A 4 by 10 can usually span up to 12 feet between posts.
Porch roof weight 10ft wide 5 feet deep.
Barry c 2 21 2017 5 15 44 pm reply.
In the example the beam spans the 10 foot width of the roof.
The total load is 4 000 pounds.
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Other porch considerations proportion.
Thatch approximate typical weight 7 lbs.
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.
The following lines assume a circular footing.
This sizing guide for roof rafters will help determine what you need for your small project.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
Maximum rafter spans for a patio roof.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
You don t take into account the weight of the pier.
Many resources will say the minimum for a porch is six feet in depth.
There are several variables to consider when determining the proper rafter size.
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2 1 m deep and 12 ft.
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.
It is low enough to the ground to do without a railing.
The smallest beams for patio covers are typically 4 by 6.
If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.
For the initial calculation f can be estimated at 1 000.
Donald r 3 10 2017 1 05 37 am reply.
Front porch design 8 or 10 feet depth jule from missouri writes.
In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.
The first line is the pressure per square foot.
A 12 diameter circle is 79 square feet in area thus the lower number.
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.
Now the example formula is 4 000 1 000 bd 2 9 x 10.
Or is that somehow.
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.
Is that an oversight.
Certainly every porch is different.
L stands for the span of the beam in feet.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.