By Dennis Collin
With the release of Revit 2024, the Toposurface and Building Pad elements were discontinued. Surface was replaced by a new Toposolid entity, and pad areas could be modelled by using cut and join operations with Massing objects. There is, however, another way to cut Toposolids by use of a shaft opening, which cuts elements in the same way as other slab-based entities like Floor and Roof Objects.
However, there is a slight limitation with this workflow in that should a shaft intersect a Toposolid object, the shaft cuts all the way through the element, ignoring the Shaft’s base constraint and offset properties. The current workaround is to draw Toposolid ‘slabs’ to function as building pads to fill the hole.
This limitation has been noted and will be addressed in a future release of Revit where the Shaft offset constraints will be respected by Toposolid and other similar entities.
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