thanks - i've had a bear of a time making sense of the regs.
given the square foot size restrictions, would it make sense to use multiple segments with gaps between to provide a greater length?
~~b---o---o---o---o---o---o---o---o---o---o---o--b~~
~~|~~~|~|~~~|~|~~~|~|~~~|~|~~~|~|~~~|~~
~~|xxxx|~|xxxx|~|xxxx|~|xxxx|~|xxxx|~|xxxx|~~
~~|xxxx|~|xxxx|~|xxxx|~|xxxx|~|xxxx|~|xxxx|~~
~~|=============================|~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|