Attachment 12 - Revised Design Narrative and Option Descriptions.pdf

REPLACE STEAM BOILERS

Northern Arizona VA Health Care System

649-22-104

Design Narrative & Option Descriptions – CD Set 06/29/2026

I. Project Summary (Executive Summary)

Useful Life Expectancy:

The useful life expectancy of the existing Water Tube boilers is 40 years. The existing campus steam boilers were manufactured and installed in 1975 approaching 46 years and are past their useful life. Boilers, condensate and DA tanks completed a useful life study in September 2024 with a satisfactory condition report for continued utilization. The associated plant PRV station and its associated valves, traps and specialties are beyond their useful life expectancy.

The boiler plant header isolation valves, traps and warmup bypass valves are beyond their useful life expectancy. The boiler plant has been well maintained and safety device tested per the September 15-17, 2020 Boiler Plant Safety Device Training and Testing were 87% compliant.

This project will correct the below deficiencies:

• Replace boilers (economizers) and controls.

• Replace plant piping (with hangers / support), PRV and header.

• Replace deaerator, condensate and flash tanks.

• Replace condensate transfer pump, chemical feed pumps, water feed pumps, sump pumps and generator fuel pump.

• Replace gas fuel train.

• Replace electric, gas and steam meters.

• Construct new control room, with view for all boiler fronts.

• Add boiler lacking lockout / tagout capabilities.

• Install new MCC.

• Add fire suppression to plant.

• Install combustible gas monitoring near boiler plant roof.

• Remove ACM in boiler building.

• Install automatic chemical feed system.

• Add fire suppression to plant.

• Construct secondary means of egress from mezzanine.

• Replace roof membrane, near end-of-life expectancy.

• Replace roof exhaust fans.

• Install telecommunications enclosure.

• Replace fluorescent lighting with LED.

• Replace and expand air intake louvers.

• Add HVAC to control room.

• Replace windows and doors.

• Mezzanine flooring to be replaced.

Below deficiencies are not in project scope:

• Water softeners – New, resized softeners have been replaced 20th August 2025.

• Overhead paging – Addressed on separate contract.

• Air compressors - To be addressed in separate contract.

• Signage – To be addressed in separate contract.

Design Conditions:

The ASHRAE 99.6% winter outdoor design temperature for Prescott Arizona per the HVAC Design Manual (2019), is 17.7 degrees F. The 0.4% summer design temperature is 94.4 degrees F. Historical hourly load data from the boiler plants calibrated flow meters is summarized in Section V. of this report were utilized to determine maximum steam loads.

Existing Conditions:

The three existing boilers are each 12,000 LBS/HR, 350 BHP, High Pressure Water Tube boilers. Manufactured by E.Keeler Co., S.W.P. 200, W.W.H.S. 255, and B.H.S. 1,475. The total N capacity with two of the three boilers in operation is 24,000 LBS/HR with the third boiler an additional +1 of 12,000 LBS/HR. Boiler #1 burner has been modified to provide a slightly reduced capacity and is utilized during summer months of low load.

BOILER NAME PLATES

The boiler plant is currently being operated to provide 70 psig high pressure steam to the plant steam header. The 70 psig header has maintained 35 psig to the distribution system. The associated plant PRV station and its associated valves, traps and specialties are beyond their useful life expectancy. The boiler plant header isolation valves, traps and warmup bypass valves are beyond their useful life expectancy.

EXISTING 1/3-2/3 PRV STATION

EXISTING STEAM HEADER

Existing chart recorders have been abandoned and replaced with electronic indication. Control panels are outdated and in need of replacement. The existing control panels shown below will be removed and replaced with new boiler controls with a BACnet reporting interface to the new plant BAS system. The existing gas monitoring system has been upgraded and can be reused and modified to relocate the existing flammable sensors. The existing stack economizers are newer than the boilers but will be replaced with new units to match the new boiler capacities.

EXISTING PLANT CENTRAL CONTROL PANEL

EXISTING GAS MONITORING EXISTING BOILER CONTROL EXISTING STACK ECONOMIZER

During the 35% review, it became apparent that the existing Deaerator, DA tank, and Chemical Feed Systems needed to be added to the design. These items are past or close to life expectancy and were important to include in this scope of work to minimize down time and future down time to install and update these systems. This will also reduce the VA overall construction costs to include in this project.

The Deaerator, DA tank, and Chemical Feed Systems were sent out as a change order and approved to be part of the scope of work on this project.

During the 95% review, the team realized the following deficiencies for the boiler plant. No fire suppression in the control room. No secondary egress from mezzanine. Roof membrane needs to be replaced. Lockout / tagout capabilities lacking on existing valves and equipment. The Communications closet did not meet VA design guide requirements. The existing boiler blowdown tank and ventilation exhaust fans were also found to be past their useful life. The design was then updated to accommodate said deficiencies.

Fire Safety:

This project is to add a fire riser and fire suppression system to the control room for the Boiler Plant. This will tap into the existing 6 inch domestic waterline that has an existing 80 PSI. This is a small area that will not require much pressure or water flow. This fire suppression system will include flow valves, monitoring monitors, and adding monitoring into the existing fire alarm control panel for the fire suppression system.

Based on previous comments an Extra Hazard Group 2 (EH2) occupancy is the most demanding area for the project. From NFPA 13, and EH2 occupancy requires a density of 0.40 gpm/sq.ft. over 2500 sq.ft.

for a water demand of 1000 gpm. Adding a safety factor (1.3) and a hose stream of 500 gpm the total anticipated demand is 1800 gpm. Using 6” PVC Class 200 at 1800 gpm and approximately 75’ length we can expect a pressure loss of 8.5 psi. The latest water flow test information provided indicates 130 psi static available near the project site. Based on this information a 6” minimum fire line should be sufficient to support the project fire suppression system.

Hazardous Material Abatement:

The current 100% design submittal identifies several feet of existing piping and all associated fittings, supports and hangars requiring demolition, removal, and disposal off site to make way for the installation of the new proposed piping, fittings, accessories, supports, instrumentation, and insulation. Additional scope to demolish steam and steam condensate return piping has been added. We have included drawings that define the scope of work and demolition required.

Any additional asbestos that may be encountered during construction would require we set aside as a contingency a sum of funds to cover the costs of this unforeseen abatement should it occur. Our design documents will require the Contractor to randomly sample specific suspect materials prior to demolition to confirm no ACBM’s are present.

The VA standard for testing existing materials will be followed. We will require the general contractor to test all insulations, and/or suspicious materials before demolition begins.

Required Boiler Capacity:

From section VI below the calculated required steam load for the facility assuming a 10% growth factor is 13,970 lbs/hr or approximately N=400 BHP. During the summer months the load decreases to 6,380 lbs/hr or approximately 200 BHP.

