Book-bot.com - The Mechanical Properties of Wood - Including a Discussion of the Factors Affecting the Mechanical - Properties, and Methods of Timber Testing by Record, Samuel J.

The Mechanical Properties of Wood - Including a Discussion of the Factors Affecting the Mechanical - Properties, and Methods of Timber Testing by Samuel J. Record
page 20 of 237 (08%)

|------------------------------------------------------------------------------|
| TABLE I |
|------------------------------------------------------------------------------|
| COMPARATIVE STRENGTH OF IRON, STEEL, AND WOOD |
|------------------------------------------------------------------------------|
| | Sp. | Modulus of | Tensile | Crushing | Modulus |
| MATERIAL | gr., | elasticity | strength | strength | of |
| | dry | in bending | | | rupture |
|-------------------------+----- +------------+----------+----------+----------|
| | | Lbs. per | Lbs. per | Lbs. per | Lbs. per |
| | | sq. in. | sq. in. | sq. in. | sq. in. |
| | | | | | |
| Cast iron, cold blast | | | | | |
| (Hodgkinson) | 7.1 | 17,270,000 | 16,700 | 106,000 | 38,500 |
| Bessenger steel, | | | | | |
| high grade (Fairbain) | 7.8 | 29,215,000 | 88,400 | 225,600 | |
| Longleaf pine, | | | | | |
| 3.5% moisture (U.S.) | .63 | 2,800,000 | | 13,000 | 21,000 |
| Redspruce, | | | | | |
| 3.5% moisture (U.S.) | .41 | 1,800,000 | | 8,800 | 14,500 |
| Pignut hickory, | | | | | |
| 3.5% moisture (U.S.) | .86 | 2,370,000 | | 11,130 | 24,000 |
|------------------------------------------------------------------------------|
| NOTE.--Great variation may be found in different samples of metals as well |
| as of wood. The examples given represent reasonable values. |
|------------------------------------------------------------------------------|

TENSILE STRENGTH