Foreword
I History of standard
II Information regarding use of this standard
III Information to be furnished by purchaser for an
elevated tank
IV Information to be furnished by purchaser for a
standpipe or reservoir
V Information to be furnished by bidder for an
elevated tank
VI Information to be furnished by bidder for a
standpipe or reservoir
VII Comment regarding design criteria for single-
pedestal elevated tanks
VIII Comment regarding appendix C
IX Major revisions
Standard
1 General
1.1 Scope
1.2 Definitions
1.3 Guarantee
1.4 Drawings to be furnished
1.5 Referenced standards
2 Materials
2.1 General
2.2 Material specifications
3 General design
3.1 Design loads
3.2 Unit stresses
3.3 Combined stresses
3.4 Column and strut formulas
3.5 Roof and top shell girder and intermediate
stiffeners
3.6 Roof supports
3.7 Cylindrical shell plates
3.8 Foundation bolts
3.9 Corrosion allowance
3.10 Minimum thickness
3.11 Joints
3.12 Weld design values
3.13 Reinforcement around openings
4 Sizing and design of elevated tanks
4.1 Standard capacities
4.2 Heights for elevated tanks
4.3 Standard ranges of head
4.4 Columns and struts
4.5 Tension members carrying wind and earthquake
loads
4.6 Pinholes
4.7 Horizontal girders
4.8 Tank plates
4.9 Steel riser pipe
4.10 Tank stability against overturning
4.11 Pedestal tank slenderness
4.12 Pedestal supports
4.13 Eccentric load
4.14 Lateral load distribution
4.15 High slender tanks
5 Accessories for elevated tanks
5.1 Steel riser pipe
5.2 Pipe connection
5.3 Overflow
5.4 Ladders
5.5 Safety devices
5.6 Roof openings
5.7 Vent
5.8 Additional accessories and exceptions
6 Sizing of standpipes and reservoirs
6.1 Standard capacities
6.2 Shell heights for standpipes
6.3 Diameters for reservoirs
7 Accessories for standpipes and reservoirs
7.1 Shell manholes
7.2 Pipe connections
7.3 Overflow
7.4 Ladders
7.5 Safety devices
7.6 Roof openings
7.7 Vent
7.8 Additional accessories and exceptions
8 Welding
8.1 Definitions and symbols
8.2 Qualification of welding procedures, welders, and
welding operators
8.3 Butt joints
8.4 Lap joints
8.5 Flat tank bottoms resting directly on grade or
foundation
8.6 Shell-to-bottom joints
8.7 Roof plates
8.8 Maximum thickness of material to be welded
8.9 Minimum laps for welded lap joints
8.10 Minimum size of fillet and seal welds
8.11 Minimum length of welds
8.12 Intermittent welding
8.13 Safety in welding and cutting
8.14 Safe usage of cutting and welding processes
9 Shop fabrication
9.1 Workmanship
9.2 Laying out
9.3 Straightening
9.4 Finish of plate edges - welded work
9.5 Rolling
9.6 Double-curved plates
9.7 Milling of columns
9.8 Shop assembly
9.9 Shipping
10 Erection
10.1 General
10.2 Welds
10.3 Preparation of surfaces to be welded
10.4 Preheating and interpass temperature
10.5 Low-hydrogen electrodes
10.6 Tack welds
10.7 Tank assembly
10.8 Matching plates
10.9 Grouting of column and riser bases
10.10 Cleanup
11 Inspection and testing
11.1 Mill or shop inspection
11.2 Field inspection
11.3 Welders' credentials
11.4 Inspection of welded joints
11.5 Number and location of radiographs or sectional
segments
11.6 Procedures for inspection of welded-shell butt
joints for which complete joint penetration is
specified - radiographic testing
11.7 Procedure for inspection of welded joints by
removal of sectional segments
11.8 Inspection by air carbon arc gouging
11.9 Methods for closing of openings
11.10 Repair of defective welds
11.11 Testing
11.12 Field painting and disinfecting
12 Foundation design
12.1 General requirements
12.2 Soil-bearing value
12.3 Factor of safety
12.4 Foundations for braced elevated tanks
12.5 Foundations for single-pedestal tanks
12.6 Foundations for flat-bottom tanks
12.7 Detail design of foundations
12.8 Concrete design, materials, and construction
12.9 Backfill
13 Seismic design of water storage tanks
13.1 General
13.2 Seismic design categories
13.3 Seismic design loads
13.4 Local seismic data
13.5 Piping connections for flat-bottom tanks
13.6 Foundation design
13.7 Specification sheets for seismic data and
examples
13.8 Reference
Appendices
A Metric (SI) equivalents
B Diagrams for checking overturning of elevated
tanks
C Alternative rules and design stresses for the use
of steel plates and shapes with suitable
toughness and ductility for use in welded
standpipes and reservoirs at specified minimum
ambient temperatures
C.1 Alternative design basis
C.2 Materials
C.3 General design
C.4 Inspection
C.5 Certification of compliance
NUMEROUS TABLES
NUMEROUS FIGURES