In conclusion the existing boiler system is oversized and the boilers are beyond their life expectancy. The recommended replacement is and will be three 300 BHP boilers to meet the N+1 requirement.

Recommended Options:

This project will provide the VA with new safe and reliable high pressure natural gas – fuel oil steam boilers that meet the required VHA safe operating requirements and safety device testing requirements.

These new boilers will be safe, reliable, and efficient at a good cost to the government.

II. Applicable Standards

The design will comply with the latest adopted edition of all applicable codes and standards including, but not limited to:

• VA Directives and Design Manuals:

o PG-18-1 Master Construction Specifications, 2004 o PG-18-3 Design and Construction Procedures, 2020 o PG-18-4 Standard Details and CAD Standards, 2008 o PG-18-10:

2014 Architectural Design Manual 2019 Electrical Design Manual 2015 Fire Protection Design Manual 2017 HVAC Design Manual 2020 Interior Design Manual 2015 Lighting Design Manual 2020 Physical Security & Resiliency Design Manual (Life Safety Protected

Facilities) 2018 Plumbing Design Manual 2014 Structural Design Manual o Infrastructure Standard for Telecommunications Space o Directive 1810 – Boiler and Boiler Plant Operations o Boiler and Associated Plant Safety Device Testing Manual, Seventh Edition o Steam, Heating Hot Water, and Outside Distribution Systems Design Manual

• 2018 International Building Code (IBC) including International Mechanical and Plumbing Codes (Only when specifically referenced in VA Design Documents, see notes below)

• 2018 NFPA 101 Life Safety Code (see notes below)

• 2018 NFPA National Fire Codes with the exception of NFPA 5000 and NFPA 900.

• 2023 NFPA 85, Boiler and Combustion Systems Hazards Code

• Occupational, Safety and Health Administration (OSHA) Standards

• VA Seismic Design Requirements, H‐18‐8

• National Electrical Code (NEC)

• IEEE C2-2017 National Electrical Safety Code (NESC)

• International Plumbing Code (IPC)

• ASME Boiler and Pressure Vessel Code

• ASME Code for Pressure Piping

• 2015 Architectural Barriers Act Accessibility Standards (ABAAS) including VA Supplement, Barrier Free Design Guide (PG-18-13)

• Building Code Requirements for Reinforced Concrete, American Concrete Institute and Commentary (ACI 318)

• Manual of Steel Construction, Load and Resistance Factor Design Specifications for Structural Steel Buildings, American Institute of Steel Construction (AISC)

• Energy Policy Act of 2005 (EPAct)

• DOE Interim Final Rule: Energy Conservation Standards for New Federal, Commercial and Multi-Family High-Rise Residential Buildings and New LowRise Residential Buildings, 10 CFR Parts 433, 434 and 435.

• Federal Leadership in High Performance and Sustainable Buildings: Memorandum of Understanding (MOU)

• Executive Order 13423: Strengthening Federal Environmental, Energy, and Transportation Management

• The Provisions for Construction and Safety Signs to be stated in the General Requirements, Section 01 00 00, of the VA Construction Specifications

• Ventilation for Acceptable Indoor Air Quality – ASHRAE Standard 62.1- 2004.

• Electrical Standards – ASHRAE Standard 90.1

• IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems

• ASHRAE 55

• ASHRAE 62

• Occupational, Safety and Health Administration (OSHA) Standards

• VA Seismic Design Requirements, H‐18‐8 (2019)

• Building Code Requirements for Reinforced Concrete, American Concrete Institute and Commentary (ACI 318-14)

• TMS 402-16 Building code requirements & Specifications for Masonry

• Manual of Steel Construction, Load and Resistance Factor Design Specifications for Structural Steel Buildings, American Institute of Steel Construction (AISC)

NOTES:

1. NFPA 101 primarily addresses life safety and fire protection features while the IBC addresses a wide range of considerations, including, but not limited to, structural strength, seismic stability, sanitation, adequate light and ventilation, and energy conservation. VA buildings must meet the requirements of NFPA 101 and documents referenced by NFPA 101 in order to comply with the accreditation requirements of The Joint Commission. Therefore, designs shall comply with the requirements of the latest edition of NFPA 101 and documents referenced therein. Design features not addressed by NFPA 101 or documents referenced therein shall comply with the requirements of the latest edition of the IBC or as otherwise addressed above in this Program Guide. For design features that are addressed by both the IBC as well as NFPA 101 or a document referenced by NFPA 101, the requirements of NFPA 101 or the document referenced by NFPA 101 shall be used exclusively (this applies even if the IBC requirements are different). VHA PROGRAM GUIDE PG-18-3 September 2013 3 of 3

2. Conflicts between Nationally Recognized Codes and Standards and VA Requirements – Should a conflict exist between VA requirements and VA adopted nationally recognized codes and standards, the conflict shall be brought to the attention of VA. The resolution of the conflict shall be made by the authority having jurisdiction for VA to ensure a consistency system wide.

III. Design – Boilers

a. Rent two skid or trailer natural gas/ diesel 250 BHP and one 200 BHP temporary boilers.

Temporary boilers to be located exterior to the boiler plant. Connect 100 PSI steam piping to plant distribution piping, condensate return, natural gas, diesel and feed water systems.

Provide temporary office (Legacy Modular Building 12’x40’ with restroom or equivalent), A prefabricated stair and deck assembly system with guard rails shall then be installed.

Security Cameras and lighting shall be provided on temporary boilers and temporary control room.

b. Install piping, drainage, and electrical for temporary skid boilers. Two 250 BHP boilers 100psig.

c. Remove all ACM for the affected work area.

d. Install new steam and condensate return piping insulation.

e. Remove and replace existing boiler plant wall, window and catwalk to allow removal of existing and installation of new boilers.

f. After the Temporary boilers are operational and during low load summer months, remove existing boilers #1, #2 and #3 and associated stack economizers, deaerator, condensate storage tank, two condensate transfer pumps, two sump pumps and three automatic chemical feeders. Keep boiler 3 in service while replacing all the piping, catwalks, and boilers 1 and 2 demolition. This is to reduce time and costs.

g. Removal of abandoned condensate vacuum pump system and associated condensate return piping from existing boiler plant.

h. Install replacement of existing boiler plant 1/3 – 2/3 PRV system. Sequence work to minimize down time.

i. Install replacement of existing boiler plant header Isolation valves.

j. Modify existing gas detection system as necessary to allow for testing from ground level while gas detectors shall remain at roof level.

k. Install new steam, feedwater, makeup and natural gas metering.

