S02 - Att 03 - CD Submission Design Report - Mental Health Add - Wilmington.pdf

Addition for Mental Health (In-fill

Auditorium)

Project No. 460-325

100% Construction Documents

Submission Design Report

Wilmington Veterans Affairs Medical Center

Wilmington, DE

October 28, 2022 uc

100% CD Submission Design Report: Addition for Mental Health (In-fill Auditorium)

TABLE OF CONTENTS

1. Project Overview ………………………………………………………………. 1

1.1 Executive Summary ……………………………………………………

1.2 Project Description ……………………………………………………

2. Architecture and Interior Design Approach …………………………………….. 5

2.1 Building 1 Auditorium and Mental Health Suite Renovation Concept…. 5

2.2 Building 1 Interior Design ……………………………………………… 6

2.3 Code Analysis ………………………………………………………... 7

3. Plumbing Design Approach ……………………………………………………

3.1 Existing Plumbing Systems ……………………………………………

3.2 Proposed Plumbing Systems ……………………………………………… 12

4. Mechanical HVAC Systems ………………………………………………………. 14

4.1 Existing Mechanical HVAC Systems ……………………………………… 14

4.2 Proposed Mechanical HVAC System ………………..…………… 14

5. Electrical Systems ……………………………………………………………….. 22

5.1 General ……………………………………………………………….. 22

5.2 Normal & Emergency Power Distribution ……………………………. 22

5.3 Branch Panelboards ………………………………………………………. 22

5.4 Lighting ……………………………………………………………….. 23

5.5 Proposed Electrical Systems & Distribution ……………………………. 23

6. Communication Systems ………………………………………………………. 25

6.1 Existing Communication Systems and distribution ……………………. 25

6.2 Proposed Communication Systems and Distribution ……………………. 25

7. Fire Protection …………………..……………………………………………. 26

7.1 Wet Pipe Sprinkler System ……………….……………………………… 26

7.2 Digital Addressable Fire Alarm System ……………………….………… 28

8. Structural Design Approach ……………...…………………………………………. 29

8.1 Overview of Project………………………………………………..…….……. 29

8.2 Structural Design Criteria …………………………………………….……. 30

8.3 Design Specifications …………..…..………………………………….……. 31

9. Infection Control Compliance …………………………………………….……...….. 31

10. Sustainable Design Approach ………………………………………….……….……. 35

10.1 Sustainable Design …………………..…………………….……….….……. 35

10.2 LEED Credits Under Design Development .……….……………….……. 35

11. Hazardous Material Survey …………………………………………………..……. 35

12. Cost Summary ……………………………………………………………….………… 35

APPENDICES

Appendix A – Design Review Checklists ……………………………………………….. 36

Appendix B – Equipment/Finishes Cut Sheet ………………………………………. 88

Appendix C – Hazardous Material Survey Report ..……………………………………… 211

100% CD Submission Design Report: Addition for Mental Health (In-fill Auditorium)

Appendix D – Structural Design Calculations ……....………………………………….…… 276

Appendix E – Column Reinforcement Calculations …...…….…………….………………… 602

Appendix F – HVAC Design Load Calculations …...………………….…………….……… 604

Appendix G – Cooling Load Calculations ….............……………………….………..……… 622

Appendix H – Heating Load Calculations …...…………...………………..………...……… 637

Appendix I – Chilled Water Load Calculations …...………………….……….………..…… 652

Appendix J – Steam Load Calculations …...……………..…………………………..…...… 654

Appendix K – DOAS Calculations ….…...………………………………….…...…...……… 656

Appendix L – Hydraulic Calculations …...………………………………….…...…...……… 671

100 % CD Submission Design Report: Addition for Mental Health (In-fill Auditorium)

1. Project Overview

1.1 Executive Summary

The Pettit Group, LLC (Pettit) has been contracted by the U.S. Department of Veterans Affairs

(VA), to perform the design work in Building 1 to in-fill the existing auditorium creating a new floor at the level of the existing first floor at the Wilmington VA Medical Center (VAMC), Wilmington, DE, Project No. 460-325. The new first floor space will be used to expand the mental health suite currently on the first floor, while the ground floor of the auditorium will be leveled off to create space for new VTS/Bene-travel, My Healthe Vet, ROI and Prosthetics Customer Service areas.

The Pettit Group will conduct this work under Contract Number 36C24420D0050.

The Pettit Group has contracted with a design team that includes the following companies:

The Pettit Group: Contract & Project Management; Quality Control; Architecture;

Interior Design Services

Perspectus: Architectural Support

GPD: Mechanical, Electrical, Plumbing Engineering

GHD: Fire Protection, Life Safety Engineering

Keast & Hood: Structural Engineering

TTI: Hazardous Material Investigation Services

Blundall

Assoc: Cost Estimating Services

This narrative and the cost estimate that will be prepared based of the design described from this point on will form the basis of the 100 % Design Submittal. The Cost Estimate will be prepared after this report is submitted to the VA and will be sent to the VA once complete 11 days after 100

% submission per the approved project schedule.

1.2 Project Description

This project is located within the Wilmington VA Medical Center, Wilmington, DE. The Pettit

Group’s scope initially includes only design work to support the renovation of the existing Building

1 auditorium, construction administration services will be provided under separate scope once awarded by the Wilmington VA. The existing auditorium will be demolished along with the existing mental health suite on the first floor to make way for new areas for the VTS/Bene-travel, My

Healthe Vet, ROI and Prosthetics Customer Service departments on the ground floor and a new expanded mental health suite on the first floor. Approximately 3,313 sq. ft. of the ground floor and

5,950 sq. ft. of the first floor of Building 1 will be renovated and integrated into the existing surroundings. All designs will be developed in accordance with VA guidelines and specifications outlined in the Scope of Work for Project #460-325.

