The rafters support the sides or slope of the roof.
Ridge board roof framing.
Wondering how to build the structure of your roof.
Determining the ridge beam height if you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam.
This video covers one of the most exciting parts of roof framing installing rafters.
Mark along the backside of the tongue.
Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.
The ridge beam could also be flush with the joists.
Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.
Rafters and a ridge board are the key components of a roof framing system.
Definition of structural ridge or ridge beam used in roof framing a structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself.
The engineering principles are pretty straight forward for a ridge beam.
Choose a ridge board that is one size larger than your common rafters.
Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge board.
The ridge board forms the peak and ties the rafters together side to side and end to end.
The ridge board s length will be the outside measurement of the building plus the length of the overhang at both ends.
Other elements like gable studs and cross ties supply additional bracing.
Framing a roof is the last step in framing new construction.
Position the square with both the 8 inch on the outside edge of the tongue and the 12 inch on the blade on the upper edge of the board.
We will go over raft.
For 2 x 4 rafters use a 2 x 6 ridge board.
This is the plumb cut for the roof ridge.
In part 3 of our roof framing series we cover how to select a ridge board how to layout a ridge board how to mark it so you know where to fasten the raft.
The sloped roof joists span between two pinned points.
While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.
For 2 x 6 rafters use a 2 x 8 ridge board and so on.
