2-25-8-21 WCJ MMH Design Narrative.pdf

WEBER COUNTY JAIL MEDICAL & MENTAL HEALTH HOUSING

PRELIMINARY DESIGN NARRATIVE

Table of Contents:

1.0 Brief

1.1 Vision

1.2 Planning & Concept

1.3 Envelope & Exterior Materiality

1.4 Volume & Massing

2.0 Medical Clinic

2.1 Clinic

2.2 Medical Infirmary

2.3 Support & Storage

2.4 Medical Staff

3.0 Housing Section

3.1 Male Housing

3.2 Female Housing

4.0 Detention Walls, Doors, Ceiling and Windows

5.0 Interior

6.0 Future Phase

1.0 Brief:

The Weber County Jail Medical and Mental Health Housing project is a 45,500-square-foot addition to the existing Sheriff’s Office and jail facility, located on the southeast side of the complex. The program is organized into two primary components: a single-story medical clinic and infirmary, and a two-story mental health housing section. The clinic consolidates medical exam spaces, infirmary beds, and staff areas into a centralized care hub, with an adjacent holding area to support secure transfers.

The housing section is designed with separate accommodations for male and female residents, each with its own dedicated recreational yard, interior dayroom, and support spaces. The addition connects to the existing facility through a main corridor, which acts as a spine separating the medical zone on the west from the housing units on the east, ensuring clarity of circulation and security while maintaining operational efficiency.

1.1 Vision:

The design of the Weber County Jail Medical and Mental Health Housing project is guided by principles that balance safety, care, and long-term stewardship. At its core, the facility is planned to maintain the safety and security of officers, staff, and inmates, while also fostering environments that support improved inmate outcomes through access to medical and mental health services. The building is conceived as a durable and adaptable structure with a serviceable life of at least fifty years, ensuring that Weber County’s investment will remain functional for generations. Sustainability strategies are incorporated where practical and impactful, aligning responsible resource use with operational needs. The design also responds to the budgetary framework established for the project, prioritizing efficiency without compromising quality. Finally, the facility masterplan ensures that future phases are fully integrated with the current design, supporting long-term growth while maintaining seamless functionality.

1.2 Planning & Concept:

The addition is organized with a clear separation between the medical functions to the west and the housing units to the east, linked by a central corridor that serves as the facility’s primary circulation spine. A secondary perpendicular corridor provides additional access between the medical staff areas and the housing sections. At the intersection of these two corridors, a projected control room anchors the plan, ensuring secure monitoring of movement between the existing pods and the new addition.

The corridor system is not only designed for present functionality but also strategically aligned with future phases, including the planned housing pods, booking areas, and a dedicated staff entry. This forward-looking organization ensures that future expansions can be integrated seamlessly while maintaining clarity, security, and efficiency in circulation.

1.3 Envelope & Exterior Materiality:

The exterior envelope of the facility is conceived with a focus on durability, security, and long-term performance, while remaining adaptable to budget and constructability considerations. At this preliminary stage, the design intent is to remain open and flexible, allowing collaboration with the Construction

Manager (CM) during upcoming design phases to identify the most effective solutions.

The primary structure is being explored through several potential systems, including concrete masonry walls, tilt-up concrete panels, or steel framing, each offering unique benefits in terms of cost, speed of construction, and long-term maintenance. The final selection will be determined in coordination with the CM to best align with the project’s budget, operational needs, and serviceable life expectations. The design team’s approach ensures that the exterior envelope will provide a cohesive, secure, and resilient presence, while balancing practicality with architectural integrity.

1.4 Volume & Massing

The overall massing of the addition reflects its dual program: a two-story housing wing paired with a single-story medical and infirmary wing. This deliberate variation in height provides a clear architectural distinction between care-focused and housing-focused functions, while maintaining a cohesive relationship with the existing jail complex. The housing section’s vertical presence communicates its importance within the facility, while the lower medical wing offers a more approachable scale for staff and service entry.

Together, these volumes establish a balanced and orderly composition, reinforcing clarity of function and supporting efficient circulation between new and existing spaces.

2.0 Medical Clinic

The medical clinic is designed as a comprehensive care hub, consolidating exam, treatment, and support functions. A central vestibule links the clinic with the infirmary and medical staff areas, simplifying circulation and ensuring efficient movement between spaces.

2.1 Clinic

The clinic includes six exam rooms, a dental operatory, trauma treatment room, dialysis space, and a dedicated phlebotomy/vitals alcove. Two behavioral health rooms reinforce the project’s emphasis on mental health care. A pharmacy, accessed directly from the main corridor, provides a secure service window into the clinic, and a urinalysis (UA) collection room is provided to support specimen collection in a controlled manner.

A secure holding cell area is located adjacent to the clinic and serves as the first point of arrival for inmates requiring medical attention. This area is supervised by a dedicated officer and includes separate male and female group holding cells, each with its own toilet, supporting both security and

Prison Rape Elimination Act (PREA) concerns.

