Roof Framing Design

Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult.

Roof framing design.

Definition of structural ridge or ridge beam used in roof framing a structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself. Roof framing depends on the type of roof you want to build. Plywood or osb is the most common materials used for the roof sheathing. Shed gable hip gambrel and mansard.

Roofs are basically five types. 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. There are several roof types. Another common design in the northeast is the saltbox which is a gable roof with one longer side.

A distinction is made between single shell and double shell roofs. It s steep pointed roof which extends all the way to the ground or close to the ground. The gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing.

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. We will then discuss the framing square and learn how it s used to solve some basic construction problems. The a frame is very easy to identify. Asphalt shingle can be installed on a pitch of 2 over 12 or greater.

The roof frame work mainly consists of purlins inferior purlin central purlin and ridge purlin ridge collar rafter and roofing battens. With premanufactured trusses or with rafters and ceiling joists commonly called stick framing. The roof makes up much or all off the walls of the home. All roof framing tables are organized by maximum snow load.

But before discussing roof framing we will first review some basic terms and definitions used in roof construction. Roof framing in this chapter we will introduce you to the fundamentals of roof design and construction. There are two common ways of framing the roof of a house. The structure of the roof roof structure and roofing the roof structure is also called roof frame work and typically consists of wood.

In most regions the first thing to consider before sizing the wood framing members for a roof is the maximum snow load that the roof will have to bear. Initially we will discuss the framing of gable roofs so that we can learn the basics of how to size a roof rafter beam or joist.