Drawing parabola in archicad

[Anonymous]

Hello Folks

I am Designing a structure where the ridge beam of a gable roof is a saging cable. When under load the cable sags to form a parabola. I was wounding how to draw a parabola using Archicad. I know the location of three points on the curve.

Thanks
Ben

[Aaron Bourgoin]

Hi Ben,

Do a search on this forum for a discussion of catenaries. Or Gaudi. Or both. I think there were formulas and or pointers to another site. Sorry, would do it myself and post the pointer but am on deadline.