Reference Only - Basis of Design BOD Part 3 of 7.pdf

Structural, Civil and Blast Basis of Design

A. Structural

• Building Codes and References

• Project Description

• Existing Structures

• Site Design Criteria

B. Civil

C. Blast: See Separate Document

BASIS OF DESIGN: STRUCTURAL, CIVIL & BLAST

Fargo VA Health Care System | EHRM Infrastructure Upgrades | March 18, 2022

3A STRUCTURAL BASIS OF DESIGN

BUILDING CODES AND DESIGN REFERENCES

The project will be designed and constructed in accordance with VA program guides, directives, design manuals, and specifications in conjunction with industry standard criteria.

Building Codes and Design References U.S. Department of Veterans Affairs, Master Specifications PG-18-1 U.S. Department of Veterans Affairs, VHA Program Guide PG-18-3, September 2013 U.S. Department of Veterans Affairs, National CAD Standards and Details PG-18-4 U.S. Department of Veterans Affairs, Construction Standards H-18-3 U.S. Department of Veterans Affairs, VA Directive 7512, 3 August 2017 U.S. Department of Veterans Affairs, Design Manuals PG-18-10 U.S. Department of Veterans Affairs, Design Submission Requirements PG-18-15C 2018 IBC, International Building Code ACI 318-19, Building Code Requirements for Reinforced Concrete ACI 360R-10, Specifications Guide to Design of Slabs-On-Ground ASCE 7-16 Minimum Design Loads for Building and Other Structures AISC 360-16, American Institute of Steel Construction Inc AISC 325-17, Steel Construction Manual, 15th Edition AWS D1.1, Structural Welding Code – Steel TMS 402/602-16, Building Code Requirements and Specifications for Masonry

Structures

PROJECT DESCRIPTION

The purpose of the project is to upgrade the electric distribution, telecommunications distribution, and HVAC system to allow for the new Electronic Health Record

Modernization (EHRM) project. This project will include the renovation of multiple spaces within the Fargo VAHCS Campus.

The structural scope includes the review of floor loading and existing primary structural frame to determine if adequate capacity exists for the new occupancies and equipment.

EXISTING STRUCTURES

BUILDING 1

Building 1 is 3-story building with a full basement and a full attic, constructed in

1928. The primary structure is constructed using a reinforced concrete pan joist system. Loads are transferred to regularly spaced concrete columns. The foundation is primarily constructed using spread footings and grade beams.

The gabled roof is constructed using a reinforced concrete pan joist system.

This roof slab is supported in the center by a concrete frame that transfers roof loads to the columns below.

The provided as-built drawing set for building 1 is incomplete and assumptions on design loads have been made. The VA should review their records to see if the missing information exists in another location.

Using UBC 1927 design live loading, Calibre has assumed the minimum original live loading for this building is 40 PSF. Following direction from the VA, the telecommunication design has removed the UPS from each individual server rack which significantly reduces the anticipated equipment live load. This reduced live load is less that the assumed original design live load and will not require structural reinforcement.

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STRUCTURAL BASIS OF DESIGN

EXISTING STRUCTURES (CONT’D)

BUILDING 9

Building 9 is 4-stories with a full basement and an attic, constructed in 1945. The primary structure is constructed using reinforced concrete pan joist system.

Loads are transferred to regularly spaced concrete columns. The foundation is primarily constructed using spread footings and grade beams. The gabled roof is constructed using 2x10 rafters at 14” on center. These rafters are supported in the center by a steel frame transfers roof loads to the columns below.

The existing building drawings for building 9 were damaged on the sheet (9-24) that showed building design loads. The VA should review their records to see if the missing information exists in another location.

Using UBC 1943 design live loading, Calibre has assumed the minimum original live loading for this building is 40 PSF. Following direction from the VA, the telecommunication design has removed the UPS from each individual server rack which significantly reduces the anticipated equipment live load. This reduced live load is less that the assumed original design live load and will not require structural reinforcement.

BUILDING 46

Building 46 is a 5-story addition, constructed in 1983, that connects buildings 1 and 9. Each floor is constructed using a composite steel deck with lightweight structural concrete topping, on steel beams. Loads are transferred to regularly spaced steel columns. The foundation is primarily constructed using reinforced concrete spread footings and grade beams. Portions of the roof are also constructed using composite metal deck on steel beams while other sections only have bare metal deck on top of steel beams.

Building 46 has been expanded multiple times since originally constructed.

