------------------------------------|
| RESULTS OF IMPACT BENDING TESTS ON SMALL CLEAR BEAMS |
| OF 34 WOODS IN GREEN CONDITION |
| (Forest Service Cir. 213) |
|-------------------------------------------------------|
| | Fibre | | Work in |
| COMMON NAME | stress at | Modulus of | bending |
| OF SPECIES | elastic | elasticity | to |
| | limit | | elastic |
| | | | limit |
|-------------------+-----------+------------+----------|
| | | | In.-lbs. |
| | Lbs. per | Lbs. per | per cu. |
| | sq. in. | sq. in. | inch |
| | | | |
| Hardwoods | | | |
| | | | |
| Ash, black | 7,840 | 955,000 | 3.69 |
| white | 11,710 | 1,564,000 | 4.93 |
| Basswood | 5,480 | 917,000 | 1.84 |
| Beech | 11,760 | 1,501,000 | 5.10 |
| Birch, yellow | 11,080 | 1,812,000 | 3.79 |
| Elm, rock | 12,090 | 1,367,000 | 6.52 |
| slippery | 11,700 | 1,569,000 | 4.86 |
| white | 9,910 | 1,138,000 | 4.82 |
| Hackberry | 10,420 | 1,398,000 | 4.48 |
| Locust, honey | 13,460 | 2,114,000 | 4.76 |
| Maple, red | 11,670 | 1,411,000 | 5.45 |
| sugar | 11,680 | 1,680,000 | 4.55 |
| Oak, post | 11,260 | 1,596,000 | 4.41 |
| red | 10,580 | 1,506,000 | 4.16 |
| swamp white | 13,280 | 2,048,000 | 4.79 |
| white | 9,860 | 1,414,000 | 3.84 |
| yellow | 10,840 | 1,479,000 | 4.44 |
| Osage orange | 15,520 | 1,498,000 | 8.92 |
| Sycamore | 8,180 | 1,165,000 | 3.22 |
| Tupelo | 7,650 | 1,310,000 | 2.49 |
| | | | |
| Conifers | | | |
| | | | |
| Arborvitae | 5,290 | 778,000 | 2.04 |
| Cypress, bald | 8,290 | 1,431,000 | 2.71 |
| Fir, alpine | 5,280 | 980,