The exam rooms are arranged around a centrally located nurse station, designed with dual-access circulation: staff enter from one side, while inmates enter from the opposite side through a controlled sequence that includes privacy curtains. This configuration balances safety and dignity while supporting efficient clinical workflow. The nurse station is oriented to provide direct sightlines into adjacent rooms, reinforcing observation, staff security, and operational control.

2.2 Medical Infirmary

The infirmary is designed as a dedicated care environment for inmates requiring extended medical supervision. The layout provides separate accommodations for women and men, ensuring privacy while maintaining efficient staff coverage. A centrally located nurse/officer station is positioned with direct access to both men’s and women’s areas, supporting visibility, response time, and operational control.

The women’s infirmary section, accessed directly from the clinic, includes three single medical rooms and one two-bed room, providing flexibility for varying levels of care. Beyond this area, the men’s infirmary section offers four single medical rooms and two two-bed rooms. To maintain privacy, all glazing along the women’s section will have a means of temporarily obscuring vision, ensuring that movement of male inmates through this area is not visible to female patients. This approach preserves separation while supporting secure and efficient circulation.

Each infirmary cell is equipped with detention-grade plumbing fixtures and designed to provide natural light through windows, supporting both safety and patient well-being. The only exception is a single men’s room, which is internal and does not receive direct daylight.

Both men’s and women’s sections include dedicated showers, and a large shared shower for staff-assisted showers is provided with controlled access from both sides. In addition, an exterior door at the north side of the infirmary provides secure access to outdoor recreation yards located between the existing facility and the new addition.

The infirmary is further supported by adjacent staff and storage spaces, ensuring that medical personnel can deliver care in a secure, functional, and humane environment consistent with the broader mission of the facility.

2.3 Support & Storage

A series of clean storage, dirty storage, and biohazard rooms are strategically located along the main corridor, with controlled access to both the clinic and infirmary. This arrangement ensures that medical staff can efficiently manage supplies and waste streams, while maintaining strict separation between sterile and contaminated materials.

The corridor-facing layout also allows for supervised inmate work programs, enabling inmates to assist with cleaning and support tasks without entering treatment areas. This dual-access strategy reinforces operational efficiency while supporting the facility’s rehabilitative goals.

2.4 Medical Staff

The medical staff area is located at the southwest corner of the addition, positioned to maximize natural light and views for staff wellness and productivity. This space is directly accessible from the main corridor and connects seamlessly to both the clinic and infirmary through the central vestibule, ensuring efficient staff circulation.

The program includes six workstations for nurses and six workstations for providers, supported by offices for the Director of Nursing and the Health

Services Administrator, along with space for two administrative assistants.

Shared support spaces include a copy/work room and dedicated staff toilets, enabling functionality without disrupting clinical workflow.

The layout reinforces the project’s guiding principle of balancing staff efficiency, safety, and well-being, providing a professional environment where medical personnel can effectively coordinate care across the clinic and infirmary.

3.0 Housing Section

The housing section is designed with the primary intent of maximizing staff sightlines and ensuring security, while also providing functional and humane living environments.

3.1 Male Housing Section

The men’s housing unit, located at the north side of the corridor and accessed through a secure vestibule, includes 16 single-bed cells on the first level and 16 double-bed cells on the second tier. Two ADA-compliant cells are provided on the first level. Each tier is equipped with two showers, located at the ends of the cell rows for convenience and supervision. A double-height dayroom on the first floor forms the social center of the unit, while two stairways at either end provide direct access to the second tier. The cells are designed in a single standard size to promote constructability, efficiency, and operational consistency. Observation is supported by indirect officer stations located centrally on each floor, ensuring full visual control of the housing environment.

Additional program spaces include storage/janitor rooms and group treatment rooms, further supporting daily operations. Two outdoor recreation yards, accessed directly from the dayroom and positioned on either side of the vestibule, provide secure outdoor activity space. These recreation yards are designed with windows overlooking the corridor, reinforcing staff supervision.

3.2 Female Housing Section

The women’s housing unit, located at the south side of the corridor, includes eight single-bed cells on the first floor and eight on the second tier, with one

ADA-compliant cell provided on the first floor. Similar to the men’s unit, the women’s housing includes dedicated showers, a main dayroom, and sub-dayroom areas to support flexibility in programming and social interaction.

Support spaces such as janitor closets, storage, and group treatment rooms are also integrated.

To accommodate future growth, the women’s housing unit has been planned for expansion to ultimately match the capacity of the men’s unit. The west wall of the women’s housing section is therefore designed and detailed to allow for future demolition and seamless extension of the cell block. This approach ensures that the current construction remains secure and fully functional, while providing a clear and cost-effective path for expansion in the next phase.

Both men’s and women’s housing areas are supported by continuous chases, ensuring efficient maintenance and secure access to utilities without disruption to inmate spaces.

