Yes either a ridge board or a ridge beam is necessary and required by the building code where roof rafters meet at the the center of their span.
Roof ridge beam install.
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.
How to set the ridge board on a gable roof preparing the ridge board.
Choose a ridge board that is one size larger than your common rafters.
Secure each end with one nail on each side.
The difference between them is that a ridge beam is a structural member that bears half of the live and dead loads of the rafters on either side of it but a ridge board is not structural.
Hand up the first gable end rafter.
I always always build trusses.
First we fueled up with some vegan breakfast sandwiches.
Measure rafter spacings of 24 inches with a tape measure and plan the splice to fall between rafters.
Calculate where a ridge beam splice will be needed.
A 16 foot board will end at a rafter with 24 inch spacing.
Temporarily toenail it into place on the top plate using.
Lift the ridge board to the roof and slide it between the rafter ends on each end from the bottom.
Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.
The loads on the ridge beam are carried by vertical posts at the beam ends down through the building structural walls to the building foundation.
The ridge board is installed to provide a bearing point where the rafters meet and it also helps with alignment along the ridge.
Setting the ridge board.
Here s a picture of a gable style shed using a ridge beam.
The large beam we installed last weekend supports the end the ridge beam at the living room.
Now if you have done any looking around this site you ll quickly see that i am not a fan of using a ridge beam in shed construction.
A 30 foot roof for instance will need at least two boards.
A ridge beam is a structural member used to support the ends of the rafters at the ridge transferring it s loads to posts or gable end walls.
Check the ridge board to make sure it is level and the end rafters are still plumb then add a second nail to each birdsmouth and ridge board connection.
Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.
For 2 x 4 rafters use.
Today we will continue any miscellaneous demolition necessary to install the roof support beam.