Building Trades Holiday Luncheon 2012 Carpenters Local 713 members Joel Evans, Walter Page, Amy Smith, Craig Savelho and Joseph Herrera. Greg Feere, Contra Costa Building and Construction Trades Council, left, with Cement Masons Local 300 members. BTCA Secretary-Treasurer Andreas Cluver thanked the affiliated building trades unions for their work in 2012. Congresswoman Barbara Lee with BTCA Secretary-Treasurer Andreas Cluver and family, daughter Adriana and wife Celia. Ironworkers Local 378 member Chris Derrico and Business Manager Bobby Lux.