l. Replace the electrical generator sub tank with a double walled sub tank. Install new electrical MCC, panels, and all associated circuits and equipment disconnects.

m. Replace lighting fixtures with LED, high efficiency light fixture.

n. Replace doors and provide new access control on two of the doors.

o. Provide CCTV per the VA standards, campus standards.

p. Remove local and central control systems for boilers #1, #2 and #3.

q. Install three new 300 BHP high pressure steam boilers and associated stack economizers, new deaerator, new condensate storage tank, two new condensate transfer pumps, two new sump pumps and three new automatic chemical feeders.

r. Install new louvers in wall with steam radiator to heat intake air as needed. Louvers have been sized to meet VA requirements for ventilation air and combustion air.

s. Replace four existing boiler room exhaust fans to provide adequate ventilation air to boiler plant. Calculations for sizing can be found on ME601.

t. Extend existing generator flue to upper roof area.

u. Replace existing boiler blowdown tank.

v. Replace existing evaporative cooling unit in control room with split system DX heat pump unit.

w. Install new boiler controls with associated LCD MMI in local panel. Include required safety device testing requirements. Include interface to existing BAS supervision.

x. Install new operator work stations with controls software interface and graphics for all three new boilers.

y. Change the boiler door swing.

z. Install wall and door to tunnel.

aa. Install E-Stops on egress doors

bb. After new boilers are on line, provide third party certification of new plant safety devices including lockout tagout procedures.

cc. Remove rental boilers piping and electrical, temporary stair and deck assembly with guard rails, and temporary modular office.

dd. Remove existing window, masonry wall, and concrete stem wall for placement of boilers.

Reinstall window and rebuild masonry wall and concrete stem wall once boilers have been installed within the building.

ee. Provide temporary raised floor for boiler install, remove temporary floor after boilers are in place.

ff. Dismantle the existing catwalk steel beams columns etc. to allow for placement of new boiler and removal of old. Tag or track locations of catwalk elements for reassembly.

PLUS:

• Construction duration.

• Minimal campus steam system down time.

MINUS:

• Cost for boiler rental and piping.

• Additional boiler control systems and safety devices.

IV. Other Design Elements

a. Replace the existing roofing membrane.

b. Provide roof top fall protection. Provide non penetrating system.

c. Provide emergency new egress from mezzanine level to ground. Provide new door opening through existing window. Remove and reconfigure window opening to accept new door/window.

d. Provide steel HSS column door frame and out-of-plane window support.

e. Provide new steel stair at new egress. Provide steel channel stringers, beams, and columns.

f. Provide grating stairs tread and landing.

g. Provide guard rails and handrails for new stair.

h. Provide reinforced concrete footings. Patch and repair asphalt as needed.

i. Replace flooring throughout the mezzanine. New LVT shall be installed in the mezzanine office, and LVT shall be installed throughout the rest for the mezzanine.

j. Remove four windows in the control room and patch existing wall with brick to match existing.

k. Replace the remaining windows in the control room.

l. Remove the exterior door to the control room and replace it with a new door that swings out of the building.

m. Replace door between control room and boiler room with fully glazed door to optimize visibility.

n. Floor has been extended over a portion of the pit to facilitate an expansion of the control room to provide adequate site lines to all of the boilers.

o. Remove the existing door and adjacent portion of the wall separating the control room from the boiler space. Install new steel HSS columns and a double-angle steel header beam to support the modified opening.

p. Install new concrete topping over the new steel deck in the pit area north of the control room. Extend the control room footprint into this area. Construct new walls using metal studs with gypsum board, matching the finish of the existing control room. Relocate the existing catwalk and railing as necessary to accommodate the revised room layout.

q. Add a wall and door to the utility tunnel from the lower-level pump room.

r. Provide exterior roof access ladders to the three lower roofs.

s. Add fire suppression system to control room.

t. Add new enclosed telecommunications rack to the control room, update the power and HVAC to the space to meet the telecommunications requirements for Boiler.

u. Run new fiber lines to the building to meet ISTS requirements.

v. Update valves and disconnects to equipment that are lockable for lockout / tagout compatibility.

V. Historical Steam Load

Hourly maximum winter steam loads at the 99.6% outdoor winter design temperature for Prescott Arizona VA (17.7F), “HVAC Design Manual May 1, 2019”, for the winters of 2019 through 2021 are summarized in the following Boiler Plant Hourly Maximum tables. Boiler Plant calibrated steam meters recorded hourly steam consumption logs are utilized for the summarized data. Winter outdoor air temperatures (O.A.T.), near or below the design temperature are shown with the concurrent steam loads highlighted. Winter steam loads represent a single boiler in operation with a second boiler at idle operating at 70-75 psi header pressure.

• 1/31/2021 12,700 lb/hr steam.

• 2/12/2020 12,100 lb/hr steam.

• 2/20/2019 12,100 lb/hr steam.

Hourly maximum and minimum summer steam loads at the 0.4% outdoor summer design temperature for Prescott Arizona VA (94.4F), “HVAC Design Manual May 1, 2019”, for the summers of 2019 through 2021 are summarized in the following Boiler Plant Hourly Maximum/Minimum tables. Boiler Plant calibrated steam meters recorded hourly steam consumption logs are utilized for the summarized data. Summer outdoor air temperatures (O.A.T.), near or above the design temperature are shown with the concurrent steam loads highlighted. Summer steam loads represent a single boiler in operation with a second boiler at idle operating at 70-75 psi header pressure.

• 6/3/2021 5,800 lb/hr steam maximum. 6/29/2021 1,500 lb/hr minimum.

• 6/20/2020 5,800 lb/hr steam maximum. 8/28/2020 2,000 lb/hr minimum.

• 7/15/2019 5,000 lb/hr steam maximum. 8/15/2019 1,400 lb/hr minimum.

The 2020 hourly data included recent building additions to the campus with a maximum daily load of 254 Mlbs of steam and a maximum hourly steam load of 12.3 Mlbs/hr.

