Radiata Pine is extremely easy to season and can be kiln-dried rapidly from green. Material from near the pith is prone to twist, cut twisting can be minimised by good stacking and restraint. Timber that is pressure treated with waterborne preservatives using the Bethell (Full-Cell) process redries slowly.
Logs are debarked using any of the three large de-barkers and proceed from here to the various finishing machines i.e. pole peeler, Bezner rounding machine, Saw mill etc. (depending on the end product required). Our machining division can process a range of popular profiles from semi round rails to tongue and groove interlocking timbers. We also have a machine stress grader and proof tester enabling us to produce in accordance with the new structurally verified timber standards.
Croftpoles are CCA (Copper Chromium Arsenate) treated to the level of Hazard Class 5 (H5) for critical end use situations. Results have shown that poles treated appropriately will have expected average service lives in excess of fifty years. Durability monitoring to date has shown that best results have been achieved with pine poles treated with either CCA or Pentachlorophenol (PCP) oil, however there are economic and environmental disadvantages associated with PCP.
Croft Timber Co Ltd first started producing wooden poles in 1971 when the first treatment plant was installed and wooden poles were seasoned by using the sun to dry poles in preparation for pressure treating.As demand increased, the need for steam conditioning was intensified so the first steam plant was commissioned in 1985 followed by a new and larger treatment plant the following year, increasing the capacity to about 1400m3 per month.At the same time, a new debarker was installed.
NZ scientists, technicians and forest professionals have accumulated more in-depth knowledge of New Zealand pines (Pinus radiata) than any other country.
In a world where many traditional sources of industrial wood have been depleted or are declining, New Zealand is gaining international recognition as a supplier of a sustainable and expanding resource of high quality wood.
As with most softwoods, New Zealand pine is not a naturally durable species and its use in New Zealand for structural purposes has gone hand-in-hand with the development of an efficient wood preservation industry.
Unlike many traditional softwoods the sapwood of New Zealand pine is very permeable to wood preservatives, particularly in the radial direction. Complete penetration of the sapwood is always achievable, resulting in very extensive service lives for such commodities as electric power or telecommunications transmission poles, marina poles, ground retention etc. Such total penetration with preservatives is rarely achieved with other softwood species.
The quality of plantation-grown trees is influenced by genetic selection, silvicultural practice, site selection and rotation age. Over the last 60 years there have been many changes in forestry practices which have resulted in greater control over the type of wood produced.
Find out more about of range of Croft Poles New Zealand pine products
Croft Poles History
A family-owned business for over 100 years, you can depend on Croft Poles products.
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