نتایج جستجو برای: joints timber
تعداد نتایج: 55530 فیلتر نتایج به سال:
Several papers have now estimated the impact of climate change on national timber markets, but few studies have measured impacts globally. Further, the literature on impacts has focused heavily on changes in productivity and has not integrated movements of biomes as well. Here, a dynamic model of ecological change and economic change is developed to capture the impact of climate change on world...
The study described in this contribution contains a fundamental strategy to select geometries for dry joint profiles 3D-printed concrete constructions. A database, here called the ‘joint catalogue’, variety of types adapted from timber, steel, and bionic connections. Weighting factors different criteria evaluate score various (e.g., manufacturability, duration manufacturing, mechanical behaviou...
one of the most visible aspects of a forest stand structure is the spatial patterns of trees. competition affects on forest structure and its understanding is important, when the purpose of forest management is to imitate the dynamic of natural ecosystems. for this purpose, an unmanaged intact forest was selected with 26 hectares area. all chestnut leaf oak (quercus castaneifolia) trees with a ...
A novel method for estimating ultimate clamp force in lag screw timber joints with steel side plates
Cross-laminated timber (CLT) is increasingly being used in lateral load resisting systems of multi-storey buildings. Conventional in-plane CLT shear walls can be transformed into core-wall structures with enhanced strength and stiffness when the individual are connected orthogonally. In this paper, experimental studies presented on orthogonal joints self-tapping screws (STS) installed mixed ang...
Throughout human history, slow-renewal biological resource populations have been predictably overexploited, often to the point of economic extinction. We assess whether and how this has occurred with timber resources in the Brazilian Amazon. The asynchronous advance of industrial-scale logging frontiers has left regional-scale forest landscapes with varying histories of logging. Initial harvest...
The FTM-West (“Fuel Treatment Market” model for U.S. West) is a dynamic partial market equilibrium model of regional softwood timber and wood product markets, designed to project future market impacts of expanded fuel treatment programs that remove trees to reduce fire hazard on forestlands in the U.S. West. The model solves sequentially the annual equilibria in wood markets over a historical p...
Combining protected areas with natural forest timber concessions may sustain larger forest landscapes than is possible via protected areas alone. However, the role of timber concessions in maintaining natural forest remains poorly characterized. An estimated 57% (303,525 km²) of Kalimantan's land area (532,100 km²) was covered by natural forest in 2000. About 14,212 km² (4.7%) had been cleared ...
The British Columbian Ministry of Forests proposed an auction design to achieve fair market prices for its standing timber. Because the Crown owns almost all the standing timber in British Columbia, the Ministry proposed to auction a portion of that timber, and use the auction prices to set stumpage rates for timber under long-term tenure. In this manner, the private industry, and not the Crown...
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