No. 95-3688. November 13, 1997. Michael T. Manley, Blake Uhlig, P.A., Kansas City, KS, for IBB. Dion Kohler, C. Thomas Davis, Lee Stanford Sherrill, Atlanta, GA, for H. B. Zachry Co. Aileen Armstrong, Deputy Assoc. General Counsel, Nancy B. Hunt, Margaret G. Neigus, Frederick C. Havard, Jill A. Griffin, NLRB, Washington, DC, for NLRB. Petition for Review and Cross Petition for Review of the National Labor Relations Board. (Agency Nos. 12-CA-14962, 12-CA-14962-2 12-CA-15018) Before CARNES, Circuit