4.0 Detention Walls, Doors, Ceiling and Windows

All exterior walls, primary corridor walls, medical cells, and holding cells will be constructed as detention-grade assemblies. Depending on coordination with the Construction Manager (CM), these assemblies may be constructed using truss walls, concrete masonry units (CMU), or concrete precast panels.

In the housing section, cells are designed to stack directly over one another, allowing for efficient construction using precast panels, CMU secure walls, or truss wall systems. This approach promotes both constructability and long-term durability.

Sliding detention doors are provided throughout the housing units to streamline operations. In the medical areas, sliding doors are located along the inmate path of travel, from the existing facility, through holding cells and the clinic, into the infirmary, facilitating secure and efficient transitions. All housing section doors are sliding type for consistency and staff control. In the infirmary, doors to medical rooms are designed with sufficient width to allow beds to pass through easily, supporting flexibility and patient care.

Interior clinic partitions are primarily constructed of high-impact gypsum board for durability, while the wall between the medical staff area and the infirmary is built as a detention-rated assembly to maintain security.

Glazing is carefully differentiated by function: medical staff offices are provided with standard commercial windows to maximize natural light, while inmate-facing areas are secured with detention-grade glazing or opaque treatments where privacy and security are required. All

Ceilings at medical beds in the infirmary and holding cells, and housing cells are detention grade.

5.0 Interior Finishes

Interior finishes are selected to balance durability, hygiene, and operational needs. In the clinic and infirmary areas, all flooring and base materials will be hospital-grade finishes, supporting infection control and ease of maintenance.

Ceilings will be a combination of acoustic ceiling tiles and gypsum board, specified according to the functional requirements of each space.

In the medical staff and administrative areas, finishes will be more consistent with commercial standards, including resilient flooring, ceiling systems, paint, and base, tailored to the needs of office and support spaces. This differentiation ensures that clinical areas meet healthcare standards while staff spaces remain efficient and professional.

6.0 Future Phase

The design has been carefully planned to integrate future phases without disruption to current operations. Planned expansions include:

• R&O pods at the southwest side of the facility, connected to the current corridor terminus.

• An additional housing pod at the northeast, extending from the opposite end of the corridor within the housing section.

• Expansion of the women’s housing unit, with the west wall designed for removal so the unit can be doubled to match the men’s housing capacity.

• A new booking area with a sally port connected to the road planned in the current phase. Road modifications are anticipated to accommodate this addition.

• A dedicated staff entry, located between the new addition and the existing building, with access from the northwest side of the site.

• Adjustments to existing parking lots to accommodate the new staff entry and future program requirements.

This forward-looking strategy ensures that the current design not only meets present needs but also provides a clear framework for long-term growth, maintaining operational efficiency and continuity as the facility expands.

June 23, 2025

Weber County Jail - Site Study

MENTAL HEALTH HOUSING

SITE

The expansion is proposed to be built southeast of the existing facility with a connecting corridor. Site impacts would include:

1) Relocation of the existing fence.

2) Relocation of the paved loop road.

3) Relocation and addition of site lighting.

4) Removal of existing landscaping including a grove of tree

5) Planning area loop road to accommodate future expansion.

GRADING

The site slopes away from the existing building to the southeast. There is an existing storm water collection area that is approximately 5’ below the existing floor elevation. Beyond the collection area, the site rises approximately 6’ to 8’. The proposed location of the new housing will require the collection area be filled in. Fills will be in the 2’ to 5’ range. The site to the southeast of the expansion will need to be cut down between 1’ and 6’.

Drainage around the southeast will need to accommodate the existing water from the east side of the site The area for the future pods may create some grading challenges as the grade rises in that area and the loop road may be higher than the finish floor of the additions.

UTILITIES

STORM WATER –

The is an existing catch basin, storm drain line and roof drain that will need to be removed. The existing roof drain will need to re-routed. The existing storm water collection area will need to be relocated. The volume from that area will need to be provided somewhere else on site. The storm water study for the addition will need to be brought up to meet the low impact development requirements (LID) that are now required by Ogden City. The storm drain around the site has been constructed at minimal slope and there appears to be standing water at times. Below grade retention/detention may be required to address the both the standing water and LID requirements.

SANITARY SEWER –

There are existing 8” Sanitary sewer lines on each side of the proposed expansion located near the existing pods. The sewer lines will not be impacted by the proposed building. The inverts are approximately 6.5’ below existing grade.

DOMESTIC WATER/FIRE –

There is an existing 8” fire line that loops the existing building. The fire line will need to re-routed around the addition and one to three new hydrants constructed. If an additional fire riser is required for the addition, it can be attached to the 8” loop. I will require a PIV and a detector check valve.

There is an existing 6” metered line to the west of the proposed expansion.

If possible, the new addition should connect into this service to avoid an additional meter.

