Grades

Arena Arena. Rough sawn No.2 and Better structural members are used to frame this structure.


Arena Community Center. No2 and Better structural timbers create the dramatic lines of this building. The rough members are finished in a semi-transparent stain.

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Clear Grades
Clear cedar in the grades shown on the following pages has a limited number of natural characteristics and is specified when appearance of the highest quality is desired. Clear grades of timbers are normally supplied green (unseasoned). When required, seasoning is achieved by air-drying.

Knotty Grades
Knotty cedar presents a more rustic appearance and is typically supplied green (unseasoned) in the appearance and structural grades shown on the following pages. When required, seasoning is achieved by air-drying except for grades of Light Framing and Structural Joists and Planks which are available kiln-dried.

Grade Classifications
Depending upon size, Western Red Cedar is classified as Light Framing, Structural Joists and Planks, Beams and Stringers, or Posts and Timbers. In general, the grades referred to herein are rough sawn.

Light Framing is lumber 2 to 4 inches thick and 2 to 4 inches wide either rough sawn or surfaced four sides (S4S).

Structural Joists and Planks are rectangular members 2 to 4 inches thick, 5 inches and wider, either rough sawn or surfaced four sides (S4S).

Beams and Stringers are rectangular members, either rough sawn or surfaced, 5 inches and thicker with width 2 inches greater than thickness.

Posts and Timbers are square members, either rough sawn or surfaced, 5 inches by 5 inches and larger with width not more than 2 inches greater than thickness.

Surface Textures
Saw Textured The saw textured surface, obtained during the milling process which uses either circular or band saws, is present on all four sides.

Rougher Headed The lumber receives its texture from a milling process which uses roughened planer knives. The rough texture is clearly visible on all four sides.

Surfaced Four Sides (S4S) The smooth surface on all four sides presents a uniformly sized product with a high quality appearance. Sizes from 2x4 up to 6x6 in. are generally available. Larger sizes are produced on special orders.


Fence and Gateway. A four post gated entry complements the intricate detail of the fence. A natural tone stain has been used to provide protection and colour.

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GRADES OF TIMBER AND LANDSCAPE LUMBER:
SPECIFICATIONS

Grade Description Grading Rule Paragraph
No. 2 and Better Clear
THUMBNAIL OF TIMBER This grade should be specified when the finest quality rough lumber is desired. The lumber is sound and well manufactured. Its natural characteristics do not detract from the woodÕs fine appearance. Export R List 401
D and Better Clear
THUMBNAIL OF TIMBER This grade consists of D Clear, C Clear, and B Clear

The C and Better Clear grade offers good appearance in high quality, well manufactured lumber. Suitable for high quality landscape structures and as exposed posts and beams in heavy timber construction. WRCLA members produce this grade without cut-outs. In most cases, this grade is sold with a specified allowance of D grade.

D Clear grade permits larger and more numerous natural characteristics which are widely accepted in the construction of outdoor structures. Some pieces of D Clear may require trimming to yield clear lengths for the intended use. Available surfaced or rough textured.
2" and thinner, 3"and wider NLGA 202 b,c,d
WCLIB 149 b,c,d

2-1/4" and thicker, 3"and wider
NLGA 203 b,c,d
WCLIB 150 b,c,d
Appearance Knotty
THUMBNAIL OF TIMBER A non structural product manufactured to meet the appearance requirements of quality projects. This material has highly restricted wane allowances to give well defined corners. Contains no holes or other characteristics. Represents good value for appearance end uses. Available rough sawn or rougher headed in nominal 2" and thicker sizes.

Note: Upon request, Appearance Knotty timbers are available with structural grading. Be certain to specify Appearance Knotty structural lumber when strength characteristics are required.
Proprietary
No. 2 and Better Structural
THUMBNAIL OF TIMBER Material of this grade is evaluated for structural strength characteristics. The classification includes pieces meeting the grades of Select Structural, No. 1 Structural, and No. 2 Structural. Lumber of this grade is intended for engineered applications where strength is more important than appearance. Available surfaced or rough textured.

  Graded as Light Framing
* Graded as Structural Joists and Planks
2"x2"/4" to 4"x4"  
NLGA 122 b,c
WCLIB 122 b,c
WWPA 40.11

2"x6" to 4"x12" and wider*
NLGA 124 a,b,c
WCLIB 123 a,b,c
WWPA 62.10

5" and thicker, width more than 2" greater than thickness
NLGA 130 a,b,c
WCLIB 130 a,b,cc
WWPA 70.10

width less than 2" greater than thickness
NLGA 131 a,b,c
WCLIB 131 a,b,cc
WWPA 80.10
Standard Beams, Posts and Timbers
THUMBNAIL OF TIMBER Timbers of this grade are intended for general construction purposes where serviceability is more important than appearance. No structural values are assigned. Available surfaced or rough textured. 5" and thicker
NLGA 131 c
WCLIB 131 c
WWPA 81.11


1 NLGA - National Lumber Grades Authority
WCLIB - West Coast Lumber Inspection Bureau
WWPA - Western Wood Products Association
R List - Export R List (applies to rough sawn/rougher headed lumber)




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