97 5. VARIABILITY IN THE MECHANICAL PROPERTIES FOR REGROWTH AND PLANTATION BLACKBUTT TIMBER IN NEW SOUTH WALES AND EVALUATING THE DISTRIBUTION OF THE TIMBER PROPERTIES 5.1 Overview The variabilities in the mechanical properties for regrowth and plantation blackbutt timber, both in the timber’s green and dried states, have been investigated in this chapter. The shrinkage behaviour was measured, ...

BACKGROUND Local timber is still one of the main sources of work and income for mountain communities. However, illegal logging is a major cause of deforestation in many countries and has significant impacts on local communities and biodiversity. Techniques for tracing timber would provide a useful tool to protect local timber industries and contribute to the fight against illegal logging. Altho...

Introduction In normal times Great Britain imports all but 4 per cent. of the timber needed for her industrial requirements, chiefly from Canada, Scandinavia and the Baltic States, and forestry work in this country is carried on by the Forestry Commission and private owners, who do research and reafforestation, and clean up woodland areas. War with Germany, however, resulted in a rapid and cons...

The Amazon forest is being exploited for timber production. The harvest removes trees, used by sand flies as resting sites, and decreases the canopy, used as refuges by some hosts. The present study evaluated the impact of the timber harvest, the abundance of sand flies, and their trypanosomatid infection rates before and after selective logging. The study was accomplished in terra-firme produc...

The use of small-diameter timber in construction has been investigated. The aim of the work is to increase the use of the wood harvested in forest thinning in construction applications. The work has covered a wide range of aspects, from availability of the material to design of the structures. This publication summarizes the results in following areas: availability, dimensions and quality of co...

Perfect competition has long been the standard by which economists have judged the market’s ability to achieve an efficient social outcome. The competitive process, unfettered by the imperfections discussed below, forges an outcome in which goods and services are produced at their lowest possible cost, and market equilibrium is achieved at the point at which the cost of the last unit supplied j...

One of the goals that the Innovative Bridge Research and Construction (IRBC) program, sponsored by the Federal Highway Administration (FHWA), wishes to achieve through sponsored research projects is the concept of an economical, durable, short-span bridge that reduces construction time. Delaware County, Iowa took a step in that direction through the construction of a 64 ft. long bridge comprise...

Turbidity regimes vary dramatically among small streams in north coastal California. In an analysis of turbidity data from 27 small streams in the region, turbidity at the 10-percent exceedence level ranged from 3 to 116 formazin nephelometric units (FNU) for the 2005 wet season, translating to 1.7 to 65 days above an oft-cited biological threshold of 25 FNU. Watersheds draining to the streams ...

The World Bank estimates the value of the global illegal timber trade at more than $10 billion per year. Tracking the timber supply chain is poor and allows widespread illegal logging, log smuggling and log laundering, it believes. Timber taken from remote forests in Asia, Russia, South America and Africa is often shipped long distances and its only certification is a paper trail that is highly...

Timber building has gained more and more attention worldwide due to it being a generic renewable material and having low environmental impact. It is widely accepted that the use of timber may be able to reduce the embodied energy of a building. However, the development of timber buildings in China is not as rapid as in some other countries. This may be because of the limitations of building reg...