12 1/2 Minutes 12 1/2 Minutes with AISC's Engineering & Research Department Are You Properly Specifying Materials? By Charles J. Carter, PE Part three in a three-part series: fastening products Off the Beam By Scott Melnick Renovating Concrete By Hratch Kouyoumdjian, S.E. Structural steel moment resisting frames are proving to be an attractive alternative for retrofitting concrete structures in seismic areas Seismic Analysis Options For Steel Truss Bridges By Sanjay Mehta, Ph.D., P.E. Seismic retrofitting is becoming increasingly common during major rehabilitation contracts Using Spreadsheets For Steel Design The AISC Database can easily be linked to a design spreadsheet to simplify repetitive calculations News Briefs Steel Quiz