A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A...
Transcript of A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A...
![Page 1: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/1.jpg)
Jamie Howard, Regional Manager
A Discussion on NFPA 22 (Chapter 10)- Concrete Gravity Tanks and Suction Tanks
![Page 2: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/2.jpg)
![Page 3: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/3.jpg)
![Page 4: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/4.jpg)
![Page 5: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/5.jpg)
AWWA D110 Storage Tanks
![Page 6: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/6.jpg)
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
Type IV: cast-in-place concrete with a steel diaphragm
AWWA D110 Storage Tank Types
![Page 7: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/7.jpg)
AWWA D110 Storage Tanks Benefits
* NFPA 22 COMPLIANT
* ARCHITECTURAL ENHANCEMENTS
* TANK SITING FLEXIBILITY
* NO OUT OF SERVICE TIME
* MAINTENANCE FREE
![Page 8: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/8.jpg)
CAPACITIES
• Large: 40 MG • Small: 80,000 Gallons
![Page 9: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/9.jpg)
• Large: 492 Feet • Small: 22 Feet
DIAMETERS
![Page 10: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/10.jpg)
• Tall: 100 Feet • Short: 10 Feet
HEIGHT
![Page 11: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/11.jpg)
• Basic • Aesthetic
ARCHITECTURAL TREATMENT
![Page 12: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/12.jpg)
• Buried • At Grade
BACKFILL
![Page 13: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/13.jpg)
QUESTIONS
• WHAT ARE A COUPLE STANDARDS THAT GOVERN DESIGN OF PRESTRESSED PRECAST CONCRETE TANKS?
• AWWA D110, ACI 350, AND ACI 372
• WHAT IS ONE DIFFERENCE BETWEEN A D110 TYPE I TANK AND A D110 TYPE III TANK?
• TYPE I DOESN’T INCLUDE A STEEL DIAPHRAGM SINCE IT HAS VERTICAL PRESTRESSING.
![Page 14: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/14.jpg)
• Differentially Buried • Multi-Use
BACKFILL
![Page 15: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/15.jpg)
• STEEL TANKS DO A GREAT JOB IF MAINTAINED PROPERLY
• TAKEN OUT OF SERVICE FOR REGULAR PAINTING CYCLES
• EVERY 15 YEARS
• REPLACE BOLTS/GASKETS, ETC.
• MULTIPLE TANKS SO ONE TANK CAN BE TAKEN OUT OF SERVICE FOR MAINTENANCE
• D110 TYPE III TANKS DO NOT NEED TO BE TAKEN OUT OF SERVICE FOR
REGULAR MAINTENANCE.
• REGULAR MAINTENANCE (IF DESIRED) INCLUDES POWER WASHING EXTERIOR
NO OUT OF SERVICE TIME/MAINTENANCE FREE(COST OF OWNERSHIP)
![Page 16: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/16.jpg)
• CONCRETE IS CORROSION RESISTANT AND STRONG IN COMPRESSION
• STEEL IS WATERTIGHT AND STRONG IN TENSION
• D110 TYPE III USES THE STRENGTHS OF EACH MATERIAL
• WATERTIGHT
• CORROSION RESISTANT
WHY CHOOSE CONCRETE OR STEEL?
