Timber physics by Roth Filibert 1858-

Author:Roth, Filibert, 1858- [from old catalog]
Language: eng
Format: epub, pdf
Tags: Wood, Strength of materials
Publisher: Washington, Govt. print. off.
Published: 1899-03-25T05:00:00+00:00

TIMBER PHYSICS STRENGTH AND WEIGHT.

367

Reaidls of testa in hcndiny, at relatiw elastic limit. [Pounds per square inch.]

No

Species.

Reduced to 15 per cent moisture.

Longleaf pino

Ouban pine

Sbortleaf pine

Loblolly pine

Jieduced to 12 per cent moisture.

White pine

Ited pine

Spruce pine

li;ild cypress

White cedar

l>ou;L;las sjirucetr

White oak

Overcu}! oak

Post oak

Cow oak

Ked oak

Texan oak

Yellow oak

Water oak

Willow oak

Spanish oak

Sbagbark hickory

Mi>ckernut hickory

Water hickory

Bitternut hickory

^Nutniej; hickory".

Pecan hickory

Pignut hickory

White elm

Cedar elm

White ash . ^

Green ash

Sweet gum ,

Number of tests.

1,100 a9o

■SM 650

i:iO

9.5 170 055

87

41 •JIS •_'!«

4!) •J5li

57 117

40

:n

153

257

187

75

14

25

72

37

30

18

44

87

10

118

Highest single test.

13,500 12, '.too 11,900 12,700

10, 000 11,300 13,700 12, 000

8,200 13,700

15, 700 11,000 lO.liOO

14, 2U0 14,500

12, UOO

11, 800 11, 800

13, 100

13, 500

16, 100

15, 400 11,900

14, 300 12,200 15,1100 17,500

9,700 10,700 11, 500 13, 200 11,000

Lowest aiugle test.

2, 400 2, 200 2,900 3,100

4,100 3,100 3,000 2,200 3.400 2,800 4,400 4,000 5,100 3.400 5, 100 5,900 4, 900 4,500 2, 700 5,100 5,400 4,300 4,100 7,500

4, 200 5,800 7,400

5, 300 4, 700 3,600 3,200 3,500

Average of highest 10 per cent of tests.

11,100 11,500 9,700 10,800

8.200 10,300 11.200 9, 900 7, 390 9, 600 14, 100 9,500 9,600 11, 600

13, COO 11,400 11,100 11, 400 10,000 11,600 14,200

14, 600 11,800 14, 000 11,200 14,400 16 400

9, 600 10,100 10,400 13, 200 10,100

Average

of lowest

10 per

c.ent of

tests.

5,400 5,600 4, 800 5,400

4,500 4,500 5, 000

4, 200 4,000 3, 400 0,100 5,400 6,000

5, 000 5,600 7,800 5,100 5,500 4,300

6, 600 7,700 7,800 4,800 7,600 6,400 7,900 8, 300 5,400 5,800 5,200 3,200 5,100

Average of all tests.

8, 500 9,500 7,200 8,200

6,400 7,700 8.400 6, BOO 5,800

6, 400 9,000

7, 500 8,400 7,600 9, 200 9,400 8,100 8,800 7,400 8,600

11,200 11,700 9,800 11,100 9,300 11,.500 12,600 7, 300 8,000 7,900 8,900 7,800

Proportion of tests

within 10 per cent of

average.

Proportion of testa

within 25 per cent of

average.

Per cent. 43 42 48 46

Tcr cent.

81 83 81 85

Alodulua of elasticity (average of all tests).

1, 890, 000

2, 300, 000 I, 600, 000 1, 950, 000

300, 000 620, 000 640, 000 290, 000 910,000 6K0, 000 090, 000 620, 000 030, 000 610,000 970, 000 860, 000 740, 000 000, 000 750, 000 930, 000 390, 000 320,000 080, 000 280, 000 940, 000 530, 900 730, 000 540,000 700, 000 640,000 050,000 TOO, 000

a Actual tests on " dry " material not reduced for moisture.

/siipao

//,000

i moo

9000

'i. 8000

17000

6000

SOOO

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