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Porch roof weight 10ft wide 5 feet deep.
For the initial calculation f can be estimated at 1 000.
The total load is 4 000 pounds.
If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.
A 12 diameter circle is 79 square feet in area thus the lower number.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
It is low enough to the ground to do without a railing.
At six feet porch furniture is possible and you can reasonably enjoy the space.
F stands for the beam s fiber strength in bending which depends on the species of wood.
2 1 m deep and 12 ft.
In the example the beam spans the 10 foot width of the roof.
You don t take into account the weight of the pier.
You want to keep in mind how you will use the space and plan for furnishings that will provide for your porch activities whether they are mostly for aesthetic or functional proposes.
Or is that somehow.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
The following lines assume a circular footing.
L stands for the span of the beam in feet.
In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.
A 4 by 10 can usually span up to 12 feet between posts.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
Certainly every porch is different.
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Donald r 3 10 2017 1 05 37 am reply.
Is that an oversight.
I can t find the answer anywhere we are planning to build a 3 sided wrap around porch on a new addition i m not sure if we should go with 8ft or 10ft deep.
Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.
Barry c 2 21 2017 5 15 44 pm reply.
There are several variables to consider when determining the proper rafter size.
Other porch considerations proportion.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
The smallest beams for patio covers are typically 4 by 6.
This sizing guide for roof rafters will help determine what you need for your small project.
The first line is the pressure per square foot.
Now the example formula is 4 000 1 000 bd 2 9 x 10.
Many resources will say the minimum for a porch is six feet in depth.
This is for good reason as that allows enough room for you to incorporate chairs potted plants and or other furniture with enough room to move around and walk in front of the furniture.
This porch is approximately 8 ft.
I want the porch to be roomy with a lot of room for traffic and furniture without that squished feeling.
