Why am I receiving this warning message (Design Strip - Strip very, very narrow)?

Question

I am designing a two-way slab with beams, and I received a warning message shown below. I am assigning the design strips width manual with the help of Span Boundary Polyline. I used the recommendations from https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/4507/ram-concept-design-strips-tn "Are there any recommendations for modeling design strips for beams?" (see images 2-5) and I am still getting this error message in image 6. Is there something I am missing? 
 
 Image 1 
 
 Image 2 
 
 Image 3 
 
 Image 4 
 
 Image 5

Image 6 
 Best, 
 
 Skylar Calhoun

Seth Guthrie · Answer

Because the strips taper to a point at the end the sections get narrower, and narrower until the program throws a warning. You can use boundary polylines to control the strip width (and column strip width) or you could cut back the strips stopping them short of the tip.