Public Safety Complex 35 Percent Basis of Design.pdf

Portsmouth Public Safety Complex 35% Submittal Documents

Portsmouth, Virginia

Basis of Design Not for Construction or Regulatory Approval

January 16, 2024

CN #10205

4525 Main Street, Suite 1400 Virginia Beach, Virginia 23462

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Portsmouth Public Safety Complex 35% Submittal Documents

BASIS OF DESIGN

Table of Contents

1. GENERAL

2. BASIS OF DESIGN OVERVEW

3. CIVIL/LANDSCAPE

4. ARCHITECTURAL/INTERIORS

5. STRUCTURAL

6. PLUMBING

7. HEATING, VENTILATING AND AIR CONDITIONING

8. FIRE PROTECTION

9. ELECTRICAL

10. ELECTRONIC SYSTEMS

11. SUSTAINABLE DESIGN

1. GENERAL

A. Project Overview

The purpose of this project is to document the needs for consolidating the Portsmouth Police and Fire Departments. Currently, the departments are spread out over antiquated existing buildings and various other leased spaces throughout the city. The existing facilities are inadequate, sustainably obsolete, and overshadowed by deferred maintenance that limits the ability to function as modern-day public safety entity. The project intent is to establish stronger connectivity within the departments by significantly increasing productivity and response time to ultimately offer a safer environment for the City of Portsmouth.

B. Goals

Overall, this project seeks to create a facility that meets goals based on consolidation and optimization of staff arrangements for maximum efficiency and collaboration.

Project goals are listed below:

• Design a modern Public Safety Headquarters that is in line with the talent of the men and women in uniform it represents.

• Maximize safety through design with active and passive measures while still offering an inviting environment for public engagement.

• Reorganize departments to increase productivity and efficiency by consolidating the groups and functions into one facility.

• Design an uplifting facility that inherently increases retention and draws in new talented individuals and recruits.

2. BASIS OF DESIGN OVERVEW

This Basis of Design (BOD) narrative has been prepared by discipline professionals to define the anticipated design needs that will need to be considered as this project moves into future design and construction phases. This will serve as a baseline for project requirements and will also be used when developing the rough order of magnitude cost estimating for the project that will shape future funding needs for the City of Portsmouth.

3. CIVIL/LANDSCAPE

A. Location

The project is located on Willett Drive and West Road in Portsmouth, Virginia.

Willett Drive Site The Willett Site concepts are bounded on the west side by West Road, north side by Willett Drive and the east by the baseball field complex and a Maryview hospital parking lot.

West Road Site The West Road Site concepts are bounded on the west side by West Road, north side by Hartford Street and on the south by Willett Drive.

B. Site Layout

Willett Drive Site The new main building for the Willett Site will be located along the intersection of Willett Drive and West Road. Fleet parking will be located behind the building in a fenced and gate-controlled parking lot.

The Warehouse building will be located north along Willett drive. Drive-through vehicle bays will be accessed through the fleet parking lot. All bays will exit north and west onto Willett Drive.

Access to the baseball complex will be maintained using the existing southeast drive along West Road. New parking and paved drive for the complex will be added.

West Road Site The new main building for the Willett Site will be located along the intersection of Willett Drive and West Road. Fleet parking will be located behind the building in a fenced and gate-controlled lot.

The Warehouse building will be located north along Willett Drive, just south of the school soccer field. Drive-through vehicle bays will be accessed through the fleet parking lot. All bays will exit north and east onto Willett Drive.

C. Site Access

Willett Drive Site

Visitor Access: Visitor parking for the new building will be provided at the southeast corner of the property and west of the main entrance. Approximately 61 visitor parking spaces have been provided including 11 handicapped accessible parking spaces. Bollards will prevent vehicle entry onto the raised building entry plaza. A visitor drop-off area has been provided near to the visitor entrance accessed from West Road.

Access: A secure fleet parking lot has been provided for staff and official vehicles. The lot will be accessed via a proximity card reader that controls a retractable vehicle barrier and electric sliding gate. There will be two points of entry, one from West Road and one from Willett Drive.

Loading Dock Access: Loading dock access will occur within the secure fleet parking lot at the northeast corner of the building.

Sally port: A secure sally port will occur within the secure fleet parking lot on the east side of the building, south of the loading dock area.

West Road Site

Visitor Access: Visitor Parking for the new building will be provided at the northeast corner of the main building and west of the main entrance. Approximately 45 visitor parking spaces have been provided including 10 handicapped accessible parking spaces. Bollards will prevent vehicle entry onto the raised building entry plaza. A visitor drop-off area has been provided in front of the entry plaza accessed from Willett Drive.

Access: A secure fleet parking lot has been provided for staff and official vehicles. The lot will be accessed via a proximity card reader that controls a retractable vehicle barrier and electric sliding gate. There will be three points of entry, one from Willett Drive, one from West Road and one from the roundabout in Hartford Street.

Loading Dock Access: Loading dock access will occur within the secure fleet parking lot on the north side of the building.

Sally port: A secure sally port will occur within the secure fleet parking lot on the north side of the building, south of the loading dock area.

D. Utilities

Water Existing 8” water mains are located in West Road and Willett Drive on the far side of both roads. Two existing domestic meter boxes are located along West Road. Two fire hydrants are located along Willett Drive.

Domestic water will be provided via 4” connections equipped with 2” domestic meters in Willett Drive and West Road. The West Road connection will reuse an existing meter box. Open trench utility installation in Willett Drive will be required for the new domestic water connection. Fire water will be provided via an 8” connection in Willett Drive equipped with a detector check.

