M. Cohen and Sons steel installed the West Entry to the future Queens Museum recently (Grimshaw Architects / Amman and Whitney / Capco).  The design is a seamless stainless steel cantilevered frame with a 1/2" thick edge on all three sides.  We were the structural engineers for the canopy and designed the canopy within a 1/16" edge tolerance by unhinging the stainless steel from the deflection of the carbon steel cantilevers.

Under thermal movements, the walls are designed to move with the contraction and expansion of the roof, so the walls were hung. This allowed the joint between the wall and the roof to be seamless.  Here is a portion of our BIM model...

Here is a Video