Hello all.
I'm trying to make a type catalog for cable tray fittings using family files from Revits's library. I started from horizontal bend, ladder type ("M_Ladder Horizontal Bend" one, please find family file attached if needed). Some parameter values within the catalog as "Bend radius" or "Tray width" must be constrained, hope you are agree with that. All the parameters within the family I used as template have been set up as "Instance parameters". I changed some of them for "Type parameters" but 5 of them can't be changed (refer to attached picture). What would be a reason? If it's happening because parameters used by formula then why I managed to change "Tray length"? Can that be resolved?
Thanks beforehand.
AUGI2.png