Sewer A gravity sanitary sewer main is located in West Road. Sanitary sewer service will be provided via 8” gravity connection to an existing manhole in West Road.

E. Vegetation, Bodies of Water, Topography, and Soil Conditions

Willett Drive Site The existing vegetation in the location of the Main Building consists of mature trees between the recently demolished Willett Hall and the intersection of West Road and Willett Drive. Mature trees also exist along these two streets. The concept preserves the existing trees to the greatest extent possible. A few trees will need to be removed for access drives. The northeast portion of the site is open grass area and existing baseball fields. The development of Site will require removal of two fields.

West Road Site The existing vegetation on this site consists of a few mature trees between the DAC Center and the parking lot at the corner of West Road and Willett Drive. Mature trees also exist along West Road. The remainder of the site is lawn. The concept preserves the existing trees along the streets but removes the internal vegetation.

F. Existing Pedestrian and Vehicular Access

Pedestrian walkways exist along the southeast side of Willett Drive and on the north side, east of Willett Drive. Site improvements will preserve pedestrian walkways located along West Drive and Willett Drive. ADA accessible ramps will be added at vehicular entrances from West Road and Willet Drive.

G. Proposed Site Improvements

Site improvements to support the facilities will include sidewalks and handicap ramps to the new doorways. All new entrances will be ADA accessible. Site improvements will preserve pedestrian walkways located along West Drive and Willett Drive. ADA accessible ramps will be added at vehicular entrances from West Road and Willet Drive.

H. Proposed Contours, Bodies of Water, and Landscaping Improvements

Willett Drive Site The finished floor elevation of the new buildings will be at elevation 13, approximately one foot above the existing grade.

Landscape material selected will be drought tolerant. Existing mature trees will be preserved. The design will include foundation plantings and trees to enhance the campus setting. Plantings will also be provided to provide a street buffer and meet City ordinances. Turf areas will be seeded with Bermuda grass.

West Road Site The finished floor elevation of the new buildings will be at elevation 14, approximately four feet above the existing grade. The proposed parking lot grading will be raised from approximately 8 to elevation 11.

Landscape material selected will be drought tolerant. Existing mature trees will be preserved. The design will include foundation plantings and trees to enhance the campus setting. Plantings will also be provided to provide a street buffer and meet City ordinances. Turf areas will be seeded with Bermuda grass.

I. Stormwater

The stormwater management strategy for both building sites will meet or exceed Virginia DEQ Stormwater Management Program requirements. Compliance will be met by using the Virginia Runoff Reduction Method (VRRM) to design BMP’s to meet water quality compliance. Water quantity requirements will be met by using Virginia Stormwater Design Specifications for channel and flood protection and any applicable stormwater management requirements for the City of Portsmouth. Landscaping will be used, where feasible, to visually enhance the stormwater management features.

Willett Drive Site The Willett Drive Site alternative is proposed to utilize Level 1 constructed wetlands, level 2 wet ponds, level 1 and 2 bioretention basins, a grass channel with compost amended soils, and sheet flow to compost amended soils, to meet water quality and quantity requirements. Site drainage from the proposed buildings and paved areas will be directed to stormwater management through roof drains and underground runoff conveyance system consisting of reinforced concrete pipe (RCP) and Virginia Department of Transportation (VDOT) standard drainage structures. It is anticipated that stormwater management facilities will be located around the perimeter of the site, adjacent to Willett Drive and West Road. To maximize effectiveness, stormwater management facilities will be routed to drain in series to form “treatment trains” that provide additional pollutant removal and runoff reduction. Stormwater management facilities will outfall to existing storm sewer infrastructure located in Willett Drive and West Road. Existing storm sewer drains north where it discharges into an outlet of the Elizabeth River. The location of the buildings, parking areas and BMP for this site are partially within the 500 Year floodplain. The building will be built to the minimum elevation required.

West Road Site The West Road Site alternative is proposed to utilize a Level 1 wet pond to meet water quality and quantity requirements. Site drainage from the proposed buildings and paved areas will be directed to the wet pond through roof drains and an underground storm conveyance system. It is anticipated that the pond would be located north of the proposed buildings and parking lots, south of Hartford Street. The pond would outfall into the existing storm piping that discharges into an outlet of the Elizabeth River. The location of the buildings for this site are partially within the 500 Year floodplain. The building will be built to the minimum elevation required. The wet pond and the northeastern portion of the parking lot would be located at the current low-lying area that is currently in the 100 Year floodplain (Zone AE).

J. Exterior Amenities:

The following is a general description of the materials for exterior amenities for both concepts:

K. Elevated Plaza:

a. A terraced plaza will guide visitors to the main building entry.

b. Integral color concrete or pavers will coordinate with the main entrance flooring.

c. At grade planting areas to contain lawn, groundcovers, shrubs & tall grasses along with ornamental and shade tree.

d. Pedestrian pathways from the parking to building entry points.

e. Screenwall/plantings at loading dock/dumpster area.

f. Various seating areas and types within the plaza with planters to soften the space.

L. Entry Dropoff:

a. 80 feet long drop off to accommodate approximately several vehicles.

b. Bollards to separate vehicle from pedestrian pathways.

