Kalamazoo Regional Educational Service Agency Jigsaw Puzzle Kalamazoo Regional Educational Service Agency A hybrid steel-CLT structural system delivered a bold architectural vision for a new vocational training center in Kalamazoo, Mich.! With three bent plate girder cantilevers (pictured), four round HSS X-columns, and stunning architecturally exposed structural steel (AESS) elements throughout, the Kalamazoo Regional Educational Service Agency is a testament to the beauty and functionality of structural steel. Read more about the project at aisc.org/kresa.