摘要
依照GB 50005-2003《木结构设计规范》规格材目测分等规则,对3种尺寸的兴安落叶松规格材进行目测分等,并分析降等缺陷。结果表明:不同尺寸规格材的等级比例不同;节子、轮裂/干裂和漏刨是规格材主要的降等缺陷。建议优化落叶松规格材加工方法,进一步完善干燥工艺,减少裂纹等缺陷,提高规格材加工质量和使用价值。
Three groups of Dahurian larch （Larix gmelinii） dimension lumber with different dimensions of 40 mm × 65 mm × 4000 mm,40 mm × 90 mm× 4000 mm,and 40 mm × 140 mm× 4000 mm, were visually graded according to Chinese Standard GB 50005-2003. The main defect causes that degraded the lumber were identified for each group. The results showed that.1） different sizes of lumber differentiated in proportion to each grade of dimension lumber; 2） knots, shake/ checks and skips were the main defects that lowered the lumber grade. It was proposed that further study should be conducted toward optimizing processing and drying methods to improve the quality of dimension lumber.
出处
《木材工业》
北大核心
2010年第2期1-4,共4页
China Wood Industry
基金
"十一五"国家科技支撑计划项目(2006BAD18B07)
关键词
兴安落叶松
规格材
目测分等
缺陷
Dahurian larch
dimension lumber
visual grading
defect