4. ARCHITECTURAL/INTERIORS

A. Introduction

The new Portsmouth Public Safety complex will be a consolidated headquarters for the Police and Fire Departments. It will consist of a two-story main building, a one-story Warehouse Facility, and a one-story Training Building (firing range). Additional departments that will be housed in the main buildings are the Magistrate Office and City IT support staff. The warehouse facility predominantly stores Fire and Police apparatus and fulfills additional storage needs for the departments.

Leading up to the entry of the main building are organically contoured steps to an elevated plaza that offers an inviting interface with the public. The main lobby is a double high-volume space that is accented with heritage displays from the Police and Fire Departments. The procession of the lobby interfaces with a 200-person conference room that is subdivided and will be used for public events, Police and Fire Training, and various other internal department meetings. Other primary spaces directly connected to the lobby are Police Records, Fire Department Credit Union, and restrooms. Directly down the hall from the lobby is a 60-person briefing room and office for CIT and Magistrate.

The support function spaces on first floor are lockers rooms, gym, commercial kitchen with dining, small staff lobby, sally port, shipping and receiving area, utilities rooms, and basketball court that is junior police league and double functions as sleeping quarters for staff during hurricane events. The remainder of first floor staff spaces consist of Police and Fire Training, Property and Evidence Storage, and the Forensics Lab.

The second floor is separated into two wings that houses the Police Department on one side and the Fire Department on the other. The Police Department has 12 offices spaces with interdepartmental shared conference room, print/copy spaces, and breakrooms.

There are also private interview rooms with access to an elevator that leads down to the sallyport. The Fire Department consists of four offices spaces and two critical facilities of 911 Call Center and Emergency Operations Center.

Directly adjacent to the rear of the Headquarters building sits the Training building. The one story precast concrete structure houses an eight-lane shooting range and its support spaces.

At the rear of the complex is a gated parking lot that has approximately 460-spaces for the staff personal and department fleet vehicles. On the side of the parking lot is a warehouse facility that is a pre-engineered metal building that takes advantage of large spans needed for high bay storage and large fire and police apparatus.

B. Codes Analysis

a. Refer to Life Safety Drawings for Applicable codes for the Headquarters, Warehouse and Training Building.

C. Architectural Design - Headquarters

1. Style and Character

The exterior design blends traditional architectural principles and durable materials with a contemporary aesthetic that ties strongly to the Portsmouth heritage. The building footprint is an elongated shape to keep a low-lying presence in an adjacent residential community. This massing strategy reinforces the suburban fabric by setting the building off the street edge and keeping a modest visual presence while still capturing the essence of a municipal building.

The wing façades are arranged in a traditional fashion with a base-middle-top organization. The wings are divided by storefront glazed entry plaza that forms an inviting volume from the streetscape. The staff members receive natural light from individual windows, which are arranged in syncopated rhythms and combined into larger groupings to modulate the façade scale and generate visual interest. Generous expanses of corner glazing highlights amenity spaces.

Rooftop mechanical penthouses will be set back and incorporated into the building’s massing and architectural expression.

2. Window Wall

Majority of the glazing will be aluminum nailing flange windows with 1-inch-thick clear insulating glass units with clear low-emittance (low-E) coating on the second surface, heat treated as required to comply with code requirements, sustain wind loads, and resist temperature stress breakage.

The Glazing for the Basketball Court, Fire Administration, Fire Marshalls, EMS Division Emergency Operations Center (EOC) will have a Minimum 1-3/16-inch-thick clear insulating glass units with clear low-emittance (low-E) coating on the second surface, heat treated as required to comply with code requirements, sustain wind loads, and resist temperature stress breakage. Insulating glass units will have laminated inner lights to meet blast and shatter-resistant window protection requirements. Laminated inner lights will consist of 2-layers of 3/16-inch thick glass and a 0.060-inch thick polyvinyl butyral sheet interlayer.

The Magistrate and Communication areas will have level 4 ballistic glazing on the exterior. The public interface transaction window for Magistrate, Records and Property and Evidence will have ballistic level 4 glazing.

Insulating glass units will be glazed in a thermally broken fluoropolymer coated aluminum frame. Finish for all aluminum framing will be a 2-coat fluorocarbon resinous coating with a metal flake finish on the exterior and a polyester enamel finish on the interior. Thermal breaks for the aluminum framing will be applied for all external elements. Insulating glazing will be set to the window wall framing with structural silicone sealant on all four sides at the interior structural seal and with conventional silicone glazing gaskets on all four sides at the exterior weather seal.

3. Brick

Brick is the most predominate material on the façade with color being a reddish hue. The Utility Shape (dimension of 3-5/8” x 3-5/8" x 11-5/8”) brick will be set in a third bond to accentuate the horizontal components of the elevations.

There will also be bands of 1/2-inch reliefs to visually carry horizontal architectural relationships between complimenting materials of metal panel and precast.

4. Metal Panel

Metal panels will be selected from standard color of composite wall panels similar to Alucobond set on 2-1/2-inch rigid insulation over a fluid applied air barrier over two layers of 3/4-inch exterior grade fire rated treated plywood and anchored to cold form metal framing. Metal panels will be fluoropolymer coated aluminum. Window wall framing will be aluminum members with a continuous thermal break as required. Metal panels will also be utilized for column covers, spandrel panels, coping panels, soffit panels, and trim.

5. Precast Architectural Concrete

Precast architectural concrete panels insulated with a sandwich panel with reveals will have acid-etched or light sandblast finishes. Panels will be connected to the building's structural frame and will provide anchorage for window walls and doors. The sandwich system will have 2-inch precast on exterior insulation over 2-1/2-inch rigid insulation over 6-inch precast backing.