Table 1

O.A.T. (F) O.A.T. (F) O.A.T. (F) O.A.T. (F)

1/1/2021 18.0 11.0 2/1/2021 10.5 3/1/2021 18.0 11.7 4/1/2021 8.7

1/2/2021 11.8 2/2/2021 10.0 3/2/2021 11.6 4/2/2021 7.0

1/3/2021 11.5 2/3/2021 9.1 3/3/2021 11.2 4/3/2021 7.9

1/4/2021 11.4 2/4/2021 10.2 3/4/2021 10.0 4/4/2021 8.2

1/5/2021 10.9 2/5/2021 10.9 3/5/2021 10.3 4/5/2021 8.3

1/6/2021 10.9 2/6/2021 25.0 12.7 3/6/2021 9.2 4/6/2021 7.1

1/7/2021 11.4 2/7/2021 10.6 3/7/2021 9.1 4/7/2021 8.3

1/8/2021 11.2 2/8/2021 11.6 3/8/2021 8.5 4/8/2021 8.0

1/9/2021 10.7 2/9/2021 9.6 3/9/2021 9.6 4/9/2021 31.0 8.9

1/10/2021 17.0 11.3 2/10/2021 9.6 3/10/2021 8.8 4/10/2021 7.6

1/11/2021 18.0 11.8 2/11/2021 9.5 3/11/2021 10.0 4/11/2021 7.6

1/12/2021 13.0 12.5 2/12/2021 9.5 3/12/2021 9.9 4/12/2021 8.3

1/13/2021 11.2 2/13/2021 9.6 3/13/2021 10.9 4/13/2021 7.3

1/14/2021 10.5 2/14/2021 9.6 3/14/2021 10.6 4/14/2021 8.0

1/15/2021 11.6 2/15/2021 11.0 3/15/2021 10.2 4/15/2021 8.2

1/16/2021 10.5 2/16/2021 10.1 3/16/2021 10.9 4/16/2021 7.5

1/17/2021 11.7 2/17/2021 11.7 3/17/2021 11.0 4/17/2021 7.9

1/18/2021 10.9 2/18/2021 18.0 11.6 3/18/2021 10.0 4/18/2021 8.0

1/19/2021 9.7 2/19/2021 11.2 3/19/2021 10.0 4/19/2021 8.0

1/20/2021 10.4 2/20/2021 10.0 3/20/2021 8.7 4/20/2021 7.2

1/21/2021 9.2 2/21/2021 10.2 3/21/2021 9.6 4/21/2021 7.3

1/22/2021 9.1 2/22/2021 11.1 3/22/2021 10.4 4/22/2021 6.9

1/23/2021 10.1 2/23/2021 10.7 3/23/2021 9.4 4/23/2021 6.8

1/24/2021 10.7 2/24/2021 8.9 3/24/2021 9.5 4/24/2021 7.8

1/25/2021 11.6 2/25/2021 10.5 3/25/2021 9.6 4/25/2021 6.9

1/26/2021 11.9 2/26/2021 11.4 3/26/2021 10.1 4/26/2021 7.2

1/27/2021 5.0 11.9 2/27/2021 9.6 3/27/2021 11.0 4/27/2021 7.8

1/28/2021 18.0 12.6 2/28/2021 10.7 3/28/2021 10.2 4/28/2021 8.3

1/29/2021 10.6 3/29/2021 9.0 4/29/2021 7.8

1/30/2021 17.0 12.0 3/30/2021 9.0 4/30/2021 7.6

1/31/2021 18.0 12.7 3/31/2021 10.3

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Date

Maximum

Hourly

Steam

Mlbs

Maximum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs

Janurary 12.7 Feburary 12.7 March 11.7 April 8.9

Boiler Plant Hourly Maximum 2021

Date

Table 2

O.A.T. (F) O.A.T. (F) O.A.T. (F)

6/1/2021 5.4 3.4 7/1/2021 5.0 90.0 2.9 8/1/2021 5.1 3.5

6/2/2021 4.7 3.4 7/2/2021 4.8 3.3 8/2/2021 5.2 3.6

6/3/2021 5.8 94.0 3.2 7/3/2021 4.7 3.4 8/3/2021 5.0 94.0 3.5

6/4/2021 5.7 95.0 3.4 7/4/2021 4.9 3.5 8/4/2021 4.6 98.0 3.7

6/5/2021 5.3 93.0 3.4 7/5/2021 5.3 95.0 3.0 8/5/2021 5.7 96.0 2.2

6/6/2021 5.7 3.5 7/6/2021 5.2 100.0 3.3 8/6/2021 4.8 93.0 3.3

6/7/2021 5.5 3.7 7/7/2021 5.8 101.0 3.0 8/7/2021 5.0 93.0 3.5

6/8/2021 5.3 3.7 7/8/2021 4.3 99.0 3.0 8/8/2021 5.8 93.0 3.5

6/9/2021 5.6 3.8 7/9/2021 5.2 105.0 3.3 8/9/2021 5.2 93.0 3.5

6/10/2021 5.3 3.8 7/10/2021 4.6 105.0 3.5 8/10/2021 5.0 3.9

6/11/2021 5.4 3.5 7/11/2021 4.6 103.0 3.3 8/11/2021 5.0 3.6

6/12/2021 5.5 97.0 3.5 7/12/2021 5.0 96.0 3.3 8/12/2021 5.2 3.7

6/13/2021 4.9 96.0 3.1 7/13/2021 4.9 94.0 3.2 8/13/2021

6/14/2021 4.7 103.0 2.4 7/14/2021 4.5 3.5 8/14/2021

6/15/2021 4.1 105.0 3.0 7/15/2021 5.1 3.5 8/15/2021

6/16/2021 4.3 102.0 3.1 7/16/2021 4.6 3.6 8/16/2021

6/17/2021 4.9 104.0 3.1 7/17/2021 4.7 3.5 8/17/2021

6/18/2021 4.8 103.0 3.3 7/18/2021 4.7 3.6 8/18/2021

6/19/2021 5.0 98.0 3.2 7/19/2021 5.0 3.5 8/19/2021

6/20/2021 5.7 101.0 3.1 7/20/2021 4.8 3.6 8/20/2021

6/21/2021 5.4 94.0 3.0 7/21/2021 5.2 3.6 8/21/2021

6/22/2021 4.2 96.0 3.3 7/22/2021 5.1 3.5 8/22/2021

6/23/2021 5.0 3.1 7/23/2021 5.4 3.4 8/23/2021

6/24/2021 4.9 3.7 7/24/2021 5.8 3.8 8/24/2021

6/25/2021 5.1 3.6 7/25/2021 4.9 3.7 8/25/2021

6/26/2021 5.5 2.5 7/26/2021 5.3 3.8 8/26/2021

6/27/2021 5.6 94.0 3.1 7/27/2021 5.1 3.5 8/27/2021

6/28/2021 5.6 93.0 3.4 7/28/2021 5.3 3.4 8/28/2021

6/29/2021 4.4 86.0 1.5 7/29/2021 5.0 3.3 8/29/2021

6/30/2021 6.3 80.0 2.3 7/30/2021 5.0 3.8 8/30/2021

7/31/2021 5.2 3.9 8/31/2021

Outdoor

0.4%

(94.4F)

Outdoor

0.4%

(94.4F)

Outdoor

0.4%

(94.4F)