GAS AND ELECTRICAL –

Gas – There is a gas line on the east side of the proposed expansion area shown on the topographic survey provided by Weber Count. It may be impacted by the expansion and will for sure be impacted by the future Pod on the east side.

Electrical – There are 2 light poles shown on the survey that will need to be removed.

Weber County Jail Medical & Mental Health Housing

SCHEMATIC STRUCTURAL DESIGN NARRATIVE

The Weber County Jai l Medical & Mental Health Housing project wil l be an approximately 40,000 square foot addit ion to the existing Weber County Sheriff ’s Complex, which was constructed in 2000. The project wil l consist of medical space, mental health space, and male and female housing space. The housing space is expected to consist of a 2-story f loor plan, while the other spaces wi l l consist of a single-story f loor plan.

Appl icable Codes and Standards

The addition wil l be designed to comply with whichever version of the International Bui lding Code is adopted by the State of Utah at the time of the design. Currently , the 2021 International Bui ld ing Code is adopted by the State of Utah. Referenced structural standards within this version of the IBC include, but are not l imited to:

• ASCE 7-16

• AISC 341-16

• AISC 360-16

• ACI 318-14

Genera l Des ign Cr iter ia for New Elements (based upon the 2021 IBC):

• Risk Category IV

• Geographic Coordinates:

o 41.240 North, -111 .990 West

• Dead Loads:

o Equipment weights as required o New dead loads related to envelope, roofing, structure, f looring, etc.

• Snow Load:

o Site elevation = 4,300 feet above sea level o Pg = 37 psf with special consideration for dri ft ing snow where applicable.

o I s = 1 .2 o P f = 31 psf

• Wind:

o Vu l t = 1 13 mph (3-sec. gust) o Va s d = 88 mph o Exposure C

• Seismic: (These values wil l be veri f ied via a new geotechnical investigation) o Short Period Spectral Acceleration, Ss = 1 .355 o Long Period Spectra l Acceleration, S 1 = 0.492 o Site Class = D (based on the geotechnical study completed in

2020) o Short-Period Site Coefficient , Fa = 1 .2 o Long-Period Site Coefficient , Fv = N/A o Design Spectral Response at Short-Periods, SDS = 1 .084 o Design Spectral Response at Long-Periods, SD 1 = N/A o Ie = 1 .50

• Soi ls :

o A geotechnical study was completed in 2020, which references the

2018 IBC. The report is avai lable for review but should be updated for the current code. Values obtained from the previous report include:

Allowable net bearing pressure = 1 ,500 psf Frost depth = 30-inches

• Blast/Anti-Terrorism:

o None expected.

Bas ic St ructura l Des ign Scope

The structural system wil l be determined once the Construction Manager is on board and cost-effective approaches are investigated and decided upon. I t is expected that the system wil l be composed of concrete t i lt-up construction, reinforced and sol idly grouted concrete masonry units, or a combination of the two systems.

The 2-story housing portion of the bui lding may consist of precast concrete, metal panel construction or reinforced, sol id-grouted CMU. The final decision wil l be made with the help of the construction manager on the basis of cost and security . Precast concrete units wi l l be consistent with the existing Sheriff ’s Complex and if chosen, their design wil l be completed through deferred submittals and delegated design process.

The roof structure is expected to consist of structural steel , premanufactured joists and girders and metal deck.

The systems described above wil l comprise both the gravity and lateral load-resisting system. Al l of them can effectively serve as load bearing elements, shear wal ls, and diaphragms.

The foundation system wil l be designed and constructed based upon the updated geotechnical report and is expected to consist of conventional spread and/or continuous wall foundations placed on suitable, undisturbed natural soi ls and/or on structural f i l l extending to suitable natural soi ls.

Recommendations are provided in the geotechnical report regarding the use of structural f i l l .

De legated Des igns/Deferred Submit ta ls

Delegated designs and deferred submittals consist of structural and non-structural systems that are cri t ical parts of the overal l bui lding but that are not included in the original design scope, and that inherently offer value to the owner in having the designs for these systems provided by the contractor or the item manufacturer. For example, premanufactured roof joists and girders, steel sta irs, and deep foundations are common structural-related deferred submittals where the design team provides the performance specif ication, and the manufacturer provides a cost-effective solution that meets the specif icat ion. Structural delegated designs are accompanied by professional engineering calculations and drawings that the design team reviews for general conformance with the overal l design.

Weber County Jail Medical and Mental Health Housing

Mechanical Basis of Design - Schematic

6/25/2025

General

Project Description

The Weber County Jail Medical & Mental Health Housing project is a purpose-built facility designed to provide healthcare services within a correctional environment. The facility has a medical clinic, infirmary, and housing for inmates requiring specialized mental health services. Specialized treatment areas—including trauma, dialysis, dental, and phlebotomy rooms—support a range of medical needs.

