Framin Roof Layout

Refer to the figure as you study the terms discussed in the next paragraphs.

Framin roof layout.

Unit of run is a fixed unit of measure always 12 inches for the common rafter. This mistake happens quite often when you ve got multiple walls to frame up. Breaks perfectly on a stud. Span is the horizontal distance between the outside top plates or the base of two abutting right triangles.

This will the first point of the rafter measurement line. Features associated with basic roof framing terms are shown in figure 2 2. Meeting current irc roof framing requirements means builders are really constructing very simple triangles using the rafters and ceiling joists because triangles are known to be the most stable shape. Measure down y height from the long point of the rafter cut and make a mark.

Framing gone wrong top and bottom plates. 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 framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof. 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.

Roof framing rafter layout from one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it. In order to maintain the triangle shape there are specific requirements for how to fasten the corners of the triangle together.