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SECTION 33 01 16 STEEL WATER RESERVOIR REPAIRS PART1 GENERAL 1.01 SECTION INCLUDES A. Structural repairs and modifications to the interior and exterior of Lino Lakes' 1,000,000 Gallon Fluted Column Elevated Water Tower. All references to Photographs or Drawings are included in these Specifications: 1. Interior Wet Structural: a. Seal weld the inside of the following joints; between the roof plate and the 30 -inch diameter access manway, between the roof plate and the 24 -inch diameter ventilation manway, between the roof and the 48 -inch diameter drywell tube, the inside of the dollar plate butt joints, and the overlapped dollar plate to roof plate seam. See photos 2 through 8 in Section 00 31 00. b. Remove the four painter's rigging pipe couplings in the roof and install cover plates over the resultant holes, seal welded on both the interior and exterior. See photos 6 in section 00 31 00. c. Seal weld all bolted roof -framing connections at the center compression ring with 1/4 -inch fillet weld. After welding, remove all nuts and bolts. This will conform to AWWA D100-11. See photos 2,7,8 in Section 00 31 00. d. Seal weld all un -welded connections of the 42 roof rafters to the shell rim angle. This will conform to AWWA D100-11. See photos 11 and 12 in Section 00 31 00. e. Caulk to annular space between the shell rim angle and the roof plate. See Photos 11 and 12 in Section 00 31 00. f. Install two (2) interior painter's rails to improve rigging for the roof and shell areas of the tower. Install one rail on the roof near the tower shell, and one at an intermediate location. See photos 8 through 12 and KLM Drawing No. 36 in Section 00 31 00. g. Grind off all erection scab marks and weld spatter and other surface defects below the High Water Level by air arc gouging, cutting torch or grinding. Repair the tank surface by welding and grinding. This will require an estimated 50 -labor hours of welding and grinding. h. Grind off all weld spatter and other surface defects below the High Water Level. This work will require an estimated 15 labor hours of welding and grinding. i. Remove all portions of the abandoned Cathodic Protection system. This includes all support brackets and removal of the bowl penetration and seal welding a plate in the resulting hole. See photos 21 and 33 in Section 00 31 00. j. Replace the gasket on the 24 -inch diameter round bowl manway. See photo 23 in Section 00 31 00. 2. Interior Dry Structural: a. Remove and replace the inoperable pipe -style safety climb device on the ladder in the drywell tube with a new OSHA compliant cable -style ladder safety climb device. See photos 25 through 27 and KLM Drawing No. 21 in Section 00 31 00. Similarly, install cable -style ladder safety climb devices on the ladder to bowl manway and to all other six interior dry fixed ladders. See photo 33 in Section 00 31 00.Replace the existing 10 -inch tank vent with a 24 -inch diameter removable top mushroom vent, similar to the one shown on KLM Drawing No. 37. See photo 38 in Section 00 31 00. The new vent and vent screen design should meet AWWA D100-05 and local Health Department Regulations. b. Install ports in the center of the drywell tube floor and the condensate ceiling to facilitate containment. See photos 28,29 and 36 and KLM Drawing No. 52 in Section 00 31 00. STEEL WATER RESERVOIR REPAIRS © 2012 Stantec 1 193802262 33 01 16 - 1