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.

I often see roof loads calculated based on the horizontal run of the roof. Dead load weight of structure and fixed loads 15 lbs ft 2. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. A ridge board is a horizontal member of the roof frame.

The ridges on the roof run front to back in sync with the roof line. End roof trim 3. 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. It is a waterproofing layer made of regular felt stacked above the solid.

But isn t it more accurate to figure the weight of snow and roofing materials by measuring along the actual length of the rafter. 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. Discover the pros and cons to multiple roof designs.

Features associated with basic roof framing terms are shown in figure 2 2. By upper third here we mean one third of the length of the rafter from ridge to top plate. A collar tie is a horizontal roof rafter compression connector that is located in the uppermost third of the span of a pair of opposed sloped or gable roof rafters. Refer to the figure as you study the terms discussed in the next paragraphs.

Definition of collar tie in roof framing. Live load is weight of furniture wind snow and more. Horizontally oriented roof panels. The point at which all the raftersare attached to.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Features of horizontal roof system listed below.

Transfers the loadof the roof through the raftersto walls below. Thus as the roof gets steeper the rafter gets longer and the weight of roofing materials increases. This is our ultimate roof rafter guide for people designing and building an off grid cabin or tiny home. 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. The a frame horizontal roof boxed eave is popular due to its residential style look. 2 are indicated below. 1 ft 0 3048 m.