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

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Reference Design Values for Southern Pine, lb per sq in.
Extreme Shear Compression Compression Modulus of Elasticity
Fiber in Parallel to Perpendicular Parallel to
Bending Grain to Grain Grain
Nominal Size
Grade F b
F v
F C ^
F C //
E
E min
2″–4″ thick and
No. 1 1,850 175 565
1,850 1,700,000 620,000
2″–4″ wide
No. 2 1,500 175 565
1,650 1,600,000 580,000
2″–4″ thick and
No. 1 1,650 175 565
1,750 1,700,000 620,000
6″ wide
No. 2 1,250 175 565
1,600 1,600,000 580,000
2″–4″ thick and
No. 1 1,500 175 565
1,650 1,700,000 620,000
8″ wide
No. 2 1,200 175 565
1,550 1,600,000 580,000
2″–4″ thick and
No. 1 1,300 175 565
1,600 1,700,000 620,000
10″ wide
No. 2 1,050 175 565
1,500 1,600,000 580,000
2″–4″ thick and
No. 1 1,250 175 565
1,600 1,700,000 620,000
12″ wide
No. 2 975 175 565
1,450 1,600,000 580,000
Multiplier 3 of values for loads <7 days 1.25 1.25 1.0 1.25 1.0 1.0
Multiplier 4 of values for moisture > 19% 0.85 ∗ 0.97 0.67 0.8 ∗∗ 0.9 0.9
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Notes:
1. Values shown are for visually graded Southern Pine, ref. [2].
2. Values for Southern Pine are already adjusted for size, C F
= 1.0.
3. See Table 4-4 through 4-8 for other adjustment factors that may be applicable.
4. ∗ denotes when (F b
)(C F
) < 1,150 lb per sq in., C M
= 1.0
5.
∗∗
denotes when (F b
)(C F
) < 750 lb per sq in., C M
= 1.0
6. See the National Design Specification for Wood Construction for other grades and species of wood and for additional adjustments that may be appropriate
for conditions where wood is used.
TABLE 9-2 Reference Design Values of Southern Pine with < 19% Moisture
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