TABLE 77. — Mechanical Properties of Conifers Grown in U. S. (Metric Units) 



133 



mon and botanical 

 name. 



Specific 

 gravity, 

 oven-dry, 

 based on 



incense 



Kedrus decurrens) 



Port Orford,. 



aecy par is lawsoniana) 



western red 



ija plicata) 



white 



tja occidentalis) 



•s, bald 



■.odium distichum) 



labilis 



es amabilis) 



lsam 



!s balsamea) 

 >uglas (1) ...... . 



udotsuga taxijolia) 



juglas (2) 



udotsuga taxijolia) 



ind 



es grandis) 



He....... 



es nobilis) 



lite 



es concolor) 



ck, eastern 



ga canadensis) 



ck, western 



ga heterophylla) 



western 



ix occidentalis) 



luban 



us heterophylla) 



jblolly 



ustaeda) 



jdgepole 



us contorta) 



mgleaf 



us palustris) 



Jorway 



us resinosa) 



litch 



us rigida) 



hortleaf 



us echinata) 



ugar _ 



us lambertiana) 

 western white . . . 

 us monticola) 

 western yellow . . . 

 us ponderosa) 



rhite 



us strobus) 



, red 



'.a rubens) 



•„ Sitka 



ea sitchensis) 



ack 



ix laricina) 



western 



:us brevifolia) 



vol. 

 when 

 green . 



o-35 

 0.41 

 0.31 

 o. 29 

 0.41 

 °-37 

 o.34 

 0-45 

 0.40 



0.38 

 0.48 

 0.58 

 0.50 

 0.38 



vol. 

 oven- 

 dry. 



0.36 



0.47 

 0.34 

 0.32 

 0.47 

 0.42 

 0.41 

 0.52 

 044 

 0.42 

 0.41 

 0.44 

 0.44 

 0.43 

 0.59 

 0.6S 

 0.50 

 0.44 



o.55 I °°4 



O.44 



0.47 

 O.50 

 O.36 



0.39 

 0.38 



0.36 



0.48 

 0.34 

 0.49 

 0.60 



0.51 



0.54 

 0.58 

 0.39 

 0.45 

 0.42 



0.39 

 0.41 



°-37 

 0.56 

 0.67 



Static bending. 



6 



2-75 

 2.75 

 2.30 

 1.85 

 2.80 

 275 

 2. 10 

 3 -$o 

 2. ss 



2.5s 



2.40 



2.7s 

 2.9s 



2.40 

 3-25 

 3 95 

 310 

 2. 10 



3-8o 

 2.60 

 2.60 

 3- IS 

 2.30 

 2-45 

 3- 20 



2.40 

 2.40 

 2.10 

 2.95 

 4-55 



*o E 



3, -a 

 3 . 



4-35 

 4.80 

 3.65 

 2-95 

 4.80 

 4-45 

 3-45 

 550 

 4-5° 

 4-30 

 4.00 

 4. 20 

 4.70 

 4-30 

 5-25 

 6. 20 

 5.30 

 3.85 



6. 10 

 4- SO 

 4.70 



5.65 

 3-75 

 4.00 

 3.65 



3-75 

 4.00 

 3.8s 

 S-03 

 7. 10 



E 



8 



590 



1055 

 670 

 45o 

 83S 

 915 

 67S 



1 1 10 

 830 

 915 

 900 

 795 

 790 

 835 

 950 



1 1 S° 

 970 

 760 



1150 



970 

 790 

 1020 

 685 

 935 

 710 



750 

 830 

 830 

 875 

 69S 



Impact bend- 

 ing. 



5- IS 

 6.55 

 5 



3-75 

 S-6o 

 5-5o 

 85 

 60 

 40 

 70 

 SS 

 OS 

 5S 

 50 

 60 

 95 

 70 

 OS 



60 

 35 



40 

 90 

 70 

 3S 

 70 



55 

 5-oS 

 5-oS 

 5-5o 

 9 



10 



o.43 



0.64 

 o.43 

 0.38 

 o. 61 

 o-S3 

 0.41 

 0.63 

 0.51 

 0.56 

 0.51 

 0.46 

 0.51 

 0.51 

 o. 61 

 0.94 

 0.81 

 0.51 



0.86 

 o. 71 



0.74 

 0.99 

 0.43 

 0.58 

 0.4S 



0.46 

 0.46 



0.74 



o. 71 

 o.97 



Compression. 



