(CONCOURSE "B" RTU REPLACEMENT) Fire sprinklers used to substitute for 1-hr fire-resistive construction. To remove 9 existing roof top mechanical units and to install 9 new units in their place. Work is to include cutting through two concrete parapets on the roof to provide easier access to 4 of the mechanical units. The work shall comply with the approved drawings, applicable codes, and plan check conditions on file. Separate electrical and mechanical permits required. The re-roof shall be covered under a separate permit. PC-424-97 **CJW**