Ground Floor

Currently the project area on the ground floor of Building 1 is a combination of the existing auditorium and support spaces such as electrical closets and housekeeping closets. The auditorium space will be fully demolished back to the main building structural walls freeing up previously unutilized square footage, while leaving the support spaces in their current locations integrating them into the new design. Currently the auditorium floor is sloped towards the stage and is partially below the finished floor level of the rest of the ground floor. This sloped portion will be in-filled matching the existing finished floor height of the emergency exit door and the remainder of the ground floor. The total new square footage provided for new VTS/Bene-travel, My Healthe Vet, ROI and Prosthetics Customer Service areas will be approximately 3100 sqft.

For the layout of the proposed space The Pettit Group is proposing to create an accessory corridor loop off the main corridor leading from the hospital entrance serving the parking garage. This loop will keep all new spaces easily accessible to the patients while limiting congestion in the main corridor and limiting noise disruption for the patients using the Face 2 Face stations and the training areas.

Ground Floor Hospital services will remain unchanged throughout construction with the exception of the existing Eligibility and Enrollment Service Function. As the new first floor level extends over top of this space the existing drop ceilings and duct work will need to removed and/or disconnected as they are supported from the second floor slab. Detailed plans to have this space disrupted for as little time as possible are outlined in The Pettit Groups preliminary phasing plan in this report. The Pettit Team will design and show all infection control / dust prevention measures required.

The Pettit Team will assess and design any asbestos abatement such as pipe lagging, floor tile and mastic. Lead paint discovered and noted in the Hazardous materials report is not of a significant quantity and was found only on features that are set to be demolished. Instructions for proper disposal will be prepared.

All new construction in this area is to be of non-load bearing metal stud and GWB. Face to Face service counter areas are to have a curtain wall system with pass thru windows integrated to allow optimal customer interaction. Per the request of the Wilmington VA staff all offices on an exterior wall will receive a new window which is to mimic the windows already in this area of the Medical

Center.

First Floor

Currently the project area on the first floor of Building 1 is occupied by the mental health suite that will be expanded upon completion of this project. Scope of work for this floor will consist of demolishing the existing mental health suite back to the main building structural walls leaving only the existing ductwork and piping currently traveling through our space that is not directly serving

it. The infill structural floor splitting the auditorium space will allow us to expand the services currently provided as part of the mental health suite. The new suite will include additional offices, MSA stations, group rooms and a rest room. Per the request of the Wilmington VA staff all offices on an exterior wall will receive a new window which is to mimic the windows already in this area of the Medical Center.

For the layout of the proposed space The Pettit Group is proposing creating two separate zones within the suite’s square footage, a secured zone with all of the private offices and a public zone which can be accessed off the main corridor but monitored by the MSA/Check-in area. The MSA area will be located across the corridor from its current location to maximize the area set aside for offices and give as much of a direct connection to the suites waiting room, which falls outside of our scope of work, as possible.

The Pettit Design Team will work closely with the VA Hospital staff to develop an efficient and functional space within VA guidelines. The Design Team will work with the VA Interior Designer during the schematic design phase of the project to develop an interior design plan for both floors, matching the design of the other remodeled areas of the hospital.

As part of an interim plan review 2 questions were raised:

- Question 1 was in regard to removing the dead end corridors at the west end of the hallways leading to the Mental health private offices.

o This discussed was again raised at the 25% review meeting it was agreed by all parties to relocate offices 218 and 219 to reduce the length of the dead end corridors and minimize the impact of the lowered ceiling heights underneath the existing beams.

- Question 2 was in regard to having a second staff rest room on the second floor.

o This request was fulfilled with the addition of a second restroom accessed from the main hallway adjacent the MSA area.

Phasing of this portion could take two potential directions. The first portion is to wall off the existing cavity on the first floor above the auditorium and build out the space leaving the existing mental health suite in service as long as possible. This would likely be the more expensive option but may be more convenient disrupting existing hospital services for as little time as possible. As discussed during the Site Analysis Review meeting it is the preference of the Wilmington VA staff to have construction completed in multiple phases in order to reduce impact to the current facilities operations and minimizing the need to utilize temporary relocations.

The other option would be to turn the existing mental health suite and auditorium spaces over to the GC at the same time, demolish and construct all new areas at the same time. This option will no longer be considered by The Pettit Group Team per direction given at the Site Analysis meeting.

Preliminary phasing for construction will be as follows:

Phase 1

a. Erect temporary construction/fire barriers separating the work areas from both the main ground floor corridors and first floor mental health suite which are to remain accessible during construction on both floors. Barriers needed in front of the Eligibility and Enrollment suite in Phase 2 to be constructed at the same time to minimize disturbances in the main corridor. All Barriers to be 1 hour rated as detailed on sheets G003 and G004.

b. Existing auditorium space to be demolished as detailed on sheets G003 and G004 in full on both floors.

c. Infill the sloped floor area of the Ground Floor and pour slab to provide a level work area.

Phase 2

a. Temporarily relocate the current Eligibility and Enrollment services function in room 167, to a location to be determined by the Wilmington VAMC.

b. Temporarily dismantle ceiling and ductwork serving this space to make way for the new first floor infill. These items are currently hung from the second floor slab and are in the way of installing this floor. Ductwork will be blocked off at the VAV boxes or fire dampers to not disrupt any other hospital services.