Boiler Plant Summer Hourly Maximum/Minimum 2021

Date

Minimum

Hourly

Steam

Mlbs Date

Minimum

Hourly

Steam

Mlbs

Minimum

Hourly

Steam

MlbsDate

June 1.5 July 2.9 August 2.2

Maximum

Hourly

Steam

Mlbs

Maximum

Hourly

Steam

Mlbs

Maximum

Hourly

Steam

Mlbs

6.3 5.8 5.8

Table 3

1/1/2020 11.9 2/1/2020 10.0 3/1/2020 8.0 12/1/2020 11.1

1/2/2020 11.1 2/2/2020 10.1 3/2/2020 10.0 12/2/2020 19.0 11.5

1/3/2020 11.7 2/3/2020 19.0 10.1 3/3/2020 9.8 12/3/2020 19.0 10.8

1/4/2020 11.5 2/4/2020 14.0 11.9 3/4/2020 9.9 12/4/2020 16.0 12.0

1/5/2020 11.5 2/5/2020 12.0 12.3 3/5/2020 9.6 12/5/2020 10.8

1/6/2020 11.3 2/6/2020 12.3 3/6/2020 9.6 12/6/2020 11.1

1/7/2020 12.0 2/7/2020 10.7 3/7/2020 8.9 12/7/2020 11.4

1/8/2020 11.7 2/8/2020 9.9 3/8/2020 8.8 12/8/2020 10.5

1/9/2020 10.1 2/9/2020 9.9 3/9/2020 9.4 12/9/2020 11.0

1/10/2020 13.0 12.0 2/10/2020 9.3 3/10/2020 8.9 12/10/2020 10.1

1/11/2020 19.0 11.3 2/11/2020 9.7 3/11/2020 8.3 12/11/2020 10.2

1/12/2020 11.5 2/12/2020 18.0 12.1 3/12/2020 8.4 12/12/2020 10.5

1/13/2020 10.6 2/13/2020 11.1 3/13/2020 10.3 12/13/2020 13.0 11.3

1/14/2020 10.5 2/14/2020 10.8 3/14/2020 9.1 12/14/2020 10.4

1/15/2020 11.4 2/15/2020 10.5 3/15/2020 9.5 12/15/2020 18.0 11.0

1/16/2020 10.3 2/16/2020 9.7 3/16/2020 9.2 12/16/2020 18.0 11.6

1/17/2020 9.9 2/17/2020 10.6 3/17/2020 8.3 12/17/2020 11.0

1/18/2020 11.4 2/18/2020 9.9 3/18/2020 10.4 12/18/2020 11.6

1/19/2020 11.0 2/19/2020 9.6 3/19/2020 10.1 12/19/2020 18.0 11.3

1/20/2020 9.8 2/20/2020 9.7 3/20/2020 10.1 12/20/2020 10.6

1/21/2020 9.7 2/21/2020 9.4 3/21/2020 9.5 12/21/2020 10.9

1/22/2020 9.8 2/22/2020 9.1 3/22/2020 9.3 12/22/2020 25.0 12.2

1/23/2020 10.2 2/23/2020 9.6 3/23/2020 9.2 12/23/2020 11.1

1/24/2020 10.6 2/24/2020 9.9 3/24/2020 10.2 12/24/2020 16.0 11.7

1/25/2020 10.7 2/25/2020 10.7 3/25/2020 7.9 12/25/2020 11.2

1/26/2020 10.2 2/26/2020 10.9 3/26/2020 9.0 12/26/2020 10.4

1/27/2020 10.1 2/27/2020 10.2 3/27/2020 10.1 12/27/2020 10.7

1/28/2020 10.6 2/28/2020 9.6 3/28/2020 25.0 10.7 12/28/2020 10.9

1/29/2020 9.7 2/29/2020 9.5 3/29/2020 9.0 12/29/2020 11.0

1/30/2020 11.3 3/30/2020 9.4 12/30/2020 17.0 11.6

1/31/2020 10.9 3/31/2020 8.7 12/31/2020 11.9

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Boiler Plant Hourly Maximum 2020

