TM 55-607/NAVSEA OP 3221 Rev 2
Table B-3. Grouping of Species for Determining Allowable Loads for Nails and Screws
Specific
Group
Wood species
gravity (G)
I
Ash, commercial white ................................ ................................ ..............................
0.62
Beech ................................ ................................ ................................ .......................
0.68
Birch, sweet and yellow ................................ ................................ .............................
0.66
Hickory and pecan ................................ ................................ ................................ ....
0.75
Maple, black and sugar ................................ ................................ .............................
0.66
Oak, red and white ................................ ................................ ................................ ....
0.67
II
Douglas fir-larch ................................ ................................ ................................ ........
0.51
Southern pine ................................ ................................ ................................ ...........
0.55
Sweetgum and tupelo ................................ ................................ ...............................
0.54
III
Aspen, northern ................................ ................................ ................................ .........
0.42
California redwood (close grain) ................................ ................................ ................
0.42
Douglas fir south ................................ ................................ ................................ .......
0.48
Eastern hemlock, tamarack................................ ................................ ........................
0.45
Eastern spruce ................................ ................................ ................................ ..........
0.43
Hemlock, fir ................................ ................................ ................................ ..............
0.44
Idaho white pine ................................ ................................ ................................ ........
0.42
Lodgepole pine ................................ ................................ ................................ .........
0.44
Mountain hemlock ................................ ................................ ................................ .....
0.47
Northern pine ................................ ................................ ................................ ............
0.46
Ponderosa pine, sugar pine ................................ ................................ .......................
0.42
Red pine ................................ ................................ ................................ ...................
0.42
Sitka spruce ................................ ................................ ................................ ..............
0.43
Southern cypress ................................ ................................ ................................ ......
0.48
Spruce, pine, fir ................................ ................................ ................................ ........
0.42
Western hemlock ................................ ................................ ................................ ......
0.48
Yellow poplar ................................ ................................ ................................ ............
0.46
IV
Aspen ................................ ................................ ................................ .......................
0.40
Balsam fir ................................ ................................ ................................ .................
0 .38
California redwood (open grain)................................ ................................ .................
0.37
Coast sitka spruce and coast species ................................ ................................ ........
0.39
Cottonwood, black ................................ ................................ ................................ ....
0.33
Cottonwood, eastern ................................ ................................ ................................ .
0.41
Eastern white pine ................................ ................................ ................................ ....
0.38
Engelman spruce ................................ ................................ ................................ ......
0.37
Northern species ................................ ................................ ................................ .......
0.36
Northern white cedar ................................ ................................ ................................ .
0.31
Subalpine fir ................................ ................................ ................................ .............
0.34
Western cedars ................................ ................................ ................................ .........
0.36
Western white pine ................................ ................................ ................................ ...
0.40
Based on weight and volume when oven-dry.
B-4
