Home » Architecture Billings Index Positive for Fourth Month Floor Install News Architecture Billings Index Positive for Fourth Month March 21, 2012 Order Reprints No Comments Led by the commercial sector, the Architecture Billings Index (ABI) has remained in positive territory four months in a row.See the full story at www.aia.org. Related Articles Commercial projects outperform overall billings index AIA: Architecture Billing Index up Existing-Home Sales Dropped for Fourth Consecutive Month Fourth Quarter Indices Show Continued Improvement for Apartment and Condominium Market You must login or register in order to post a comment. Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.