As a part of this project, the design team is proposing a new TR located the expanded mechanical penthouse. Per the existing drawing set, this floor slab in this area has adequate capacity for the reduced equipment live load and will not require structural reinforcement.

BUILDING 51

Building 51 is an existing office building that will be getting a small 20’x12’ addition to hold the new TR room. The new addition will be a standalone addition separated by an expansion joint from the existing building.

The new addition will be constructed of solid grouted CMU walls (for blast concerns) with steel roof beams and concrete on metal roof deck with over-framing trusses forming a gable roof. The concrete is also added for blast concerns. A 4” concrete slab on grade will be the floor. The foundations will be concrete stem wall and footings bearing on approved subgrade. There is not a project specific geotechnical report so a geotechnical engineer will need to be hired by the owner during the construction phase to confirm bearing capacities match or exceed the assumptions.

OTHER BUILDINGS

The proposed infrastructure upgrades at the other buildings on campus not referenced in this document are not anticipated to affect the existing primary structure. Structural reinforcement or enhancement is not anticipated.

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3A

STRUCTURAL BASIS OF DESIGN

SITE DESIGN CRITERIA

DEAD LOADS

• Roofing & Insulation: 5 PSF

• Deck (Building 51 addition): 60 PSF

• Ceiling/Fireproofing: 5 PSF

• Miscellaneous: 5 PSF

• Structural Beams/Columns: Actual weight

LIVE LOADS

• New TR Equipment: 250 lbs/rack

• New TR Live Load: 40 PSF

SEISMIC DESIGN DATA

a. Building Risk Category = IV

b. Importance Factor = 1.5

c. Soil Site Class = D (assumed)

d. SS = 0.059g, S1 = 0.019g, SDS = 0.062g, SD1 = 0.03g

e. Seismic Design Category = A

f. Building Frame System: Varies

WIND DESIGN DATA

a. Basic Wind Speed = 125 MPH (ASCE 7)

b. Roughness Category = B

c. Exposure Category = B

d. Importance Factor = 1

SNOW DESIGN DATA

a. Ground Snow Load = 50 PSF

b. Importance Factor = 1.2

c. Exposure Factor Ce = 0.9

d. Thermal Factor Typical Ct = 1

e. Flat roof snow = 50 PSF

f. Building 51 drift and gable roof snow loads shown on structural drawings

CLIMATE DATA

a. Frost Depth = 5’-0”

b. Rainfall Intensity = 3.25” per hour

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3A

CIVIL BASIS OF DESIGN

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3B

BUILDING CODES AND DESIGN REFERENCES

The project will be designed and constructed in accordance with VA program guides, directives, design manuals, and specifications in conjunction with industry standard criteria.

U.S. Department of Veterans Affairs, Master Specifications PG-18-1

U.S. Department of Veterans Affairs, VHA Program Guide PG-18-3, September 2013

U.S. Department of Veterans Affairs, National CAD Standards and Details PG-18-4

U.S. Department of Veterans Affairs, Construction Standards H-18-3

U.S. Department of Veterans Affairs, VA Directive 7512, 3 August 2017

U.S. Department of Veterans Affairs, Design Manuals PG-18-10

U.S. Department of Veterans Affairs, Design Submission Requirements PG-18-15C

2018 IBC, International Building Code

ACI 318-19, Building Code Requirements for Reinforced Concrete

ACI 360R-10, Specifications Guide to Design of Slabs-On-Ground

ASCE 7-16 Minimum Design Loads for Building and Other Structures

AISC 360-16, American Institute of Steel Construction Inc

AISC 325-17, Steel Construction Manual, 15th Edition

AWS D1.1, Structural Welding Code – Steel

TMS 402/602-16, Building Code Requirements and Specifications for Masonry Structures

PROJECT DESCRIPTION

The purpose of the project is to upgrade the electric distribution, telecommunications distribution and fiber optic systems for the improvements to the new Electronic Health Record Modernization (EHRM) project. This project will include the renovation of multiple spaces within the Fargo VAMC Campus, an expansion to building 51 and additional routing of new infrastructure to better connect the campus internally as well as new and additional connection to existing infrastructure outside of the campus.

The civil scope will include the evaluation of the existing telecommunication and fiber optic routing through the campus via existing utility tunnels, conduits and duct banks and the design of new duct banks to provide improved and secondary services. In addition to the external evaluation and design, a new expansion is being proposed to Building 51. The civil scope will include revised grading and utility connections as needed.

