MECHANICAL PROPERTIES. TABLE 73. — Conifers Grown in U. S. (Metric Units). 



Common and botanical 

 name. 



Specific 

 gravity, 

 oven-dry, 

 based on 



Static bending. 



Cedar, incense 



(Libocedrus dccurretts) 



Cedar, Port Orford 



(Chamaecyparis lawsoniana) 

 Cedar, western red 



(Thuja plicala) 

 Cedar, white 



{Thuja occidenlalis) 

 Cypress, bald 



{Taxodium distichum) 

 Fir, amabilis 



(Abies amabilis) 

 Fir, balsam 



(Abies balsamea) 

 Fir, Douglas (i) 



(Pseudotxuga taxifolia) 

 Fir, Doufjlas (2) 



(Pseudolsuga taxifolia) 

 Fir, grand. 



(Abies grandis) 

 Fir, noble 



(Abies nobilis) 

 Fir, white 



(Abies concoltr) 

 Hemlock, eastern 



(Tsuga canadensis) 

 Hemlock, western 



(Tsuga heterophylla) 

 Larch, westeva 



(Larix occidentalis) 

 Pine, Cuban 



(Pinus heterophylla) 

 Pine, loblolly 



(Pinus taeda) 

 Pine, lodgepole 



(Pinus contorla) 



Pine, Icingleaf 



(Pinus palustris) 

 Pine, Norway 



(Pinus resinosa) 

 Pine, pitch 



(Pinus rigida) 

 Pine, shortleaf 



(Pinus echinata) 

 Pine, sugar 



(Pinus lambertiana) 

 Pine, western white . . . 



(Pinus monticola) 

 Pine, western yellow.. . 



(Pinus ponderosa) 



Pine, white 



( Pinus strobus) 

 Sprjce, red 



(Ficea rubens) 

 Spruce, Sitka 



{Picea silchensis) 

 Tamarack 



(Larix laricina) 

 Yew, western 



(Taxu^ brcvifolia) 



vol. 

 when 

 green. 



0-3S 

 0.41 

 0-31 

 0.29 

 0.41 

 0-37 

 0.34 

 0.45 

 0.40 

 0.37 

 0.3s 

 0.35 

 0.38 

 0.38 

 0.48 

 0.5S 

 0.50 

 0.38 



vol. 

 oven- 

 dry. 



0.36 

 0.47 

 0.34 

 0.32 

 0.47 

 0.42 

 0.41 



O.S2 

 0.44 

 0.42 

 0.41 

 0.44 

 0.44 

 0.43 

 0.59 



0.68 

 0-59 

 0.44 



0.55 I 0.64 



0.44 

 0.47 

 0.50 

 0.36 

 0.39 

 0.38 



0.36 

 0.48 

 0.34 

 0.49 

 0.60 



o.Si 



O.S4 

 o.sS 

 0-39 



0-45 

 0.42 



0.39 

 0.41 

 0.37 

 0.56 

 0.67 



2.75 

 2.30 

 1. 8s 

 2. So 

 2-75 

 2. 10 

 3-50 

 2.5s 

 2 -SB 

 2.40 

 2.7s 

 2.9s 

 2.40 

 3-2S 

 3.9s 

 3- 10 

 2. 10 



3.8o 

 2.60 



2.6o 



3. IS 

 2.30 



2.4s 

 3.20 



2.40 

 2.40 

 2.10 

 2-95 

 4-SS 



2i M 



§■3 



4-33 

 4. So 

 3.63 

 2.9s 

 4.80 

 4-45 

 3-4S 

 5 -50 

 4-50 

 4-30 

 4.00 

 4.20 

 4.70 

 430 

 S-2S 

 6.20 

 5-30 

 3.85 



6. 10 



4- so 

 4.70 

 S.6S 

 3-75 

 4.00 

 3.6s 



3-7S 

 4.00 

 3.&S 

 S.os 

 7. 10 



a 



^1 



Impact bend- 

 ing. 