Parallel 

 to grain. 



P- I Ulti- 

 limit. mate. 



kg/mm 2 



11 



2.00 

 2.10 

 1-75 

 1 .00 

 2. 20 

 1.70 

 1-55 

 2.40 

 1.80 

 1 .90 

 1.70 

 1.85 

 1 .90 

 1 .60 

 2.30 

 2.80 

 2.00 

 1 -SO 



2.70 

 1-75 

 1 So 

 2.50 

 1.65 

 1.95 

 1-45 



IDS 

 1.65 

 1.60 

 2.20 

 2.40 



12 



2. 20 

 2.30 

 2.00 

 1.40 

 2.45 

 2.00 



1. 70 

 2.83 

 2. 10 



2 . 10 

 1.90 

 1-95 

 2.30 

 2.05 

 2. 70 

 3-iS 

 2. so 

 1. 85 



3-io 

 2. 20 

 2. IS 

 2. 70 

 1. 8s 

 2. IS 

 1-75 



1.90 

 1.95 



1.85 

 2.45 

 3-2S 



Shear. 



'■aft. 



S.sif 



fi- 



ts 



0.32 

 0.27 

 0.22 

 0.20 

 0.33 

 o. 22 

 0.15 

 037 

 0.32 

 o. 24 



O. 22 

 0.3I 

 0-35 

 0.2S 

 0.39 

 O.4I 

 0.39 

 O. 22 



O.42 

 0.2S 

 O.36 

 0.34 

 O.25 

 O. 21 

 O.24 



0.22 

 O.25 

 O.23 

 0.34 

 0.73 



2 s 

 to E 



ft. 3 



14 



0.58 

 0.62 

 0.51 

 0.44 

 0.5S 

 0.47 

 0.43 

 0.64 

 0.62 

 o.53 

 0.49 

 0.51 

 0.62 

 o.57 

 0.6s 

 0.72 

 0.63 

 049 



o.75 

 o.55 

 0.67 

 0.63 

 0.50 

 0.50 

 0.48 



0.45 

 o.54 

 o.55 

 0.66 

 1. 14 



Ten- 

 sion. 



u 22 



3 E 

 ft. 



15 



o. 20 



0.17 

 0.15 

 0.17 



o. 20 



0.17 

 0.23 

 o. 14 



0.25 



o. 16 



0.13 



0.1S 

 0.1S 

 0.18 

 0.16 

 0.20 

 0.20 

 0.15 



o. 20 



0.13 

 0.2s 

 0.23 

 o. 19 



0.18 



O. 20 



O.lS 

 O.I3 

 O.16 

 O.lS 

 O.32 



otf. — The data above are extracted from tests on one hundred and twenty-six species of wood made at the Forest Products 

 >ry . Madison, Wisconsin. Bulletin 556 records results of tests on air-dry timber also, but only data on green timber are shown, 

 tter are based on a larger number of tests and on tests which are not influenced by variations in moisture content. The 

 of dry material usually exceeds that of green material, but allowable working stresses in design should be bas.d on strengths 

 timber, inasmuch as the increase of strength due to drying is a variable, uncertain factor and likely to be ollset by defects, 

 specimens were two inches square, by lengths as shown. 



Column Notes. — 2, Locality where grown, — see Tables 78 and 79 j 3, Moisture includes all matter volatile 

 C expressed as per cent of ordinary weight; 5, Weight, air-dry is for wood with 12 per cent moisture; 

 sity, see metric unit tables 76 and 77; 6-10, 762 mm (30 in.) long specimen on 711. 2 mm (28 in.) span, with 

 center. 



onian Tables. 



