PURPOSE Proposals are being requested for general contracting services as described and specified within this document. Any omissions from these specifications and supplemental specifications of any details or descriptions concerning any point, product, or service shall be regarded as meaning that only the best commercial practices are to prevail, and only services of the highest standards are required. Interpretations of these specifications shall be made upon the basis of the preceding statement during award consideration. SCOPE Construction Services. The contractor shall provide services to rehabilitate two approximate 780 linear foot 30 inch inside diameter steel condenser water pipes servicing the Georgia World Congress Center B mechanical plant. All measurements are to be field verified by the contractor. The contractor shall provide all labor, equipment, and subcontractors necessary to coat the inside of the pipes with a multi-layer elastomeric liner. The contractor shall furnish four new 30-inch butterfly valves and replace the existing valves. Two located in the pump room adjacent to the cooling towers, and two located in the B mechanical plant. All materials, labor and equipment to replace the valves shall be provided by the contractor. For the purpose of coating application, the contractor shall provide midpoint access of sufficient size to allow for the use of robotic application equipment. The contractor will use a qualified concrete subcontractor to saw cut and remove the concrete to provide access. Scan areas for utilities, an approved utility locater shall be employed. Located utilities shall be hand excavated to avoid damage to conduit and wiring. Remove debris to receptacle provided by contractor, location and removal method shall be discussed with GWCCA prior to work beginning. The cuts will be made without overcuts and dust control measures and vacuums will be used throughout the cutting process. The fill material shall be excavated around the pipes and the contractor will use a mechanical contractor experienced with large diameter pipe fitting to cut the pipe sections. The sections shall be removed from the excavation and flanges welded to the pipe sections and in ground pipe for reinstallation by the mechanical subcontractor. The pipe sections shall be coated with the same multilayer elastomeric liner before being reinstalled. Once reinstalled the flanged pipe sections will be leak tested under normal operating conditions. The excavation shall be backfilled with crushed stone and compacted. Install #4 rebar dowels every 12”, drill holes 6” into existing concrete slab, flush holes with water, inject holes fully with epoxy suitable for structurally securing rebar doweling, following manufactures instructions for mixing and instillation. Insert lengths of rebar into the holes twisting to ensure even coating of epoxy along the length of the rebar inside of the holes. The rebar is to extend a minimum of 6” into the concrete pour. The concrete shall be 5,000 PSI and reinforced with wire or rebar. Control joints in existing slab shall be extended through repair pours. The concrete shall be finished and sealed to match existing.