Date Date Date

Maximum

Hourly

Steam

Mlbs

Janurary 12.0 Feburary 12.3

Maximum

Hourly

Steam

Mlbs

Maximum

Hourly

Steam

Mlbs

March 10.7 December 12.2

Date

Maximum

Hourly

Steam

Table 4

6/1/2020 5.8 90.0 2.9 7/1/2020 5.0 2.5 8/1/2020 4.0 98.0 2.5

6/2/2020 4.8 59.0 2.4 7/2/2020 4.7 2.5 8/2/2020 4.3 94.0 2.5

6/3/2020 5.0 96.0 2.8 7/3/2020 4.5 2.6 8/3/2020 4.0 96.0 2.5

6/4/2020 4.4 62.0 2.4 7/4/2020 5.1 94.0 2.7 8/4/2020 4.0 94.0 2.6

6/5/2020 4.9 90.0 2.7 7/5/2020 5.9 96.0 2.8 8/5/2020 4.1 2.7

6/6/2020 5.6 3.1 7/6/2020 4.5 96.0 2.7 8/6/2020 4.1 2.8

6/7/2020 7.6 78.0 3.1 7/7/2020 5.2 94.0 2.3 8/7/2020 3.9 2.6

6/8/2020 5.9 3.3 7/8/2020 4.9 94.0 2.5 8/8/2020 4.2 94.0 2.5

6/9/2020 5.5 3.1 7/9/2020 3.8 96.0 2.5 8/9/2020 3.8 95.0 2.6

6/10/2020 4.5 3.3 7/10/2020 5.2 96.0 2.4 8/10/2020 4.4 95.0 2.6

6/11/2020 5.4 2.6 7/11/2020 4.3 97.0 2.7 8/11/2020 4.4 95.0 2.5

6/12/2020 5.9 2.7 7/12/2020 3.9 102.0 2.5 8/12/2020 3.5 96.0 2.4

6/13/2020 5.1 3.3 7/13/2020 4.2 98.0 2.4 8/13/2020 3.5 100.0 2.2

6/14/2020 6.1 3.3 7/14/2020 5.3 94.0 2.5 8/14/2020 3.7 101.0 2.2

6/15/2020 4.5 2.8 7/15/2020 4.0 95.0 2.5 8/15/2020 4.0 102.0 2.3

6/16/2020 4.5 3.1 7/16/2020 4.6 93.0 2.6 8/16/2020 3.8 105.0 2.3

6/17/2020 5.3 3.0 7/17/2020 4.5 96.0 2.4 8/17/2020 4.4 100.0 2.3

6/18/2020 4.3 3.2 7/18/2020 4.0 95.0 2.5 8/18/2020 3.8 99.0 2.4

6/19/2020 5.2 2.8 7/19/2020 4.4 97.0 2.5 8/19/2020 3.7 102.0 2.3

6/20/2020 5.8 94.0 3.0 7/20/2020 4.4 2.6 8/20/2020 3.4 98.0 2.3

6/21/2020 4.7 94.0 2.7 7/21/2020 4.4 2.4 8/21/2020 3.3 2.5

6/22/2020 5.1 95.0 2.7 7/22/2020 4.2 95.0 2.4 8/22/2020 3.5 95.0 2.3

6/23/2020 5.0 98.0 2.8 7/23/2020 4.2 2.6 8/23/2020 3.7 2.5

6/24/2020 5.5 96.0 2.7 7/24/2020 5.1 2.7 8/24/2020 3.8 96.0 2.5

6/25/2020 4.7 2.8 7/25/2020 5.4 2.9 8/25/2020 3.7 94.0 2.7

6/26/2020 5.1 94.0 2.6 7/26/2020 4.9 2.7 8/26/2020 3.9 98.0 2.5

6/27/2020 4.8 3.0 7/27/2020 5.2 94.0 2.4 8/27/2020 4.0 97.0 2.1

6/28/2020 5.3 95.0 3.3 7/28/2020 4.7 99.0 2.4 8/28/2020 3.8 64.0 2.0

6/29/2020 5.4 2.6 7/29/2020 4.5 72.0 2.2 8/29/2020 4.4 2.1

6/30/2020 4.6 98.0 2.9 7/30/2020 4.5 73.0 2.2 8/30/2020 3.8 2.4

7/31/2020 4.3 102.0 2.5 8/31/2020 3.9 2.5

August 4.4 2.07.6 2.4 July 5.9 2.2

Boiler Plant Summer Hourly Maximum/Minimum 2020

Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

June

Table 5

1/1/2019 1.0 13.1 2/1/2019 11.3 3/1/2019 9.0 12/1/2019 10.8

1/2/2019 1.0 13.0 2/2/2019 10.2 3/2/2019 9.1 12/2/2019 10.8

1/3/2019 8.0 13.2 2/3/2019 9.9 3/3/2019 9.5 12/3/2019 11.0

1/4/2019 12.9 2/4/2019 10.8 3/4/2019 9.8 12/4/2019 9.5

1/5/2019 11.1 2/5/2019 10.8 3/5/2019 10.8 12/5/2019 9.9

1/6/2019 10.7 2/6/2019 11.4 3/6/2019 8.9 12/6/2019 10.0

1/7/2019 11.3 2/7/2019 16.0 12.1 3/7/2019 9.5 12/7/2019 9.6

1/8/2019 11.5 2/8/2019 16.0 13.0 3/8/2019 9.7 12/8/2019 8.7

1/9/2019 11.3 2/9/2019 24.0 11.5 3/9/2019 11.2 12/9/2019 9.8

1/10/2019 10.6 2/10/2019 17.0 11.8 3/10/2019 10.4 12/10/2019 10.2

1/11/2019 11.1 2/11/2019 17.0 11.5 3/11/2019 10.1 12/11/2019 10.4

1/12/2019 11.4 2/12/2019 17.0 11.6 3/12/2019 9.5 12/12/2019 10.8

1/13/2019 10.4 2/13/2019 11.1 3/13/2019 10.9 12/13/2019 10.0

1/14/2019 11.2 2/14/2019 10.3 3/14/2019 23.0 11.4 12/14/2019 9.3

1/15/2019 10.2 2/15/2019 10.9 3/15/2019 11.3 12/15/2019 10.4

1/16/2019 9.5 2/16/2019 10.7 3/16/2019 10.8 12/16/2019 10.7

1/17/2019 10.6 2/17/2019 11.4 3/17/2019 10.1 12/17/2019 15.0 11.8

1/18/2019 9.9 2/18/2019 11.7 3/18/2019 10.1 12/18/2019 18.0 11.7

1/19/2019 11.0 2/19/2019 12.0 3/19/2019 9.4 12/19/2019 11.7

1/20/2019 10.8 2/20/2019 17.0 12.1 3/20/2019 9.1 12/20/2019 18.0 11.3

1/21/2019 10.6 2/21/2019 11.4 3/21/2019 10.3 12/21/2019 10.7

1/22/2019 10.9 2/22/2019 11.9 3/22/2019 10.6 12/22/2019 10.8

1/23/2019 19.0 11.2 2/23/2019 11.7 3/23/2019 9.9 12/23/2019 9.7

1/24/2019 11.3 2/24/2019 11.2 3/24/2019 10.1 12/24/2019 10.4

1/25/2019 11.9 2/25/2019 12.4 3/25/2019 10.5 12/25/2019 10.0

1/26/2019 11.4 2/26/2019 12.4 3/26/2019 9.3 12/26/2019 11.5

1/27/2019 11.8 2/27/2019 10.1 3/27/2019 8.3 12/27/2019 10.5

1/28/2019 10.8 2/28/2019 10.3 3/28/2019 9.8 12/28/2019 11.7

1/29/2019 10.1 3/29/2019 9.5 12/29/2019 16.0 12.0

1/30/2019 9.4 3/30/2019 10.0 12/30/2019 11.2

1/31/2019 10.3 3/31/2019 10.1 12/31/2019 25.0 12.2

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Outdoor

99.6%

(17.7F)

Boiler Plant Hourly Maximum 2019

Date

Maximum

Hourly

Steam

Mlbs

Janurary Feburary

Date

Maximum

Hourly

Steam

MlbsDate

Maximum

Hourly

Steam

Mlbs

13.0 March 11.413.2

Date

Maximum

Hourly

Steam

Mlbs

Outdoor

99.6%

(17.7F)

