You need it when using engineered trusses.
One alternative method for roof construction that eliminates the need for a ridge board is using a ridge beam instead.
In roof construction, a ridge board is a horizontal piece that connects the upper ends of the rafters, while a ridge beam is a larger, structural beam that supports the weight of the roof. The ridge board is mainly for alignment and connection, while the ridge beam provides structural support.
It is true that no ridge board is needed if the pitch is steep and rafters are directly opposed. This is the only time a ridge board is not needed.
You will need something that will substitute for the same role as a ridge board. If you are building a structure, you must be able to understand the physics of the structural loads. Think about what role the ridge board plays in the structure of the roof. What would happen if it was gone? The ridge board prevents side to side motion. without a similar structure your roof would collapse sideways.
You would not have to add a ridge board, particularly if you are planning to build the addition roof directly over the existing roof.
The purpose of a ridge board in a roof structure is to provide support and stability to the rafters at the peak of the roof. It helps to distribute the weight of the roof evenly and prevent sagging or shifting of the roof structure.
For a typical gable roof you have a ridge board at the top with rafters running from the ridge to the top plates of the walls
A ridge board is a horizontal member that supports the upper ends of the rafters in a sloped roof system. It helps to connect and stabilize the rafters at the peak of the roof, providing structural integrity to the roof framing system.
Nope. The gap between tha decking is for the installation of a ridge vent (most likely.
The purpose of a roof ledger board in building construction is to provide support and stability for the roof structure by connecting the rafters or trusses to the building's frame.
The uppermost member of the roof frame is called the "ridge board" or "ridge beam." It runs along the peak of the roof and serves as the horizontal support for the sloping rafters that extend down to the walls of the building. The ridge board helps to maintain the structure's shape and stability while providing a point for the rafters to connect. In some designs, a ridge beam may be used instead, which provides additional structural support.
The ridge board is typically the same dimension as the rafter or slightly smaller, depending on the design of the roof. It serves as a structural element at the peak of the roof, providing support for the upper ends of the rafters. In most cases, the ridge board is made from a 1-inch thick material, while the width may vary but often matches the rafter's width for a flush fit. This configuration helps to create a stable framework for the roof structure.