structural mezzanine floor plan
 

structural mezzanine floor plan
hi everyone,
i came across a website a few years back that offered, for download a small software package for free that worked out distances of structural uprights and cross beams in the form of a diagram once you had given the overall dimensions of the floor to be built. i am desperately looking for this again and can't seem to find it. does anyone have any idea where i can find it or maybe an alternative.
thank you
drewsa