Almost any RAM Concept slab model can be converted to an equivalent iTwin repository. Following these modeling guidelines in RAM Concept will reduce the chance of problems in model consistency.

• Drop caps and panels, on the interior or exterior, should not be modeled by adding openings to a slab and filling them with other slabs. Instead, increase the priority on the drop panel slabs so that they override the base slab.
• Slab area islands can be handled properly if modeled with care. A slab area island is completely contained within, and higher priority than, a slab opening. The slab opening is contained within or on the edge of, and higher priority than, another slab area. If the island slab area does not overlap the outer slab area's effective shape, it will converted into a separate Analytical iTwin surface member. The preferred iTwin repository object is a surface member with an opening and a modifier. This can be accomplished by splitting the opening so that it surrounds the island slab without covering the larger slab. If the RAM Concept slab is constructed with openings whose priorities are larger than all of the slab areas, then it will map correctly to the Analytical iTwin surface member.