Phase 2a

a. Construct infill floor level where the expanded mental health suite will be located.

b. Reinforcement of all columns outside of the work area is to be completed and patched prior to the completion of Phase 2a.

Phase 2b

a. Reinstate ductwork and ceiling in the existing Eligibility and Enrollment services function in room 167. Area is then to be deep cleaned and re-opened.

(The Pettit Group is anticipating this area to need to be shut down for approximately 6-8 weeks. This is a preliminary estimate and can vary depending on the GC, availability of materials and ease of access or lack thereof inside the building)

b. Demolish portion of temporary fire barrier in front of the Eligibility and Enrollment Suite.

Phase 3

a. Begin construction on both floors within the original auditorium footprint only leaving the existing mental health suite operational.

b. Construct as much of the new first floor program as possible holding back finish work from the area adjacent to the construction barriers.

c. As detailed in the Mechanical Demolition drawings there is some existing ductwork to remain feeding other spaces on the Ground and First Floors that for head room conflicts need partially demolished and rerouted this will require temporarily shutting down heating and/or cooling to areas outside of our scope of work, these spaces are listed below. It will be planned for this work to be done over the course of one weekend to minimize impact of the operations of those areas.

Ground Floor Spaces

• 177A and B (Offices)

• 177C (Prosthetics)

• 182 (Medical Studio)

• 182A (Medical Media)

• 184 (Chapel)

• Portion of the corridor outside the Auditorium First Floor Spaces

• 1000, 1001, 1163 (Offices)

• 1002A (Vendor Area)

• 1147 (Secure Storage)

• Elevator Lobby

d. Fully complete all construction activities on the ground floor.

e. Demolish temporary Ground Floor and First Floor 1 hour rated construction barriers.

Phase 4

a. Relocate existing mental health suite, to the completed Ground Floor fit out space. This option was deemed the preferred of the 3 options presented in the Schematic Design Submission Design Report.

b. Erect new construction/fire barriers at the first floor, no other hospital functions will be affected as this area is at the end of a dead-end corridor.

c. Demolish existing mental health offices.

d. Construct the remainder of the first floor mental health suite.

e. Demolish all remaining construction barriers.

f. Relocate furniture from the temporary ground floor Mental Health suite to the completed First floor mental health suite.

g. Furnish the Ground floor and the remainder of the first floor.

2. Architectural and Interior Design Approach

2.1 Building 1 Auditorium and Mental Health Suite Renovation Concept

The renovated areas of this facility will be designed to provide the needed additional space for

VTS/Bene-travel, My Healthe Vet, ROI and Prosthetics Customer Service areas, on the ground floor and expand and improve the current mental health suite on the first floor.

All of the approximate 3,313 sq. ft. of the existing auditorium ground floor space will be utilized to provide the additional space for the services mentioned above. The auditorium space will be supplemented by new and existing spaces throughout the Wilmington VAMC These spaces are not in the SOW for project 460-235 and will not be addressed in any way by The Pettit Group

Team. On the first floor the Mental Health Suite will gain approximately 3,100 sq. ft. of previously unused void above the existing Auditorium ceiling. This will be combined with a reconfigured layout of the existing approximately 2,850 sq. ft. Mental Health service to provide the Wilmington

VAMC with a new 5,950 sq. ft. Mental Health Suite.

The interior of this space will be designed per all VA design guides and finishes selected per the

VA program guide. Finishes are to coordinate with existing renovated portions of building and potentially introduce additional design elements in the Mental Health Suite with the goal of creating a comfortable inviting space for the VA employees and the patients they are serving.

It should be noted that the existing conditions have been surveyed to the fullest extent possible by the Pettit Group and team. Not all areas behind the existing auditorium walls are able to be surveyed. There is believed to be existing piping (along the exterior walls, and in plumbing chases) and duct work serving areas outside of our scope of work that will need to remain but are in accessible for a full survey. The Pettit Team is coordinating those existing items per the drawings made accessible to them and will be requesting further documentation as the project progresses however will not be able to fully confirm all possible conflicts until a full demolition of the existing space is complete.

Programming

The program in general will include on the ground floor:

• 3 Face to Face stations (Prosthetics, ROI, Expansion station)

• For VTS/Bene-Travel, 5 offices and a shared training area

• For My Healthe Vet, 1 office, a shared training area and a storage closet

• 1 Storage closet for the Prosthetics department.

• 3 additional offices for future expansion are ale to be provided as well.

It will include on the first floor:

• 4 MSA stations with support space attached

• 18 Mental Health Offices

• 1 staff break room

• 2 group rooms

• 1 Storage closet

• 2 unisex restroom

• 1 IT Room pending VA confirmation

100 % Design level drawings have been provided as part of this submission showing in detail the layout of all of the required spaces including extra offices on the first floor for future use as discussed with the Wilmington VA.

2.2 Building 1 Interior Design Approach

1. Material selection: Materials will generally follow the VA PG-18-12 Mental Health Outpatient Services Design Guide, VA Program Guide PG-18-14 Chapter 260 for Mental Health Clinic, and Chapter 218 Veterans Assistance Unit. Color selections will be based on coordinating with existing materials used in previously renovated portions of the Wilmington VAMC. Below is a room by room finish schedule.

The suggested materials are as follows:

• Flooring: ○ LVT flooring in all areas, except as follows:

○ Porcelain tile in restrooms.

○ Carpet tile in offices.

○ Rubber flooring in stairs.

