In framing for an intersecting hip roof, which members are included before jack rafters are installed?

In the framing of an intersecting hip roof, common rafters and hip rafters form the critical structural support system required before jack rafters can be installed. Common rafters are positioned at regular intervals along the roof's incline and connect the ridge to the eaves, providing the primary support for the roof structure. Hip rafters, which run diagonally from the ridge to the corners of the roof, also play a significant role in supporting the roof system at the points where different slopes meet.

By establishing the common and hip rafters first, a solid framework is created. This framework is essential because jack rafters, which are shorter rafters that connect the bottom of the hip or valley rafters to the top of the ceiling joists, depend on the positioning and stability of the common and hip rafters for proper installation.

The other options do not adequately represent the requirements before jack rafters can be added. For instance, only having the ridge or only the hip rafters would not provide the necessary support or structure for the roof, and including valley rafters and collar ties without the common rafters would also be inadequate for the correct assembly of the roof framework. Thus, the correct answer emphasizes the inclusion of both common and hip rafters