How To Read Roof Framing Plans

The run or half the building span is the base of the triangle.

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. The roof plan shows the rafter direction and spacing but not the rafter length. Showing you guys everything you need to know along the way. A ridge board is a horizontal member of the roof frame.

With this method only 2 calculations are needed. Either way knowing how to read construction plans is a critical skill. The easiest and most accurate method to measuring a roof plan is to square everything off. Learning how to read construction plans is an essential skill for building a career as a construction worker.

Calculate the ratio of the rafters horizontal run to its slope length. 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. Ridge beam sits below the rafters. 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. Notice the bold dotted line this dotted line separates the main roof from the gable pop out on the front of house. 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. The point at which all the raftersare attached to.

Ridge board v s beam. Input the pitch of the roof that you calculated above we ll use 7 12 for reference throughout on the framing square. Parts of a roof. Transfers the loadof the roof through the raftersto walls below.

This means that you want to divide the roof into sections. And the line length measurement from the roof peak to the building wall is the hypotenuse. 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.

One of the most important parts of building a sturdy roof is the initial roof framing plan. The rise or height of the roof at its peak is the altitude of the triangle. In this mini series we re going to cover construction blueprints from start to finish. Supported by lally columns.

Ridge board ridge beam. Ridge horizontal ridge length hip valley rafters have a different factor.