Wood has been successfully used as a bridge material for thousands of years, but before the early 1900’s most structures were built of untreated timber. Protection from decay and deterioration was afforded by using the heartwood of naturally durable species or by covering the structure to protect it from weathering. Although many bridges constructed of un­ treated timber performed well (some la...

Haynes, Richard W. 2008. Emergent lessons from a century of experience with Pacific Northwest timber markets. Gen. Tech. Rep. PNW-GTR-747. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 45 p. Timber markets in the United States are areas where timber prices tend to be uniform because of the continuous interactions of buyers and sellers. These m...

Portable sawmilling trials with Acacia aneura (mulga) and A. cambagei (gidgee) have been undertaken to estimate the private landholder costs associated with small-scale timber production from woodlands in western Queensland, Australia. A time study of harvesting and milling operations facilitated estimation of landholder labour input requirements. The scarcity and small size of millable logs, c...

To determine the potential of a low cost Irish engineered timber product to replace high cost solid timber for use in bending active structures such as gridshells a single Irish engineered timber product in the form of orientated strand board (OSB) was selected. A comparative study of OSB and solid timber was carried out to determine the optimum properties that make a material suitable for use ...

The authors acknowledge helpful comments from seminar participants at the University of California-Davis and the 2001 American Agricultural Economics Association meeting, where earlier versions of this paper were presented. Abstract: The problem of when to optimally harvest trees when timber prices evolve according to an exogenous stochastic process has been studied extensively in recent decade...

Bair, Lucas S.; Alig, Ralph J. 2006. Regional cost information for private timberland conversion and management. Gen. Tech. Rep. PNW-GTR-684. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 26 p. Costs of private timber management practices in the contiguous United States are identified, and their relationship to timber production in general is ...

Forest environmental conditions are affected by climate change, but investments in forest environmental quality can be used as part of the climate change mitigation strategy. A key question involving the potential use of forests to store more carbon as part of climate change mitigation is the impact of forest investments on the timing and quantity of forest volumes that affect carbon storage. U...

This paper presents a numerical investigation on the influence of different types of damage to the load capacity of in-service timber utility poles. Current design codes do not highlight a pole’s strength performance due to different types of damage. However, damages typically found in ageing timber poles, such as damage due to fungus or termite attack, have very different characteristics and r...

Timber market and forest product market are linked and integrated through prices of their own. In this study, the presence of price transmission asymmetry is investigated for wood products sector in southern United States. Threshold cointegration and an asymmetric error correction model are employed to analyze the price dynamics between prices of standing timber, delivered timber and also two r...

For the design of steel and concrete structures, most modern international design codes allow the use of plastic stressstrain-diagrams for the analysis of the bending resistance of the cross-section in the ultimate limit state. Curiously, in Europe and most other parts of the world, timber structures are still designed for the ultimate limit state with the old, conservative concept of full elas...