Which framing member runs vertically from rafter to rafter to provide support?

The framing member that runs vertically from rafter to rafter to provide support is the jack rafter. A jack rafter is a type of rafter used in roof framing that spans between the ridge and the top plate, serving as a support member for the roofing structure. It typically connects to a rafter, contributing to a stronger and more stable roof by effectively distributing the load.

In the context of roofing and framing, other components serve different purposes. A brace is mainly used to provide lateral support and stability but does not span vertically in the same manner as a jack rafter. A post is a vertical load-bearing member but is typically found in walls or as a structural support element, not specifically tied to the roof framework. Lastly, a stud is a vertical framing member used in wall construction and does not run between rafters in a roof system. The unique role of the jack rafter is essential for maintaining the integrity of the roof while aligning properly with the other framing components.