The panels will have continuous stainless-steel flashing at the back of the panels at every floor and at every window/door head and sill. All vertical and horizontal working joints in the precast architectural concrete panels will be sealed with silicone sealant to achieve a pressure equalized system.

6. Cast-in-Place Architectural Concrete

Cast-in-place architectural concrete plaza and planters will have special concrete materials, formwork, placement, and finishes.

7. Architectural Precast Concrete

All exterior walls above grade will be insulated with foil-faced rigid fiberglass insulation boards. Insulation will have a total R-value of 13 minimum at brick walls, steel framed, window and curtain walls, and the vapor barrier will have a perm rating of 0.02 maximum. Miscellaneous fiberglass insulation will have an integral foil vapor barrier on the interior face. All joints and edges of foil vapor barrier will be sealed with vapor barrier tape.

8. Louvers

Extruded aluminum stormproof drainable blade louvers with a fluoropolymer custom color finish to match the metal panel. All active louvers will have a bird-screen consisting of 1/2 by 1/2-inch aluminum wire mesh with a matte black finish. All inactive louvers will be sealed with insulated aluminum blank-off panels installed on the interior louver surfaces. Finish of blank-off panels will be matte black.

9. Roll-up Doors

The roll-up doors for Shipping/Receiving, both ends of the Sally Port, and the Vehicle Forensic Bays will be 12’ x 12’ roll-up doors. Each bay will be protected by an encased steel channel frame and concrete bollards on the interior and exterior. The R value for the door will be R-16 and finish to match the metal panel for the building.

10. Roof

Membrane roofing and waterproofing system will be a fabric backed fully adhered PVC roof that is 90-mils thick. 60-mils of PVC and 30-mils fabric reinforcing. The full roof system will be in following layers: 90 mil fully adhered PVC roof, over 2 layers or 2 1/2” rigid insulation (5” total with a combined R value of R30) over an air barrier over 1/2” cover board over steel deck.

11. Metal Panel Soffit with Wood Finish

The front entry soffit will be a 6-inch-wide exterior metal ceiling system with a wood finish to bring in warm wood tones to offer an inviting connection.

D. Architectural Design - Warehouse

1. Style and Character

The Warehouse’s architectural character is designed in a style to match the main building’s material pallet. This is achieved by utilizing the same brick and metal panel color on the exterior façade. A rhythm is created to scale down the massing by using a series of roll up doors with clear story windows above and downspouts set between.

2. Window Wall

The clear story and main entry glazing will be 1-inch-thick clear insulating glass units with clear low-emittance (low-E) coating on the second surface, heat treated as required to comply with code requirements, sustain wind loads, and resist temperature stress breakage.

Insulating glass units will be glazed in a thermally broken fluoropolymer coated aluminum frame. Finish for all aluminum framing will be a 2-coat fluorocarbon resinous coating with a metal flake finish on the exterior and a polyester enamel finish on the interior. Thermal breaks for the aluminum framing will be applied for all external elements. Insulating glazing will be set to the window wall framing with structural silicone sealant on all four sides at the interior structural seal and with conventional silicone glazing gaskets on all four sides at the exterior weather seal.

3. Brick

Brick is the most predominate material on the façade like the main building and will be the same reddish hue, Utility Shape and set in a third bond. The brick will be backed up by an 8-inch CMU block wall with fluid applied air barrier and 2-1/2-inch rigid insulation.

4. Metal Panel

The metal will be a 3-inch ribbed panel that will run from column to column of PEMB structure. The color for metal panel will match the composite metal panel for main building.

5. Roll-up Doors

14’ x 14’ roll-up doors at each bay will be protected by an encased steel channel frame and concrete bollards on the interior and exterior. The R value for the door will be R-10 and finish to match the metal panel for the building.

6. Roof

A standing seam metal roof will be used over the Pre-Engineering Metal Building (PEMB). The standing seam metal roof over the PEMB will incorporate prefinished metal gutters and downspouts to match the adjacent metal wall panels. The insulation under the roof will be R-30 with a continuous roof barrier.

E. Architectural Design - Training

1. Style and Character

The Training building (firing range) is designed with tilt up precast concrete façade on the exterior with the color matching the precast on the main building.

The insulated precast panels will have a 1” “V” grooves pattern set to create a sense of scale that is relatable to Headquarters building. Also, a rhythm of conductor heads and downspouts are set on predominate façade to further breakdown the scale of building.

2. Window Wall

The training building has no exterior windows.

3. Roll-up Doors

14’ x 14’ roll-up door that will be protected by an encased steel channel frame and concrete bollards on the interior and exterior. The R value for the door will be R-10 and finish to match the metal panel for the building.

4. Roof

The membrane roofing and waterproofing system will be 60-mils of PVC. The full roof system will be in following layers: 60 mil fully adhered PVC roof, over 2 layers or 2 1/2” rigid insulation (5” total with a combined R value of R30) over an air barrier over 4” precast double tees.

F. Vertical Circulation – Headquarters

1. Elevators, 3500 lb., 1500 fpm, 2-stops, single speed center opening, 42-inches wide opening, 8’ x 0” entrance height.

2. Fire Stairs, steel pan, sealed concrete tread stair finish with grooved abrasive nosing and pipe and tube guardrail and railing.

3. Staff Atrium Stair, terrazzo tread stair finish with grooved abrasive nosing and bar stock guardrail and pipe handrail.

