In order for the erected roof to be reliable, a very strong roof system is required, which is the supporting structure of the roof. Fastening the connections of individual elements affects both the safety of the roof and its characteristics. A prerequisite for a strong roof is the correct attachment of rafters to the mauerlat. If during the construction of the truss system to make mistakes, then in this case, everything can lead to early destruction of the roof of the house. That is why it is very important to follow the rules and requirements of SNiP, which regulate the arrangement of roofs.
Knots of fastening of rafter system.
Mauerlat is the so-called foundation for the construction of the roof. This is because it allows not only to securely fix the rafters, but to evenly distribute the weight of the whole structure around the perimeter of the walls of the building. Fastening rafters can be carried out using various methods, however, it should be borne in mind that if not properly installed, a distortion occurs.
Types of mounting rafters to the power plate.
The Mauerlat is mounted directly below the rafters themselves. To do this, use either a bar or a log with a cut side. Thus rafters to the mauerlat allow you to evenly distribute the load on the upper part of the walls of the house. In total, the attachment of rafters to the mauerlat performs 2 main functions: to withstand temporary and permanent loads. The seismic phenomena are temporary, and the constant pressure of the weight of the roofing structure is on the support.
In order to perform the mounting of rafters in a quality manner, it is necessary to acquire exclusively high-quality fastening units. All flashes should be very clear and tight to each other. In addition, you can not use a variety of substrates and pads. All this violates the attachment of rafters to the power plate. Such parts can be deformed and fall out of the overall structure due to large loads. All attachments of rafters to the power plate are performed exclusively with the help of metal plates, brackets, nails and bolts. Bolts and nuts require the presence of washers. Such elements will allow the nuts not to crash into the wood of rafters and mauerlat.
The mounting scheme of the power plate to the wall of blocks.
There are only a few basic, very important rules for attaching rafters to a power plate, the failure to comply with which may lead to early destruction or misalignment of the roof. Here are the main ones:
All fasteners must be very durable in order to withstand even the strongest wind loads. Otherwise, it will be able to tear down the roof.
Attachment of rafters to the power plate.
Total exists two basic methods of fastening: rigid and sliding.
Hard - such fasteners of rafters to the power plate are required when inclined rafters are fastened, since If this happens, the leg very tightly seated on the basis for this type of attachment should not be provided to any effort:. moving, twisting, turning, etc...To achieve this effect, you can do one of the following:
In order to cut the cutter to the mauerlat, you must first cut the cutout on each truss foot using a template. Then each rafter is inserted into the mauerlat with a saddle and fastened with nails. This method is used in any construction and provides a rigid connection.
As for the second method, its implementation is carried out with the help of a meter bar, which is stitched to the truss leg. Metal corners are used for fastening, which prevent the lines from moving in different directions.
Sliding - such fastenings are used in cases when a house is built from a bar or log, in other words, when a house is made of wood. Subsequently, the tree changes its physical properties, and it begins to shrink and dry. The whole structure of the building begins to settle. Rafters also tend to shrink, so in this case it is not possible to make solid fasteners.
In order to prevent deformation of the building, the attachment of rafters is provided with free movement.
Today, manufacturers of fasteners produce special elements for this purpose, called skids. In addition, metal corners with oblong holes for fasteners can be used.
The mounting scheme of the power plate to the armored belt.
A total of three main methods are used:
With the help of the sequential installation scheme described below, it will be possible to fix the rafters to the power plate. Sequence:
The studs are used for the connection: for Ondulin - with a diameter of 8 mm, for a cement-sandy roof - 10-12 mm.
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