Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 | Page 2

of timbers the sap side must be turned up, and framing
or cutting of timbers shall not be permitted, if avoidable. All cut
surfaces of timbers shall be saturated with hot asphaltum, thinned with
creosote oil. The heads of piles when cut shall be promptly coated with
the hot asphaltum and oil, even though the cut-off be temporary.
METHOD OF TESTING.
The tests were made on a Riehlé 100,000-lb. machine in the
Experimental Engineering Laboratory of Tulane University of
Louisiana. The machine is provided with a cast-iron beam for
cross-bending tests. The distance between supports was 12 ft. The
method of support was as follows: Each end of the beam was provided
with a steel roller which rested on the cast-iron beam of the testing
machine, while above the roller, and, directly under the beam tested,
there was a steel plate 6 by 8 in. in area and 1 in. thick. The area was
sufficiently great to distribute the load and prevent the shearing of the
fibers of the wood. The head of the Riehlé machine is 10 in. wide. A
plate, 3/8 in. thick, 6 in. wide and 18 in. long, was placed between the
head of the machine and the beam tested.
[Illustration: FIG. 1.--DEFLECTON CURVES BEAM I]
[Illustration: FIG. 2.--DEFLECTON CURVES BEAM II]
TABLE 1.--SUMMARY OF RESULTS OF TRANSVERSE TESTS
OF BEAMS AT TULANE UNIVERSITY, FEBRUARY 10TH TO

MARCH 2D, 1909.
Columns in table:
1. Number of beam. 2. Top or butt of log. 3. Width, in inches. 4. Height,
in inches. 5. I = (bh^3)/12 6. Actual at elastic limit. 7. Maximum. 8. At
elastic limit. 9. Maximum. 10. At elastic limit. 11. E = (Pl^3)/(48dI) 12.
Weight, in pounds per cubic foot.
===================================================
========================+ | | b | h | I | LOADS: |S = (Plc)/(4I) |
d, | | | | | | | |INCHES.| |
|------+-------+-------+-----------------+---------------+-------+ 1 | 2 | 3 | 4 | 5
| 6 | 7 | 8 | 9 | 10 |
------+---+------+-------+-------+--------+--------+-------+-------+-------+ I |
B | 6.28 | 15.94 | 2,120 | 22,000 | 45,900 | 2,975 | 6,200 | 0.41 | I | T |
6.00 | 15.69 | 1,934 | 20,000 | 38,000 | 2,915 | 5,540 | 0.465 | | | | | | | | | | |
II[A]| T | 6.37 | 15.81 | 2,098 | 20,000 | 43,450 | 2,722 | 5,918 | 0.380 | II
| B | 6.41 | 16.41 | 2,360 | 16,000 | 25,040 | 1,999 | 3,130 | 0.430 | | | | | | |
| | | | III | T | 5.88 | 15.68 | 1,871 | 24,000 | 45,130 | 3,608 | 6,785 | 0.535 |
III | B | 5.88 | 15.90 | 1,965 | 21,000 | 35,190 | 3,054 | 5,120 | 0.515 | | | | |
| | | | | | IV | T | 6.00 | 15.43 | 1,835 | 22,000 | 38,425 | 3,320 | 5,810 |
0.465 | IV | B | 6.12 | 15.87 | 2,032 | 22,000 | 35,500 | 3,090 | 4,983 |
0.660 | | | | | | | | | | | V | B | 6.00 | 16.00 | 2,048 | 22,000 | 47,000 | 3,090 |
6,610 | 0.400 | V[A]| T | 6.00 | 15.87 | 1,999 | 14,000 | 22,050 | 1,998 |
3,145 | 0.315 | | | | | | | | | | | VI[A]| B | 5.50 | 15.75 | 1,790 | 22,000 |
51,330 | 3,484 | 8,925 | 0.450 | VI[A]| T | 5.87 | 15.62 | 1,865 | 20,000 |
44,000 | 3,013 | 6,627 | 0.410 | | | | | | | | | | | VII | B | 6.56 | 15.62 | 2,083 |
34,000 | 51,900 | 4,580 | 6,985 | 0.620 | VII[A]| T | 6.22 | 15.62 | 1,975 |
20,000 | 49,000 | 2,845 | 6,970 | 0.380 |
===================================================
========================+
[Footnote A: Failed in longitudinal shear.]
============================================== E | | | |
-----------+ | 11 | 12 | Remarks. -----------+------+---------------------------
1,575,000 | 50.2 | } Close-grained pine, 1,383,000 | 47.5 | } long-leaf. | |

1,562,000 | 40.5 | } Coarse loblolly, 979,000 | 42.2 | } large knots. | |
1,489,000 | 40.4 | } Close-grained, long-leaf 1,288,000 | 44.2 | } no
knots. | | 1,601,000 | 40.8 | } Loblolly, with 1,017,000 | 41.5 | } knots. | |
1,670,000 | 47.2 | } Long-leaf yellow 1,382,000 | 42.1 | } pine. | |
1,695,000 | 50.2 | } Long-leaf yellow 1,625,000 | 45.2 | } pine. | |
1,637,000 | 43.7 | } Long-leaf yellow 1,658,000 | 40.2 | } pine.
==============================================
The deflection was measured on both sides