Altro is a registered provider of five AIA/CES approved presentations. These CEU presentations are usually held as "lunch and learn" events and are hosted by your local Altro representative. These presentations will help you achieve LU and HSW credits. To maintain membership in the AIA, you are required to take 18 LU (learning unit) hours and 12 hours of HSW (health, safety and welfare units) per year. Let Altro help you maintain your membership by attending our quick and informative presentations.