Автор: Ana Marija Stamenkoska
Статии
- PROCESSING SAWLOGS INTO PARQUET BLANKS
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Резюме
The term parquet refers to a floor covering made of solid wood, consisting of interconnected slats in a horizontal plane. A parquet strip is the principal constructional element of the parquet. This wooden strip is obtained as a result of processing the flooring blank. In the sawmill processing of the sawlogs, the flooring blanks are sawn from the sawlogs, mostly in the radial and tangential direction. For such a purpose, sawlogs from domestic species and foreign species are used. Most dominant in this manner are the hardwood species, although softwood species can be used too. Among the domestic species, the most are beech, oak, acacia, elm, ash, and from the softwood species pine and larch.
The paper focuses on the maximum quantitative yield of beech and oak sawlogs intended for processing into parquet blanks. The sawing was conducted on a bandsaw. The blanks were with a thickness of 25,0 mm. The sawlogs belonged to the I, II, and III quality classes. A total of 12 sawlogs were processed, 6 from beech (Fagus sylvatica L.) and 6 from oak (Quercus robur). All sawlogs were with a constant length of 3,0 m. The mean diameter for beech and oak sawlogs was in the range of 34,0 to 36,0 cm.
The average value for the quantitative yield for beech sawlogs from I, II, and III quality classes was 37.90%. For the oak sawlogs from I, II, and III quality classes the average value of the quantitative yield was 39.40%.Ключови думи: beech, oak, sawlogs, maximum quantitative yield, quality class, parquet blanks
- ANALYSIS OF DIAMETER TAPER IN FIR (ABIES ALBA Mill.) AND SPRUCE (PICEA ABIES L.) SAWLOGS FROM 1ST AND 2ND QUALITY CLASS
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Резюме
The success of sawmill capacities mainly depends on the rational use of raw materials, specifically the logs for sawing. The rational use of sawmill logs is primarily influenced by quantitative yield. The quantitative yield is a complex matter influenced by several parameters, with the main ones related to the sawmill logs. The key parameters include the diameter of the logs, their length, and the diameter taper. This study focuses on analyzing the diameter taper of fir (Abies alba Mill) and spruce (Picea abies L.) sawlogs from 1st and 2nd quality class. Taper, which represents the gradual reduction in log diameter from the base to the top. By examining 80 selected logs from the sawmill company in Berovo, Republic of North Macedonia, this study identifies patterns in taper rates across eight diameter groups. The results show the impact of taper on log utilization, highlighting the implications for sawing efficiency and wood quality.
Ключови думи: diameter taper, fir, spruce, log geometry, log volume, mean diameter, quality class, sawmill