The medical wing includes adjacent support spaces for staff and sanitation. The design also anticipates future growth, with designated areas for expanded booking, housing, and staff entry.

Space Allocation (sf)

Infirmary 4,600

Medical / Dental / Mental Health 4,800

Intake / Holding 1,100

Administrative 2,100

Housing (Mental Health) 20,400

Occupancy

Occupancy: I-3 Risk Category: IV Delivery method is Design/Bid/Build

Applicable Codes and Standards

Will comply with the latest edition of the following codes and standards, or the requirements defined in this program, whichever is more restrictive:

2021 IBC

2021 IMC

2021 IPC

2021 IFC

2021 IFGC

2021 IECC

ANSI/ASHRAE Standard 52.2-2017: Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size ANSI/ASHRAE Standard 55-2023: Thermal Environmental Conditions for Human Occupancy ANSI/ASHRAE Standard 62.1-2022: Ventilation for Acceptable Indoor Air Quality ANSI/ASHRAE Standard 90.1-2022: Energy Standard for Building except Low-Rise Residential Buildings ANSI/ASHRAE Standard 129-1997: Measuring Air-Change Effectiveness AHRI Standard 510 - Forced-Circulation Air-Cooling and Air-Heating Coils

AHRI Standard 550/590 - Performance Rating of Water-chilling and Heat Pump Water-heating Packages Using the Vapor Compression Cycle AMCA Standard 511-10 - Certified Ratings Program, Product Rating Manual for Air Control Devices

Building Energy Performance

2021 IECC will be the basis for energy code compliance

Utilities

Culinary Water

The existing domestic cold-water system includes a 6” meter and a six-inch water service entrance. The existing estimated peak flow demand is 600 gpm. Peak water demand for the addition is approximately 175 gpm. The combined peak flow rate is estimated at 640 gpm. The water utility reports that site pressure is 95-100 psi. At this available pressure and peak flow rate, the existing water service is adequate to accommodate the new addition. The water service will be near capacity.

Source WSFU Supply Peak

(GPM)

Supply Pipe Size (in)

Supply Pipe Velocity (fps)

Existing Building

4300 550 6 6.5

New Addition

700 175 4 4.3

Combined 5000 640 6 7.1

Reference 2021 IPC, Appendix E

Sanitary Sewer

The existing estimated peak flow is approximately 2,200 DFU. Peak sewer flow will increase by approximately 350 DFU. Two existing sanitary sewer lines are located near the addition and have a capacity of 1600 DFU each. These two lines travel north and combine into an existing 12” line with a design slope of 1%.

Source DFU Min. Required Pipe Size (in) (2)

Existing Building 2000 10 (1)

New Addition 400 6

Combined 2400 10 (1)

Note 1: Building is served by two 8” pipes running on the E and W sides of the building. These combine into a 12” main that flows to an existing lift station.

Note 2: 1/8” / foot slope.

Reference 2021 IPC, section 709

Natural Gas

The existing natural gas system includes a meter that delivers 15,000 mbh at 5 psig. Natural gas piping will be extended to the addition.

Gas Service Provider ................................................. Enbridge

Heat Content of Gas ................................................ 890 btu/cf

Estimated Load .......................................................... 2500 cfh

Service Pressure .............................................................. 5 psi

Storm Drainage

Storm drain shall be new connections to the site stormwater management system.

Design Requirements

Seismic

Site Class D

Seismic Importance Factor (Ie) = 1.5

Seismic Design Category D

Seismic Spectral Accelerations

SS 1.54g

S1 0.55g

Design Spectral Accelerations

Sds 1.08

Sd1 0.76

Site Elevation

4,300’ ASL

Outdoor Design Conditions

ASHRAE Fundamentals Handbook, 2021 Edition.

Design conditions for Salt Lake City: winter ............................................................... 9.4 deg F

(ASHRAE 99%/1%) summer ................................................. 94.3/60.8 deg F

