Final answer:
The main hoop members at the bottom tube attachment point should be spaced according to more recent standards at 8 diameters side-to-side and 15 diameters deep for optimal structural integrity.
Step-by-step explanation:
The question pertains to the specifications for the bottom tube attachment point of a hoop structure's main members and how far apart they should be spaced in the front view. According to older standards, it was suggested that the main hoop members be spaced 5 diameters side-to-side and 7-8 diameters deep. However, more recent studies and engineering guidelines recommend that the spacing should be increased to 8 diameters side-to-side and as much as 15 diameters deep for optimal structural integrity and performance.
This increased spacing helps in ensuring that the main hoop members can adequately support different types of loads and stresses. In Test Prep for AP® Courses, similar concepts related to physics and engineering principles can be explored to understand the dynamics of structures and the forces acting upon them.