Module building from profiled beams - material shrinkage

The installation of profiled beams, like other structures from the material presented, shrinks. Experienced masters are able to determine in advance the nature of this effect. However, only a few experts can say with certainty, what will be the shrinkage of the profiled beam in concrete conditions. Let's try to understand the question.

What does shrinkage suggest?

Under shrinkage is to understand, first of all, systematic loss of wood moisture. A characteristic feature of the process is the change in the parameters of the construction basis. The material becomes lighter, decreases in volume, which often leads to its deformation and, accordingly, may affect the stability of the wooden cabins.

The cost of profiled beams on the domestic market is from 7000 to 10,000 rubles per cubic meter. When choosing a high-quality material in the worst case, there will be shrinkage, which is a fraction of a centimeter. The use of frankly cheap timber can lead to the most unintended consequences.

What does this effect depend on?

The extent to which the shed from the profiled bar will sink depends on a number of objective factors, in particular on the quality of processing, the technology of timber storage.

Shrinkage occurs in several stages. The intensive period is about 3 months. Gradual - about a year. Several factors affect the process flow:

• Section of the beam.
• Dimensions, which differ in construction site cabins.
• The degree of moisture in the material (wood harvested in winter is less natural moisture).
• The technique of assembly of building structures (the nature of the angular joints, the type and reliability of fasteners).
• The type of wood on the basis of which a shed is built from profiled beams (dense rocks give less shrinkage).
• The time of year when the assembly of the structure is being performed.

How does the seasonality of work affect shrinkage?

How much will the shed from profiled beams sink? The decisive role here is played by the seasonality of the work. The facilities, which are being built in the winter, require waiting for about six months before the facility is put into operation. This is due to the necessity of "accustoming" the wood to a gradual increase in the temperature of the environment. In this case, the material evenly dries and slowly warms up.

Cardinally changes the business of building a cabins in the summer. In such a case, it may take a year or more to fully shrink the material. During this period of time the structure manages to survive all seasonal changes.

Of particular importance is the location of construction cabins from profiled beams. Often the cause of uneven shrinkage of the material is the finding of one part of the structure in the shade, while the other side remains in the zone of direct exposure to the sun's rays.

In addition, the cabins can be blown out in different ways by the wind. Individual parts of the structure are exposed to a separate amount of precipitation, which also affects the nature and speed of subsidence of the material.

What can you expect if you do not foresee the shrinkage effect?

Reflection of the effect on the characteristics of the structure is calculated even before the beginning of the roofing work, the installation of windows and doors. If we take as an example a private house with 18 sections with a section of the order of 150x150 mm, during the year the structure settles by about 10 cm. Without taking this into account when constructing a cab from a profiled beam, premature start of operation can lead to a distortion of the door and window openings. Therefore, before assembling the structures it is extremely important to make exact calculations and leave the necessary clearances.

The most damaging effect of shrinkage will be, if the shed has an internal and external finish. Elements of the latter can break and even tear.

To mitigate the negative effects allows sludge walls using a special kyanki. The use of the tool minimizes the docking slots and does not damage the surface. The correct solution is also the laying of a quality interventure heat-insulating material. The optimal option for a profiled beam is the jute insulation, which has a minimal effect of crimping.

When installing door and window structures, it is enough to calculate and leave technical clearances. Such apertures are made in the upper part of the frames, and their width is about 2 cm. If necessary, the gaps can be hidden by installing the platbands.

Eventually

The most accurate estimate of the degree of shrinkage of the profiled beam during the construction of a cabins or wooden houses is possible by the manufacturer of the material. The calculations will be even more verified if the supplier takes a direct part in the execution of the work.