Additional information that will be included with the plans will be construction details and specifications as well as construction staging and activity details.

MECHANICAL & PLUMBING

BASIS OF DESIGN

• Design Criteria

• Weather Design Conditions

• Calculations

• Mechanical—HVAC

• Demolition—HVAC & Plumbing

• New Work—HVAC & Plumbing

BASIS OF DESIGN: MECHANICAL & PLUMBING

DESIGN CRITERIA

The design of the HVAC systems shall be in accordance with the following codes and standards:

• VA Directives, Space Planning Criteria, Design Manuals, Master Specifications, VA

National CAD Standard Application Guide, and other Guidance on the Technical

Information Library (TIL). (http://www.cfm.va.gov/til/)

• International Building Code 2021

• International Mechanical Code 2021

• NFPA 101 Life Safety Code 2021

• ASHRAE Standard 170. Ventilation of Health Care Facilities—2017

• ASHRAE Standard 90.1—2019

• ASHRAE Standard 62.1—2019

• Applicable National Fire Protection Association (NFPA) codes

• Sheet Metal and Air Conditioning Contractors Association (SMACNA)

• Underwriter’s Laboratories (UL)

• VA HVAC Design Manual—March 1, 2020

WEATHER DESIGN CONDITIONS

Outdoor design weather conditions are based on engineering weather data from VA HVAC

Design Manual for Fargo. Winter design condition is the 99.6% occurrence design value.

Summer design condition is the 0.4% occurrence design value.

• Outdoor Design Conditions:

Winter: -19.3° F ( -30 F per station directive)

Summer: 90.7° F (DB), 72° F (WB)

• Indoor design conditions: Computer/Data Rooms - Data Sheet VA HVAC Design

Manual

Heating: 64° F

Cooling: 81° F (72° F Per station direction as sensed at Thermostat)

Ventilation rates shall be in accordance with the VA HVAC Design Manual 2020 or 2018

IMC.

CALCULATIONS

Building cooling loads are calculated using commercial load calculation computer program (HAP version 5.11) capable of modeling systems over complete 8760-hour annual period, using ASHRAE load calculation techniques. EHRM guidelines Infrastructure

Standard for Telecommunication Spaces (ISTS) Version 3.1 apply. Revised guideline recommendations from the Data Center and Infrastructure Engineering (DCIE) for data rack heat gain loads has been implemented as follows:

1 rack=5kW, 2 racks =7.0 kW, 3-racks =8.5 kW, 4 racks =10 kW

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MECHANICAL & PLUMBING BASIS OF DESIGN 4

MECHANICAL— HVAC

The Mechanical and Plumbing scope of work consists of providing dedicated room cooling to maintain required temperatures in each EHRM telecommunications room space to remove rejected heat from multiple IT data racks. Cooling loads for design are based on each rack maximum load of sensible heat rejection: 1 rack=17.1 MBH, 2 racks =23.8

MBH, 3-racks =29.0 MBH, 4 racks =34.1 MBH, 5 racks=42.6 MBH.

DEMOLITON- HVAC AND PLUMBING

• Existing supply and return grilles from existing supply cooling, return and exhausts systems extended from outside of room are to remain as back up for new dedicated

AC systems for each space. Exhaust fans, VAV boxes, reheat coils, related piping and controls shall remain also for back up operation.

• Existing VAV boxes ductwork, grilles and thermostats located in rooms are to remain as back up for new dedicated AC systems for each space.

• Where existing ceilings are to be removed , flexible duct and existing diffusers, registers, and hard ductwork shall be suspended from structure above.

• Sheet Metal and Air Conditioning Contractors Association (SMACNA)

• Relocated existing IT closets shall remain as is with no demolition or new work in the

HVAC or plumbing scope of work.

NEW WORK -MECHANICAL / PLUMBING

• New and renovated existing Telecommunication Rooms shall have new dedicated duct free split system cooling only DX air conditioning. This will have a wall mounted fan coil with DX evaporator coil and an outdoor wall or roof mounted air cooled condensing unit.

• Refrigerant piping and control wiring shall connect to indoor and outdoor DX split system components.

• Applied systems shall be variable refrigerant flow (VRF) to match current and future loads. Spaces requiring 3 data racks or more will have 2 systems in each space as per

EHRM guidelines and DCIE maximum load directions.

