USACE / NAVFAC / AFCESA / NASA UFGS-33 16 13.16 (April 2006) ------------------------------ Preparing Activity: NAVFAC Replacing without change UFGS-13208 (August 2004) UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated January 2009 SECTION 33 16 13.16 WIRE-WOUND CIRCULAR PRESTRESSED-CONCRETE WATER TANK 04/06 NOTE: This guide specification covers the requirements for precast, wire wound prestressed concrete water tanks for potable water storage. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information. Remove information and requirements not required in respective project, whether or not brackets are present. Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet. Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR). NOTE: This covers tanks specified by the American Water Works Association in Standard D110. NOTE: The drawings should include: 1. Site plan with existing topography and approximate tank centerline location. Include underground utility locations. 2. Tank overflow elevation, freeboard, approximate height and diameter of tank. 3. Soil information. 4. Loading conditions, such as snow, seismic, and other live loads. 5. Height of backfill, or earthcover, if any. 6. Size, material, location, and limits for all pipe connections. 7. Size, material, arrangement, and location for overflow pipe. 8. Subdrainage and overflow collection system. 9. Earth cover required of inlet, outlet, and drain piping. 10. Size, material, and location of vents and access hatches if manufacturer's standard will not be acceptable. 11. Special exterior architectural treatment, if any. PART 1 GENERAL 1.1 REFERENCES NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title. Use the Reference Wizard's Check Reference feature when you add a RID outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates. References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process. The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only. ACI INTERNATIONAL (ACI)ACI 301(2005; Errata 2008) Specifications for Structural ConcreteAMERICAN WATER WORKS ASSOCIATION (AWWA)AWWA D110(2004; Errata 2005) Wire- and Strand Wound, Circular, Prestressed Concrete Water TanksASTM INTERNATIONAL (ASTM)ASTM A 227/A 227M(2006) Standard Specification for Steel Wire, Cold-Drawn for Mechanical SpringsASTM A 416/A 416M(2006) Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed ConcreteASTM A 475(2003) Standard Specification for Zinc-Coated Steel Wire StrandASTM A 586(2004a) Standard Specification for Zinc-Coated Parallel and Helical Steel Wire Structural Strand and Zinc-Coated Wire for Spun-In-Place Structural StrandASTM A 603(1998; R 2003) Standard Specification for Zinc-Coated Steel Structural Wire RopeASTM A 648(2004a) Standard Specification for Steel Wire, Hard Drawn for Prestressing Concrete PipeASTM A 653/A 653M(2008) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip ProcessASTM A 821/A 821M(2005) Standard Specification for Steel Wire, Hard Drawn for Prestressing Concrete Tanks1.2 SYSTEM DESCRIPTION NOTE: AWWA D110 covers design and construction of wire- and strand-wound circular prestressed-concrete water-containing structures with the following three types of core walls: Type I -- cast-in-place concrete with vertical prestressing; Type II -- shotcrete with a steel diaphragm; Type III -- precast concrete with a steel diaphragm The type available varies in different parts of the country. Check with local contractors. Construct _{concrete water tank} AWWA D110, Type [I] [II] [III]. Provide tank, reinforced concrete floor slab, and roof. a. Roof live load [_____] kg per square meter psf. b. Allowable soil bearing pressure [_____] kPa psf, and equivalent lateral earth pressure [_____] kPa pcf. c. Wind load [_____], importance factor [_____]. [d. Seismic Zone [_____], importance factor [_____], and soil profile coefficient [_____].] 1.3 SUBMITTALS NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control. A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractor’s Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project. For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the "G" designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District Office (Engineering Division or other organization in the District Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office. Codes following the "G" typically are not used for Navy, Air Force, and NASA projects. Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are [for Contractor Quality Control approval.][for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES: _{SD-02 Shop Drawings Concrete water tank} AWWA D110, design-construct requirements, stamped by a professional engineer. _{SD-05 Design Data Design calculations SD-06 Test Reports Prestressing process records Leakage testing SD-10 Operation and Maintenance Data Concrete water tank}, Data Package 1 Submit in accordance with Section 01 78 23 OPERATION AND MAINTENANCE DATA. 1.4 QUALITY ASSURANCE 1.4.1 _{Design Calculations} AWWA D110, stamped by a professional engineer. PART 2 PRODUCTS 2.1 CONCRETE Section 03 30 00 CAST-IN-PLACE CONCRETE. 2.1.1 Floor and Footings Minimum 20 MPa 3000 psi 28 day strength. 2.1.2 Wall and Dome Roof Minimum 29 MPa 4000 psi 28 day strength. 2.2 SHOTCRETE Section 03 37 13 SHOTCRETE. Minimum 31 MPa 4500 psi 28 day strength or wall strength if greater. 2.2.1 Wire Coat Provide shotcrete consisting of not more than three parts sand to one part portland cement by volume. 2.2.2 Additional Coats Provide shotcrete consisting of not more than four parts sand to one part Portland cement by volume. 2.3 CEMENT MORTAR ACI 301. In cases where mortar is to be used to encase the waterstop, mortar shall consist of not more than three parts sand to one part portland cement by weight. 2.4 REINFORCING Galvanize all steel reinforcing. 2.4.1 Nonprestressed Reinforcement ACI 301. [2.4.1.1 Earthquake Cables ASTM A 416/A 416M, GRADE 250 OR 270, ASTM A 586, ASTM A 603. Provide zinc coating ASTM A 475, Table 4, class A, or ASTM A 603, Table 2, class A. ]2.4.1.2 Steel Sheet Diaphragms AWWA D110, galvanized ASTM A 653/A 653M, Z275 G90. 2.4.2 Prestressed Reinforcement AWWA D110 and ACI 301. In addition, ASTM A 648, ASTM A 227/A 227M, or ASTM A 821/A 821M. 2.5 ELASTOMERIC MATERIAL AWWA D110 for waterstops, bearing pads, sealer, [sponge filler] and seal coat. [2.6 DUCT MATERIAL AWWA D110. ]PART 3 EXECUTION 3.1 INSPECTION Ensure elevations of floor and footing excavation are within one-tenth foot of the indicated elevations and that excavation slopes are uniform and free of loose debris. Follow inspection procedures in accordance with AWWA D110 . 3.2 INSTALLATION Follow construction procedures in accordance with AWWA D110, with restrictions specified herein. a. Do not use curing compound except in conjunction with water curing. [b. AWWA D110, provide additional protection for reinforcing and prestressing strands for aggressive water conditions. [_____]]. 3.3 FIELD QUALITY CONTROL a. Keep _{prestressing process records} in accordance with AWWA D110. b. Perform _{leakage testing} in accordance with AWWA D110. 3.4 REPAIRS 3.4.1 Leakage Cracks Make repairs by pressure epoxy grouting in accordance with AWWA D110. Retest. 3.4.2 Honeycombed Concrete If allowed by QC Representative, remove defective concrete and replace with nonshrinking aggregate grout from Section 03 30 00 CAST-IN-PLACE CONCRETE. 3.5 BACKFILL Section 31 00 00 EARTHWORK for backfill requirements. Backfill after tank testing is successfully completed. Avoid unbalanced backfill placement.