Horizontal Roof Framing

Learn the 1 rafter design that will guarantee your roof that is safe and strong for years to come.

Horizontal roof framing.

Span is the horizontal distance between the outside top plates or the base of two abutting right triangles. This is our ultimate roof rafter guide for people designing and building an off grid cabin or tiny home. Horizontally oriented roof panels. A ridge board is a horizontal member of the roof frame.

A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework. 1 ft 0 3048 m. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Thus as the roof gets steeper the rafter gets longer and the weight of roofing materials increases.

End roof trim 3. Refer to the figure as you study the terms discussed in the next paragraphs. Features of horizontal roof system listed below. Definition of collar tie in roof framing.

In finding this location we do not count the additional length of the rafter that supports the roof eaves overhang or soffit. The point at which all the raftersare attached to. Features associated with basic roof framing terms are shown in figure 2 2. But isn t it more accurate to figure the weight of snow and roofing materials by measuring along the actual length of the rafter.

I often see roof loads calculated based on the horizontal run of the roof. The ridges on the roof run front to back in sync with the roof line. The a frame horizontal roof boxed eave is popular due to its residential style look. Transfers the loadof the roof through the raftersto walls below.

Discover the pros and cons to multiple roof designs. Dead load weight of structure and fixed loads 15 lbs ft 2. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Live load is weight of furniture wind snow and more.

By upper third here we mean one third of the length of the rafter from ridge to top plate. Ridge beam sits below the rafters. 1 psf lb f ft 2 47 88 n m 2. Unit of run is a fixed unit of measure always 12 inches for the common rafter.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. This style is commonly used in areas that do not have much snow or rain fall but are not limited to those area. 2 are indicated below. It is a waterproofing layer made of regular felt stacked above the solid.