Attachment 1 - Water Tower Drawings.pdf

This document is a set of fabrication and construction drawings for a 150,000-gallon spherical elevated water storage tank manufactured by Phoenix Fabricators & Erectors, Inc. The tank is designed for the VA Medical Center in Walla Walla, Washington, with serial number 3456-150, fabricated in 2015.

The tank specifications include: 34-foot diameter, sphere-type construction, capacity of 150,000 gallons, high water level at 184 feet 0 inches, low water level at 164 feet 0 inches, head range of 33 feet 6 inches, stem diameter of 9 feet 0 inches, access tube diameter of 4 feet 0 inches, and inlet/outlet combined at 1 foot 0 inch. Design criteria conform to AWWA D100-11, ACI 318-08, ASCE 7-10, and IBC 2012 standards. The tank weight is 146.5 kips with wind loading at 90 mph per AWWA standards and seismic design per IBC 2012. The drawings include detailed specifications for structural components (base cones, compression rings, exterior rings, upper and lower transitions), interior/exterior piping systems, platforms, ladders, hatches, roof details, vent assemblies, drain systems, painting and coating systems (interior wet/dry coatings and exterior finishes in Fountain Bleu), electrical installations, and grout specifications using NS Grout (non-shrink, non-stain, non-metallic). Foundation design requirements specify an allowable soil bearing pressure of 4,000 psf at 6 feet 0 inches below existing grade with reinforcing steel conforming to ASTM Grade 60 and concrete meeting C-150 Type I specifications with minimum 4,000 psi compressive strength.