Using saw timbers, wood and other finishing materials.

September 22, 2007 on 2:09 am | In Business

After dying off of branches,
wood of a growing trunk continues to cover their bases.
After branches disappear, their bases acquire wood and in a peripheral zone of the trunk free wood from knots is formed.
The part of a trunk with adnate knots represents the cylinder which is passing on all height of a tree; the part of a trunk with dropping out knots represents the hollow cylinder which is passing from the ground up to the basis of an alive crone.
One -knot wood forms the external cylinder covering overgrown ends of branches. In trees of secondary forest stands zone of one-knot wood and a zone of wood with dropping out knots can be absent.
Wood of trees, died off owing to fires, damage by insects and mushrooms, can be suitable in an equal measure for any building purposes, as well as wood of growing trees, if only it has not suffered from the further damage by insects, bed color mushrooms and has not got defects of drying. By consideration of this question it is useful to remind that heartwood of growing tree completely is dead and in sapwood vividly rather a small amount of cells. Hence, the most part of wood during the moment of cabin is dead irrespective of, vividly tree or not. However if the tree after dying off remains on a root during long time, it sapwood, and in due course heartwood can decay or undergo to an attack of insects. Similar decrease in quality occurs at the logs prepared from growing trees, but insufficiently protected at storage. Owing to distinctions in climatic both local weather conditions and actions of some other factors influencing decrease of quality, duration of the period during which the dead tree can stand on a root or lays in a wood without serious deterioration of its quality, happens various.
At buck, logs saw-timbers of various quality turn out. Them sort so that within the limits of one grade all saw-timbers were about one quality. Sorting of saw-timbers, except for specified below cases, is based on the account of number, character and a site of defects which can lower durability, service life or suitability of wood.
The science about building materials and finishing materials on a stage of development includes not only the sum of an extending knowledge, but also a complex of different positions, principles, laws, concepts about materials in concrete, and is abstract-logic forms.
Here you can read about different building materials and finishing agent for various types of building and paper finishing for your house: brick facing in assortment; asphalt; artificial decorative stone; wood; natural stone steps; planch ; concrete.