Attic Framing Details

2 5 view a consists of a wide long member called the blade and a narrow short member called the tongue.

Attic framing details.

Collar ties rafter ties tension beams structural ridge beams. Gable and hip roofs may be built primarily of trusses. Rafter layout with a framing square this example is for a roof with an 8 12 pitch position the square at the end of the rafter board with the tongue on your left and facing away from you. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members.

The blade and tongue form a right angle. 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. The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.

Other roof shapes particularly those with dormers or on houses with cathedral ceilings attic rooms or attic storage areas are stick built. Stick framing creates a triangle between the rafters and ceiling joists. Actually these were compilations of articles he wrote about 100 years ago in the union magazine. The face of the square is the side one sees when the square is held with the blade in the left hand the tongue in the right hand and the heel pointed away from the body.

Some of these can support the roof and prevent ridge sagging and wall spreading. Flat roofs may also need to be designed for live loads if people can walk on them. Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house. Roof framing must be designed to hold up a structural load including what is called dead load its own weight and the weight of the roof covering and additional loading called the environmental load such as snow and wind.

A collar beam adds strength to the triangle at the middle. I learned roof framing the hardest and most maddening way possible from h h. The framing square fig. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters and panel sheathing products.

It is a waterproofing layer made of regular felt stacked above the solid.