8 



590 

 IOS3 

 670 

 4S0 

 83s 

 91S 

 67s 

 mo 

 S30 

 91S 

 goo 

 793 

 790 

 833 

 9SO 

 iiSO 

 970 

 760 



1130 

 970 

 790 



1020 

 68s 

 93S 

 710 



7S0 

 830 

 830 

 87s 

 695 



9 



S.I5 

 6. S3 

 S-03 

 3-73 

 S-6o 

 3. 30 

 4-83 

 6.6o 

 6.40 

 S-70 

 S-33 

 5-03 

 S-53 

 5-So 

 6.6o 

 7.95 

 6. 70 

 S-03 



7.60 

 S-3S 

 6.40 

 7.90 

 4.70 

 3-33 

 4.70 



4.SS 

 S-OS 

 S.os 

 S-So 

 9. 20 



to rt 



10 



0.43 



0.64 



0.43 

 0.38 



0.61 



0.53 



0.41 

 0.63 

 0.31 

 0.56 

 0-Si 

 0.45 

 o. 31 

 0-3I 

 o.6i 

 0.94 

 o.Si 

 o-Si 



0.86 

 0.71 

 0.74 

 0.99 

 0.43 

 0.38 

 0.48 



0.46 

 0.46 

 0.74 

 0.71 

 0.97 



Compressioa 



Parallel 

 to grain. 



P- Ulti- 

 limit. I mate. 



kg/mm^ 



11 



2.00 

 2.10 

 1-7S 

 1. 00 

 2. 20 

 1.70 

 1-53 

 2.40 

 I. So 

 1.90 



1. 70 

 1.53 

 1.90 

 i.6o 

 2.30 

 2.80 



2. GO 

 1.30 



2.70 

 1.7s 



I -SO 

 2.30 

 1.6s 

 1-95 



I.4S 



1.6s 

 i.6s 

 1.60 



2.20 

 2.40 



12 



2. 20 

 2.30 

 2.00 

 1.40 

 2.43 

 2.00 

 1.70 

 2. So 

 2. 10 

 2. 10 



1. go 

 I.9S 

 2.30 

 2.03 



2. 70 

 3.IS 

 2.30 

 1.83 



3.10 



2. 20 

 2.13 

 2. 70 



1.83 



2. IS 



I.7S 



1.93 

 1.93 

 i.8s 

 2.4s 

 3-23 



111 

 g a 6JJ 



o to 



Shear 



IS 



0.32 

 0.27 

 0.22 

 0.20 

 0.33 

 o. 22 

 o.iS 

 0.37 

 0.32 

 o. 24 



O. 22 

 031 

 0.3s 

 0.25 

 0.39 

 0.41 

 0.39 

 0.22 



0.42 

 0.25 

 0.36 

 0.34 

 0.2s 

 0.2I 

 0.24 



0.22 

 0.23 

 0.23 

 0.34 

 0.73 



14 



0.38 

 0.62 

 0.31 

 0.44 

 0.33 

 0.47 

 0.43 

 0.64 

 0.62 

 0.53 

 0.49 

 0.51 

 0.63 

 0.37 

 0.63 

 0.72 

 0.63 

 0.49 



0.73 

 O.SS 

 0.67 

 0.63 

 0.50 

 0.50 



0.4s 

 0.54 

 O.SS 

 0.65 

 1.14 



Ten- 

 sion. 



•■3 =-« 

 Pi 



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

 Laboratory, Madison, Wisconsin. Bulletin 536 records results of tests on air-dry timber also, but only data on green timber are shown, 

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

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

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

 All test specimens were two inches square, by lengths as shown. 



Column Notes. — i. Locality where grown, — see Tables 74 and 73; 3, Moisture includes all matter volatile at 100° C expressed 

 as per cent of ordinary weight; 6, Weight, air dry is for wood with 12 per cent moisture; for density, see metric unit tables 72 and 

 73; 6-10, 762 mm (30 in.) long specimen on 711. 2 mm (28 in.) span, witli load at center, 



Smithsonian Tables. 



