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| Southern Pine Design Values |
TABLE 2: TIMBERS
Based on 2002 SPIB Grading Rules
Values in pounds per square inch (psi)
Table 2 Timbers
5" x 5" and larger |
Based on Dry or Wet Service Conditions
See Tables A-1 and A-3 for Adjustment Factors
|
| Size |
Grade |
Extreme Fiber Stress in Bending
Fb1
Single Member Uses
|
Tension
Parallel
to Grain
Ft
|
Horizontal
Shear
Fv2
|
Compression
Perpendicular
to Grain
Fc⊥
|
Compression
Parallel
to Grain
Fc
|
Modulus
of
Elasticity
E
|
5" x 5"
and larger
|
Dense Select Structural
Select Structural
No.1 Dense
No.1
No.2 Dense
No.2
|
1750
1500
1550
1350
975
850
|
1200
1000
1050
900
650
550
|
165
165
165
165
165
165
|
440
375
440
375
440
375
|
1100
950
975
825
625
525
|
1,600,000
1,500,000
1,600,000
1,500,000
1,300,000
1,200,000
|
(1) When the depth, d, of a timber exceeds 12", the tabulated
bending design value, Fb, shall be multiplied
by the following size factor:
CF=( 12/d )1/9 where d
is the actual depth of the member.
(2) These shear design values are higher than those published in the 1997
NDS® Supplement: Design Values for Wood Construction. Design values,
including these shear design values, should only be applied in conjunction
with the appropriate design provisions in the NDS®. It is important,
therefore, that these new shear design values be used only in conjunction
with the new 2001 NDS®, and not the 1997 NDS® or
earlier editions. |
Disclaimer:
The Southern Pine Council™ does not test lumber or establish design values. The purpose of these tables is to collect and organize data available from other sources for the convenience of builders, engineers, architects and other professionals. The Southern Pine design values contained herein are taken from the Standard Grading Rules for Southern Pine Lumber, 2002 Edition, published by the Southern Pine Inspection Bureau, and the adjustment factors are taken from the National Design Specification® (NDS®) for Wood Construction, 2001 Edition, published by the American Forest & Paper Association. Neither the Southern Pine Council™, nor its members, warrant that the data from such sources on which the recommended uses of Southern Pine lumber contained herein are based is correct, and disclaim responsibility for injury or damage resulting from the use of such design values.
The conditions under which lumber is used in construction may vary widely, as does the quality of workmanship and construction methods. Neither the Southern Pine Council™, nor its members, have knowledge of the quality of the workmanship or construction methods used on any construction project, and, accordingly, do not warrant the design or performance of the lumber in completed structures.
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