10 year extreme minimum - 4.7 deg F

Indoor Design Conditions

Space Type

Temperature (+/- 2oF) Noise

Summer Winter RC Mark II RC(N) Occ1 Unocc Occ1 Unocc

Open Public Areas 75 / 78 80 72 / 69 65 35 - 40

Private Offices 75 / 78 80 72 / 69 65 30 - 35

Space Type

Temperature (+/- 2oF) Noise

Summer Winter RC Mark II RC(N) Occ1 Unocc Occ1 Unocc

Open Offices 75 / 78 80 72 / 69 65 35 - 40

Break Rooms 72 / 75 80 72 / 69 65 35 - 40

Patrol Rooms 75 / 78 80 72 / 69 65 35 - 40

Briefing Room 70 / 70 70 72 / 72 65 30 - 35

Conference Rooms/Collaboration Rooms

70 / 78 80 72 / 69 65 25 - 30

Classrooms 75 / 78 80 72 / 69 65 30 - 35

Cells/Holding/Transport 75 / 78 80 72 / 69 65 35 - 40

Bedroom 75 / 78 n/a 72 / 69 n/a 35 - 40

Day Room 75 / 78 80 72 / 69 65 35 - 40

Pharmacy 75 / 78 80 72 / 69 65 35 - 40

Medical/Exam Rooms/Dental

75 / 78 80 72 / 69 65 35 - 40

Toilet Rooms 75 / 75 80 72 / 69 65 n/a

Storage/Utility Rooms 80 80 60 55 n/a

Corridors 75 78 68 65 n/a

Copy Rooms 75 / 78 80 72 / 69 65 n/a

Laundry Storage Room 80 80 68 65 n/a

Mechanical Rooms Ventilate only 65 65 n/a

Electrical Room 80 80 55 55 n/a

Data MDF/IDF Room 70 70 70 70 n/a

1. Second number is setpoint when occupancy sensor detects that zone is vacant during occupied period.

Humidity Control

No humidity control is provided in any location

Ventilation/Indoor Air Quality

Ventilation of all spaces will comply with the minimum requirements of ASHRAE Standard 62.1-2022, Ventilation for Acceptable Indoor Air Quality.

Room

ASHRAE 62.1-2019,

Table 6-1 Category Pers/sf

Rp

(cfm/pers)

Ra

(cfm/sf)

Total OA

(cfm/sf)1

DCV

Open Public Areas Office: Main Lobbies 0.015 5 0.06 0.140 no

Room

ASHRAE 62.1-2019,

Table 6-1 Category Pers/sf

Rp

(cfm/pers)

Ra

(cfm/sf)

Total OA

(cfm/sf)1

DCV

Private Offices Office: Office Space 0.010 5 0.06 0.110 no

Open Offices Office: Office Space 0.010 5 0.06 0.110 no

Break Rooms Office: Breakrooms 0.050 5 0.12 0.370 no

Patrol Rooms General: Conference/Meeting 0.050 5 0.06 0.310 yes2

Briefing Room General: Conference/Meeting 0.050 5 0.06 0.310 yes2

Conference Room/ Collaboration Rooms

General: Conference/Meeting 0.050 5 0.06 0.310 yes2

Cells/ Holding/ Bedrooms Correctional Facilities: Cell 0.030 5 0.12 0.270 no

Day Room IMC 2021, Correctional facilities: Day room

0.030 5 0.06 0.210 yes2

Pharmacy Miscellaneous: Pharmacy (prep. Area)

0.010 5 0.18 0.230 no

Medical/Exam Rooms

Outpatient Health Care Facilities: General examination room

0.020 7.5 0.12 0.270 no

Dental operatory Outpatient Health Care Facilities: Dental Operatory

0.020 10 0.18 0.380 no

Storage/Utility Rooms

Office: Dry Storage 0.002 5 0.06 0.070 no

Corridors General: Corridors n/a n/a 0.06 0.060 no

Laundry Room Hotels, Motels, Resorts, Dormitories: Laundry rooms, central

0.010 5 0.12 0.170 no

MDF/IDF Room Miscellaneous: Computer 0.004 5 0.06 0.080 no

1 Minimum value. May be higher based on air change rate requirements

2 DCV only for zones ≥ 500 sf, per requirements of ASHRAE 62.1-2019, Section 6.4.3.8

Outdoor air intake flow and/or space or zone airflow will be reset as operating conditions change, in accordance with Section 6.2.7 of the standard, for the zones noted as DCV in the space summaries.

The ventilation system will be designed for an air change effectiveness greater than or equal to 0.9 as determined by ASHRAE 129-1997, following the recommended design approaches in ASHRAE 2017 Fundamentals, Chapter 20.

There will be an IAQ Construction Management Plan that includes the use of high efficiency filters (Minimum Efficiency Reporting Value (MERV) = 13, as determined by ASHRAE 52.2-1999), at each return air grille for systems used during construction.

Exhaust

Space Exhaust Rate Criteria Control

Toilet Rooms, Showers 70 cfm/fixture public, 50 cfm/fixture private Continuous when occupied

Break Room 0.5 cfm/sf Switched

Copy Rooms, Interview rooms (over suspect side of table)

0.5 cfm/sf Continuous

Report Taking 100% - no recirculation continuous

Housing 15 ACH emergency smoke control BAS

Janitor’s Closet

1.0 cfm/sf, or larger as required to maintain at negative pressure of 0.03” w.c.

relative to adjoining spaces

Continuous

Laundry Room Per manufacturers requirements On with equipment

Dirty/Waste/Bio 1.0 cfm/sf Continuous

Holding Cells 1.0 cfm/sf Continuous when occupied

Mechanical Room 0.5 cfm/sf Continuous

Redundancy Boilers – 100% Hot water reheat pumps – 100% Domestic hot water – 50% Rooftop units - None

Emergency Power All HVAC Systems All Domestic Water Systems

Commissioning

Commissioning plan will be developed and implemented by separately contracted third party.

