Roof members are important because they support the weight of the roof. They also keep the roof from collapsing. Without roof members, your roof would be very weak and could collapse in strong wind or during a heavy snowstorm.
Commonly used as Rafters, they support many different loads. The most common load that rafters support is the dead load. The dead load is the weight of the materials that make up the roof. The next load that rafters support is the live load. The live load is the weight of people. The last load that rafters support is the wind load. The wind load is the force of the wind on the roof.
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