Chromated Copper Arsenate Treated Timbers

Jan 10 2003

Topics Covered

Background

How is Timber Treated with Chromated Copper Arsenate

What are Chromated Copper Arsenate Treated Timbers Used For?

Disposing of Chromated Copper Arsenate Treated Timbers

The Future of Chromated Copper Arsenate Treated Timbers

Alternatives to Chromated Copper Arsenate Treated Timbers

Background

Chromated copper arsenate (CCA) is a chemical registered for use as a wood preservative.

How is Timber Treated with Chromated Copper Arsenate

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It is injected into wood at high pressure so that it saturates the wood. It is used to protect wood from dry rot, fungi, moulds, termites and other pests that can compromise the integrity of the timber.

What are Chromated Copper Arsenate Treated Timbers Used For?

Chromated copper arsenate treated timbers are commonly used for decks, walkways, fences, gazebos, pergolas etc. Other uses chromated copper arsenate treated timbers include highway noise barriers, sign posts, utility posts and retaining walls.

Disposing of Chromated Copper Arsenate Treated Timbers

Chromated copper arsenate treated timbers should not be burned, mulched or used for compost. They should be disposed of using solid municipal waste methods.

The Future of Chromated Copper Arsenate Treated Timbers

In the USA, industry has volunteered to cease using chromated cooper arsenate treated timbers by the end of 2003. This decision has been supported by the EPA who will ban chromated copper arsenate treated wood for residential applications.

Alternatives to Chromated Copper Arsenate Treated Timbers

In response to this alternative treatments and preservatives have been developed and registered with the EPA. Other possible alternative materials include untreated woods such as cedar and redwood, plastics, metals and composite materials.

 

Source: AZoM.com

 

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