G. Interior Design

1. Interior Overview

Interior finish materials will be selected based on product durability, appearance retention, sustainability, ease of maintenance and cleanability, as well as the ease of replacement if damaged. Finish materials will be selected to produce and optimally functional facility, consistent with quality commercial design and use in public safety facilities. Preference will be given to products that have sustainable design characteristics (i.e. recycled content, biobased content, and cradle-to-cradle life cycle) or that help to promote the City of Portsmouth’s mission to “protect the lives and property of the citizens and visitors”. The materials selected will produce an end product that creates a safe environment for Police, Fire, and EMS personnel working within the building as well as the general public that frequents it. Materials will also complement the modern aesthetics of the architecture and represent a clean, streamlined, and organized facility.

a. Structural Interior Design – Main Building

Public Lobby and Major Circulation Space The public lobby space will have a broadcast epoxy terrazzo resinous flooring with a mix of marble and glass aggregate with a minimum of 2 accent colors to create a visually interesting space that is durable and resistant to wear. The base will be integral 4”H flash cove terrazzo base that is complimentary to flooring. The walls will primarily consist of satin or eggshell finish, latex painted gypsum board with select accent paints provided throughout to create visual interest and aid in wayfinding.

Within the circulation corridors, Acrovyn protective vinyl wall covering and Acrovyn gun rails will be provided at a wainscot height to create a welcoming aesthetic while providing added durability and protection from officer utility belts and general circulation of maintenance carts.

The public lobby space ceiling will be a combination of a suspended wood plank ceiling system and painted gypsum soffits. Circulation corridor ceilings will consist of a combination of a high Noise Reduction Coefficient (NRC) acoustic ceiling tile with a 15/16” exposed grid system and painted gypsum soffits to create space divisions and visual breaks.

Administrative Areas (Office Suites, Open Offices, Private Offices) The Administrative areas (including Squad offices, EMS offices, Fire offices, Training offices, Magistrate, and C.I.T space) will consist primarily of a modular style carpet tile consisting of a field tile and accent carpet to create visual interest. Wall base will consist of 4”H rubber millwork style base throughout occupied spaces to provide an upgraded aesthetic. The walls will consist of satin or eggshell finish, latex painted gypsum board or CMU. One accent paint will be selected and provided on one wall per private office and open office area. The ceiling in these spaces will be a high NRC acoustical ceiling tile with a 15/16” exposed grid system.

Records Records will consist primarily of a modular style carpet tile consisting of a field tile and accent carpet to create visual interest. Storage areas within the space will utilize a plank style luxury vinyl tile with a minimum 20 mil urethane integral coating with chemical additive for durability. Wall base will consist of 4”H rubber millwork style base throughout occupied spaces to provide an upgraded aesthetic. The walls will consist of satin or eggshell finish, latex painted gypsum board. One accent paint will be selected and provided on one wall per private office and open office area. The ceiling will be a high NRC acoustical ceiling tile with a 15/16” exposed grid system.

Property & Evidence Property & Evidence will be a utilitarian space consisting of concrete with a clear sealer applied in storage areas. Wall base in storage areas will be a 4”H rubber, rolled goods style cove base. The Officer Lobby and Vestibule within this space will utilize a resinous urethane floor with integral 4”H base for a seamless durable finish. The walls will consist of satin or eggshell finish, latex painted gypsum board or CMU. The Office Lobby and Vestibule walls will incorporate full-height Acrovyn protective vinyl wall covering to provide added durability and cleanability to the space. The ceilings will be exposed painted structure, with the exception of the Officer Lobby, which will have a cleanable acoustical ceiling tile with a 15/16” exposed grid system.

Interview & Hearing Rooms Interview and Hearing Rooms will consist of a modular style carpet tile.

Wall base will consist of 4”H rubber millwork style base throughout occupied spaces to provide an upgraded aesthetic. The walls will consist of satin or eggshell finish, latex painted gypsum board. The ceiling will be a high NRC acoustical ceiling tile with a 15/16” exposed grid system.

Holding Cells Interview rooms and holding cells will have resinous urethane floors with an integral 4”H base for a seamless easily cleaned space. The walls will be either Satin or Eggshell, latex painted high-impact gypsum board or Epoxy painted CMU. The ceiling will be painted high-impact gypsum board to prevent tampering.

Commercial Kitchen & Cafeteria The commercial kitchen area will receive quarry tile floor and 4”H wall base. The kitchen walls will receive full-height moisture and stain resistant rigid sheet wall protection and heavy-duty stainless steel corner guards for durability and longevity. The ceiling will be a cleanable humidity and stain resistant acoustical ceiling tile with a 15/16” exposed grid system. Casework will be stainless steel counter tops, backsplashes, and side splashes with plastic laminate base and upper cabinets for hygiene, durability and longevity.

Staff Break Rooms Staff break rooms will have a plank style luxury vinyl tile flooring with a minimum 20 mil urethane integral coating with chemical additive for durability. Wall base will consist of 4”H rubber, millwork style base throughout. Walls will be satin or eggshell, latex painted gypsum with one accent paint within each break room. The ceiling will be a combination of a high NRC acoustical ceiling tile with 15/16” exposed grid system and painted gypsum. Casework will be solid surface counter tops, backsplashes, and side splashes with plastic laminate base and upper cabinets for hygiene, durability and longevity. Ceramic tile will be installed between upper and lower cabinets.

