Products & Sizes

Table 1. Size differential Between Unseasoned and Dry Lumber
Nominal
Dimension (in.) 		Size Differential Between
Unseasoned and Dry Lumber
After Surfacing (in.)
1-1/2 or less 1/32
2 to 4 1/16
5 to 7 1/8
8 or more 1/4

 

Table 2. Western Red Cedar Products
Product Thickness inches
(nominal) 		Width inches
(nominal) 		Grade Grading Rule Paragraph
NLGA WWPA WCLIB
Bevel Siding
Clear 		1/2, 3/4 4, 6, 8, 10 Clear V.G. Heart
A
Rustic
B
C
Proprietary
201a
201b
201d
201c
201e
n/a
21.11
21.12
n/a
21.13
21.14
n/a
106-aa
106-a
n/a
106-b
106-c
n/a
Knotty 5/8, 11/16 3/4, 7/8 6, 8, 10, 12 Select Knotty
Quality Knotty
Proprietary
205a

205b
n/a
30.22

30.23
n/a
111-e

111-f
n/a
Knotty-Rabbetted 3/4, 5/4 6, 8, 10 Select Knotty
Quality Knotty
205a

205b
30.22

30.23
111-e

111-f
Knotty-Wavy Edged 7/8 10, 12 Select Knotty
Quality Knotty
205a

205b
30.22

30.23
111-e

111-f
Pattern Siding
Clear 		1 4, 6, 8 Clear Heart
A
B
 200a
200b
200c
 20.11
20.12
20.13
 102-b
102-c
102-d
Knotty 1 4, 6, 8 Select Knotty
Quality Knotty
Standard and Better

Proprietary
204a

204b

114a,b,c

n/a
30.22

30.33

n/a

n/a
111-e

111-f

118-a,b,c
n/a
Clear Finish 1/2, 1, 5/4, 2 2, 3, 4, 6, 8, 10, 12 Clear Heart
A
B
 200a
200b
200c
 20.11
20.12
20.13
 102-b
102-c
102-d
Boards 1 2, 3, 4, 6, 8, 10, 12 Select Knotty
Quality Knotty
Standard and Better
204a

204b

114a, b, c
n/a

n/a

30.50
(118-a, b, c)
111-e

111-f

118a, b, c
Fence Boards 1 6, 8, 10 Select Knotty
Quality Knotty
Rustic
210a

210b
n/a

n/a

n/a
n/a
117-a

117-b
117-c
Roof Decking 2, 3, 4, 6, 8 Select
Commercial
 127b
127c
 55.11
55.12
 127-b
127-c
Outdoor Decking
Clear 		5/4, 2 4, 6 Architect Clear
Custom Clear
Contractor Clear
n/a

n/a

n/a
n/a

n/a

n/a
n/a

n/a

n/a
Knotty 5/4, 2 4, 6 Architect Knotty
Custom Knotty
Contractor Knotty
n/a

n/a

n/a
n/a

n/a

n/a
n/a

n/a

n/a
Paneling
Clear 		1/2, 1 4, 6, 8 Clear Heart
A
B
 200a
200b
200c
 20.11
20.12
20.13
 102-b
102-c
102-d
Knotty 1/2, 1 4, 6, 8 Select Knotty
Quality Knotty
204a

204b
n/a

n/a
111-e

111-f
Garden Lumber 2, 3, 4

2, 3, 4
 2, 3, 4,

6, 8, 10, 12
 Appearance
Standard and Better

Appearance
No.2 and Better
 n/a

122b,c

n/a

124a,b,c
 n/a

40.11,
12
n/a

62.10, 11, 12
 n/a

122-b, c
n/a

123-a, b, c
Timbers 5, 6, 8, 10, 12 5, 6, 8, 10,12 and wider Appearance
Standard and Better
 n/a

131a,b,c
 n/a

80.10, 11, 12
 n/a

131-a, b, c
Structural
Timbers 		5, 6, 8, 10, 12 5, 6, 8, 10, 12
*Width more than 2" greater than thickness 		*no.2 and Better 130a,b,cc 70.10, 11, 12 130-a, b, cc

Notes:

  1. Siding is available kiln-dried or air-dried with smooth or saw-textured surface. Factory primed siding is also available.
  2. Paneling is available kiln-dried with smooth or saw-textured surface.
  3. Grade descriptions are given in NLGA, WWPA, and WCLIB grading rules. Grade descriptions of proprietary products are available from the manufacturer.
Table 3. Sizes of Rough Western Red Cedar
Thickness (in.) 1 1-3/4 2 3 4 6 8 10 12 14
Width (in.) 2 4 6 8 10 12 14


 

Table 4. Sizes of Dressed Western Red Cedar
Item Thickness (in.) Width (in.)
Nominal Actual Nominal Actual
Dry Green Dry Green
Boards 1

1-1/4




 11/16

1




 3/4

1-1/32




 2
3
4
6
8
10
12
 1-1/2
2-1/2
3-1/2
5-1/2
7-1/4
9-1/4
11-1/4
 1-9/16
2-9/16
3-9/16
5-9/16
7-3/8
9-3/8
11-3/8
Garden Lumber 2

3

4


 1-1/2

2-1/2

3-1/2


 1-9/16

2-9/16

3-9/16


 2
3
4
6
8
10
12
 1-1/2
2-1/2
3-1/2
5-1/2
7-1/4
9-1/4
11-1/4
 1-9/16
2-9/16
3-9/16
5-9/16
7-3/8
9-3/8
11-3/8
Timbers* 5
6
8
4-1/2
5-1/2
7-1/2
 5
6
8
4-1/2
5-1/2
7-1/2

*Surfaced timbers 10" and larger available only on special order. Confirm before specifying.

Cedar Siding