How To Notch 2x4 For Roof

The roof rafters provide integral structural support to the roof.

How to notch 2x4 for roof. This is the first stage of the process. Use ridge cut as point of reference to form birdsmouth. I m not a pro builder and i have a question regarding the roof construction. I m about to put on the top floor roof of this structure that i ve been building mostly alone over the course of the last two years.

We ll be using a ridge beam for this project so each set of rafters will meet a horizontal 2 6 at the apex which will run the length of the shed and connect to all of the rafters. Calculating the pitch of a roof and making ridge cut. For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. After i put up the final four walls and bridge across two of them with the tji s for ceiling roof support how do i then achieve a slight slope in the final flat roof for drainage.

So in our case 2 6. To cut sloping rafters for a house attached patio roof lay a rafter board so it rests on its edge on both the ledger and the beam parallel to the ledger. Remember that for rafters you ll always use a ridge beam one size larger. It s usually easiest to cut one rafter to fit and then use it as a template for the rest but this only works if the supporting beam and ledger or second beam are perfectly parallel.

Use roof pitch to cut ridge cut. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Then measure with of coop remove 1 1 2 in for 2x4. 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.

Roof pitch is measured in a rise to run ratio with the vertical rise always shown first. Calculate pitch of roof. So if your roof is a 45 degree angle that is for every 12 along the horizontal run it rises 12 it s a 12 12 pitch. For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters.

Put the 2x4 on one end. For the purposes of this project we are going to be working with a simple gable roof e g. If you have a simple gable shed roof then using 2 4 rafters makes more sense unless you have a very large shed. If it rises only 6 for every 12 it s a 6 12 pitch.

Drill out a hole in both 2x4 and the branch.