variation. Oak,
for example, is considered hard, heavy, and strong, but some
pieces, even of the same species of oak, are much harder,
heavier, and stronger than others. With hickory are associated
the properties of great strength, toughness, and resilience, but
some pieces are comparatively weak and brash and ill-suited for
the exacting demands for which good hickory is peculiarly
adapted.

[Footnote 17: For details regarding the structure of wood see
Record, Samuel J.: Identification of the economic woods of the
United States. New York, John Wiley & Sons, 1912.]

It follows that no definite value can be assigned to the
properties of any wood and that tables giving average results of
tests may not be directly applicable to any individual stick.
With suff