• Ceilings: ○ Lay-in ceilings for all areas. The Pettit Group would like to look into using

Sky Factory Luminous Sky Ceiling Lay-in LED panels. A sample of this can be found in the cut sheets provided in Appendix C.

○ painted GWB furred hard ceilings throughout at existing beams only.

• Walls: ○ Painted and porcelain tile in restrooms.

○ Combination of epoxy paint and high-impact wallcovering in all hallways.

○ Epoxy paint w/accent walls in all offices

○ Storefront glazing at Face 2 Face areas

• Countertops: ○ Solid surface at Face 2 Face desk areas

• Cabinets: ○ Laminate and painted metal

For further detail please refer to the Interior Design drawings provided as part of this submission.

2.3 Code Analysis

Introduction:

This narrative provides a summary of building and life safety requirements applicable to the renovation of the Auditorium within Building 01 at the Veterans Affairs (VA) Medical Center in

Wilmington, Delaware. This narrative establishes the code requirements that will maintain or increase the existing level of fire/life safety, consistent with the applicable Virginia codes.

Requirements regarding accessibility for the disabled are not included in this narrative.

Applicable Codes:

The US Department of Veterans Affairs Fire Protection Design Manual dated June 01, 2021, provides the requirements for applicable codes and standards. Per this manual, the Public

Buildings Amendment Act (PL 100-678) requires all federal agencies to follow the latest editions of national recognized fire and life safety codes. It also requires federal agencies to give local fire protection officials the opportunity to review and comment on projects for compliance with local regulations and compatibility with local fire-fighting practices.

VA has adopted the National Fire Codes published by the National Fire Protection Agency

(NFPA). Life safety requirements are specifically addressed in the Life Safety Code, NFPA 101.

Where conflicts exist between codes, the designer must follow the code specified in the text under the subject section in the VA Fire Protection Design Manual. Fire protection features not addressed by the National Fire Codes or otherwise addressed by the Fire Protection Design

Manual must be designed to comply with the requirements of the latest edition of the International

Building Code. For design features that are addressed by both the International Building Code, as well as by the NFPA 101 or a document referenced by NFPA 101, the requirements of NFPA

101 or the document referenced by NFPA 101 must be used exclusively even if the International

Building Code requirements are different.

VA buildings must also meet the requirements of NFPA 101 and documents referenced by NFPA

101 in order to comply with the accreditation requirements of the Joint Commission. Life safety and fire protection features must be designed in accordance with the requirements of NFPA 101 and its referenced documents. Other building features including but not limited to structural strength, stability, sanitation, adequate light and ventilation and energy conservation will be designed in accordance with the International Building Code and its referenced documents or as identified in VHA Program Guide PG-18-3, Topic 1 – Codes, Standards and Executive Orders.

The following summarizes the primary applicable codes and standards based on the above description:

• 2021 International Building Code

• 2021 International Existing building Code

• 2021 International Plumbing Code

• 2021 International Mechanical Code

• NFPA national fire codes including but not limited to:

o 2021 NFPA 1 fire code o 2018 NFPA 10 standard for portable fire extinguishers o 2019 NFPA 13 standard for the installation of sprinkler systems o 2019 NFPA 20 standard for the installation of stationary pumps for fire protection o 2020 NFPA 70 national electrical code o 2019 NFPA 72 national fire alarm & signaling code.

o 2021 NFPA 90A standard for the installation of air-conditioning and ventilating systems o 2021 NFPA 99 health care facility code o 2021 NFPA 101 life safety code o 2019 NFPA 110 standard for emergency and standby power systems

• Energy policy act of 2005 (epact)

• VA directives, design manuals, master specifications, & VA national cad standard application guide

• Architectural Barriers Act Accessibility Standards (ABASS) including VA supplement, barrier free design guide (pg-18-13)

• OSHA (Occupational, Safety & Health Administration) standards

• VA seismic design requirements, h-18-8

• ASME boiler & pressure vessel code

• ASME code for pressure piping

• 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 (AISC)

• DOE interim final rule: energy conservation standards for new federal, commercial, and multi-family high-rise residential building and new low-rise residential & buildings, 10 cfr parts 433, 434, & 435.

• Federal leadership in high performance & sustainable buildings: Memorandum of Understanding (MOU)

• Executive order 13423: strengthening federal environmental, energy, and transportation management.

• The provisions for construction and safety signs. Stated in the general requirements section 01010 of the VA master construction specification.

• Ventilation for acceptable indoor air quality – ASHRAE standard 62.1-2019

• Safety standard for refrigeration systems – ASHRAE standard 15-2019

Strict compliance to codes and standards is mandatory for new construction. If equivalent protection is proposed by the designer for renovations, justification must be submitted through the respective Network Safety Manager or SFPE to the Safety and Fire Protection Engineer

(10NA8) in VA Central Office.

Occupancy Classification:

Buildings containing multiple occupancies are considered mixed or separated as required by

NFPA 101. Buildings containing occupancies that are not incidental to the primary occupancy must comply with the most restrictive requirements of the occupancies involved unless separated by fire barriers in accordance with NFPA 101.

The Auditorium work area currently consists of an Assembly occupancy as defined in NFPA 101.

This space is separated from the other areas with fire barriers. The occupancy within the work area is being changed to Business as defined by NFPA 101. The space will consist of office space, storage, and support areas.

NFPA 101 Section 7.3.1.2 requires that the occupant load in any portion of the building not be less than the number of persons determined by dividing the floor area assigned to that use by the following occupant load factors:

• Assembly Use, Less Concentrated 15 square feet, net

• Business 100 square feet, gross

• Storage 300 square feet, gross

The occupant load factors used throughout the building are based upon the specific functions/uses occurring in the building. The following provides a schematic look at the calculated occupant load, which will be refined as the design progresses.

