Roof Framing Plan

A lean to roof just means it s attached to an existing structure.

Roof framing plan.

Transfers the load of the roof through the raftersto walls below. 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. This is the basic problem involved in determining the length of a roof rafter a brace or any other member that forms the hypotenuse of an actual or imaginary right triangle. Parts of a roof a ridge board is a horizontal member of the roof frame.

The point at which all the rafters are attached to. Calculating roof material from rafter plans the roof plan shows the rafter direction and spacing but not the rafter length. Very simple trusses work on a principle of thirds. Calculate the ratio of the rafters horizontal run to its slope length.

Measure down y height from the long point of the rafter cut and make a mark. Roof framing doesn t have to be daunting but if it s your first try a simple gable roof say on a garden shed is the best bet. Lean to shed roof framing. Ridge horizontal ridge length.

One of the most important parts of building a sturdy roof is the initial roof framing plan. Roof framing simply describes how a group of rafters and beams are fitted or joined together in order to provide support for the roof covering. Notch a birdsmouth where it sits on the low wall and extend it past the wall for the eaves. The lower end is done the same way a skillion or shed roof is.

A super basic a frame roof will require anywhere between 4 and 8 depending on the size of the rafters with plumb cuts necessary for each angle in the brace. Roof framing rafter layout. Add all the common and jack rafter horizontal run lengths them multiply by the factor. Depending on the design of the trusses you re making any number of bracing joints will be necessary.

The high end of the rafter sits on or attaches to a ledger plate attached to the existing wall.