Attic Framing Details

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.

Attic framing details. The framing square fig. 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. Flat roofs may also need to be designed for live loads if people can walk on them. 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. It is a waterproofing layer made of regular felt stacked above the solid. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters and panel sheathing products. He was a xenophobic man with a condescending attitude but he did know his roofs or rooves as a lot of the guys here like to say.

The blade and tongue form a right angle. Collar ties rafter ties tension beams structural ridge beams. 2 5 view a consists of a wide long member called the blade and a narrow short member called the tongue. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

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. I learned roof framing the hardest and most maddening way possible from h h. 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. 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.

Position the square with both the 8 inch on the outside edge of the tongue and the 12 inch on the blade on the upper edge of the board. A collar beam adds strength to the triangle at the middle. Other roof shapes particularly those with dormers or on houses with cathedral ceilings attic rooms or attic storage areas are stick built. Actually these were compilations of articles he wrote about 100 years ago in the union magazine.

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.