Pressure Treated & Fire Retardant
Preservative-treated Douglas fir lumber, timbers and plywood for ground contact, sill plates and heavy-duty applications, plus U-L listed interior and exterior fire-retardant lumber and panels. Custom treating is available.
Pressure Treated
Preservatives
.40 ACQ-B #2 DF S4S, AWPA UC4A| Sizes | Spec | Lengths | 0'10'20'30'40'50' |
|---|---|---|---|
| 2x4, 2x6*, 2x8*, 2x10*, 2x12* | GRN | 8' to 20' | |
| 3x4, 3x6, 3x8, 3x10, 3x12* | GRN | 8' to 20' | |
| 4x4, 4x6*, 4x8*, 4x10*, 4x12* | GRN | 8' to 20' | |
| .40 ACQ-B #1 DF S4S, AWPA UC4A | |||
| 2x14, 3x14, 4x14 | GRN | 16', 20', 24' | |
| .40 ACQ-B #1 DF S4S, AWPA UC4A Kiln Dried After Treatment (KDAT) | |||
| 2x4, 2x6, 2x8 | KDAT | 16' and 20' | |
| 3x4 | KDAT | 16' only | |
| 3x6, 3x8 | KDAT | 16' and 20' | |
| .60 ACQ-B #1 DF S4S, AWPA UC4B | |||
| 6x6, 6x8, 6x10, 6x12, 6x14 | GRN | 16' to 24' | |
| 8x8 | GRN | 16' to 24' | |
| .40 ACQ-B #3 DF Rough Lagging, AWPA UC4A | |||
| 3x12, 4x12 | GRN | 6' to 24' | |
| Borate SBX #2 DF S4S, UC2 Plate Use Only | |||
| 2x4, 2x6, 2x8 | GRN | 8' to 20' | |
| 3x4, 3x6 | GRN | 8' to 20' | |
| Borate SBX #1 DF S4S, UC2 Plate Use Only Kiln Dried After Treatment (KDAT) | |||
| 2x4, 2x6, 2x8 | KDAT | 16' and 20' | |
| Temporary Power Pole .40 ACQ-D | |||
| Class 6/7, Approx Size: Tip = 5", Butt = 8" | 25' | ||
| Permanent Power Pole Copper Naphthenate, C-4 | |||
| Class 1 thru 7 | 25' to 50' | ||
| CCA Treated Plywood | |||
| 1/2, 5/8, 3/4, 1, 1-1/8 | CDX | 4x8 | |
| .60 CCA, KDAT, AWPA C-9 & C-22 FDN | |||
| 3/4, 1-1/8 | UDL, T&G | 4x8 | |
- Available in 24' lengths
- Allow Approx 1 week depending on size
Fire Retardant
Interior Fire Retardant Plywood KDAT, AWPA, C-27, P-17, U-L Listed| Sizes | Spec | Lengths | 0'8'16'24'32' |
|---|---|---|---|
| 3/8, 1/2, 5/8, 3/4 | CDX | 4x8 | |
| 3/8, 1/2, 5/8, 3/4 | CDX STR-1 | 4x8 | |
| 1/2 | CDX STR-1 | 4x10 | |
| 1/4, 3/8, 1/2, 5/8, 3/4, 1 | ACX | 4x8 | |
| 3/4 | ACX | 4x10 | |
| 5/8, 3/4 | CDX STR-1 T&G | 4x8 | |
| 5/8, 3/4, 1-1/8 | UDL T&G | 4x8 | |
| Interior Fire Retardant Lumber DF S4S, KDAT, AWPA, C-20, P-17, U-L Listed | |||
| 1x4, 1x6 | Std/Btr GRN | 12' to 16' | |
| 2x4 | Std/Btr GRN | 8' to 20' | |
| 2x6 | #2 GRN | 8' to 20' | |
| 2x8, 2x10 | #2 GRN | 8' to 12', 16', 20' | |
| 2x12 | #2 GRN | 10', 12', 16', 20' | |
| 3x4 | #2 GRN | 16' only | |
| 3x6, 3x8 | #1 GRN | 12', 16', 20' | |
| 4x4 | #1 GRN | 8' to 12', 16' to 20' | |
| 4x6, 4x8, 4x12 | #1 GRN | 12', 16', 20' | |
| 4x10 | #1 GRN | 16' and 20' | |
| 6x6, 6x8 | #1 GRN | 8' to 12', 16' and 20' | |
| 6x10, 6x12 | #1 GRN | 16' and 20' | |
| Exterior Fire Retardant Plywood DF S4S, KDAT, AWPA UCFB, U-L Listed, Hoover Exterior Fire-X® | |||
| 3/4 | ACX | 4x8 | |
| 1/2, 5/8, 3/4 | CDX | 4x8 | |
| Exterior Fire Retardant Lumber DF #1 S4S, KDAT, AWPA UCFB, U-L Listed, Hoover Exterior Fire-X® | |||
| 2x4, 2x6, 2x8, 2x10, 2x12 | KDAT | 16' only | |
| 4x6 | KDAT | 16' only | |
ACQ use categories
Alkaline Copper Quaternary uses copper as the primary protection, with quat added against copper-tolerant fungi and termites. It contains no EPA-listed carcinogens and is standardized by the American Wood Protection Association (AWPA).
| Exposure | AWPA category | Retention (pcf) | Typical uses |
|---|---|---|---|
| Interior, dry | UC1 | 0.15 | Interior furniture, millwork |
| Interior, damp | UC2 | 0.15 | Interior beams, flooring, sill plate |
| Above ground, protected and coated | UC3A | 0.15 | Coated millwork, siding, trim |
| Above ground, exposed | UC3B | 0.15 | Decking, arbors, gazebos, walkways, railings, fence pickets |
| Ground or freshwater contact | UC4A | 0.40 | Fence posts, deck posts, raised beds |
| Heavy-duty ground contact | UC4B | 0.60 | Utility and building poles, permanent wood foundations, retaining walls |
Fasteners
Use code-approved, corrosion-resistant fasteners on all exterior work: hot-dipped galvanized fasteners (ASTM A153) and connectors (ASTM A653 G185) or better. Use stainless steel for permanent wood foundations and saltwater exposure, and avoid direct contact between treated wood and aluminum.
Custom treating
Exterior fire retardant, resawn patio and trim stock, and custom preservative and fire-retardant lumber and panels are available on request.
Custom milling
Any of this stock can be milled to order in our Lynwood mill.