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

Nominal Size Grade
2″-4″ thick No. 1
and 2″-4″ wide No. 2
2″-4″ thick No. 1
and 6″ wide No. 2
2″-4″ thick No. 1
and 8″ wide No. 2
2″-4″ thick No. 1
and 10″ wide No. 2
2″-4″ thick No. 1
and 12″ wide No. 2
Multiplier 3 of values
for loads < 7 days
Multiplier 4 of values
for moisture > 19%
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Reference Design Values for Southern Pine, lb per sq in
Extreme Fiber
in Bending
Shear Parallel
to Grain
Compression Perpendicular
to Grain
Compression Parallel
to Grain
Modulus of Elasticity
F b
F v
F C ^
F C //
E
E min
1,850 175
565
1,850
1,700,000 620,000
1,500 175
565
1,650
1,600,000 580,000
1,650 175
565
1,750
1,700,000 620,000
1,250 175
565
1,600
1,600,000 580,000
1,500 175
565
1,650
1,700,000 620,000
1,200 175
565
1,550
1,600,000 580,000
1,300 175
565
1,600
1,700,000 620,000
1,050 175
565
1,500
1,600,000 580,000
1,250 175
565
1,600
1,700,000 620,000
975 175
565
1,450
1,600,000 580,000
1.25 1.25 1.0 1.25 1.0 1.0
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 Tables 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 4-2 Reference Design Values of Southern Pine with Less Than 19% Moisture
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