Refer to the Diagram: A ceiling framing member that is perpendicular to wall. To minimize cracking due to structural stress, what should be the minimum distance from the corner to the first screw fastener on the wall?

Refer to the Diagram: A ceiling framing member that is perpendicular to wall. To minimize cracking due to structural stress, what should be the minimum distance from the corner to the first screw fastener on the wall?