What is the most common type of rafter?

trussed rafter
In modern house construction, the most common form of rafter is known as the fink or ‘w’ trussed rafter. This consists of a rafter incorporating tension and compression members in the shape of a W. This is capable of spans up to 12 m and can be designed to accommodate many different pitch angles.

What are the different types of rafters?

There are basically seven different types of roof rafter designs used to create a roof: common, hip, hip jack, valley, valley jack, cripple jack and flying hip.

Do you need to lay out a common rafter?

Laying out hip, valley, and jack rafters takes experience and skill, but if you’re building a simple gable or shed roof, all you need is the common rafter, the basic building block of roof framing. To lay out a common rafter, you need the pitch of the roof, expressed in units of rise per foot of run.

What are the different types of roof rafters?

Truss: A network of prefabricated double sloped beams bridged by a bottom brace. Trusses are the modern engineered method for supporting the roof. Gable: Generally a portion of the wall between the edges of intersecting roof pitches. There are several shapes of gables, which define the style of rafter/truss used, but the most common in triangle.

How to calculate the dimensions of a rafter?

Common Rafter Calculator – Rafter Dimensions – Plumb Cuts – Birds-mouth Dimensions + Cutting Templates – Inch Allow for Ridge Thickness when determining Rafter Run to Outer Wall. eg: Half building width minus 1/2 ridge thickness.

How are inclined rafters attached to a roof?

The tops of the inclined rafters are fastened in one of several ways determined by the type of roof. The bottoms of the rafters rest on the plate member, providing a connecting link between the wall and the roof. The rafters are really functional parts of both the walls and the roof.