![Page 17: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/17.jpg)
Precast Concrete Corewall
Embedded Steel Diaphragm
Multiple Layers of Wire Prestressing
Seismic Restraints
Flexible Floor-wall Connection
![Page 18: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/18.jpg)
AWWA D110 DESIGN AND CONSTRUCTION FEATURES
•FLOOR
•WALL
•PRESTRESSING
•ROOF
![Page 19: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/19.jpg)
•SITE PREPARATION
![Page 20: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/20.jpg)
•FLOOR REINFORCING AND PRECAST PANELS
![Page 21: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/21.jpg)
•FLOOR POUR
![Page 22: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/22.jpg)
TYPE III WALL•PRECAST ONSITE
•STEEL DIAPHRAGM WITHIN WALL
![Page 23: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/23.jpg)
•ONSITE WALL PRECASTING
![Page 24: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/24.jpg)
ONSITE PRECASTING BENEFITS
• HORIZONTAL, GROUND-LEVEL CASTING ALLOWS FOR DETAILED INSPECTION BY ALL PARTIES INVOLVED
• NO PANEL TRANSPORT TO SITE REQUIRED
• CONCRETE QUALITY IS TESTED AND ASSURED BEFORE PANEL BECOMES PART OF TANK STRUCTURE
• THE WORK IS PERFORMED LOCALLY BY DN TANKS
• LOCAL LABOR, MATERIALS AND EQUIPMENT
![Page 25: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/25.jpg)
•WALL ERECTION
![Page 26: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/26.jpg)
•WALL ERECTION
![Page 27: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/27.jpg)
•COVE
![Page 28: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/28.jpg)
•CLOSURE SLOTS
![Page 29: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/29.jpg)
PRESTRESSING
•SHOTCRETE BASE COATING
•MULTIPLE LAYERS OF WIRE WRAPPING
•SHOTCRETE COVERCOAT
![Page 30: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/30.jpg)
•WIRE WINDING
![Page 31: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/31.jpg)
210,000 PSI STRENGTH WIRE, PER ASTM A821
PRODUCES CORE-WALL COMPRESSION
• PRESTRESSING QUALITY CONTROL
![Page 32: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/32.jpg)
•SHOTCRETING
![Page 33: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/33.jpg)
QUESTIONS?
• WHAT FORCE IS APPLIED TO THE PRESTRESS WIRE?
• 140,000 PSI
• HOW IS THE PRESTRESS WIRE PROTECTED?
• BY THE ENCAPSULATION WITH THE SHOTCRETE
![Page 34: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/34.jpg)
ROOF TYPES
•CONCRETE DOME
![Page 35: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/35.jpg)
•PRECAST DOME ROOF
![Page 36: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/36.jpg)
•CAST-IN-PLACE DOME ROOF
![Page 37: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/37.jpg)
•FLAT SLAB-COLUMN SUPPORTED ROOF
![Page 38: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/38.jpg)
LARGE TANK HEATER PACKAGE
![Page 39: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/39.jpg)
CHROMALOX HEATING SYSTEM
![Page 40: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/40.jpg)
HEATER CONTROL PANEL
![Page 41: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/41.jpg)
ELECTRIC HEATER WITHIN TANK
![Page 42: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/42.jpg)
ELECTRICAL CONDUIT TO TANK HEATER
![Page 43: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/43.jpg)
TECHNICAL PROJECT SUPPORT
![Page 44: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/44.jpg)
ENGINEERING DESIGN
• SPECIFICATIONS
• CAD DRAWINGS
• TANK RENDERING
• Geotechnical Report Review
• Equipment Supplier Coordination
![Page 45: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/45.jpg)
• TANK BUDGET
• PROJECT SITE VISIT
• SITING OPTIONS
• Construction Layout
• Full Sitework Estimate
• Value Engineering
ESTIMATING & BUDGETING
![Page 46: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/46.jpg)
• CONSTRUCTION SCHEDULING
• EQUIPMENT LEAD TIME
• Work Coordination
SCHEDULING & COORDINATION
![Page 47: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/47.jpg)
![Page 48: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/48.jpg)
![Page 49: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/49.jpg)
QUESTONS?
• WHAT ARE SOME BENEFITS OF AWWA D110 TYPE III PRESTRESSEDPRECAST CONCRETE TANKS OVER STEEL
• NO NEED TO REPAINT OR MAINTAIN CATHODIC PROTECTION
• TANKS CAN BE BACKFILLED TO FIT THE SITE
• MANY OPTIONS FOR ARCHITECTURAL TREATMENTS
• LOWER ENERGY COSTS TO STAY ABOVE 42 DEGREES WITH THE WATER TEMPERATURE
![Page 50: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/50.jpg)
Bakersfield, CA
![Page 51: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/51.jpg)
Danville – Geisinger, PA
![Page 52: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/52.jpg)
London Grove, PA
![Page 53: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/53.jpg)
Raleigh, NC
![Page 54: A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity ......Jamie Howard, Regional Manager. A Discussion on NFPA 22 (Chapter 10) - Concrete Gravity Tanks and Suction Tanks](https://reader033.fdocuments.us/reader033/viewer/2022041504/5e242f781cced431967f52fa/html5/thumbnails/54.jpg)
Questions?