AWWA D110-04 Wire- and Strand-Wound, Circular, Prestressed Concrete Water Tanks (PDF)
SKU: STD_0060828-PDF
The intent of this standard is to describe current recommended practice for the design, construction, inspection, and maintenance of wire- and strand-wound, circular, prestressed concrete water-containing structures with the following four types of core walls: Type I - cast-in-place concrete with vertical prestressed reinforcement; Type II - shotcrete with a steel diaphragm; Type III - precast concrete with a steel diaphragm; and, Type IV - cast-in-place concrete with a steel diaphragm. This standard does not describe bonded or unbonded horizontal tendons for prestressed reinforcement of the tank wall, floor, or roof. This standard applies to containment structures for use with potable water or raw water of normal temperature and pH commonly found in drinking water supplies. It is not intended for use in the design of containment structures for highly aggressive waters or high-temperature waters without special consideration being given to their effects on the structure; nor is it intended that the standard be used for the design of structures for wastewater, bulk dry storage, chemical storage, or storage of slurries. The Third Edition of the standard has been edited throughout and includes revisions to stated definitions and terms adopted to achieve a higher degree of consistency among the Standards produced by AWWA Standards Committees.
Description
The technical revisions to the Standard reflect current thinking and construction practices. These include: addition of a definition of the term "designer"; revision to the definition of purchasers engineering agent; references to ACI 344 for design and construction of circular, wire- and strand-wrapped prestressed concrete structures has been deleted and replaced with ACI 372R; references to AASHTO T-260 test method have been deleted, and additional references to ASTM C882, D624, D638, D698, D747, D2240, and D2922 test methods have been added; references to ASTM A185, A1008/1008M, C1218/1218M, and D1566 have been added; revisions have been made to Sec. 2.6.1.1, plastic water stops, and a table detailing properties of PVC water stop have been added; line call-out numbers of neoprene bearing pads and natural-rubber bearing pads have been revised (Sec. 2.6.2.); materials used as sealants for steel diaphragm joints have been revised (Sec. 2.9.1); the design nomenclature has been revised, and metric units have been added (Sec. 3.1); an alternate design method for allowable stresses for type II core wall with eight-gauge wire only has been added (Sec. 3.4.4); requirements for installing wall openings in the tank have been added (Sec. 3.5.10); a requirement for subsurface investigation and a geotechnical report has been added (Sec. 3.8.4); requirements for compaction and construction of the floor base material has been added (Sec. 3.8.5); sections regarding wall access ways (Sec. 3.11.5), baffle walls (Sec. 3.11.7), and inner storage walls (Sec. 3.11.8) have been added; Sec. 4, Provisions for Earthquake Induced Forces, has been rewritten to conform with UBC 1994, and an alternative seismic design method, based on the seismic design requirements of UBC 1997, has been added as appendix A; information on quality control requirements has been added (Sec. 5.3.4); additional information on repair of water loss through floor piping and valves has been added (Sec. 5.14.3); and, 18. additional information on tank backfill requirements and backfill compaction requirements has been added (Sec. 5.15).