Roof Rafter Framing Details

The function of each component is.

Roof rafter framing details.

A collar tie is a horizontal roof rafter compression connector that is located in the uppermost third of the span of a pair of opposed sloped or gable roof rafters. Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other. Joists and collar ties. The values on the calculator that we use for common roof framing are.

Cover some of the more common roof and rafter terms you ll need. Roof features associated with basic roof framing terms are shown in figure 2 2. Using a construction calculator. Ridge beam sits below the rafters.

Roof framing terms are related to the parts of a triangle. Pitch rise run and diagonal. Span is the horizontal distance between the outside. By upper third here we mean one third of the length of the rafter from ridge to top plate.

Supported by lally columns. If you have any two of those values the calculator will quickly figure out the rest of the right triangle which means it will tell you everything else you need to know about a rafter. Refer to the figure as you study the terms discussed in the next paragraphs. The rafters carry the applied loads to the exterior walls.

Position the square at the end of the rafter board with the tongue on your left and facing away from you. Definition of collar tie in roof framing definition. The point at which all the rafters are attached to. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

In a rafter roof all of these components are required to provide a stable roof. Parts of a roof a ridge board is a horizontal member of the roof frame.