December 12.2

Table 6

6/1/2019 6.9 81.0 4.5 7/1/2019 4.5 2.1 8/1/2019 4.5 1.9

6/2/2019 6.5 4.7 7/2/2019 4.9 2.3 8/2/2019 4.6 1.8

6/3/2019 6.0 3.1 7/3/2019 4.5 2.4 8/3/2019 4.6 2.0

6/4/2019 5.4 2.8 7/4/2019 4.4 2.7 8/4/2019 4.4 94.0 2.4

6/5/2019 4.0 2.1 7/5/2019 4.5 2.1 8/5/2019 5.1 98.0 3.0

6/6/2019 4.3 2.4 7/6/2019 4.1 2.4 8/6/2019 5.2 90.0 3.1

6/7/2019 4.1 2.1 7/7/2019 4.7 2.1 8/7/2019 4.6 2.4

6/8/2019 3.2 47.0 1.8 7/8/2019 4.4 2.6 8/8/2019 3.7 2.3

6/9/2019 3.6 46.0 1.8 7/9/2019 4.9 2.8 8/9/2019 3.9 2.2

6/10/2019 4.2 51.0 1.8 7/10/2019 4.4 2.4 8/10/2019 4.1 2.6

6/11/2019 4.3 54.0 1.8 7/11/2019 4.6 2.6 8/11/2019 4.1 2.3

6/12/2019 4.8 2.0 7/12/2019 4.3 2.5 8/12/2019 3.9 2.3

6/13/2019 5.5 2.0 7/13/2019 4.3 2.3 8/13/2019 4.0 93.0 2.1

6/14/2019 5.7 2.8 7/14/2019 4.3 2.8 8/14/2019 4.6 97.0 1.9

6/15/2019 4.4 2.8 7/15/2019 5.0 96.0 1.7 8/15/2019 3.9 60.0 1.4

6/16/2019 5.0 2.8 7/16/2019 3.6 2.3 8/16/2019 4.2 94.0 2.3

6/17/2019 4.7 2.5 7/17/2019 4.3 2.3 8/17/2019 3.8 2.1

6/18/2019 5.0 2.0 7/18/2019 4.0 2.2 8/18/2019 3.9 1.9

6/19/2019 3.9 1.9 7/19/2019 4.4 2.0 8/19/2019 3.9 2.0

6/20/2019 3.6 2.1 7/20/2019 4.9 1.9 8/20/2019 4.7 97.0 2.0

6/21/2019 3.7 2.0 7/21/2019 3.7 2.0 8/21/2019 4.1 98.0 2.0

6/22/2019 3.5 1.9 7/22/2019 4.5 2.2 8/22/2019 3.9 94.0 2.0

6/23/2019 3.2 2.0 7/23/2019 4.6 2.6 8/23/2019 3.7 2.6

6/24/2019 4.4 1.9 7/24/2019 4.6 2.2 8/24/2019 4.4 2.2

6/25/2019 4.0 1.9 7/25/2019 4.2 2.0 8/25/2019 3.7 2.1

6/26/2019 4.7 2.3 7/26/2019 3.7 2.0 8/26/2019 4.1 96.0 2.4

6/27/2019 4.9 2.6 7/27/2019 3.5 1.8 8/27/2019 3.4 97.0 2.0

6/28/2019 5.0 2.5 7/28/2019 4.0 2.1 8/28/2019 4.3 95.0 2.1

6/29/2019 4.5 2.2 7/29/2019 4.0 2.1 8/29/2019 3.7 94.0 2.1

6/30/2019 4.3 2.3 7/30/2019 4.8 2.0 8/30/2019 4.2 97.0 2.4

7/31/2019 3.8 2.1 8/31/2019 4.0 98.0 2.5

1.7 August 5.2 1.4June 6.9 1.8 July 5.0

Boiler Plant Summer Hourly Maximum/Minimum 2019

Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

Mlbs Date

Maximum

Hourly

Steam

Mlbs

Outdoor

0.4%

(94.4F)

Minimum

Hourly

Steam

VI. Calculations

From the data summary in Section V above, the Prescott VA winter steam load is 12,700 lbs/hr at the required 99.6% winter design temperature of 17.7F. With a 10% growth factor N=12,700*1.10=13,970 lbs/hr, approximately 400 BHP. The three existing equally sized boilers provide an oversized N=24,000 lbs/hr. The summer steam load is 5,800 lbs/hr. With a 10% growth factor N=5,800*1.10=6,380 lbs/hr, approximately 200 BHP. . In conclusion the existing boiler system is oversized, and the boilers are beyond their life expectancy.

The recommended replacement is and will be three 300 BHP boilers to meet the N+1requirements year-round. Piping system stress analysis was performed on the steam and condensate return systems. Both systems were found to be within allowable stresses and the hanger loads calculated indicate minimal loading. The final contractor submitted hangers shall be in compliance with these calculations and industry standards.

See Attachment A: Structural Calculations See Attachment B: Condensate Return Stress Analysis See Attachment C: Steam Piping Stress Analysis

End of Design Option Narrative & Calculations

STRUCTURAL CALCULATIONS

Northern VA Health Care System 500 N. State HWY 89 Prescott AZ, 86313

Construction Documents

Engineer of Record

Cliff Cole

Prepared by:

Timothy P. Thurgood

23116

SLC1 Dunnage Generator Support Frame

Project #:

Wednesday, November 1, 2023

EA Solutions

324 S State Street

SLC, UTPrescott AZ, 86313

Project Name:

City/State:

Replace Steam Boilers Client Name:

Street Number:

City/State

Northern VA Health Care System

500 N. State HWY 89 Street Number:

WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

11/07/2023 Page 1 of 82

JUNE 6, 2025

Attachment A

WCA Structural Engineering 442 North Main Street Bountiful UT, 84010

1. PG#

2. PG#

3. PG#

4. PG#

Foundation Elements/Boiler

Design Criteria and Scope

Loading

Stairs

Calculation Index

WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

11/07/2023 Page 2 of 82

1.

Project Information

County

Dead

Boiler 37,000 # Superior Boiler

Dead 20 psf

Live

Live Load 40 psf

Snow

Roof Snow 26 psf

Ground Snow 34 psf

Seismic

SDS 0.344

Wind

Wind Speed 111 mph Ultimate

Wind Pressure 55 psf

= 30 in

= D

= 1500 psf

IBC 2018

Address/City/State/Zip

Area/Subdivision NA

Salt Lake

NA

Min Frost

Site Class

Soil Bearing Pressure

Geotechnical design basis

Description

Dead Load on Platform

Description

Description

Live Load on Platform

Live load on Platform

Ground Snow

Description

Design Short Sprectral Resonse

Gravity Load Parameters

VA Medical

IV

Design Criteria and Scope

Jurisdiction/ Occupancy

Deferred Submittals

Jurisdiction

Building Code

Soil

Use and Occupancy classification

Risk Category

Northern VA Health Care System 500 N. State HWY 89 Prescott AZ, 86313

11/07/2023 Page 3 of 82

Scope

Design/Verify the existing boiler foundation elements to support new boilers. Remove the exsiting north foundation wall and window for install of new boilers. Replace foundation wall and window after install of boiler.

Remove and replace existing mezzanine for install of boilers. Design new steel stair for second entrance. Design new header and window opening to stairs.

11/07/2023 Page 4 of 82

2. Loading

11/07/2023 Page 5 of 82

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The ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.

