T. Kočetov Mišulić, Aleksandra Radujković, Zdravko Popović, Ksenija Hiel
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引用次数: 0
Abstract
Classification of timber for various commercial purposes is essential for its proper application in order to ensure the reliability and economic use. Visual grading of structural timber is commonly used in a number of EU countries, with different grading national standards optimized for locally available wood. Countries in the ex-YU region are traditional partners in wood trade and had the same standards for visual grading, but in most of the regions these standards are not completely compliant with EN requirements. Consequently, that leads to the fact that the most of regionally available structural timber is not assigned into strength classes, which is the starting point for the limit-state concept in design of timber structures. The aim of this paper is to emphasize the lack of strength classification of structural timber in the ex-YU region, which is a prerequisite for the design of timber structures made by civil engineers. Based on an overview of visual classification types with regional experience in grading, relevant EN standards, and differences in design concepts with possible consequences of grading approach, it can be concluded that “quality” grades and “strength” classes are not easily comparable.
为确保木材的可靠性和经济性,对各种商业用途的木材进行分级对其正确应用至关重要。结构木材的目测分级在许多欧盟国家得到了普遍使用,并针对当地现有的木材优化了不同的分级国家标准。前欧盟地区的国家是木材贸易的传统合作伙伴,拥有相同的目视分级标准,但在大多数地区,这些标准并不完全符合 EN 要求。因此,这导致该地区大部分可用的结构木材没有划分强度等级,而强度等级是木结构设计中极限状态概念的起点。本文旨在强调前乌克兰地区缺乏结构木材强度分类的问题,这是土木工程师进行木结构设计的先决条件。根据对地区分级经验的视觉分级类型、相关 EN 标准以及分级方法可能导致的设计概念差异的概述,可以得出结论:"质量 "等级和 "强度 "等级不易比较。
期刊介绍:
"Drvna industrija" ("Wood Industry") journal publishes original scientific and review papers, short notes, professional papers, conference papers, reports, professional information, bibliographical and survey articles and general notes relating to the forestry exploitation, biology, chemistry, physics and technology of wood, pulp and paper and wood components, including production, management and marketing aspects in the woodworking industry.