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The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing — John Shaqi

The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber TestingRecord, Samuel J. (Samuel James)

Science

The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing

Name: The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing
Author: Record, Samuel J. (Samuel James)

Record, Samuel J. (Samuel James)

Wood; Wood -- Testing

|-----------------------------------------------------------|
|                         TABLE XI                          |
|-----------------------------------------------------------|
|          MANNER OF FIRST FAILURE OF LARGE BEAMS           |
|             (Forest Service Bul. 108, p. 56)              |
|-----------------------------------------------------------|
|                  | Total  | Per cent of total failing by  |
|   COMMON NAME    | number |---------+-------------+-------|
|   OF SPECIES     | of     | Tension | Compression | Shear |
|                  | tests  |         |             |       |
|------------------+--------+---------+-------------+-------|
| Longleaf pine:   |        |         |             |       |
|   green          |    17  |    18   |      24     |   58  |
|   dry            |     9  |    22   |      22     |   56  |
| Douglas fir:     |        |         |             |       |
|   green          |   191  |    27   |      72     |    1  |
|   dry            |    91  |    19   |      76     |    5  |
| Shortleaf pine:  |        |         |             |       |
|   green          |    48  |    27   |      56     |   17  |
|   dry            |    13  |    54   |             |   46  |
| Western larch:   |        |         |             |       |
|   green          |    62  |    23   |      71     |    6  |
|   dry            |    52  |    54   |      19     |   27  |
| Loblolly pine:   |        |         |             |       |
|   green          |   111  |    40   |      53     |    7  |
|   dry            |    25  |    60   |      12     |   28  |
| Tamarack:        |        |         |             |       |
|   green          |    30  |    37   |      53     |   10  |
|   dry            |     9  |    45   |      22     |   33  |
| Western hemlock: |        |         |             |       |
|   green          |    39  |    21   |      74     |    5  |
|   dry            |    44  |    11   |      66     |   23  |
| Redwood:         |        |         |             |       |
|   green          |    28  |    43   |      50     |    7  |
|   dry            |    12  |    83   |      17     |       |
| Norway pine:     |        |         |             |       |
|   green          |    49  |    18   |      76     |    6  |
|   dry            |    10  |    30   |      60     |   10  |
|-----------------------------------------------------------|
| NOTE.--These tests were made on timbers ranging in cross  |
| section from 4" x 10" to 8" x 16", and with a span of 15  |
| feet.                                                     |
|-----------------------------------------------------------|



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The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing

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