update..

This is meant to be a shelter with beams having different inclination... As far as the parameters are concerned, the angle of inclination is the most important one (but I still haven't done it!). In fact I parameterized the lenght of the beam, the hight of the column and the height of the joint between them.

I realize the aesthetics is not sufficiently satisfying... 

I'll work on it and on parameterizing the angle of inclination...

This is a rvt file in which a tried to make an erray (but could not make out how to make the beams incline as the pace of the array grows...)