Emergency Operations / Dispatch Center The EOC / Dispatch Center spaces will consist of a static resistant, modular carpet tile throughout. A significant proportion of these spaces will have a raised access flooring system with static resistant, vinyl floor tile, factory installed at a 1:1 ratio with each tile. Wall base will consist of 4”H rubber, millwork style base. Walls will be satin or eggshell, latex painted gypsum with one accent paint within each open office space and each private office space. The ceilings will be predominantly high NRC acoustical ceiling tile with 15/16” exposed grid system. The ceiling over the raised floor area will be a combination flat finish, latex painted gypsum ceilings and large format, high NRC acoustical ceiling tiles over the raised floor area.

Computer Classrooms The computer classrooms will have static resistant, modular, carpet tile throughout the space consisting of a field and an accent tile. Wall base will be a 4”H rubber, millwork style base. Walls will be satin or eggshell, latex painted gypsum with one accent paint in each classroom to highlight the focal wall. The ceiling will be a high NRC acoustical ceiling tile with 15/16” exposed grid system.

Residential Simulator The residential simulator will have a combination of a plank style luxury vinyl tile with a minimum 20 mil urethane integral coating with chemical additive for durability and a modular, carpet tile to simulate a residential space for training. Walls will be satin or eggshell, latex painted gypsum board. Heavy-duty painted stainless-steel corner guards will be provided in this space to protect against training activities.

Ceramic tile will be installed on bathroom and kitchen walls, and the ceilings will consist of a latex painted gypsum board with soffits to simulate a residential environment.

Defense Tactics Training Classroom & Force Simulator The defense tactics classroom and force simulator room will have a rubber flooring tile that is designed to reduce impact and to provide easily interchangeable tiles in case of damage. The wall base will be 4”H rubber, rolled goods style cove base. The walls in the space will be satin or eggshell, latex painted gypsum with upholstered defense tactics 1” thick commercial grade wall pads for safety and protection of both building and occupants. Wall pads will be installed with Z-style cleats.

The ceiling will be painted high-impact gypsum board.

Multipurpose Room & Briefing Room The multipurpose & briefing rooms will have a modular, carpet tile flooring throughout consisting of a field tile and accent carpet for visual interest. The wall base in this space with be a 4”H rubber, millwork style base for an elevated appearance. Walls in this space will consist of a fabric wrapped, acoustical wall panel system up to 9’ high to provide enhanced sound reduction and reverberation control and walls above 9’ will be satin or eggshell, latex painted gypsum. The ceiling will a high NRC large format acoustical ceiling tile with 15/16” exposed grid system.

Conference Spaces Conference spaces will have modular, carpet tile consisting of an accent tile to contrast and compliment adjacent rooms and corridors. The wall base will be a 4”H rubber, millwork style base. The walls will consist of satin or eggshell painted gypsum wallboard or CMU. The ceiling will a high NRC acoustical ceiling tile with 15/16” exposed grid system.

Gym The gym will have a rubber flooring tile that is designed to reduce impact and to provide easily interchangeable tiles in case of damage.

The wall base will be 4”H rubber, rolled goods style cove base. The walls in the space will be satin or eggshell, latex painted gypsum or CMU with a wainscot height rigid vinyl sheet wall protection on gypsum walls for additional durability against equipment. Walls shared with the Basketball Court will include 9’-0”H mirrored glass. The ceiling will be exposed painted structure.

Basketball Court The basketball court will have a high impact sprung hardwood athletic flooring which enhances shock response and protects against impact injuries. The flooring will be pre-printed with basketball court boundaries and playing elements. The wall base will be 4”H vented rubber base. Walls will consist of semi-gloss latex painted CMU. Ceiling will be a combination of prefinished and field painted exposed structure. Sound absorption panels will be affixed to the exposed deck above. The court perimeter will have 1” thick commercial grade training mats affixed to the walls with Z-style cleats. Automatic blackout roller shades will be installed at clerestory windows.

Restrooms/Locker Rooms The restrooms will receive a color body, large format Porcelain floor tile that is rectified to produce a minimal grout joint for easier maintenance.

Plumbing walls and walls within 2’-0” of plumbing walls will consist of full height, color body, 2” x 4” mosaic wall tile. All other walls will receive wainscot height, color body, 2” x 4” mosaic wall tile with semi-gloss painted gypsum above. Metal edge protection and metal corner cove transitions will be provided at all floor/wall transitions, inner/outer corners, and exposed edges. A 2” x 2” porcelain mosaic will be provided at the shower floors to provide a sloped surface toward drains. Ceilings in restrooms will consist of latex painted moisture resistant gypsum board. Lavatories will consist of a solid surface countertop, backsplash, and side splashes with integral solid surface sinks and high-pressure laminate apron. Toilet compartments will consist of gypsum partitions with high performance paint and louvered doors.

Utility Spaces (Elec, Telecom, Mechanical, Fire Protection) Utility spaces will have a concrete floor with clear concrete sealer applied. A static dissipative sealer will be applied in telecom and IT spaces requiring static resistance. Wall base will be a 4”H rolled goods, cove profile base. The walls will be satin or latex painted gypsum or CMU, including plywood backers for wall mounted equipment. The ceiling will be exposed and painted.

b. Structural Interior Design – Warehouse

Vehicle Bays Vehicle bays will a concrete floor with hardener/densifier and a clear concrete sealer applied. Walls will be epoxy painted CMU block up to

14’ and prefabricated/prefinished metal panel above. Painted warehouse markings will be provided, as well as lines designated by the fire department for CPAP testing. The ceiling will be exposed painted structure.