Measurement and Verification

Energy meters provide local as well as remote readouts, using BACnet protocol

Continuous metering equipment for the following uses (as applicable):

System Meter

Heating Water

Cooling Water

Magnetic in-line flow meter similar to Onicon F-3100, with Onicon System 10 Btu meter providing the following information: fluid flow rate, supply and return temperature, instantaneous energy flow rate, totalized energy flow rate

Operations and Maintenance

HVAC maintenance will be performed by Weber County Corrections staff.

40 hours of training will be specified as part of the Test and Balance specification.

Life Safety

Smoke Management

Fire/smoke dampers in conformance with Chapter 7 of IBC 2021.

Smoke compartments per IBC 408. HVAC system will support smoke compartments consistent with code.

Load Calculations

Envelope

Component Performance

Metal Frame Walls R-13 + 7.5ci

Below Grade Walls R-7.5ci

Roof R-30ci

Window to wall ratio 15%

Fenestration Assembly U-factor 0.36

Fenestration SHGC 0.380

Internal Loads

Room Type

ASHRAE 90.1-2019,

Table 9.6.1 Category

People (Pers/sf)

OH Lights1 (W/sf)

Equip2 (W/sf)

Open Public Areas Lobby 0.015 0.84 0.50

Private Offices Office, Enclosed < 250 sf 0.010 0.74 1.25

Open Offices Office, Open Plan 0.010 0.61 1.00

Break Rooms Lounge/breakroom 0.050 0.59 1.50

Classroom Classroom/Lecture Hall/Training 0.065 0.89 0.75

Conference Room/ Collaboration Room/ Patrol Room/ Briefing Room

Conference/meeting/multipurpose 0.050 0.97 1.50

Cells/ Holding/ Transportation

Correctional Facilities: Cell 0.030 0.69 0.25

Medical/Exam Rooms

Outpatient Health Care Facilities:

General examination room

0.020 1.40 1.00

Toilet Rooms Restroom 0.000 0.63 0.25

Room Type

ASHRAE 90.1-2019,

Table 9.6.1 Category

People (Pers/sf)

OH Lights1 (W/sf)

Equip2 (W/sf)

Shower/ Locker room

Locker Room 0.050 0.52 0.10

Storage Storage, ≥ 50 sf 0.002 0.38 0.00

Corridors Corridors 0.000 0.41 0.25

Interview Rooms Conference/Meeting/multipurpose 0.020 1.07 1.50

Pharmacy area Miscellaneous: Pharmacy 0.010 1.66 1.50

Laundry Laundry/washing area 0.010 1.09

Copy Rooms Copy/print 0.000 0.31 1.50

Lobby/ Entrances Lobby, All other 0.010 0.84 0.10

Mechanical Room Electrical/mechanical rooms 0.000 0.43 0.00

Electrical Room Electrical/mechanical rooms 0.000 0.43 1.50

MDF/IDF Room Electrical/mechanical rooms 0.000 0.43 1.50

1. IECC 2021 Table C405.3.2(2) values.

2. Estimates.

Safety factors in HVAC load calculations:

• Cooling – 10%

• Heating – 15%

Hours of Operation

Housing

Day of

Week Occupied Unoccupied

M - F 0000-2400 n/a

Sat - Sun 0000-2400 n/a

Holiday 0000-2400 n/a

Infirmary, Medical, and Office

Day of Week Occupied Unoccupied

M-F 0600 – 1800 0000 – 0600

1800 - 2400

Sat - Sun n/a 0000 – 2400

Holiday n/a 0000-2400

Occupancy Schedules

Zone Infirmary, Medical, and Office Day Weekday Peak Occupancy Varies o f M a x im u m

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Hour

Room Requirements/Strategies

Room Requirements/Strategies

Administrative Spaces and other spaces as necessary

Variable volume rooftop units with hot water reheat. Maximum of three private offices per control zone, 2,000 sf of interior maximum per control zone

Conference rooms, meeting rooms and other single-purpose rooms will be on separate control zone.

Infirmary, Medical and Holding

Single zone rooftop units. Maximum 5 offices per zone. Maximum of 2,000 sf per zone.

Housing Areas

Single zone rooftop units. Maximum of 2,000 sf per zone, except for day rooms.

Restroom

Exhaust fans controlled with time clock for scheduled occupied/unoccupied hours, and occupancy sensors for after hours and weekend operation.

Holding Cells

Separate round drops to each unit from common plenum at RTU discharge.

Security grilles, similar to Kreuger 1310 series

Showers

Showers are not directly conditioned but are indirectly conditioned by transfer air.

Copy/Print

Exhaust per IMC.

IT Room

Independent DX cooling unit. Single unit, no redundancy No piping to be routed over IT/MDF/IDF room.

Main Electrical Room with Transformer(s)

Exhaust fan for ventilation, no redundancy No piping to be routed over Electrical room.

