Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 | Page 5

elastic limit, in pounds per square
inch. C. Modulus of rupture, in pounds per square inch. D.
Longitudinal shear at maximum load, in pounds per square inch. E.
Modulus of elasticity, in thousands of pounds per square inch. F.
Percentage of moisture. G. Rings per inch. H. Weight per cubic foot,
oven dry, in pounds. I. Condition of seasoning.
===================================================
================= | A | B | C | D | E | F | G | H | I
--------+---+-----+-----+-------+-----+----+----+----+-------------- Average
| |3,580|5,480|364_{4}|1,780|23.2| 9.4|33.7| Air dry, Maximum | 4
|4,070|6,600|440 |1,987|24.3|11.5|34.5| 3-1/2 months Minimum |
|3,090|5,000|327 |1,530|21.5| 8.0|32.5| in the open.
--------+---+-----+-----+-------+-----+----+----+----+-------------- Average
| |4,512|5,060|338_{3}|1,685|20 | 7.7|33.9| Kiln dry, Maximum | 5
|5,840|7,320|488 |1,790|22 |10.2|38.0| 6 days. Minimum |
|3,180|2,150|143 |1,410|18 | 4.7|27.7|
--------+---+-----+-----+-------+-----+----+----+----+-------------- Average
| |4,331|6,721|493_{9}|1,688| -- | 7.7| -- | Air dry, 21 Maximum |12
|4,990|8,560|620 |2,002| -- | 9.5| -- | months under Minimum |
|3,110|5,160|380 |1,398| -- | 5.5| -- | shelter.
===================================================
=================
NOTE.--Figures written as subscripts to the figures for longitudinal
shear indicate the number of sticks failing in that manner.
[Illustration: PLATE II.--SIDE VIEWS OF TESTED TIMBERS.]
TABLE 4.--LOAD AND DEFLECTION LOG. BEAM I.
Columns in table:
A: Load, in pounds. B: Reading. C: Total deflection. D: Mean total
deflection.

Date: February 26th, 1909. Date: February 24th, 1909. l = 12 ft.; l = 12
ft.; b (mean) = 6-9/32 in.; b (mean) = 6 in.; h (mean) = 15-15/16 in.; h
(mean) = 15.69 in.; c = 7.97 in. c = 7.84 in. Time = 1 hour.
===================================================
====================== | P | DEFLECTION, IN INCHES. || P |
DEFLECTION, IN INCHES.
No.+------+----+----+----+----+-----++---------+----+----+----+----+----- |
A | B | C | B | C | D || A | B | C | B | C | D
---+------+----+----+----+----+-----++---------+----+----+----+----+----- 1 |
0 |1.86| 0 |1.88| 0 | 0 || 0 |1.83| 0 |1.86| 0 | 0 2 |
2,000|1.92|0.05|1.90|0.02|0.035|| 2,000 |1.87|0.04|1.90|0.04|0.04 3 |
4,000|1.96|0.10|1.94|0.06|0.080|| 4,000 |1.91|0.08|1.96|0.10|0.090 4 |
6,000|1.99|0.13|1.98|0.10|0.115|| 6,000 |1.96|0.13|2.00|0.14|0.135 5 |
8,000|2.03|0.17|2.02|0.14|0.155|| 8,000 |2.00|0.17|2.04|0.18|0.175 6
|10,000|2.05|0.19|2.06|0.18|0.185||10,000 |2.04|0.21|2.08|0.22|0.215 7
|12,000|2.10|0.24|2.09|0.21|0.225||12,000 |2.09|0.26|2.13|0.27|0.265 8
|14,000|2.13|0.27|2.13|0.25|0.260||14,000 |2.14|0.31|2.18|0.32|0.315 9
|16,000|2.17|0.31|2.16|0.28|0.295||16,000 |2.19|0.36|2.23|0.37|0.365 10
|18,000|2.20|0.34|2.20|0.32|0.330||18,000 |2.24|0.41|2.28|0.42|0.415 11
|20,000|2.24|0.36|2.25|0.37|0.365||20,000 |2.29|0.46|2.33|0.47|0.465 12
|22,000|2.28|0.42|2.28|0.40|0.410||22,000 |2.34|0.51|2.39|0.53|0.520 13
|24,000|2.32|0.46|2.32|0.44|0.450||24,000 |2.39|0.56|2.43|0.57|0.565 14
|26,000|2.36|0.50|2.36|0.48|0.490||26,000 |2.44|0.61|2.48|0.62|0.615 15
|28,000|2.40|0.54|2.39|0.51|0.525||28,000 |2.49|0.66|2.53|0.67|0.685 16
|30,000|2.43|0.57|2.44|0.56|0.565||30,000 |2.55|0.72|2.58|0.72|0.720 17
|32,000|2.48|0.62|2.48|0.60|0.610||32,000 |2.61|0.78|2.65|0.79|0.785 18
|34,000|2.52|0.68|2.53|0.65|0.655||34,000[B]|2.68|0.85|2.70|0.84|0.845
19 |36,000|2.56|0.70|2.56|0.68|0.690||36,000 |2.74|0.91|2.78|0.92|0.915
20 |38,000|2.61|0.75|2.62|0.74|0.745||38,000 | Broke. 21
|40,000|2.65|0.79|2.67|0.79|0.790|| 22 |42,000|2.70|0.84|2.73|0.85|0.845||
23 |44,000|2.75|0.89|2.77|0.89|0.890|| || 37,500 lb., First Crack; || 45,900
lb., Failed. || || At Elastic Limit: Load, 22,000 lb.; ||At Elastic Limit:
Load, 20,000 lb.; deflection, 0.41 in.; || deflection, 0.465 in.; S, 2,975 lb.
|| S, 2,975 lb. || Maximum: Load, 45,900 lb.; ||Maximum: Load, 38,000
lb.; deflection,.....; || deflection,.....; S, 6,209 lb. || S, 5,540 lb. || E =
1,575,000 lb. || E = 1,383,000 lb.