• Split systems shall be manufactured by a air conditioning manufacture with cataloged optional low ambient features to operate and maintain cooling at –40F winter ambient operation. These shall be variable refrigerant flow (VRF) systems to match existing and maximum future loads from data equipment heat of rejection.

• Air conditioning equipment shall have factory installed and include temperature controls

BAS interface devices to be viewed and monitored in the MCR for operational status and to send front end signals for all unit component failures and alarm conditions.

Indoor units shall have full function programmable thermostats with unit status screen.

A temperature and humidity sensor shall be installed at each room location by TC contractor for BAS room temperature and humidity monitoring and adjustable high temperature alarm. Separate rack temperature and humidity to also be viewed and monitored by the BAS in the MCR via separate sensors with locations as directed by data contractor.

• Units shall have wall mounted condensate pumps below indoor sections and an insulated copper condensate drain line to nearest sanitary drain line.

• Drain lines from the evaporator coils and condensate pumps with condensate drain line from unit extended to the indirect waste connections. Mop sinks, floor drains, hubs at sanitary lines. Where required through the wall condensate drain lines shall be 30” above grade with splash blocks below with heat tracing 4’ before termination.

• Per discussions with VA personnel, humidification (small electrode or mist humidifiers) are not to be implemented for IT closet Telecommunication Room applications and will not be in this scope of new work.

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MECHANICAL & PLUMBING BASIS OF DESIGN 4

BASIS OF DESIGN: ELECTRICAL

ELECTRICAL BASIS OF DESIGN

• Design Criteria

• Design Narrative

DESIGN CRITERIA

The design of the Electrical Systems shall be in accordance with the latest published edition of the following codes and standards:

• International Building Code 2021

• Veterans Affairs Electrical Design Manual 2015 (PG-18-10)

• Veterans Affairs Master Specifications (PG-18-1)

• Veterans Affairs Design Guides (PG-18-12)

• National Electrical Code (NEC) – NFPA-70

• National Fire Alarm Code – NFPA-72

• Standard for Healthcare Facilities – NFPA-99

• Standard for the Installation of Stationary Energy Storage Systems—NFPA 855

• Standard for the Installation of Lightning Protection Systems- NFPA 780

• Underwriter’s Laboratories (UL)

• National Electric Manufactures Association (NEMA)

• Institute of Electrical and Electronics Engineers (IEEE)

• American National Standards Institute (ANSI)

• ASTM International (Formerly American Society for Testing and Materials)

• Occupational Safety and Health Hazards (OSHA)

• American Institute of Steel Construction (AISC)

• Illuminating Engineering Society of North America (IESNA)

• ASHRAE Standard 90.1

• OEHRM Requirements Specification, June 5, 2019, Ver. 1

• OEHRM Site Infrastructure and End User Device (EUD) Requirements, April 15, 2021, Ver. 2.0

• OIT Infrastructure Standards for Communications Spaces, Ver. 3.1, July 1, 2021

• Generic Small Data Center for Main Computer Rooms (MCR”s) and Other Campus

Support Centers, March 25, 2020

DESIGN NARRATIVE

Communications equipment will be relocated from existing IT rooms to the new TR rooms.

Bioengineering type services; Nurse Call, Security, etc. will also be relocated to the new TR room. The new TR rooms will be provisioned for OIT and CERNER equipment. UPS and

Emergency receptacles are planned to be removed in the future after all equipment is removed from the abandoned IT rooms.

New TR rooms will be provisioned with dedicated UPS power from the large monolithic “A”

UPS System that serves the Campus Computer Room, and buildings 1, 9, 40 and 46.

Data Center racks will be designed for 5KVA and Telecommunication Room racks will be designed for 3.5KVA, but expected not to exceed 2.5KVA of ultimate load. Because UPS power will be provided from the monolithic UPS System, individual UPS’s are not required in buildings 1, 9, 40 and 46. To support the EHRM design requirements, a new monolithic

UPS system and new UPS distribution system will be designed. The new “A” UPS System will replace the existing UPS System located in the basement Room BC 50A. The initial “A”

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ELECTRICAL BASIS OF DESIGN 5

DESIGN NARRATIVE (CONT’D)

New UPS Power Distribution to TR Rooms in Bldgs 1, 9, 40, and 46.

The A UPS System design is a 208/120V, 400KVA UPS System. It will include the following design:

• The initial installation will be configured to feed both the old and new UPS equipment to allow for cutting over equipment from the old to the new UPS with minimum downtimes.

