Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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80
Lag Screw,
Species and Specific Gravity of Wood
Side Member
Thickness,
in.
unthreaded
Shank
diameter,
in.
Southern Pine
S.G. = 0.55
Lateral Value, lb
// s^ m^
Douglas Fir-Larch
S.G. = 0.50
Lateral Value, lb
// s^ m^
Hem-Fir
S.G. = 0.43
Lateral Value lb,
// s^ m^
¾ ¼ 150 110 120 140 100 110 130 90 100
5
⁄16 180 120 130 170 110 120 150 100 110
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3
⁄8 180 120 130 170 110 120 150 100 110
1 ¼ 160 120 120 150 120 120 140 100 110
5
⁄16 210 140 150 190 130 140 170 110 130
³⁄8 210 130 150 200 120 140 170 100 120
1½ ¼ 160 120 120 150 120 120 140 110 110
5
⁄16 210 150 150 200 140 140 180 130 130
³⁄8 210 150 150 200 140 140 190 130 130
7
⁄ 16 320 220 230 310 200 210 290 170 190
½ 410 250 290 390 220 270 350 190 240
5
⁄8 600 340 420 560 310 380 500 280 340
¾ 830 470 560 770 440 510 700 360 450
7
⁄ 8 1,080 560 710 1,020 490 660 930 390 580
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