| FIRE ENDURANCE, SOUND
TRANSMISSION Grade and Strength of Material
- Standard grades for each product class should be specified after considering all grades
appropriate for the intended use and strength requirements. For structural applications,
include the required design values along with the grade that represents those design
values. Grades and design values are listed on page 9-12.
Moisture Content - Specify desired
moisture content (percent) based on requirements for the product, grade and intended use.
Most product classes and grades of Southern Pine have specific moisture requirements.
Seasoning requirements and options are listed on page 8.
Surface Texture - Surfacing requirements
should be specified. Lumber is commonly ordered S4S (smooth surfaced on all four sides),
or rough sawn. Other examples include: S1S2E (surfaced one side and two edges); or
S2S&CM (surfaced two sides and center matched on edges with centered tongue and
groove). Variances from S4S will cause a change from the standard dressed size, so the
effect on desired net dry size should be considered. See the SPIB Standard Grading Rules
for Southern Pine Lumber for more information on surfacing designations and net product
sizes.
Transportation and Storage - All lumber in
transit, storage and handling areas should be protected from moisture, weather and
contaminants. Coatings, wrappings or coverings should allow circulation and not trap
moisture. Proper storage methods are explained on page 15.
Preservative Treatment - Pressure-treated
lumber should conform to the approved standards of the American Wood Preservers'
Association (AWPA). Each piece of lumber should be identified with a quality mark by an
ALSC-accredited inspection agency. Job site fabrication cuts and borings should be field
treated with copper naphthenate having a minimum of 2% copper metal, in accordance with
AWPA Standard M4. Products, preservatives, uses and standards are described on pages
16-18.
| LUMBER SPECIFICATION EXAMPLES* Based on 1994 SPIB Grading Rules |
| Product |
Size |
Length |
Species |
Grade |
Moisture Content |
Surface Texture |
Treatment & Retention |
AWPA Standards |
| Classification |
|
|
|
|
Dimension
(or) |
2 x 4 |
x 20' |
SP |
No. 1DNS
2000Fb |
KD15 |
S4S |
None required |
|
Structural
Ligh Framing |
4 x
4 |
x 8' |
SP |
No.2 |
KD19 |
S4S |
CCA.40pcf
(Ground contact) |
C2 |
Dimension
(or) |
2 x 6 |
x 10' |
SP |
No.2 |
KD19 |
S4S |
CCA .60pcf KDAT (PWF) |
C22 |
Structural
Joists & Planks |
2 x
10 |
x
14' |
SP |
No.3 |
KD19 |
S4S |
None
required |
|
| Stud |
2 x 4 |
x 10' |
SP |
Stud |
KD19 |
S4S |
None required |
|
| MSR |
2 x
6 |
x
16' |
SP |
1950f-1.7E |
KD19 |
S4S |
None
required |
|
Radius Edge
Decking |
5/4 x 6 |
x 10' |
SP |
Premium
RED |
KD19 |
S4S |
CCA .25pcf (Above ground) |
C2 |
| Boards (Fascia) |
1 x
6 |
x
12' |
SP |
No.
1 |
KD19 |
S4S |
CCA
.25pcf KDAT |
C2 |
| Finish (Trim) |
1 x 4 |
x 8' |
SP |
D |
Max. 15% |
S4S |
None required |
|
| Paneling Pattern #SPP 62 |
4-1/8
(net dry) |
x
10' |
SP |
C&Btr |
12% |
|
None
required |
|
| Flooring |
1 x 2-1/8
(net dry) |
x 8', 10', 12'
1000 Lin. ft. |
SP |
D |
Max. 15% |
S2S&SM
(flat grain) |
None required |
|
| Ceiling |
5/8
x 4 |
x 8' |
SP |
C&Btr |
Max.
15% |
S2S&CM-EV1S |
None
required |
|
| Decking (Roof) |
2 x 6 |
x 12' |
SP |
Select
Decking |
KD15 |
S2S&CM |
None required |
|
Drop Siding
Pattern #116 |
1 x 6 |
x 10' |
SP |
No. 2 |
KD19 |
|
CCA .25pct KDAT |
C2 |
| Timbers |
6 x 6 |
x 12' |
SP |
No. 2 |
Dry to 23% |
S4S |
CCA .50pcft (Highway post) |
C14 |
| Special Order (Decking rough one side) |
2 x 6
1-9/16 x 5-1/2
(net dry) |
x 16' |
SP |
Prime |
KD19 |
S1S2E |
CCA .40pcf KDAT (CCA with water repellent) |
C2 |
| MarineGrades |
2 x 8 |
x 14' |
SP |
No. 2 |
KD19 |
S2S&CM |
CCA 2.5pcf |
C18 |
- Abbreviations: MSR - Machine Stress Rated; SP - Southern
Pine (could also be "SYP"); MC - moisture content; S4S - surfaced four sides;
S2S&SM - surfaced two sides and standard matched; S2S&CM-EV1S - surfaced two sides
and center matched with edge V on one side; S1S2E - surfaced one side and two edges; PWF -
permanent wood foundation; KDAT - kiln-dried after treatment; AWPA - American Wood
Preservers' Association.
|
