After that to make it flush with the roof of the existing house cut the two outer rafters.
How to support porch with exposed beams and metal roof.
If the post is not going to be perfectly level use a pry bar on one corner and shim the post before you secure it into position.
Metal beams could also be used and would eliminate the need for most of the supporting posts across the front of your porch.
You will need to make sure that each of the posts is plumb.
Attach the horizontal beam by using a nail gun.
You have to do it thoroughly so that the rafters sit flush on it.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
Apr 26 2018 explore christina romero s board porch beams followed by 132 people on pinterest.
A post for each story sits on the floor surface up to support the floor beam above it.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
The tables below give maximum spans for rafters and beams.
It is not a continuous post however.
Building a porch roof requires basic carpentry and porch roof framing knowledge.
In this way you can continue your floor beam structural posts all the way from the basement up to the roof beam.
The next post sits atop this floor beam directly above the lower post and runs up to the next floor beam or to the roof beam.
They also can be boxed in with wood after installation.
The figures are based on quality materials.
See more ideas about house exterior porch columns house with porch.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
Beams can be solid lumber or be built from lengths of 2 by lumber nailed together with 1 2 inch pressure treated plywood spacers in between this forms a 3 1 2 inch thick beam that is equal to the width of a 4 by post.
We show you the steps involved and calculations required for buildng a roof for your porch or constructing one over your deck or patio.
A flitch plate is a metal plate sandwiched between two framing members such as 2 x 10s.