Two feet is the general maximum length for a typical roof overhang.
Roof overhang structural support.
An overhang must extend at least 3 4 in 1 9 cm past a roof s edge to reach the gutter.
Remember these loads are distributed uniformly over the entire surface of the roof.
A rake is an overhang located on the gable end of your roof.
There are two types of roof overhangs two consider.
A cantilever roof overhang is one way to really give a really distinctive look to your home.
One of the major considerations of the porch roof is the support that will keep it from falling down.
You may want one or the other or both.
This can be from two causes.
An eave is created by extending the slope of your roof beyond the walls of your shed.
The distance in this case is 12 ft 2 ft 14 ft.
The other common wind related failure at gable ends is uplift of the roof decking at the overhang.
An eave overhang is located on the longer sides of the shed.
If one side of the roof is supported by the house and the other side is supported by the beam divide the total load by two as the beam is only supporting half of the roof.
If you have gutters but still suffer from water rolling down the sides of your home it s likely that your overhang isn t long enough.
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If there is also a beam in the middle of the roof divide the total load by three.
Adding a roof onto an existing porch can add a lot of character to the front of your home.
This will protect a roof from most types of damage.
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A cantilever is a rigid structural element anchored only at one end to a vertical support from which it is protruding.
A rake overhang is created by extending the roof beyond the gables of your shed.
Inadequate nailing of the sheathing to supporting framing or inadequate connections of the framing at the rake edge that supports the roof.
Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports.
This can make extensive roof overhangs more trouble than they are worth in all but the harshest climates.
Divide the total load according to how many supporting beams the roof will have.
Instead of just having an open porch installing a porch roof will enable the homeowner to be able to use the space during times of rain or intense sun.
The exterior wall and the headers within will carry all loads from the mid point of the house between the supporting walls to the outside of the house including the roof overhang.