Finding Rafer On Slate Roof

If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

Finding rafer on slate roof. The most precise way to find the roof s slope is by measuring it from the underside. The rise of the rafter. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Either way let s see how you can calculate the slope of a roof without using a roof slope calculator.

Calculate the length of common rafters with this free and easy online tool by entering a dimension for the roof width selecting a pitch for the roof and the thickness of the ridge. The results are automatically fired. Finding roof rafters from the top of the roof can be difficult since regular stud finders have trouble penetrating the plywood shingles or slate tiles covering the rafters. Roofs are under a lot of pressure.

The roof rafters provide integral structural support to the roof. Includes result for hip valley factor slope factor and the roof slope in degrees. Access one of the rafters then take the measurement this way. While making roofing for your house with the roof rafters it is important to know the rafter length to make the roof seat perfectly on the rafter.

If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Load limits on the roof of a building. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

Measuring the slope from the rafters. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.

The length of the rafter. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Typical tiled roof with plasterboard on underside of rafters. Automatically calculate suitable rafter sizes enter a specific rafter size 1 3 timber strength class.

The run of the rafter.