Fastening of rafters to mauerlatu

Roofing, parts, fasteners.

An important element of the roof construction is the Mauerlat. The support beams of the truss are not installed directly on the walls. The installation of the beams of the roof is made on the base of the supporting bar - Mauerlat. He can be whole. Mauerlat is laid exactly along the perimeter under the rafters. Used logs( with a cut off sideways), beams, boards. With its help, the weight of the roof is evenly distributed rationally over the structure. To it the rafters join.

Mauerlat. The dominant purpose of rafters( layered, hanging) is to transfer loads from the roof to the side supports - walls. A large support area for the rafters will ensure the correct transfer of these loads. Serious stresses are permanent, temporary, extraordinary. The temporary include maintenance equipment, working builders, snow, wind. Special( extreme) loads are seismic impacts. Constant - the weight of the roof structure.

All connecting details for rafters, mauerlat are selected carefully - quality, reliable parts are needed. Saws should be made clearly, fit snugly. Excludes the use of any pads, substrates. In time, these elements can undoubtedly fall out, deform. Fastenings rafters of a roof make with application of plates( metal), special corners, arms, nails, bolts. They are on sale abound. For bolts, nuts are mandatory washers, metal plates. They will successfully prevent the "dipping" of the nut into the wood. For the lining instead of the plates the pieces of plywood will completely come off.

How to attach the rafters

The working moment of fastening the rafters is very important when installing the roof. Undoubtedly, the state( "behavior") of the roof depends on the way in which the supporting beams are connected to the Mauerlate in different weather conditions. For example, with temperature changes, snow blockage, wind. The connection is made by two methods: rigid, sliding. Here the shape of the roof is important, the model of the rafters being installed. Also see about armopoyas under Mauerlat.

The tree, no doubt, expands from moisture. At high temperature - it contracts. Therefore, the roof structure will not be static( ie movable).Here the rigid method of fastening should be excluded. There is a danger of displacements, even breaks. Incorrect installation can provoke the appearance of spacer force. Its action on the walls is dangerous. Therefore, the correct securing of the rafters is a guarantee of safety.

Rigid fastening of rafters to

Mauer The main principle of this fastening technology is the rafters - excluding any influences on the connection of elements. Bends, turns, shifts are not permissible. Such staticity is achieved by making fastenings by means of corners, support bars. The connection can also be made by making cuts on rafters, staples, driving nails.

In the first case, the beams will be supported by a Mauerlat equipped with a hem support block. A one-meter bar provides a rigid abutment of the beam. In addition, you can fix the beam from the sides with metal corners. This excludes lateral displacements.

The second method is more popular. When clogging the side nails( for fastening), given a certain bias. Inside the canvas, they must be crossed. Further one more nail is vertically hammered from above. As a result, a rigid knot is assembled, fastening the beam with the Mauerlate.

With both versions the rafters are still fastened with wire, anchors to the wall.

Sliding mount

A similar fastening is often called a hinge. There are two degrees of freedom. Fixing models are implemented, allowing an unobstructed displacement of any element. In this design, the moving part is the rafters. This type of fastening of supporting beams is made by various methods.

• Special trick is made on the rafter. This part of the rafters fit into the Mauerlat. The clutch should be secured with two nails. It should be remembered: they are hammered at an angle. You can fix the details with one nail, hammered vertically. He punches the rafters, piercing the Mauerlat. Another often used metal plate, equipped with holes for nails. The elements are sometimes stapled only by a bracket.
• The conclusion of the rafters behind the wall. Here, fixing plates( single clutch) are used.
• The connection is made by special fasteners( metal).This element is called "sled", it is widely used for rafters.

Each presented variant of fastening securely connects rafters with mauerlate. Even with small shifts in the roof structures, the constituent parts move relative to each other. It is known that sliding jointing in the construction of a roof is used more often. This technology is especially applicable in the creation of wooden structures, built from logs, timber. After a while, because of the shrinkage of the house, the geometry of the building changes a little. Therefore, with rigid joints, walls can collapse. Therefore, when erecting wooden structures, it is advisable to use sliding fastening. Such connections will help the log walls and the roof to gradually adjust to similar changes in proportions.

Rules for correct attachment of

1. Fastening of rafters with mauerlate is not an easy, important connection. The durability of the roof, the safety of the residents of the house, as is known, depend on the reliability of the clutch. Ensure a reliable connection is not easy. Error, illiterate actions in the construction of the roof are fraught with the descent of rafter feet, a skewed roof with a possible fall. In view of this, the supporting beams must be fastened to the Mauerlat with the observance of specific rules:
2. Undoubtedly, high-quality fasteners should be used. Here, savings are unacceptable, because unsuitable, poor-quality hardware do not contribute to the creation of a stable, durable roof. The cuts on the rafters must be carried out extremely accurately, precisely, in order to avoid the need to install any gaskets or liners. Such details will, of course, help to ensure a good connection. However, after a while they can deform, they can fall out. This will weaken the structure.
3. Rafters are more suitable to fix on metal corners, plates. They better stock up before starting the roof installation. Otherwise, you have to buy them during the installation. True, you can use other types of anchorages. But this will be a temporary measure. In this case, it is important to consider that the use of nails, self-tapping screws is the appropriate option for installing the beam. To create the same solid, durable construction, it is mandatory to use specially made rafters, bolted( hairpin) connections.
4. It is recommended when installing the roof of a wooden building to resort to a sliding mount. This technology is good for connecting with side logs, with Mauerlate. Special elements - skids - will provide an opportunity for unimpeded sliding rafters. Mobility of structures is a prerequisite.
5. The connection of the rafters must also be extremely durable. Before fixing the rafters in the Mauerlat, grooves are prepared - "saddles".They can provide a tight, tight fit of the elements. To create the created blanks were the same, apply the ready-made templates. If the skates are made at different angles, then these templates must be made for each separately. The depth of the saw should correspond to one-fourth the width of the rafter. Of course, you can work without using a template. Then it will be necessary to carry out additional measurements. You may also need to adjust during the installation.
6. The rafters must be installed in such a way to ensure stability, the strength of the roof in strong winds. We must simultaneously take care of the problem of a bursting force, which also has a strong impact.
7. The entire roofing system must first be constructed on the ground. This is the necessary preparation. All measurements are made, the necessary tie-ins are made in the mauerlate, the cuts on the rafter feet. In the end, everything is adjusted, installed in place. After one by one, the finished parts of the structure according to the developed technology are installed on the structure.

Video - fixing rafters to the Mauerlat