• Ground Floor: approximately 31 occupants

• First Floor: approximately 78 occupants

The Ground Floor does not require a minimum of two means of egress for the occupants as the occupant load is less than 50 people. However, the First Floor work area has an occupant load of 78 people and therefore, requires a second means of egress within the maximum permitted common path of travel. The VA is aware of the deficiency and will be seeking/granting a variance for the deficiency.

Egress through adjoining rooms or spaces is permitted provided that the rooms or spaces are accessory to the area served, are not high hazard use, and provide direct means of egress to an exit (NFPA 101 Section 7.5.1.6). In no case should access to an exit be through kitchens, storerooms, restrooms, closets or similar spaces or rooms subject to locking (NFPA 101 Section

7.5.2.1).

Plenty of exit capacity exist as the work area takes up but just a small footprint of the overall hospital building.

Building Construction Type:

The minimum required construction type for Building 01 is Type I (332) per NFPA 101 (Type IA per IBC). As such, any changes to existing structural members must be made to comply with the requirements for this construction type. In addition, all new structural members must comply to this construction type. The required fire resistance ratings for the Type I (332) construction type is as follows:

• Exterior Bearing Walls: 3 hours

• Interior Bearing Walls

Where supporting more than one floor, column or other bearing walls: 3 hours

Where supporting one floor only: 2 hours

Where supporting roofs only: 2 hours

• Columns

Where supporting more than one floor, column or other bearing walls: 3 hours

Where supporting one floor only: 2 hours

Where supporting roofs only: 2 hours

• Beams, Girders, Trusses, and Arches

Where supporting more than one floor, column or other bearing walls: 3 hours

Where supporting one floor only: 2 hours

Where supporting roofs only: 2 hours

• Floor-Ceiling Assemblies: 2 hours

• Roof-Ceiling Assemblies: 1 1/2 hours

Fire and Smoke Barriers:

Fire and smoke barriers must comply with NFPA 101. No new barriers are required, and no existing barriers are planned for modification. The existing fire barrier and smoke barrier will remain unchanged, except some penetrations for MEP may be needed and for those cases each new penetrations will be firestopped with a listed through penetration firestop assembly with a equivalent rating to the barrier being penetrated.

Interior Finish:

Wall and ceiling finishes, moveable partitions, and interior floor finish must comply with NFPA

101.

Exit Signs:

Two exit signs are not required to be visible in an exit access corridor (Healthcare Interpretations

Task Force (HITF) 98-7). Exit signs with tritium are not permitted in VA facilities.

Means of Egress Arrangement:

The following summarizes the maximum allowed common path of travel limits in the different occupancies within the work areas:

• Business: 100 feet (NFPA 101 Section 39.2.5.3.1)

• Storage: 100 feet (NFPA 101 Section 42.2.5)

The following summarizes the maximum allowed dead end corridor limits in the different occupancies within the work areas:

• Business: 50 feet (NFPA 101 Section 39.2.5.2)

• Storage: 100 feet (NFPA 101 Section 42.2.5)

The following summarizes the maximum allowed travel distances in the different occupancies within the building:

• Business: 300 feet (NFPA 101 Section 39.2.6.3)

• Storage: 400 feet (NFPA 101 Section 42.2.6)

All travel distances requirements can be met on the ground floor; however the first floor has a common path of travel deficiency as the remote area of the first floor has a common path of travel distance of approximately 143 feet from Stair 7, which is in excess of the 100 foot allowance. In addition, a newly created dead end within Corridor 200 exceeds the maximum permitted distance of 50 feet for business and ambulatory health care use (NFPA 101 section 38.2.5.2.1, IBC section

1020.5). The VA is aware of the deficiency and will be seeking/granting a variance for the deficiency.

It should be noted that during the Site Analysis phase of this project this deficiency was flagged by The Pettit Group to the Wilmington VA. The Pettit Group presented two floor layout options one showing a layout using the full space which would have a travel distance of approximately

150 feet, and one that introduced a new exit stair between the ground and first floors which would allow a code complaint travel distance. The Petit Group was directed by the Wilmington VA to proceed with the new exit stair. This stair is on the north side of the building and provides egress from the first floor down to the exterior at ground level.

Storage Rooms:

Storage rooms are considered hazardous areas and must comply with the appropriate occupancy chapter requirements of NFPA 101.

Safeguards during Construction:

Fire protection during construction must comply with VA Master Construction Specification

(VAMCS) 01 00 00, General Requirements. All occupied areas must be separated from demolition, renovation or construction activities by temporary smoke-tight construction partitions of gypsum board or other approved non-combustible or limited-combustible material. Partitions must be full height, extending through suspended ceiling to the floor slab or roof deck above and must be one-hour fire rated, unless sprinklers are installed and are operational on both sides of the temporary partition whereupon the partition may be permitted to terminate at the ceiling in accordance with NFPA 241. Where the ceiling on one side of the temporary construction barrier has been removed, the temporary partition must extend to the deck above.

Phase construction must be performed as necessary to ensure that obstructions of exits is minimized or avoided. If exits are obstructed during construction, alternate exit routes during each phase of construction must be added and shown on construction drawings.

Disruptions to fire alarm and sprinkler systems must be minimized of avoided all together. If fire protection systems are to be disrupted, procedures must be incorporated to maintain equivalent levels of fire protection and formal notification must be provided to the facility while systems are down.

