Abstract
In
the article
results of the complex researches, shown with the purpose of
development of
requirements to quality of bars wood for building designs are given.
The
parameters providing set strength characteristics bars building
elements of
bearing building designs at various kinds under intense-deformed
condition are
defined. Quantitative estimations of strength characteristics of bars
from
fur-tree wood of and pine of the North European part of Russia are
received. Regression models
analysis of connection parameters of bars strength with parameters of a
total
knots volume of destruction area has allowed establish quantitative
connection
which was base for calculation of specifications of a total knots
volume providing
bars strength with sufficient reliability. Outputs of bars sorted in
accordance
with current requirements are compared with saw-timbers wood for
building
designs and under standards of knots destruction area. From researches
results may conclude that application of total volume knots norms of
destruction area for estimation of bars durability has raised
reliability of
control and expanded resources of bars for building designs.
Key words: сonstructional
bars
wood, strength characteristics, combined volume of knots
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