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approval. <br />b. Install interior bowl ladder below top hatch opening and provide <br />Approx.l2' long x 6" angle supports to wall spaced at 10' intervals. <br />Measure in field to obtain exact length. Submit shop drawing to <br />Engineer for approval. Position new ladder directly below new 30" <br />diameter top hatch for easy access. <br />c. Insta118' long aluminum climb prevention gate on bottom of leg <br />ladder, LADDER GATE or equal. Submit catalog cut to Engineer <br />for approval. <br />(6) Insta118' diameter x 42" tall handrail on roof of tank centered around top <br />vent. Provide 1.5' wide opening in handrail at roof ladder and weld <br />handrail support to each side of roof ladder. See Detail in Drawings <br />Section. Install one 110 volt electrical double outlet on roof handrail and <br />one on balcony handrail. Run new electrical wires from grade to both <br />outlets in new pipe conduit required in item (8) below. <br />(7) Install 6 antenna brackets on roof handrail and 8 antenna brackets on <br />balcony handrail spaced evenly around circumference. See Detail in <br />Drawings Section. <br />(8) Remove all conduits from structure prior to sandblasting. Install two 4" <br />diameter steel pipes with one on each side of leg ladder welded to 6" <br />square x 1/4' thick A36 steel plates aligned vertically to pipe and spaced <br />at 10' intervals to support pipes. Pipes run from grade to roof Approx.l' <br />from ladder handrails. Pipes are to be blasted and painted as permanent <br />part of structure and will be used as conduit for communications wires. <br />(9) Replace one (1) bent balcony handrail brace with new 2" x 2" angle. <br />Measure in field for exact length, brace is Approx. 4' long. <br />(10) Install new 4" tall x 24" diameter raised curb at balcony floor plate <br />opening for leg ladder. Curb to be welded to opening with new A36 <br />steel plate rolled to opening diameter. <br />(11) Remove 15 existing truss rafters on interior of tank and insta1115 new 6" <br />x 6" x 3/8" angle rafters each Approx. 40' long. Roll rafters to curvature <br />of tank. Measure radius in field for exact roll. Install rafters with leg <br />down and seal weld both side of rafter to ceiling. Rafters may be spliced <br />in no less than 10' lengths for ease of erection. Seal weld all splices. <br />Rafters to run from rafter support ring to side wall. See Detail in <br />sw-3 434 <br /> <br />