Roof Framing Members

Below we give the locations and functions of various roof framing members rafter types collar ties rafter ties ceiling joists and structural ridge beams.

Roof framing members.

Bending for a roof floor or wall surface. Stick framed roofs utilize individual rafters that span from the top of exterior walls to the ridge. Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing. Let s strip away the roof and wall coverings of a home and identify some of the more common roof framing members.

Relatively dense framing such as is achieved with southern yellow pine members holds fasteners better than lower density framing such as spruce pine fir members and may allow for wider spacing of fasteners. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Strutting beams support the roof members where there are no load bearing wall studs available. They do for the roof what the joists do for the floor and what the studs do for the wall.

The tops of the inclined. The members making up the main body of the framework of all roofs are called rafters. There are several roof types. We ll start with a conventionally framed roof in which individual roof framing members are cut and assembled on site.

Standard stick framing or the newer truss framing. The gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. Stick truss roof framing. Nearly all roofs are framed using one of two methods.

To note that the density of the roof framing member must be taken into account when determining fastener spacing. Overhangs hips and dormers add greatly to the complexity of the framing. Rafters are inclined members spaced from 16 to 48 inches apart. Most wood used in light frame residential construction takes the form of dimension lumber.

You ll be evaluating the roof framing from inside the attic space but we have an advantage in technology. Strutting beams should only support roof loads and not be used as ceiling joists. The nominal design. 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. Framers stick building a hip roof you can learn a great deal about roof framing by understanding the concepts of framing a gable or shed roof. They transfer the load of the roof to load bearing walls. They vary in size depending on their length and spacing.

The loads acting on a framing member or system are usually calculated in accordance with the applicable provisions of the locally approved building code and engineering standards.