Administrative Areas (Open Offices, Private Offices) The Administrative areas (including Logistics offices) will consist primarily of a modular style carpet tile consisting of a field tile and accent carpet to create visual interest. Wall base will consist of 4”H rubber millwork style base throughout occupied spaces to provide an upgraded aesthetic. The walls will consist of satin or eggshell finish, latex painted gypsum board or CMU. One accent paint will be selected and provided on one wall per private office and open office area. The ceiling in these spaces will be a high NRC acoustical ceiling tile with a 15/16” exposed grid system.

Support Storage Spaces Storage spaces will have a concrete floor with clear concrete sealer applied. A static dissipative sealer will be applied in spaces where combustible materials are stored. Wall base will be a 4”H rolled goods, cove profile base. Walls will be epoxy painted CMU block up to 14’ and prefabricated/prefinished metal panel above. The ceiling at Supply Storage, Fire Marshall Storage, District Lieutenant’s Storage, Property & Evidence Storage, Quartermaster Storage, and Special Ops Storage will be exposed painted structure. All other storage area ceilings will be a high NRC ceiling tile with 15/16” exposed grid system.

Restrooms The restrooms will receive a color body, large format Porcelain floor tile that is rectified to produce a minimal grout joint for easier maintenance.

Wall base will be a 4”H cut large format tile corresponding with the floor tile. Walls will be epoxy painted CMU block. Ceilings in restrooms will consist of latex painted moisture resistant gypsum board. Lavatories will be wall-mounted porcelain.

Janitor’s Closets Janitor’s Closets will have a concrete floor with clear concrete sealer applied. Wall base will be a 4”H rolled goods, cove profile base. Walls will be epoxy painted CMU block up to 14’ and prefabricated/prefinished metal panel above. The ceiling will be exposed painted structure.

Utility Spaces (Telecom, Electrical, IT) Utility spaces will have a concrete floor with clear concrete sealer applied. A static dissipative sealer will be applied in telecom and IT spaces requiring static resistance. Wall base will be a 4”H rolled goods, cove profile base. Walls will be epoxy painted CMU block up to 14’ and prefabricated/prefinished metal panel above. Plywood backers will be installed for wall mounted equipment. The ceiling will be painted exposed structure.

c. Structural Interior Design – Range

10 Lane Range The 10 Lane Range will have a concrete floor with clear concrete sealer applied. White epoxy-painted lines and numbers on the floor will indicate firing positions and distances. Sound absorbing acoustical panels will be applied full-height on all walls and on ceiling baffles to reduce reverberation. Overhead ceiling baffles will be constructed of ballistic steel to protect the structure and building systems, as well as direct errant rounds downrange. The ceiling will be a high NRC, humidity resistant, cleanable acoustical ceiling tile with 15/16” exposed grid system.

Weapons Cleaning Weapons Cleaning will have a chemical-resistant epoxy resinous flooring system with integral 4”H flash cove wall base. Walls will be semi-gloss painted gypsum. The ceiling will be a high NRC, humidity resistant, cleanable acoustical ceiling tile with 15/16” exposed grid system.

Casework will be comprised of stainless steel counters, stainless steel backsplashes, and stainless steel overhead shelves.

Storage Spaces Storage spaces will have a concrete floor with clear concrete sealer applied. Wall base will be a 4”H rolled goods, cove profile base. The walls will be satin painted gypsum with wainscot-height abuse-resistant rigid plastic sheet wall protection. The ceiling will be exposed painted structure.

Bathrooms The bathrooms will receive a color body, large format Porcelain floor tile that is rectified to produce a minimal grout joint for easier maintenance.

The walls will consist of wainscot height, color body, 2” x 4” mosaic wall tile. Metal edge protection and metal corner cove transitions will be provided at all floor/wall transitions, inner/outer corners, and exposed edges. Ceilings in restrooms will consist of latex painted moisture resistant gypsum board. Lavatories will be wall-mounted porcelain.

Decontamination The Decontamination Room will have a chemical-resistant epoxy resinous flooring system with integral 4”H flash cove wall base. The walls will consist of wainscot height, color body, 2” x 4” mosaic wall tile.

Metal edge protection and metal corner cove transitions will be provided at all floor/wall transitions, inner/outer corners, and exposed edges. Ceilings in restrooms will consist of latex painted moisture resistant gypsum board. Lavatories will be wall-mounted porcelain. The shower floor will be prefabricated solid surface with full-height solid surface walls.

Housekeeping Housekeeping will have a concrete floor with clear concrete sealer applied. Wall base will be a 4”H rolled goods, cove profile base. The walls will be semi-gloss painted gypsum with moisture and abuse-resistant rigid plastic sheet wall protection at both sides of the mop sink. The ceiling will be exposed painted structure.

Utility Spaces (Mechanical) Utility spaces will have a concrete floor with clear concrete sealer applied. Wall base will be a 4”H rolled goods, cove profile base. The walls will be satin painted gypsum. The ceiling will be exposed painted structure.

5. STRUCTURAL

A. Design Criteria

• 2018 Virginia Construction code (Part 1 of the Virginia uniform statewide building code), effective 1 July 2021.

• ASCE 7-16, Minimum design loads and associated criteria for buildings and other structures.

• AISC 360-16, Specifications for structural steel buildings, June 2018

• ACI 318 -14, Building code requirements for structural concrete.

B. Design Loads (Headquarters Building)

• Risk Category The headquarters building is classified as Risk Category IV building.

• Dead Loads Dead loads include weight of building structure and permanently installed features.

