Which component is placed on the ridge of the roof to fasten the upper ends of other rafters?

The ridge board serves as a critical component in roof construction, located at the peak or ridge of the roof. Its primary purpose is to provide a straight edge to fasten the upper ends of other rafters, ensuring that they are securely anchored and aligned properly. This structural element helps maintain the overall integrity of the roof system, supporting the weight of the roofing material and any additional loads that may be placed upon it.

In addition to providing a fastening point for the rafters, the ridge board also assists in establishing the overall shape of the roof and contributes to the aesthetics of the structure. It is an essential framing component that enables the effective distribution of weight and stress, particularly in sloped roofs.

Other options such as the ridge vent, ridge rafters, and ridge shingles have different functions. Ridge vents facilitate ventilation within the roof space to prevent moisture buildup and increase airflow. Ridge rafters are inclined framing members that run along the ridge of the roof, while ridge shingles are roofing materials specifically designed to cover the ridge and protect it from the elements. These elements do not fulfill the fastening role that the ridge board does, making the ridge board the correct choice in this context.