Technical Specifications

What is CCA and How Does It Work?

The Wolmanac® CCA preservative treatment is a mixture of the oxides of copper, chromium, and arsenate known as CCA. In the treatment process, the active ingredients become fixed, or chemically bound, in the wood cells as highly leach-resistant insoluble precipitates.

Model Specifications

ICC-ES Reports

SDSs for Treated Wood Products

Retention and Penetration

Wolmanized® Heavy Duty™ pressure-treated wood is treated to various retention levels that are intended to protect the wood for particular applications.

AWPA Retention Requirements1

Application

Use Category

CCA (pcf)

LUMBER, TIMBERS, AND PLYWOOD

Above Ground

3B

0.25

Ground/Fresh Water Contact

4A

0.40

Salt Water Splash

4B

4B 0.60

Permanent Wood Foundation

4B

4B 0.60

Salt Water Immersion

5B

5B 2.50

POLES AND PILES

Structural/Utility Poles

4B

0.60

Foundation/Fresh Water

4C

0.80

Salt Water Immersion

5A

1.502

Salt Water Immersion

5B

2.50

Salt Water Immersion

5C

2.50 or dual Treatment:

CCA & 20.0 Creosote

1Wolmanac® CCA preservative meets or exceeds AWPA P5 and Federal Standard TT-W-550. The treating process and the results above meet or exceed Federal Specification TT-W-571 and AWPA Commodity Standards as applicable.

2For round piling used in the northern zone (Long Island and north on the East coast, north of San Francisco on the West coast), a retention of 1.50 pcf is acceptable (UC5A).