Results 21 to 30 of about 838,576 (264)

Dimensional and qualitative structure of Quercus robur L. trunks in stands of coppice origin of the Left-Bank Forest-Steppe of Ukraine

Наукові праці Лісівничої академії наук України, 2021
One of the important tasks of the production activity of forestry enterprises in Ukraine is to determine the structure of operational forests. In the current conditions, part of the regulatory framework, which was developed in previous years to address ...
Volodymyr P. Pasternak , Olexandr A. Slysh , Vitalii V. Nazarenko   +2 more
doaj   +1 more source

Emprego de ferramentas numéricas na avaliação do módulo de elasticidade em vigas roliças de madeira Use of numerical tools in the evaluation of the longitudinal modulus of elasticity in round timber beams

Engenharia Agrícola, 2012
Vigas são elementos estruturais encontrados na maioria das construções civis. Dentre os materiais de engenharia, destaca-se a madeira, por ter resistência mecânica satisfatória aliada a baixa densidade.
André L. Christoforo, André L. Zangiácomo, Túlio H. Panzera, Márcio E. Silveira, Francisco A. R. Lahr   +4 more
doaj   +1 more source

LOW-COST TIMBER BRIDGES FOR RURAL AREAS: A FIELD SURVEY AND RECOMMENDATIONS OF INTEREST [PDF]

Engenharia Agrícola
Timber bridges in Brazil, intended for rural roads and rural areas, present several problems due to the lack of design, structural calculation, and periodic maintenance by municipal administrations.
Tayla C. Criado, Amauri da S. Ribas Junior, Julio C. Molina   +2 more
doaj   +1 more source

Wood trade perspectives in greece during economic crisis and and new technologies challenge [PDF]

, 2015
In wood trade sector, the supplier is the forest and the product is round wood. The quality, the quantity and value of wood depend heavily on the practices that are applied in the early stages of the supply chain.
Andreopoulou, Zacharoula, Trigkas, Marios, Tsekouropoulos, Georgis, Tzoulis, Ioakeim, Voulgaridis, Elias   +4 more
core   +1 more source

Numerical evaluation of the modulus of longitudinal elasticity in structural round timber elements of the Eucalyptus genus Avaliação numérica do módulo de elasticidade longitudinal em peças roliças estruturais de madeira do gênero Eucalyptus

Engenharia Agrícola, 2011
Currently, the standards that deal with the determination of the properties of rigidity and strength for structural round timber elements do not take in consideration in their calculations and mathematical models the influence of the existing ...
André L. Christoforo, Túlio H. Panzera, Fabiano B. Batista, Paulo H. R. Borges, Francisco A. R. Lahr   +4 more
doaj   +1 more source

Effects of Loaded End Distance and Moisture Content on the Behavior of Bolted Connections in Squared and Round Timber Subjected to Tension Parallel to the Grain

Materials, 2020
This article presents the results of static tests on bolted connections in squared and round timber with inserted steel plates. The experiment evaluates structural timber connections with different distances between the fastener and the loaded end at ...
A. Lokaj, P. Dobeš, O. Sucharda
semanticscholar   +1 more source

Deformations during drying of wooden corner elements of I-beams

Magazine of Civil Engineering, 2020
At present, environmental degradation is occurring, which affects forests. Increasingly, in the trunks of conifers there is core (sound) rot. Round timber with sound rot is left in the forest, which does not contribute to improving the environmental ...
Aleksandr Toropov, Viktor Byzov, Vladimir Melekhov   +2 more
doaj   +1 more source

An Assessment of the Carbon Footprint of Tropical Hardwood Sawn Timber Production

BioResources, 2015
The demand for sawn timber throughout the world is steady, as wood is one of the most important raw materials available to mankind. Yet, the production of sawn timber through sawmilling activities causes environmental issues and is perceived to have a ...
Jegatheswaran Ratnasingam, Geetha Ramasamy, Weiching Toong, Abdul Latib Senin, Mohd Ashadie Kusno, Neelakandan Muttiah   +5 more
doaj   +1 more source

Detection Method for Bolted Connection Looseness at Small Angles of Timber Structures based on Deep Learning

Sensors, 2021
Bolted connections are widely used in timber structures. Bolt looseness is one of the most important factors leading to structural failure. At present, most of the detection methods for bolt looseness do not achieve a good balance between cost and ...
Yabin Yu, Ying Liu, Jiawei Chen, Dong Jiang, Zilong Zhuang, Xiaoli Wu   +5 more
doaj   +1 more source

Impact bending strength of Finnish tree species in green condition

Silva Fennica, 1985
There are great impact forces in mechanized harvesting and wood yard in the mills which can cause breaks in timber. The impact strength of timber in green condition was tested in temperatures of +18°C and -18°C using sawn pieces (20 x 20 x 300 mm) of ...
Kärkkäinen, Matti, Pietilä, Jukka, Vihola, Raili   +2 more
doaj   +1 more source