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TABLE 1: DIMENSION LUMBER
Based on 2002 SPIB Grading Rules
Values in pounds per square inch (psi)

Table 1 Dimension Lumber 2" to 4" thick, 2" and wider
Based on Normal Use Conditions (MC≤19%)¹ See Tables A-1 thru A-4 for Adjustment Factors
Size	Grade	Extreme Fiber Stress in Bending F_b		Tension Parallel to Grain F_t	Horizontal Shear F_v⁵	Compression Perpendicular to Grain F_c⊥	Compression Parallel to Grain F_c	Modulus of Elasticity E
Size	Grade	Single Member Uses	Repetitive Member Uses²	Tension Parallel to Grain F_t	Horizontal Shear F_v⁵	Compression Perpendicular to Grain F_c⊥	Compression Parallel to Grain F_c	Modulus of Elasticity E
2" to 4" thick, 2" to 4" wide Includes: 2x2 2x3 2x4 3x3 3x4 4x4	Dense Select Structural Select Structural NonDense Select Struc No.1 Dense No.1 No.1 NonDense No.2 Dense No.2 No.2 NonDense No.3 and Stud Construction Standard Utility ³	3050 2850 2650 2000 1850 1700 1700 1500 1350 850 1100 625 300	3510 3280 3050 2300 2130 1950 1960 1720 1550 980 1270 720 345	1650 1600 1350 1100 1050 900 875 825 775 475 625 350 175	175 175 175 175 175 175 175 175 175 175 175 175 175	660 565 480 660 565 480 660 565 480 565 565 565 565	2250 2100 1950 2000 1850 1700 1850 1650 1600 975 1800 1500 975	1,900,000 1,800,000 1,700,000 1,800,000 1,700,000 1,600,000 1,700,000 1,600,000 1,400,000 1,400,000 1,500,000 1,300,000 1,300,000
2" to 4" thick, 5" to 6" wide Includes: 2x5 2x6 3x5 3x6 4x5 4x6	Dense Select Structural Select Structural NonDense Select Struc No.1 Dense No.1 No.1 NonDense No.2 Dense No.2 No.2 NonDense No.3 and Stud	2700 2550 2350 1750 1650 1500 1450 1250 1150 750	3100 2930 2700 2010 1900 1720 1670 1440 1320 865	1500 1400 1200 950 900 800 775 725 675 425	175 175 175 175 175 175 175 175 175 175	660 565 480 660 565 480 660 565 480 565	2150 2000 1850 1900 1750 1600 1750 1600 1500 925	1,900,000 1,800,000 1,700,000 1,800,000 1,700,000 1,600,000 1,700,000 1,600,000 1,400,000 1,400,000
2" to 4" thick, 8" wide Includes: 2x8 3x8 4x8⁴	Dense Select Structural Select Structural NonDense Select Struc No.1 Dense No.1 No.1 NonDense No.2 Dense No.2 No.2 NonDense No.3 and Stud	2450 2300 2100 1650 1500 1350 1400 1200 1100 700	2820 2650 2420 1900 1730 1550 1610 1380 1260 805	1350 1300 1100 875 825 725 675 650 600 400	175 175 175 175 175 175 175 175 175 175	660 565 480 660 565 480 660 565 480 565	2050 1900 1750 1800 1650 1550 1700 1550 1450 875	1,900,000 1,800,000 1,700,000 1,800,000 1,700,000 1,600,000 1,700,000 1,600,000 1,400,000 1,400,000
2" to 4" thick, 10" wide Includes: 2x10 3x10 4x10⁴	Dense Select Structural Select Structural NonDense Select Struc No.1 Dense No.1 No.1 NonDense No.2 Dense No.2 No.2 NonDense No.3 and Stud	2150 2050 1850 1450 1300 1200 1200 1050 950 600	2470 2360 2130 1670 1500 1380 1380 1210 1090 690	1200 1100 950 775 725 650 625 575 550 325	175 175 175 175 175 175 175 175 175 175	660 565 480 660 565 480 660 565 480 565	2000 1850 1750 1750 1600 1500 1650 1500 1400 850	1,900,000 1,800,000 1,700,000 1,800,000 1,700,000 1,600,000 1,700,000 1,600,000 1,400,000 1,400,000
2" to 4" thick, 12" wide⁶ Includes: 2x12 3x12 4x12^⁴	Dense Select Structural Select Structural NonDense Select Struc No.1 Dense No.1 No.1 NonDense No.2 Dense No.2 No.2 NonDense No.3 and Stud	2050 1900 1750 1350 1250 1150 1150 975 900 575	2360 2190 2010 1550 1440 1320 1320 1120 1040 660	1100 1050 900 725 675 600 575 550 525 325	175 175 175 175 175 175 175 175 175 175	660 565 480 660 565 480 660 565 480 565	1950 1800 1700 1700 1600 1500 1600 1450 1350 825	1,900,000 1,800,000 1,700,000 1,800,000 1,700,000 1,600,000 1,700,000 1,600,000 1,400,000 1,400,000
(1) Moisture designations KD, KD19, KD15, S-DRY, MC15 and MC19 all have identical design values. (2) Repetitive member uses apply to joists, truss chords, rafters, studs, planks, decking or similar members which are in contact or spaced not more than 24" on center, are not less than three [3] in number, and are joined by floor, roof or other load distributing elements adequate to support the design load. The Repetitive Member Factor, C_r=1.15, has been included in the listed Repetitive Member Use design values. (3) For Utility, design values apply to 4" wide lumber only. (4) For lumber 4" thick and 8" or wider, multiply the F_b value by C_F=1.1. (5) 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. (6)For lumber wider than 12", multiply these 12" width values by C_F=.90 for F_b , F_t , and F_c values, and C_F=1.00 for F_v , F_c⊥, and E values.

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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