model plant support plinths in revit roof joists in revit agacad multiple family types of beam in revit unable to find revit shared parameters create a unique beam family in revit the beam positioning line difference multiple family types of beam in revit justification planes for beam families multiple family types of beam in revit unable to find revit shared parameters speckle 2 bim revit features ideas chapter 9 revit family parameter revit dimension pipes to grid lines chapter 9 revit family parameter instance profile parameters parameters in revit autodesk revit family framework