There is one winged expression: “flew like a plywood over Paris”. It is this expression that probably most fully characterizes the sphere of use of plywood, since the scope of its application is not limited to the creation of furniture or in repair and construction work. The former were built from it and the last aircraft continue to be built.
However, aircraft uses a special very thin aircraft plywood aircraft. And we will talk about the faner we often deal with is the veneer.
Plywood has a thickness of 3 -32 mm. It also has a multi -layer structure, since it consists of thin, glued wood sheets, that is, veneer. For such sheets, coniferous and deciduous trees are used. There is a tinted and natural veneer. Natural veneer is better.
Before buying a plywood in St. Petersburg, you should look at its certificate. The scope of this category of plywood should be indicated there. However, if you do not strive to build a plane with your own hands, then the usual construction plywood will suit you, which can be found in any building materials store.
The best will be plywood made of coniferous rocks. Moreover, if its fibers are talked, and not by a transverse cut, then such plywood has greater strength, but it is true that it is more expensive. Actually, the presence of knots is still important here. Depending on the location of the fibers and knots, the plywood is divided into 4 grades. If there are no knots and the structure is almost uniform, then this is 1 variety. If the structure is fibrous enough, then this is the second variety. If the faner has a small number of knots, then this is 3 variety. If the sheet is simply full of bitch, then this is 4 variety.
It is also necessary to pay attention to the water resistance of plywood: the highest indicator is the FSF, the average indicator is the FBA, the low indicator is FC (ordinary plywood). The higher the variety, the more expensive the plywood.
The thickness of the plywood depends on the case in which it is used. For example, 6 mm-for floor screed is suitable, and for lining walls of the house 9-12 mm. The thicker the plywood sheet, the more expensive it is.
The cost of plywood also depends on the quality of its surface. The rough plywood is used for internal work, and smooth mainly for painting.
These instructions will help you not only choose the right plywood, but will also give you the opportunity not to be deceived by others, since often 4 varieties can be given to the plywood for 2 or 3.