Gable roof rafters and splicing of different configurations

Ridge merging of the rafters and the existing ways of doing this operation, we have considered in the preceding article. However, in roofs of different splice forms it has certain characteristics. Here are some of them and discussed today.

Gable roof

Bevelled ends pitched roof rafters can be located on the ridge butt or placed on it vrazbezhku. However, the following conditions must be satisfied necessarily with any technology:

If laying the rafters of the ridge is made in the Extension, they are joined with bolts and staples.
When rafters stacked end to end, their connection should be provided via pads, strengthened by nails or bolts.
When the rafters are supported at the same time for a couple of runs, the ends should be mutually to rest. The tension can be removed by installing horizontal crossbars.
If the run is not present, the rafters are joined by their bevels, which provide additional bonding pads pair, strengthens nails or bolts.
Securing bolt on the side rafters made of wood plates, are fixed with nails or bolts. Under the bolt should put the shoe, a receiving transverse forces.

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Log rafters are fastened with bolt without overlap, but on the tip of deadbolt performed notch value in half section Sprengel. For the stability of the rafter should be reinforced infeed bolts and braces. This is especially important if the distance between the outer wall exceeds 8m.
Roofing horse should be protected from displacement, if the house is located in an area where strong winds blow constantly. To this end, the ends of the rafters naslonnyh must additionally be secured on the ridge brackets. Rafters should be linked to the house masonry using wire.
Box is not recommended in the rafters, truss system if exposed to severe stress, and should use the intermediate gusset.

The following information is presented in more detail:

If the roof is very steep, the greatest strength should have a horizontal structure. If it is flat, it is necessary to pay special attention to the strength of the vertical elements, available as part roof system.

hip roof

Scenario splice rafters these roofs is quite different, because there are new design details - nakosnye rafters, putting, following a specific technology. On the ridge parts are fixed by notching and further secured with ties and beams.

When you run a single hipped roof of his diagonal rafters must be supported at runtime console, while the console should extend 15cm beyond the cantilever frame. If two runs of a ridge, to be sewn to the rafters scrap boards - priboinu - thickness of about 5cm. It's the will draw diagonal trusses and nakosnye.

Based on the exterior of the valley rafters are nakosnymi and diagonal, and last longer than usual. They are the backbone of narozhnikov - shortened rafters rays. In such cases, the acts nakosnye rafters load twice as great as the one that falls on the rafters usual.

The length of these diagonal trusses exceeds the standard length of the boards, so they should pairing. This allows:

assign twice by twice the load section;
do beam length, not cut;
unify the sizes of parts used.

Thus, thanks to odnovysotnym boards skates, simpler designs for hip roof.

Multispan provided by setting one or two supports under each rafter nakosnuyu because they are a kind of extension of tilting and bifurcated ridge run. Therefore merging of the planks in length should be made so that the removal of the center joint of the support was 15 m. Rafter length should be chosen based upon the length of spans, and the number of poles.