Loads may vary by building and room, and may vary from values listed here:

Level Second Floor

Component Weight (psf)

Ceiling 3

Electrical and lights 2

Mechanical and Plumbing 4

Miscellaneous 2

Total 11

Level Roof

Ceiling 3

Electrical and lights 2

Mechanical and Plumbing 4

Insulation 1

Total 12

• Live Loads

Occupancy or Use Uniform Concentrated

Offices 50 psf 2000 lb

Toilets 75 psf

Stair, corridor, exit ways 100 psf

Corridor above first floor 80 psf

Lobbies/Conference rooms 100 psf

Storage 125 psf

Electrical/Telecom room 125 psf

Mechanical room 150 psf

Roof 20 psf 300 lb

• Snow Loads –

Ground snow load 10 psf

Snow Exposure Factor, Ce 0.9

Thermal Factor, Ct 1.0

Snow Load Importance Factor, Is 1.2

Flat roof snow load, Pf 8 psf

Sloped-Roof Snow Load, Ps 8 psf

• Wind Loads –

Design wind speed, VULT 130 mph

Design wind speed, VASD 101 mph

Exposure category C

Internal Pressure Coefficients, GCpi +/- 0.18

Enclosure Classification Partially Open

• Seismic Criteria –

Mapped spectral response acceleration, short period, Ss 0.088g

Mapped spectral response acceleration, 1-sec period, S1 0.040g

Design spectral response acceleration, short period, SDS 0.094g

Design spectral response acceleration, 1-sec period, SD1 0.064g

Site Classification D

Seismic Design Category A

Analysis procedure Equivalent

Lateral Force

C. Design Loads (Warehouse Building)

The Warehouse building is classified as Risk Category IV building.

Ceiling 3

Electrical and lights 2

Mechanical and Plumbing 4

Toilets 75 psf

Corridor, exit ways 100 psf

Lobbies/Conference rooms 100 psf

Storage 125 psf

Electrical/Telecom room 125 psf

Mechanical room 150 psf

Thermal Factor, Ct 1.0

Snow Load Importance Factor, Is 1.2

Flat roof snow load, Pf 8 psf

Sloped-Roof Snow Load, Ps 8 psf

Exposure category C

Internal Pressure Coefficients, GCpi +/- 0.55

Enclosure Classification Partially Enclosed

Design spectral response acceleration, short period, SDS 0.094g

Design spectral response acceleration, 1-sec period, SD1 0.064g

Site Classification D

Seismic Design Category A

Analysis procedure Equivalent

Lateral Force

D. Design Loads (Training Building)

The Training building is classified as Risk Category II building.

Ceiling 3

Electrical and lights 2

Mechanical and Plumbing 4

Toilets 75 psf

Corridor, exit ways 100 psf

Lobbies 100 psf

Storage 150 psf

Electrical room 125 psf

Mechanical room 150 psf

Range 150 psf

Thermal Factor, Ct 1.0

Snow Load Importance Factor, Is 1.0

Flat roof snow load, Pf 7 psf

Sloped-Roof Snow Load, Ps 7 psf

Exposure category C

Internal Pressure Coefficients, GCpi +/- 0.55

Enclosure Classification Partially Enclosed

Design spectral response acceleration, short period, SDS 0.094g

Design spectral response acceleration, 1-sec period, SD1 0.064g

Site Classification D

Seismic Design Category A

Analysis procedure Equivalent

Lateral Force

E. Shallow Foundation (Headquarters and Training building)

The foundation design for the headquarters and training building is based on the Geotechnical investigation performed by ECS Mid-Atlantic. Based on Geotechnical recommendations, foundations system is consisting of shallow foundation to bear on undisturbed, firm natural soil or engineered fill and ground improvement program consisting of rigid inclusion. The top of the footing will be approximately -2’-0” below the finished floor elevation with net allowable bearing capacity of 4000 psf. Foundation undercutting to remove all the uncontrolled fill soils from beneath the footings is anticipated. This will consist of approximately 2’-0” depth of soil removal and replacement with compacted select fill or #57 stone.

F. Shallow Foundation (Warehouse Building)

The foundation design for the warehouse is based on the Geotechnical investigation performed by ECS Mid-Atlantic. Based on Geotechnical recommendations, foundations system is consisting of shallow foundation to bear on undisturbed, firm natural soil or engineered fill. The top of the footing will be approximately -2’-0” below the finished floor elevation with net allowable bearing capacity of 2500 psf. Foundation undercutting to remove all the uncontrolled fill soils from beneath the footings is anticipated. This will consist of approximately 2’-0” depth of soil removal and replacement with compacted select fill or #57 stone.

G. Ground Floor Slab-on-grade (Headquarters Building)

The ground floor slab-on-grade of the headquarters building will be designed for a minimum uniform live load of 150 pounds per square foot, which is expected to be adequate for the variety of usages housed throughout the footprint.

The planned floor slab is a 5-inch-thick concrete slab-on-grade reinforced with welded wire fabric, over a continuous vapor retarder, over 4 inches of draining sand or porous fill. The slab will be thickened to 8 inches where required in high-demand areas and rack loading such as Forensic Bays, Evidence Storage Area, and Sally Port.

H. Ground Floor Slab-on-grade (Warehouse Building)

The ground floor slab-on-grade of the warehouse will 10-inches thick to support the fire trucks and vehicular load reinforced with top and bottom rebar over a continuous vapor retarder, over 4 inches of draining sand…