What kind of roof to choose

Naslonnye rafters - is essentially resembling the beams overlap elements but set obliquely at different heights support, rather than horizontally.Supports for them at the pent roof is two exterior walls, in the gable - the outer and inner walls.It is necessary to note one more important feature: rafters opposite roof slopes can rely on the ridge pole alternately, that is, it is not necessary to mount them on the same plane.Emphasis naslonnyh rafters ends falls on the walls of the building, and the average part - on the intermediate supports.Arrange naslonnye rafters when the distance between supports 6.5 m no longer Additional support makes it possible to increase the width of the overlap naslonnymi rafters up to 12 m, and two supports -.. Up to 15 m

Prop hanging rafters only have to meet on the walls of the building.

They transmit only vertical pressure on mauerlat unlike naslonnyh.Hanging rafters are used when a roof span of 7-12 m and no additional support.Hanging rafters satisfied in most cases in buildings having walls lungs, as well as in buildings where there are no internal supporting walls.

basic elements of hanging rafters presented rafter and tightening the lower belt.

Choice roof structure

If you choose the roof structure with hanging rafters, in this case, all elements must be connected rigidly, as they provide a single structure, namely based on two extreme support roof trusses.Due to the lack of secondary support rafters abut each other in the ridge, resulting in a significant horizontal pressure, called spacers.In that case, if the roof is properly constructed, the walls may even capsize.The task of damping the horizontal pressure is on tightening - the lower belt of the truss.

Selection of construction and classification of the roof due to the specific conditions.For example, naslonnye rafters have a simple device and does not require during installation hoist.Farms with hanging rafters can be assembled on the ground, but in this case, it becomes problematic to construct their ascent to the structure.However, using the boardwalk, support struts, grouting of the boards can be mounted directly to the farm house.

The wooden bruschatyh and chopped building support rafters are upper crowns in the frame structures - on top of the harness.

The houses, made of stone, is used as a mauerlat boards having a thickness of 140-160 mm as for the rafter support.

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mauerlat can have the entire length of the building or to enclose only a truss leg.

If rafters small width in cross-section, they can sag over time.To avoid this, it is necessary to use a special, consisting of rack, struts and beams, lattice.

On performance struts and braces fit board, having a width of 150 mm and a thickness of 25 mm, as well as derived from logs with a diameter at least 130 mm wooden plate.

to fix rafter foot, use puff.Rafter end when sliding on tightening may damage its integrity.To prevent skidding truss recommend cut in the leg in the tightening of spike tooth or both that and another.

In addition, it is recommended to install the rafters at a distance of 300-400 mm from the edge.When vrubanii feet at the end of tightening is necessary to move the tooth as much as possible.

double tooth should be used, if necessary reinforced fixing rafters.

In most cases, teeth are used with different values: the height of one tooth - 0.2 Tightening the thickness and the height of another - 0.3.You must pre-emphasis and a thorn in the eye and tightening the rafters (for the first tooth).For the second tooth is enough for one stop.

In order to further secure the rafters in the puffs, use clamps and bolts.Last used less often as lead to the weakening of the cross section of rafters and puffs.

completes the installation steps are the construction of the skate frame roof eaves trim (serving at 40-50 cm in the free part of the wall rafter level), the erection of gable walls and mount made of boards or bars crates.

K is ridged mauerlat node and run using large nails attached clamps of the steel strip or wire having a diameter of 5-6 mm, perform twisting.

to perform in a difficult ridge strut connection node to the reception must be prodolbit rack jack and cut down to the buckled spike.To enhance the strength of the bond should be further strengthened with bolts and clamps.

to connect rafters with a bolt, apply dovetail notching vpoldereva.The strength of connection gives its fixing bolt or bracket Nagel.

The main purpose of the roof - the protection of building walls from the adverse effects of snow and rain, and therefore the length of the eaves should be at least 550 mm.

ends of the rafters are attached to the wall in the manner described below.Screed-harness worn on the rafter-tightening knot, and the second end is delayed or a beam attic floor, or on or driven into the stone masonry at a distance of about 30 cm from the top edge of the wall crutch.Otherwise, the screed tow-called twist and is a piece of thick wire, preferably galvanized.The wooden log homes, instead of stranding more appropriate use of iron clamps designed to connect rafters with a second crown of the framework.

One end reinforced rafters naslonnyh rafters attached to the outer wall of the building, the other - to the precast concrete beams, which support the columns of bricks.

portal for apartment repair on their own.