• A 400KVA UPS will be installed for the ultimate buildout. Two 200KVA UPS modules will be initially installed, to power existing and new equipment. One

UPS module will be configured to 90KVA to prevent tripping of the existing 400A incoming power. The 2nd 200KVA UPS module will be installed and connected, but kept de-energized. A two year warrantee will be purchased for the 2nd UPS, so that it is in warrantee when energized after standing idle.

• To prepare for cutting over UPS power from old UPS to new UPS, all new and old

UPS loads will be terminated to the output of the new UPS. This will involve short outages of existing IT equipment as it is moved to the new UPS.

• The configuration of new and old equipment on UPS will remain, until all old equipment is moved, at which time the old UPS panels and circuits can be removed.

• All output breakers on the new UPS will be metered and monitored to keep the load from exceeding the existing 400A feed from Em gen 9.

• DESCRIPTION OF TEMPORARY CONFIGURATION—Normal and Emergency

Power to the UPS will remain from existing Switchgear 9 and Em Gen 9., as this will temporarily support a 90KVA load on the UPS, including battery charging current, until a larger Em Gen is installed. Note that the 2021 UPS load is only

75KVA.

• The new UPS is composed of two 200KVA inverter modules, initially configured for about 23% of the ultimate load. The modules can be reconfigured when

UPS load increases.

• A cabinet with VRL batteries sized to provide 14 min UPS uptime, will be initially installed. The stored battery energy will only be 50KWH, so conformance to

NFPA 855 is not required.

• When the UPS is configured for more load, stored battery capacity will exceed

70KWH, and NFPA 855 requirements will need to be applied to the battery installation.

• Battery Monitoring System to manage batteries and determine maintenance intervals,

• Each UPS module will contain one Static Transfer Switche, and the UPS Bypass

Switch will be housed in its own cabinet,

• A UPS Distribution Panel “EBUPS DSW” will have metering on all output breakers that feed UPS loads, to monitor TR UPS loads, and prevent overload and tripping.

• Basement UPS distribution to the TR rooms, will be directly from the new EBUPS

DSW UPS breakers.

• Remaining UPS distribution will be from UPS Distribution panels in building 40, and floors 1, 2, 3, 4 and 5 in buildings 1, 9 and 46.

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DESIGN NARRATIVE (CONT’D)

• 1st Floor UPS distribution will be from two 150A UPS panels,

• 2nd Floor UPS distribution will mirror the 1st floor,

• 3rd Floor UPS distribution will be from one 150A panel,

• 4th Floor UPS distribution will be from one 150A panel,

• Penthouse UPS distribution will be from a 150A panel located Penthouse A.

• Each rack will be supplied from a 30A, 3 Phase branch circuit for UPS power.

Remote buildings will have a individual rack mounted UPS’s installed in each TR Room rack.

Each rack will be provisioned with one 120/208V 3-Phase PDU. When available, emergency power will be provided, otherwise normal power will power all TR room circuits.

• One light fixture in each TR room will be on Emergency Power if available. If

Emergency Power is not available, battery backup will be provided.

• One receptacle in each TR room will also be on Emergency Power if available. .

UPS Power Feeders and UPS Panels

• The UPS distribution will be a separate system of dedicated feeders and panels,

• Each UPS panel will be upsized with a 200% Neutral Bus to conduct the 3rd

Harmonic currents created by the IT equipment switching power supplies.

Power Distribution to TR Rooms in Outlying Buildings

• Smaller buildings and rooms with minimal telecommunications requirements will be provided with a enclosed wall mounted 24RU wall mounted cabinets. With internal

UPS.

One rack in a building with a “harsh” environment, without TR rooms, will be housed in

AFCO Defender Basis of Design, enclosed rack. One 30A circuit will be provide power to the internal UPS. Emergency power will feed the UPS if available. An additional

30A 3-phase circuit will power the Heat Removal unit in the AFCO Defender cabinet.

• One light fixture on Emergency Power or battery backup. Remaining lights on

Normal Power.

• One receptacle on Emergency Power if available, remaining receptacles on Normal

Power.

TR closets will be provided for locations with multiple racks. Each closet will be provisioned as follows:

• Rack mounted UPS, powered from Emergency Power if available,

• One light fixture on Emergency Power or battery backup. Remaining lights on

Normal Power.

• One receptacle on Emergency Power if available, remaining receptacles on Normal

Power.

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