a Results of tests on small clear specimens in the green and air-dried conditions. Definition of properties; impact bending is height of drop that causes complete failure, using 0.71-kg (50-lb) hammer; compression parallel to grain is also called maximum crushing strength; compression perpendicular to grain is fiber stress at proportional limit; shear is maximum shearing strength; tension is maximum tensile strength; and side hardness is hardness measured when load is perpendicular to grain.
Alder Green - 12%0.37-0.416,500-9,800 1.17-1.388.0-8.422-202,960-5,820250-440770-1,080390-420440-590Ash Green - 12%0.45-0.606,000-15,000 1.04-1.7411.8-16.6—-432,300-7,410350-1,420860-2,030—-940—-1,320Aspen Green - 12%0.35-0.395,100-9,1000.86-1.43 5.7-7.7—-222,140-5,300180-450660-1,080—-260—-350Basswood Green - 12%0.32-0.375,000-8,700 1.04-1.46 5.3-7.2162,220-4,730170-370600-990280-350250-410Birch Green - 12%0.48-0.656,400-16,900 1.17-2.1715.7-20.829-333,540-7,110360-6901,130-1,700560-570660-950Cherry Green - 12%0.47-0.508,000-12,300 1.31-1.4911.4-12.834-552,360-8,540270-1,080840-2,240—-950560-1,470Cottonwood Green - 12%0.31-0.403,900-8,5000.75-1.37 4.2-7.4—-221,690-4,910140-380500-1,040—-580—-430Cypress Green - 12%0.42-0.466,600-10,600 1.18-1.44 6.6-8.224-253,580-6,360400-730810-1,000270-300390-510Elm Green - 12%0.46-0.637,200-14,800 1.11-1.5411.8-19.838-562,910-7,050360-1,2301,000-1,920—-660620-1,320Gum
Green - 12%0.46-0.527,100-12,500 1.20-1.6410.1-11.932-363,040-6,320370-620990-1,600540-760600-850Hackberry Green - 12%0.49-0.536,500-11,0000.95-1.1912.8-14.543-482,650-5,440400-8901,070-1,590580-630700-880Hickory/Pecan Green - 12%0.56-0.759,100-20,200 1.29-2.2613.8-31.7—-1043,920-9,210760-1,980—-2,430—-680—-1,820Hard Maple
Green - 12%0.52-0.637,900-15,800 1.33-1.8312.5-16.539-483,270-7,830600-1,4701,130-2,330—-720840-1,450Pacific Coast Maple Green - 12%0.44-0.487,400-10,700 1.10-1.457.8-8.723-283,240-5,950450-7501,110-1,730540-600620-850Soft Maple Green - 12%0.44-0.545,800-13,4000.94-1.647.8-12.523-322,490-6,540370-1,0001,050-1,850—-600590-950Red Oak Green - 12%0.52-0.697,400-18,100 1.14-2.288.0-21.526-543,000-8,740550-1,250930-2,080—-1,050860-1,510White Oak Green - 12%0.57-0.887,200-18,4000.88-2.059.4-19.2—-503,290-8,900530-2,8401,210-2,660—-940—-1,620Poplar Green - 12%0.40-0.426,000-10,100 1.22-1.587.5-8.824-262,660-5,540270-500790-1,190510-540440-540Sycamore Green - 12%0.46-0.496,500-10,000 1.06-1.427.5-8.5262,920-5,380360-7001,000-1,470630-720610-770Walnut Green - 12%0.51-0.559,500-14,600 1.42-1.6810.7-14.634-374,300-7,580490-1,0101,220-1,370570-690900-1,010
STATIC BENDING
COMMON
MOISTURE SPECIFIC MODULUS OF MODULUS OF WORK TO IMPACT COMPRESSION COMPRESSION SHEAR TENSION SIDE SPECIES NAMES
CONTENT
GRAVITY (b)
RUPTURE ELASTICITY (c)MAXIMUM BENDING PARALLEL PERPENDICULAR PARALLEL PERPENDICULAR HARDNESS LOAD TO GRAIN TO GRAIN TO GRAIN TO GRAIN TO GRAIN (lbf/in 2)
(106lbf/in 2)
(in-lbf/in 3)(in.)(lbf/in 2)(lbf/in 2)(lbf/in 2)(lbf/in 2)
(lbf)
Strength and Mechanical Properties (inch - pound)
a
b Specifi
c gravity is base
d on weight when ovendry and volum
e when green or at 12%moisture content
c Modulus of elasticity measure
d from a simply supported, center-loaded beam, on a span depth ratio of 14/1. T o correct for shear deflection, th
e modulus can be increased by 10%.
Source:Wood Handbook, Wood as an Engineering Material,USDA Forest Service。