Diagram Of Roof Rafters

There are many types of roof trusses as wall as many types of roofs more types than there are parts.

Diagram of roof rafters. This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss. Rafter boards are fastened to the ridge board at the peak and the top plate where they join the wall. To cut roof rafters start by fixing the stair gauges on your framing square to the dimensions of your pitch. Here the birdsmouth plumb is 7637 inches.

19 parts of a roof on a house detailed diagram. There are a number of methods to accomplish marking and cutting out rafters. Ridges need to be shingled or caped to keep the water from trickling into the main frame of the house. The rafter section diagram below typical of a shed or patio cover roof shows the r length measured from the outside wall to the outside face of the ridge beam.

The boards creating the slope of the roof are wider than lumber used to build trusses 2x8s 2x10s and 2x12s are most common in rafters vs. Roof layout requires a number of steps. Ridge and ridge vent. The roof truss structure and design is integral to roof structural integrity and shape.

The actual indentation or cut is known as the birdsmouth while the birdsmouth plumb is the depth of the cut out. The roof beam that extends from the corner of the plate to the ridge along the intersection between the two sides of the roof. Either one is acceptable depending on which type of roof you are building but if you are using the center line of the ridge beam to calculate rafter length remember to subtract 12 the thickness of the ridge beam. Birdsmouth plumb if you study the diagram carefully you will see that there is an indentation in the roof rafter where it meets the exterior wall of the building.

The diagram above depicts the cross section of a typical prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties. Then reposition your framing square so that the stair gauge of. This runs down the length of roof. This video shows you where they.

I will attempt to describe the method i find that works the best for me. The rafters and trusses are connected to the ridge board for a cohesive framework. In a rafter roof all of these components are required to provide a. It resembles real wood and particularly strong and stable for bearing heavy load.

Ridge is at the top of the roof where the two sides meet and form an angle. In this video i look at the components of a typical roof. It is a waterproofing. A composite decking made of solid materials.

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. Prescriptive roof framing technical guide. Once youve marked the lines use your pencil to draw the diagonal length on the rafter. Next set the framing square on top of the rafter beam and use a pencil to trace the outside edge of the framing squares tongue.