How To Read Roof Framing Plans

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

How to read roof framing plans. A ridge board is a horizontal member of the roof frame. In this mini series we re going to cover construction blueprints from start to finish. On the body of the square the longer side input the 12 and input the 7 on the tongue the shorter side of the square by lining up the stair gauges at the corresponding point on the square. Construction drawings vary from simple to very complex so understanding how to interpret the drawings is crucial for completing the project efficiently and accurately.

Transfers the loadof the roof through the raftersto walls below. Typical roof pitches are 6 12 12 12 in pitch and are called out on every elevation of the house corresponding to the pitch on the roof plan. The point at which all the raftersare attached to. Parts of a roof.

To read an architect s drawings start by looking at the plan index which should include a key for reading any abbreviations used as well as a scale bar so you know the size of the structures in the drawings. With this method only 2 calculations are needed. The roof plan shows the rafter direction and spacing but not the rafter length. Notice the bold dotted line this dotted line separates the main roof from the gable pop out on the front of house.

Either way knowing how to read construction plans is a critical skill. Elevation markers elevations markers are dashed lines that show where the floor and plate the top of the framed wall lines of each level correspond to the elevation. 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. One of the most important parts of building a sturdy roof is the initial roof framing plan.

The easiest and most accurate method to measuring a roof plan is to square everything off. Add all the common and jack rafter horizontal run lengths them multiply by the factor. Learning how to read construction plans is an essential skill for building a career as a construction worker. Showing you guys everything you need to know along the way.

Ridge beam sits below the rafters. This means that you want to divide the roof into sections. Ridge horizontal ridge length hip valley rafters have a different factor. Then use the info in the index to help you examine the floor plans and other drawings.

Input the pitch of the roof that you calculated above we ll use 7 12 for reference throughout on the framing square. And the line length measurement from the roof peak to the building wall is the hypotenuse. In order to do roof framing properly it is important to understand the unique shape and dimensions of your roof since these will greatly impact the geometry of the roof frame. Ridge board ridge beam.

The rise or height of the roof at its peak is the altitude of the triangle. Supported by lally columns.