I suppose I might be able to create a door property with an expression that would be something like "Door clear opening = egress dim - panel thickness" and create a autotext label that read this property. Any neater idea?
If your door object does not have that clear opening value, then your only real option is to create a property for it.
Otherwise it is a case of finding a door object that does have this value or editing the GDL scripts to calculate that value as a parameter in the object.
Creating a property is probably the best idea.
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