3. Plumbing Design Approach

PLUMBING SYSTEMS

3.1 Existing Plumbing Systems

Existing plumbing fixtures and equipment no longer required in the renovated areas will be removed as well as any associated steam, hot water, cold water, sanitary, and vent piping.

Piping will be removed back to the existing main.

Gravity piping not extended with new work will be capped. Pressure piping not extended with new work will be capped and valved.

3.2 Proposed Plumbing Systems

1. Applicable Codes, Standards and Regulations

The applicable Codes, Standards and Regulations that pertain to this project include:

1. The 2021 International Plumbing Code published by the International Code Council (ICC)

2. National Fire Protection Association Standards referenced in codes listed.

3. Safety Code for Elevators and Escalators - ASME A17.1.

4. All current amendments, appendices, references, and supplements to the codes listed.

5. Current Adopted ASHRAE Standards.

6. VA Plumbing Design Manual PG-18-10.

7. VA Design Guides PG-18-12.

8. VA Design Alerts.

9. A/E Quality Alerts.

10. VA Technical Summaries.

2. Plumbing System Design Criteria

The existing hot water system will be connected to and distribute hot water to various plumbing fixtures and equipment. Most of the sources of plumbing systems are from the Ground Floor below.

3. Systems

a. Sanitary Drainage and Vent Systems

1) Plumbing fixtures will be drained by gravity through soil, waste, and vent piping.

b. Domestic Water Supply Systems

1) Cold Water: Connect to existing cold-water mains and distribute through valved mains and branches to plumbing fixtures and equipment.

2) Hot Water at 140ºF: Connect to existing hot water mains and distribute through valved mains and branches to plumbing fixtures and equipment.

4. Plumbing Fixtures and Equipment

a. Plumbing Fixtures

1) Materials: Vitreous china, acid resistant enameled cast iron or stainless steel, wall hung type, unless otherwise noted, with chrome plated brass trim and individual stop valves.

2) Water Closets: Wall-mounted with battery operated flush valve, using 1.28 gallons per flush.

3) Public Lavatories: Wall hung with gooseneck faucet and wrist blade handles, using 0.5 gallons per minute.

4) Fixtures for Wheelchair Accessibility: As required by program.

5) Water Hammer Arresters: Provided on branches with quick closing flush valves and solenoid valves.

6) Trap Primers: Provided to maintain the trap seal in floor drains. Either a central station type will be provided, or the individual type connected to the line serving a flush valve from the closest water closet.

b. Floor Drains: Floor drains will be provided in toilet rooms, and other locations as required.

c. Energy Conservation

1) Flow restrictor fittings on lavatories.

2) Automatic faucets on lavatories.

3) Automatic flush valves on water closets.

d. ADA Compliance (where applicable)

1) Mounting heights and clearances in accordance with ADA Section 305 and

306.

2) Flush valve rated for 5 lbs. force.

3) Faucet wrist blades.

4) Wheelchair offset supplies and tailpieces.

5) Insulation protection for exposed traps and supplies.

4. MECHANICAL HVAC SYSTEM

4.1 Existing Mechanical HVAC Systems

The existing Auditorium area is served by AHU-1-3-325-1 (6,000 cfm). A separate AHU, AHU-1-3-325-2 (12,500 cfm) serves the surrounding areas on the ground floor, 1st floor, and 2nd floor. Both AHU’s are located in mechanical equipment room 325. The existing 2nd floor shafts will remain, and ductwork will be rerouted on the 1st floor to accommodate the proposed new floor plan. The existing exterior offices on the 1st floor are supplemented with exposed horizontal fan coil units located below the existing ceiling grid. The existing horizontal fan coil units are 2-pipe with chilled water only. Existing steam radiators are located at the windows of the existing exterior offices.

Existing AHU-1-3-325-1, diffusers, registers, grilles, ductwork, mixing boxes and equipment in the renovated areas will be removed. Existing AHU-1-3-325-2 and steam radiators will remain. Ductwork associated with AHU-1-3-325-1 will be reworked to accommodate the new floor plan.

4.2 Proposed Mechanical HVAC System

1. Applicable Codes, Standards and Regulations

a. The 2021 International Mechanical Code published by the International Code Council (ICC)

b. National Fire Protection Association Standards referenced in codes listed.

c. Safety Code for Elevators and Escalators - ASME A17.1.

d. All current amendments, appendices, references, and supplements to the codes listed.

e. Current Adopted ASHRAE and IES Standards

f. VA HVAC Design Manual PG-18-10

g. VA Design Guides PG-18-12

h. VA Design Alerts

i. A/E Quality Alerts

j. VA Technical Summaries

2. Building Data

The existing Auditorium is located on the ground floor of Building 01. The building is constructed of reinforced concrete and steel frame. The existing Auditorium currently extends to the 2nd floor structure.

The ground floor area currently used for the Auditorium will be renovated to non-patient support area programming.

The 1st floor area currently above the Auditorium will have a floor installed and be programmed for mental health outpatient services.

3. Noise Criteria

The interior Noise Criteria Levels from Mechanical Equipment shall be designed to the following NC Levels:

a. Group Therapy Rooms: NC 35.

b. Service/Support Areas: NC 45.

c. Counselor Offices: NC 35.

d. Private Offices: NC 35.

e. Corridors: NC 40.

f. Public Areas: NC 40.

4. Exterior Environmental Criteria

a. Indicated exterior environmental criteria are based on data provided in the VA HVAC Design Manual (Rev. 11/1/21) referencing the 2013 ASHRAE Fundamentals Handbook.

