Gable Roof Framing Without Ceiling Joists

How to frame a gable roof with no ceiling.

Gable roof framing without ceiling joists.

The plans for a house i am building call for a great room with a cathedral ceiling. I know you can do it with a gable having a structural ridge supported on each end but what about a hip. The shape and size of a roof depends on the span and the floor. With no posts under the hip or ridge would it want to kick out and the ridge go down.

How can i remove the ceiling joists without allowing the ridge to sag or the walls to bow out. For example if a house has a 4 12 slope the rafters are on 16 inch centers the snow load is 30 psf and the roof span is 28 feet you need eight 16d common nails or 40d box nails at. The room measures 26 ft. Some of these can support the roof and prevent ridge sagging and wall spreading.

Is it possible to frame a hip roof without ceiling joists. Continuing on from part 3. Where ceiling joists are used to provide resistance to rafter thrust lapped joists shall be nailed together in accordance with table r802 5 1 9 in the irc. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

A standard triangular roof known as a gable roof is framed using rafters which are diagonal members that support the roofing materials. Here we have a wood framed gable roof. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. How to frame a gable roof without ceiling joists.

A gable roof is a heavy structure and if you want to prevent your roof from collapsing you ll have to frame the structure correctly. Gable roofs without ceiling joists provide a much higher and triangular shaped ceiling inside the home. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. Collar ties rafter ties tension beams structural ridge beams.

Along the eaves walls and 20 ft.