Hazards by Location

Search Information

Coordinates: 34.55389376354381, -112.45270965332031

Elevation: 5329 ft

Timestamp: 2023-08-15T18:58:08.313Z

Hazard Type: Wind

ASCE 7-16

MRI 10-Year 71 mph

MRI 25-Year 77 mph

MRI 50-Year 82 mph

MRI 100-Year 87 mph

Risk Category I 95 mph

Risk Category II 101 mph

Risk Category III 107 mph

Risk Category IV 111 mph

ASCE 7-10

MRI 10-Year 76 mph

MRI 25-Year 84 mph

MRI 50-Year 90 mph

MRI 100-Year 96 mph

Risk Category I 105 mph

Risk Category II 115 mph

Risk Category III-IV 120 mph

ASCE 7-05

ASCE 7-05 Wind Speed 90 mph

The results indicated here DO NOT reflect any state or local amendments to the values or any delineation lines made during the building code adoption process. Users should confirm any output obtained from this tool with the local Authority Having Jurisdiction before proceeding with design.

Please note that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.

Disclaimer Hazard loads are interpolated from data provided in ASCE 7 and rounded up to the nearest whole integer. Per ASCE 7, islands and coastal areas outside the last contour should use the last wind speed contour of the coastal area – in some cases, this website will extrapolate past the last wind speed contour and therefore, provide a wind speed that is slightly higher. NOTE:

For queries near wind-borne debris region boundaries, the resulting determination is sensitive to rounding which may affect whether or not it is considered to be within a wind-borne debris region.

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WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

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Search Information

Address: prescott AZ VA Hospital

Coordinates: 34.5538766, -112.45247

Elevation: 5328 ft

Timestamp: 2023-07-17T16:56:50.994Z

Hazard Type: Seismic

Reference Document: ASCE7-16

Risk Category: IV

Site Class: D-default

MCER Horizontal Response Spectrum Design Horizontal Response Spectrum

Basic Parameters

Name Value Description

SS 0.337 MCER ground motion (period=0.2s)

S1 0.102 MCER ground motion (period=1.0s)

SMS 0.515 Site-modified spectral acceleration value

SM1 0.245 Site-modified spectral acceleration value

SDS 0.344 Numeric seismic design value at 0.2s SA

SD1 0.164 Numeric seismic design value at 1.0s SA

Additional Information

Name Value Description

SDC D Seismic design category

Fa 1.531 Site amplification factor at 0.2s

Fv 2.395 Site amplification factor at 1.0s

CRS 0.906 Coefficient of risk (0.2s)

CR1 0.918 Coefficient of risk (1.0s)

PGA 0.151 MCEG peak ground acceleration

FPGA 1.499 Site amplification factor at PGA

PGAM 0.226 Site modified peak ground acceleration

TL 6 Long-period transition period (s)

SsRT 0.337 Probabilistic risk-targeted ground motion (0.2s)

SsUH 0.372 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years)

SsD 1.5 Factored deterministic acceleration value (0.2s)

S1RT 0.102 Probabilistic risk-targeted ground motion (1.0s)

S1UH 0.112 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years)

5328 ft

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0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Period (s) 0.00

0.10

0.20

0.30

0.40

0.50

Sa(g)

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Period (s) 0.00 0.05 0.10 0.15 0.20 0.25 0.30

Sa(g)

WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

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S1D 0.6 Factored deterministic acceleration value (1.0s)

PGAd 0.5 Factored deterministic acceleration value (PGA)

The results indicated here DO NOT reflect any state or local amendments to the values or any delineation lines made during the building code adoption process. Users should confirm any output obtained from this tool with the local Authority Having Jurisdiction before proceeding with design.

Please note that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.

Disclaimer Hazard loads are provided by the U.S. Geological Survey Seismic Design Web Services.

While the information presented on this website is believed to be correct, ATC and its sponsors and contributors assume no responsibility or liability for its accuracy. The material presented in the report should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and applicability by engineers or other licensed professionals. ATC does not intend that the use of this information replace the sound judgment of such competent professionals, having experience and knowledge in the field of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the report provided by this website. Users of the information from this website assume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for the building site described by latitude/longitude location in the report.

WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

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11/07/2023 Page 9 of 82

3. Foundation Elements/Boiler

11/07/2023 Page 10 of 82

714 Corey Road, Hutchinson, KS 67501 (620) 662-6693 sales@superiorboiler.com SuperiorBoiler.com

J&B Sales, Project Proposal: VA Prescott Proposal Number: 4100679 R1 Date: October 14, 2022

Ds & O TYPE

SHAWNEE

11/07/2023 Page 11 of 82 www.superiorboiler.com 714 Corey Road, Hutchinson, KS 67501

1. Specifications A. Design Boiler gross capacity at MCR 10,500 lb/hr Blowdown Rate at MCR 210 lb/hr Boiler Net Capacity at MCR 10,500 lb/hr Fuel NG Maximum heat input 12.7 MM btu/hr Maximum allowable working pressure 160 psig Boiler operating pressure at steam drum 70 psig Saturated steam temperature at steam drum 316 oF Feed water temperature (DA to economizer) 227 oF Ambient air temperature 70 oF Relative humidity 60 % Elevation (FASL) <1000 ft Design blow-down rate 2 % Installation type Indoor Electrical supply power available 460V/3Ph/60Hz Control supply power available 120V Project location specific

B. Boiler Specifications Boiler type Ds O Flue gas discharge location Top Top Boiler overall height 10’- 0” 10’- 0” ft-in Boiler overall width 8’- 4” 8’- 2” ft-in Boiler length over casing (less burner) 10’- 4” 10’- 6” ft-in Boiler length including burner (assumed) 15’- 4” 15’- 6” ft-in Estimated shipping weight 28,000 28,000 lbs Estimated weight at operation 37,000 37,000 lbs Steam outlet line size at saturated steam drum 6” 6” in Boiler feed water inlet line size 1.50” 1.50” in Steam drum diameter (I.D.) and thickness 24” x 0.75” 24” x 0.75” in Steam drum material of construction SA-516-Gr.70 SA-516-Gr.70 Lower drum diameter (I.D.) and thickness 24” x 0.75” 24” x 0.75” in Lower drum material of construction SA-516-Gr.70 SA-516-Gr.70 Convection bank tube diameter and thickness 2.0 x 0.105 2.0 x 0.105 in Membrane tube diameter and thickness 2.0 x 0.120 2.0 x 0.120 in Boiler tube material SA-178-Gr.A SA-178-Gr.A Furnace width 5’- 7” 5’- 0” ft-in Furnace height 4’- 10” 4’- 0” ft-in Furnace length 7’- 7” 7’- 8” ft-in Furnace volume 211 169 ft3

WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment

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Boiler bank convection heating surface area 942 1293 ft2 Furnace flat…