===================================================
======================
[Footnote B: First crack.]
TABLE 4.--(Continued.)--LOAD AND DEFLECTION LOG. BEAM
II.
Columns in table:
A: Load, in pounds. B: Reading. C: Total deflection. D: Mean total
deflection.
Date: February 20th, 1909. Date: -- l = 12 ft.; l = 12 ft.; b (mean) = 6.38
in.; b (mean) = 6.41 in.; h (mean) = 15.81 in.; h (mean) = 16.41 in.; c =
7.91 in. c = 8.20 in. Time = 47.5 min.
===================================================
====================== | P | DEFLECTION, IN INCHES. || P |
DEFLECTION, IN INCHES.
No.+------+----+----+----+----+-----++---------+----+----+----+----+----- |
A | B | C | B | C | D || A | B | C | B | C | D
---+------+----+----+----+----+-----++---------+----+----+----+----+----- 1 |
0 |1.65| 0 |1.68| 0 | 0 || 0 |1.86| 0 |1.87| 0 | 0 2 |
2,000|1.69|0.04|1.72|0.04|0.040|| 2,000 |1.91|0.05|1.92|0.05|0.05 3 |
4,000|1.73|0.08|1.77|0.09|0.085|| 4,000 |1.98|0.12|1.98|0.11|0.115 4 |
6,000|1.76|0.11|1.80|0.12|0.115|| 6,000 |2.05|0.19|2.02|0.15|0.170 5 |
8,000|1.80|0.15|1.83|0.15|0.150|| 8,000 |2.07|0.21|2.08|0.21|0.210 6
|10,000|1.83|0.18|1.86|0.18|0.180||10,000 |2.13|0.27|2.13|0.26|0.265 7
|12,000|1.87|0.22|1.90|0.22|0.220||12,000 |2.18|0.32|2.18|0.31|0.315 8
|14,000|1.91|0.26|1.94|0.26|0.260||14,000 |2.25|0.39|2.24|0.37|0.380 9
|16,000|1.95|0.30|1.98|0.30|0.300||16,000 |2.30|0.44|2.29|0.42|0.430 10
|18,000|1.98|0.33|2.02|0.34|0.335||18,000[C]|2.35|0.49|2.35|0.48|0.485
11 |20,000|2.03|0.38|2.06|0.38|0.380||20,000 |2.44|0.58|2.42|0.55|0.565
12 |22,000|2.07|0.42|2.10|0.42|0.420||22,000 |2.54|0.68|2.54|0.67|0.675
13 |24,000|2.11|0.46|2.14|0.46|0.460||25,040 | Failed 14
|26,000|2.15|0.50|2.18|0.50|0.500|| 15 |28,000|2.18|0.53|2.22|0.54|0.535||
16 |30,000|2.23|0.58|2.26|0.58|0.580|| 17

|32,000|2.27|0.62|2.30|0.62|0.620|| 18 |34,000|2.32|0.67|2.35|0.67|0.670||
19 |36,000|2.37|0.72|2.40|0.72|0.720|| 20
|38,000|2.42|0.77|2.45|0.77|0.770|| 21 |40,000|2.48|0.83|2.50|0.82|0.825||
22 |42,000|2.53|0.88|2.56|0.88|0.880|| 23 |43,450| Fracture. || 24 |45,710|
Failed. || || At Elastic Limit: Load, 20,000 lb.; ||At Elastic Limit: Load,
16,000 lb.; deflection, 0.38 in.; || deflection, 0.43 in.; S, 2,722 lb. || S,
1,999 lb. || Maximum: Load, 43,450 lb.; ||Maximum: Load, 25,040 lb.;
deflection,.....; || deflection,.....; S, 5,918 lb. || S, 3,130 lb. || E =
1,562,000 lb. || E = 979,000 lb.
===================================================
=======================
[Footnote C: First crack.]
TABLE 4.--(Continued.)--LOAD AND DEFLECTION LOG. BEAM
III.
Columns in table:
A: Load, in pounds. B: Reading. C: Total deflection. D: Mean total
deflection.
Date: February 13th, 1909. Date: -- l = 12 ft.; l = 12 ft.; b (mean) = 5.88
in.; b (mean) = 5.88 in.; h (mean) = 15.63 in.; h (mean) = 15.9 in.; c =
7.82 in. c = 7.95 in. Time = 45 min.
===================================================
====================== | P | DEFLECTION, IN INCHES. || P |
DEFLECTION, IN INCHES.
No.+------+----+----+----+----+-----++---------+----+----+----+----+----- |
A | B | C | B | C | D ||