The spruce is more often used than bread tree (Artocarpus altilis) said the people who work in the timber industry. It`s very productive – transport on wooden pallets, wooden products, timber and also used for manufacture pianos. The spruce is very light (410 kg/m3 Compression strength) and soft (hardness 12N/mm2).
Botanical Name: Picea abies
Is very easy to handle, strong and elastic enough. The spruce dries quickly, the color is white-yellow and closed by the explore to light. It is also very durable. The annual rings of spruce wood that form the marrow, sapwood and heartwood are very visible. Pine is also known as red spruce. The romans, celts and germans decorated in the past their homes with pine branches to drive away the bad spirits and to attract the good spirits.
Technical characteristics:
Gross density: 0,43 g/cm3
Brinell hardness: 12N/mm2
Tangential: 0,27-0,36
Bending strength: 68 N/mm2
Compressive strength: 40 N/mm2
Tensile strength: 80 N/mm2
Calorific value: 20,2 MJ/kg.
Source: http://www.holz-portal.ch |
