Horizontal Roof Framing

By upper third here we mean one third of the length of the rafter from ridge to top plate.

Horizontal roof framing.

2 are indicated below. The point at which all the raftersare attached to. Horizontally oriented roof panels. Learn the 1 rafter design that will guarantee your roof that is safe and strong for years to come.

Discover the pros and cons to multiple roof designs. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. But isn t it more accurate to figure the weight of snow and roofing materials by measuring along the actual length of the rafter. Span is the horizontal distance between the outside top plates or the base of two abutting right triangles.

In finding this location we do not count the additional length of the rafter that supports the roof eaves overhang or soffit. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Ridge beam sits below the rafters. Unit of run is a fixed unit of measure always 12 inches for the common rafter.

Definition of collar tie in roof framing. 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. Thus as the roof gets steeper the rafter gets longer and the weight of roofing materials increases.

Live load is weight of furniture wind snow and more. Transfers the loadof the roof through the raftersto walls below. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 1 ft 0 3048 m.

End roof trim 3. A ridge board is a horizontal member of the roof frame. I often see roof loads calculated based on the horizontal run of the roof. This style is commonly used in areas that do not have much snow or rain fall but are not limited to those area.

It is a waterproofing layer made of regular felt stacked above the solid. 1 psf lb f ft 2 47 88 n m 2. 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. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

Refer to the figure as you study the terms discussed in the next paragraphs. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. Features associated with basic roof framing terms are shown in figure 2 2. Dead load weight of structure and fixed loads 15 lbs ft 2.