TIMBER TREATMENT
Fifty year’s of experience in timber treatment and an unwavering  commitment to high standards in the industry are an assurance to Woodline’s customers that our treated timber products will provide lifetime service, whether they are treated with Creosote or CCA (Tanalised). The amount of preservative chemical that is impregnated into the timber is determined by the required SABS specification and Hazard class, or according to the clients own specific requirement or specification.

CREOSOTE TREATMENT

Creosoting is done using the Rueping (Empty Cell) process in pressure vessels. Creosote retention levels are set to exceed minimum requirements of the relevant specification, and additional creosote can be retained in the pole should customers require. Mostly complete penetration of the sapwood is achieved and will always exceed minimum depth requirements. Creosote treated poles could last in excess of 40 years.

CCA TREATMENT

CCA is a waterborne chemical that is used to impregnate poles using the Liquivac process. The entire sapwood is penetrated ensuring a life long service free from insect and fungal attack. CCA (Tanalith) is enhanced with "Weatherwood" a waxy additive that improves the weathering ability of the poles. CCA treated poles can be painted or sealed for aesthetic purposes.

HAZARD CLASS

When ordering treated poles the customer should ensure that the correct treatment has been requested to ensure adequate protection against the degree of hazard that the product will be exposed to when in service. This will ensure maximum service life of the product. The different hazard classes are:
H2 - Interior use eg. Roof trusses and beams
H3 – Exterior above ground eg. fencing rails and droppers
H4 – Exterior in ground eg. Fencing and Transmission lines
H5 – Fresh water contact eg. In flood irrigation or marshland
H6 – Marine water contact eg. Jetties and boardwalks

FINAL INSPECTION

After treatment a final quality control is done where poles are checked for adequate preservative penetration, and other defects before getting SABS compliance labels. The poles are now ready for despatch.


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