Dimension Lumber, Jones Wholesale Lumber

Dimension Lumber Products | Dimension Lumber Adjustment Factors | Douglas Fir Load Table 1
Douglas Fir Load Table 2 | Conditions of Use Adjustments

Dimension Lumber Products

#2 & Btr DF Green S4S Mill S4S
2x4, 2x6, 2x8, 2x10, 2x12	GRN	22’ to 32’
3x4, 3x6, 3x8, 3x10, 3x12	GRN	8’ to 24’

#2 & Btr DF Green Rough (RO) Mill Rough, Standard Sawn, Resawn, Exposed
2x4, 2x6, 2x8, 2x10, 2x12, 2x14	GRN	8’ to 24’

#1 & Btr DF Green S4S Mill S4S
2x4, 2x6, 2x8, 2x10, 2x12, 2x14, 2x16	GRN	8’ to 28’
3x4, 3x6, 3x8, 3x10, 3x12, 3x14, 3x16	GRN	8’ to 24’
4x4, 4x6, 4x8, 4x10, 4x12, 4x14, 4x16	GRN	8' to 24'

Surface from Rough, 100% FOHC, Exposed
3x4, 3x6, 3x8, 3x10, 3x12, 3x14, 3x16	GRN	8’ to 32’
4x4, 4x6, 4x8, 4x10, 4x12, 4x14, 4x16	GRN	8’ to 32’

#2 & Btr DF Kiln Dried (KD) S4S Mill S4S
3x6	KD	8’ to 20’
4x4, 4x6, 4x8, 4x10, 4x12	KD	8’ to 24’

#1 & Btr DF Kiln Dried (KD) S4S

2x4, 2x6, 2x8, 2x10, 2x12

8’ to 28’

3x4, 3x6, 3x8, 3x10, 3x12

8’ to 24’

4x4, 4x6, 4x8, 4x10, 4x12

8’ to 24’

6x6, 6x8, 6x10, 6x12

8’ to 24’

8x8, 8x10, 8x12

8’ to 24’

Custom Milling

● Surfacing

● Resawing

● Corbels

● Knee Braces

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Allowable Properties for Dimension Lumber WCLIB 2005

Heat Treated Packaging Regulations IPPC

Dimension Lumber Adjustment Factors

Size-Adjusted Values

In the following tables, In-Grade-derived Base Values have been adjusted for size and repetitive member use for your convenience.

These tables are intended for those who are more comfortable selectinga size-adjusted number from a table rather than using a Base Value (which is a species constant) along with a Size Adjustment. These size adjusted values may be further adjusted for specific conditions of use (refer to Adjustment Factor Tables C-G on).

The Western Lumber Size-Adjusted Values can be directly compared to the pre-In-Grade design values and to Southern Pine empirical values.

Western Lumber Species Groups

The results of the In-Grade Testing Program allowed for new species groupings. Instead of the ten Western Lumber species groups of the past, there are now six for increased ease of design. The individual species included in the Douglas Fir-Larch, Hem-Fir, Douglas Fir-South and Western Cedar groupings are essentially unchanged. However, WWPA's Western Woods combination has been modified,and a new U.S. species grouping, Spruce-Pine-Fir (South), has been developed to include the Western spruces and Lodgepole Pine, represented by WWPA, along with Eastern species, represented by NELMA and NSLB. The individual species in each species grouping are listed below and in the table headings on the following pages.

Species Groups

DOUGLAS FIR-LARCH Douglas Fir Western Larch DOUGLAS FIR-SOUTH Douglas Fir grown in AZ, CO,NV, NM& UT HEM-FIRM Western Hemlock Noble Fir California Red Fir Grand Fir Pacific Silver Fir White Fir		SPRUCE-PINE-FIR(SOUTH) Englemann Spruce Sitka Spruce Lodgepole Pine WESTERN WOODS Alpine Fir Ponderosa Pine Sugar Pine Idaho White Pine Mountain Hemlock WESTERN CEDARS Incense Cedar Western Red Cedar Port Orford Cedar Alaska Cedar

Adjustment Factors

The Size-Adjusted Values in this publication are derived by using species-group base values along with the adjustment factors for each size. Repetitive member Fb values (for 2” to 4” wide by 2” & 3” thick lumber) are also provided. If using 4” thick lumber in a repetitive system, refer to ** footnote below each table.

Size-adjusted values may be further adjusted for specific conditions of use, e.g., Duration of Load, Horizontal Shear, Flat Use, Compression Perpendicular to Grain and Wet Use (for unusual situations in which lumber is used in circumstances where the moisture content will exceed 19%).

These conditions-of-use adjustments are presented in Tables C-G on. The following chart indicates how these adjustments should be applied to the Size-Adjusted Values in this publication.

Note to Design Professionals

Design professionals are encouraged to use Base Values for Dimension Lumber, as presented in the Western Lumber Grading Rules '91 and in the WWPA Product Use Manual. While the size-adjusted values in this publication are accurate (rounded up to the nearest 5), engineers, architects, specifiers and the truss industry are encouraged to use Base alues and base-value design procedures.

If lumber products are specified on the basis of Fb value, then the specification must be clearly identified as a Base-Value Fb or a Size-Adjusted Fb. Specifiers may continue to specify lumber products according to grade name (and paragraph number from a grading rules book) as in the past, because the grades have not changed.It is important to distinguish Base Value numbers from Size-Adjusted numbers if and when Fb values are used in a written specification.

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Douglas Fir Load Table 1