DB WB

Summer

Building Heat Gain 91.9 °F 75.0 °F

Winter

Building Heat Loss 13.3 °F -

5. Interior Environmental Criteria

a. Indicated interior conditions are design criteria on which equipment capacities are specified at the exterior conditions listed in the preceding paragraph. All normally occupied areas will be air-conditioned. Areas such as toilet rooms, general storage, closets, and similar spaces will generally be heated and ventilated, but will not be cooled.

SPACE

SUMMER WINTER

AIR

CHANGES

PRESS

DB

RH

(MAX)

DB

RH

(MIN)

Group Therapy Room 75°F 60% 70°F 30% 4 0

Counselor Office 75°F 60% 70°F 30% 4 0

Restrooms NA NA NA NA 10 Double Negative

Private Office 75°F 60% 70°F 30% 4 0

Corridors 75°F 60% 70°F 30% 4 Positive

All rooms listed above are not necessarily applicable to this project. List will be updated as the program spaces are determined.

b. Specific Room Criteria

The new ground floor non-patient support area and 1st floor mental health outpatient area will be designed as 4-pipe fan coil units with outside air being ducted to each fan coil unit from a new dedicated outdoor air system. Each space will have its own individual control unless otherwise noted.

Due to the low beams on the 1st floor, the new 1st floor mental health outpatient services area will be designed as 4-pipe fan coil units with outside air being ducted directly to each space with a dedicated diffuser from a new dedicated outdoor air system. Each space will have its own individual temperature control unless otherwise noted.

Perimeter hot water heat will be provided in new exterior spaces per the VA HVAC Design Manual.

SPACE EXHAUST RETURN TRANSFER

AIR General Special Yes No

Group Therapy X

Counselor Office X

Restrooms x X

Private Office X

Corridors X

All rooms listed above are not necessarily applicable to this project. List will be updated as the program spaces are determined.

6. Cooling System

a. Cooling System Design Concept

Existing chilled water pipes are connected to the existing AHU-1-3-325-1 serving the proposed ground floor area. AHU-1-3-325-1 will be replaced with a dedicated outdoor air system (DOAS) to serve the new fan coil units. The new DOAS will utilize the existing chilled water piping routed to AHU-1-3-325-1.

A new set a chilled water lines will tie into existing nearby chilled water mains to provide chilled water to the new fan coil units.

b. Cooling System Design Criteria

COMPONENT

TEMPERATURES

Entering Water Leaving Water

AHU Cooling Coils (30% PG) 42 °F 52 °F

FCU Cooling Coils (30% PG) 42 °F 52 °F

7. Heating System

a. Heating System Design Concept

Existing steam piping is connected to the existing AHU-1-3-325-1 serving the proposed ground floor area. AHU-1-3-325-1 will be replaced with a dedicated outdoor air system (DOAS) to serve the new fan coil units. The new DOAS will utilize the existing steam piping routed to AHU-1-3-325-1.

A new steam-to-liquid shell and tube heat exchanger and associated pumps will be installed where AHU-1-3-325-1 was located to provide heating water, without glycol, to the new fan coil units and perimeter heat.

b. Heating System Design Criteria

The new DOAS and steam-to-liquid heat exchanger will be designed for 5 psig steam.

c. Heating Equipment and Source: Capacities will be verified through detailed computer calculations as the design proceeds. 25% spare capacity will be included in new equipment for future.

1) Heating Hot Water System: Tie new 4-pipe fan coil units into new heating hot water system.

2) Non-Air-Conditioned Spaces: Through hot water unit heaters and convectors.

3) Toilet Rooms: All toilet rooms with an exterior wall or will be heated by hot water convectors/ radiation.

8. Air Handling Systems

a. Air Handling Systems Design Concept

The spaces will be served by a new dedicated outdoor air system. The unit will be constant volume system using 100 percent outdoor air. Air will be distributed to directly to each space. 25% spare capacity will be included in new equipment for future.

b. Dedicated Outside Air System

1) Factory Assembled, Modular Construction Air Handling Unit: All components will be enclosed in factory assembled, double-walled insulated panel casing.

The unit shall have an outdoor air plenum, combination pre-filter section (MERV 8 and MERV 11), enthalpy heat recovery plate (between relief air stream and outdoor air stream), steam preheat coil, steam humidifier, access sections, chilled water coil with UVC light, direct drive plenum supply air fan section, final filter section (MERV 14), and discharge plenum. A stainless-steel drain pan, double sloped to provide positive drainage, will be in the cooling coil, outdoor intake, and heat recovery sections. The chilled water coil will be connected to the existing primary chilled water system. The new chilled water flowrate is anticipated to be equivalent to the existing air handling unit’s, due to the lower airflow requirements, ensuring the existing chilled water lines will provide sufficient flow. Air will be ducted through low pressure sheet metal ducts in concealed spaces and above the ceiling to the fan coil units in each room, unless otherwise noted.

2) Dehumidification: Dehumidification will be handled by the combined operation of the new DOAS and fan coil units. The DOAS cooling coil will maintain a constant unit discharge air temperature of 55-degree F for moisture removal from the air. Hot water reheat coils in the room fan coil units will maintain space temperature.

3) Humidification: A steam humidifier served by building steam will be in the

DOAS.

4) Fans: Air handling unit fans will be centrifugal with airfoil or backward inclined blades, plenum type, or fan array as appropriate.

5) Room Terminal Units: 4-pipe fan coil units will supply all spaces. Chilled water-cooling coils, and hot water heating coils, mounted on box discharge side, will be used.

