Apparatus truss system attic

This is a rather complex structure, consisting of a frame bearing walls, ceiling and roof, so the construction of such facilities can not be charged amateurs. Before you begin to build a mansard roof truss system, you need to choose the optimal variant of the attic, based on the fact whether the attic of residential premises, or not. Its height is from 2.5 to 3.5 meters, truss system to be constructed at an angle of 30 to 60 degrees. Do not forget about the window opening, as the attic without windows will remain an ordinary attic with high roof. It is important to design the rafters so that they can withstand strong wind piles of snow, and of course, its own weight.

By selecting the material it is important to ensure that it is resistant to temperature changes and do not suffer from the high humidity. Most commonly used wood for the construction of the roof is best suited softwood. Also suitable laminated board, the use of which makes it easier to design. This material was originally treated with anti-corrosion agent, while the other timber is necessary to further process on the spot. Mansard roof truss system, you can also make use of a light metal, but it is quite an expensive option, though more durable.

There are several basic types of a mansard roof, with different types of structures:

Gable roof consists, as the name implies, two rays, at equal angles diverging in different directions.
Polyline attic consists of two broken rays.
The basis of hip structure includes two ramp trapezoidal and two triangular ramp form. Some are located along the long side of the roof, and the latter on the short.
Dome diagram attic used on round or polygonal homes.
The vaulted loft is built in the shape of an arc or a parabola, which is ideal for large rectangular houses.

To the future and attic truss system beneath it were the most reliable, it is necessary to carefully select the material. All boards and boards must be perfectly dried, sanded, and should not contain knots. The role bindings are corners, metal brackets and plates.