I was surfing around during this weekend's snow while feeding the woodstove and critiqueing Christmas cookies. I read a thread on another forum about a reciprocal roof which lead to a link that mentioned Dr Popovic. The concept of the roof was intriguing and I was having a hard time wrapping my mind around it. It seems to be a modification of what is being discussed here.
It worked with any number of members greater than 3.

The connections were just 1/8" holes drilled with #12 copper wire loosely hooked through to prevent the members from sliding. I was fully expecting a collapse but it was quite strong.

Just call me easily entertained.