Null areas (i.e. area objects with area section assignment "None") are  

A null area is an area object which is assigned the None property such that it may be excluded from analysis, but can be used to apply area loads of type " Uniform to Frame (Shell)". However, for all other types of area loading, you would need to define an area section with a very small thickness and assign this section to area objects for the purpose of load assignment. This will ensure that the areas will transfer the loads without loading transfers without the object contributing to the structural stiffness of the structure. Make sure that you do not assign Check that auto-meshing is not assigned to these area objects as , otherwise , you may run into numerical issues numerical problems may result.

See Also

• None property article
• Shells with no stiffness article