6) Ductwork

a) Galvanized steel round and rectangular sheet metal for supply and exhaust air.

b) Insulated flexible duct for maximum 5 feet runouts to the terminal units.

7) Diffusers, Registers, and Grilles

a) Factory fabricated steel or aluminum with fixed or adjustable air discharge pattern and opposed blade damper for diffusers and registers with white enamel finish.

b) Sidewall supply and exhaust registers and grilles where applicable with vertical face and white enamel finish.

c) Modular Square louvered faced diffusers for ceiling finishes.

d) Square louvered faced return or exhaust air grille for ceiling finishes.

c. Ventilation, Filtration, and Area Pressurization: 100 percent outdoor air will be provided from the DOAS to the fan coil units for ventilation air. Filtration will be provided with dry-type, disposable filters providing average atmospheric dust spot efficiency per ASHRAE Standard 52, as indicated for air handling units and fan coil units.

Pressurization will be provided to maintain the pressure relationships required by the VA.

d. Air Distribution

1) Supply: Air distribution will be, in general, overhead through ceiling mounted diffusers, where applicable. Air will be distributed through ducts above the ceiling.

2) Return: In general, overhead through ceiling mounted return registers. Air will be returned though ducts above the ceiling.

3) Fan Coil units will recirculate air within individual spaces to provide total air change requirements.

4) Exhaust Air Systems: The new toilet exhaust will tie into the DOAS exhaust for energy recovery.

e. Proposed Air Handling Equipment Locations: The new dedicated outdoor air system will be located on the second-floor roof adjacent to the mechanical room housing AHU-1-3-325-1.

f. Proposed Reserve Air Handling Equipment Capacity: None

g. Energy Conservation for Recovery for Air Handling Systems

1) NEMA Premium efficiency motors.

2) Reduced air quantities in spaces when unoccupied but still maintaining required pressure relationships.

9. Automatic Temperature Controls

a. Automatic Temperature Controls Design Concept:

Automatic control system shall be direct digital control with electronic actuation complete with necessary electrical interlocks, protective devices, and associated control wiring.

b. Control Equipment

1) Direct Digital System: Control shall be performed by a field programmable

Digital System Controller (DSC), microprocessor based, which incorporates direct digital control, energy management functions, and provides for digital display and local adjustments of desired variables at the control cabinet.

2) Control Center: Tie into the existing system for monitoring, control, setpoint adjustment, and energy management functions.

3) Room Thermostats

a) Adjustable Range

Heating Only Control: 55 to 75ºF.

Cooling Only Control: 70 to 85ºF.

Heating and Cooling Control: 55 to 85ºF.

b) Protective Guards: Cast or heavy gage stamped metal or other suitable material guards will be provided for temperature sensors in areas subject to damage.

c) Special Features:

(1) Single setpoint temperature sensors shall have a 10 degrees F adjustable bandwidth with a sensitivity capable of holding the setpoint at plus or minus ½ degree F with bandwidth set at minimum position.

(2) Deadband thermostats shall have two distinct setpoints with a 10 degrees F adjustable deadband between heating and cooling setpoints. Minimum deadband shall be 3 degrees F or less.

d) Schedule: Thermostats will be provided without thermometers and with concealed adjustments unless indicated otherwise in the following schedule:

EXTERNAL SPACE EXTERNAL

THERMOMETER

OR DIGITAL

DISPLAY

EXTERNAL

ADJUSTMENT

SINGLE

SET-

POINT

DEADBAND

Group Therapy Room x x x

Counselor Office x x x

Private Office x x x

Corridors X

All rooms listed above are not necessarily applicable to this project. List will be updated as the program spaces are determined

c. Zoning

1) In general, air-conditioned areas will be zoned by occupancy and thermal characteristics.

2) Temperature and humidification control points within the limits of the system provided will be as follows:

a) Group Therapy Rooms: One temperature control point for each area.

Humidification will be provided through the primary air system.

b) Counselor Offices: One temperature control point for each office.

Humidification will be provided through the primary air system

c) Private Offices: One temperature control point for each office.

Humidification will be provided through the primary air system.

d. Energy Conservation:

1) Controller with automatic reset to improve leaving air temperature control and decrease chilled water flow.

2) Night setback of space temperatures in winter.

3) Night set-forward of space temperatures in summer.

4) Supply air temperature reset.

5) Reduced air supply to unoccupied areas.

5. ELECTRICAL SYSTEMS

Existing Electrical Systems and Distribution

5.1 General

The existing electrical power distribution within the project area has limited capacity for additional circuits and power required for the project scope. Existing panels are served from one (1) main panel on the ground level served from the building’s main electrical switchboard within the main electrical room. Existing panels can accommodate minor renovations, however new distribution will be required to be extended from the main electrical switchboard to new panels for service to lighting, receptacles, and mechanical loads.

5.2 Normal and Emergency Power Distribution

The main electrical service room for this building is located on the other side of the hospital from the project area. The 480/277V normal electrical distribution system in building is supplied by 1500kVA substation. The 480V distribution serves the motor control center that supplies power for the project area’s air handling units. The 208/120V normal electrical distribution system is supplied by 2000A rated switchboard. The switchboard serves a 200A panelboard LPGA within the project area that serves other panels on the Ground and first floor. The emergency electrical service in the project area is a 100A, 208/120V, 3-phase panel that serves selected egress circuits.

5.3 Branch Panelboards

In the project area, there are four panelboards located on the ground floor and three panelboards located on the first floor in nearby electrical closets. Existing normal panels have limited capacity. The following is a description of the existing panelboards that serve the area of renovation:

• Panelboard LPGA-A:…