Systems and Equipment

Air Handling

Where a large enough zone is available, single zone rooftop units will be utilized. In some areas, especially administrative areas, multizone RTUs with reheat will be use. RTUs will not cross smoke compartments.

Single Zone Rooftop Units

Roof mounted exterior Constant or variable volume as allowed by energy code.

Modulating, indirect fired gas heat Dx cooling

2” double wall construction with integral base frame Ultra Low-Leak, insulated dampers (Class 1A) MERV 8 pre-filter, MERV 13 final filter

Multizone Rooftop Units

Roof mounted exterior Variable volume Modulating, indirect fired gas heat Dx cooling

2” double wall construction with integral base frame Ultra Low-Leak, insulated dampers (Class 1A) MERV 8 pre-filter, MERV 13 final filter Terminal units with reheat for zone control.

Smoke Control

Smoke Control for the I-3 occupancy areas will be in conformance with the requirements of IBC section 408.

Zoning will minimize duct crossing of smoke barriers. Fire and smoke dampers at all penetrations of smoke compartment. The HVAC system will maintain positive pressure within smoke compartments.

Heating

The primary heating source will be gas fired indirect burners in rooftop units.

Building heat load = 50 btu/sf

Where terminal zones use reheat, the heating water source is the existing heating water plant.

Heating water temperature reset to follow existing reset schedule.

A new variable volume secondary loop provides heating water distribution.

Pump speed varies to maintain heating water loop differential pressure setpoint.

Differential pressure setpoint resets on outside air temperature.

Pump operates to circulate heating water from boiler plant to reheat coils at terminal devices.

Controls

A new system will be provided for the addition. This system will be integrated into the building automation system.

There will be a written sequence of operation provided on drawings for all systems controlled by the Building Automation System (BAS).

Areas served by air handlers and other fan systems will be labeled on the BAS graphics.

There are temperature sensors on the airside outlet of all air handlers and terminal units.

All controls can monitor, control, and adjust all set points and control points.

The supervisory controllers communicate with BAS and individual PLC.

Individual room temperature sensors include push button temporary override to occupied mode for a set period time.

BAS and PLC are native BACnet.

All meters are integrated into the BAS. Heating water, domestic cold water, and airflow where applicable.

There is no central lighting control.

Ductwork

Supply, return and exhaust duct is galvanized steel, minimum 22 gauge or better, as required by pressure classification.

All duct will be constructed and leak tested to achieve a leak rate less than 10 cfm/100 ft2, based on CL = 6 and P = 2”

Duct velocity will be 2,500 fpm, maximum in vertical shafts, and 1,500 – 2,000 fpm in horizontal runs.

Turning vanes in all medium pressure supply duct upstream of VAV boxes for mitered elbows where insufficient space is available for long radius elbows.

Dampers

Motorized two-position, opposed blade isolation dampers at roof exhaust fans and relief penetrations.

Low leak rate dampers: Class 1A leakage rating (3 cfm/sf @ 1" w.c.)

Terminal Devices

Single-duct pressure independent VAV with factory installed direct digital controls

Unit casing: minimum 22 gauge galvanized steel, leakage tested to not exceed 1.0 percent of the maximum rated airflow at 1.0 inches of water gauge, and 2.0 percent of the maximum rated airflow at 3.0 inches of water gauge.

Fiberglass Liner: 1 inch thick, R-value of 4.1, in compliance with the requirements of UL 181 (erosion), ASTM C1338 (fungi resistance), ASHRAE 62.1, and ASTM C1071, having a maximum flame/smoke spread of 25/50.

Airflow sensor: differential pressure airflow device measuring total and static pressures, with accuracy plus or minus five percent throughout operating range.

Hot Water Heating Coil: 2 row (minimum) coil, ½ inch, 0.016 thickness, certified in accordance with AHRI 410, with 0.0045 inch aluminum fins, leak tested to a minimum 390 psi.

Grilles/Registers/Diffusers

Painted steel linear slot, plaque face, spiral as appropriate

Perforated face return grilles

Water Treatment

Closed Systems: Pot feeder at snowmelt and heat recovery pumps for water treatment chemicals (snowmelt and heat recovery systems)

Hydronic Piping

Schedule 40 black steel. Welded or grooved coupling (similar to Victaulic) for 2” IPS or greater, threaded smaller.

Press fit is acceptable

Hydronic Specialties

Air Separator................coalescing air and dirt separator in closed loop

Strainers ......................low pressure drop Y-strainer at pumps, air handler coils, heat exchangers and source equipment (Cv ≥ 60)

Standard Y-strainer at all terminal unit control valves

Expansion Tank ...........Bladder type for tank volume greater than 20 gallons

Diaphragm type acceptable for smaller tanks

Heat Exchangers .........Gasketed plate and frame heat exchanger.

Brazed plate at snowmelt and make-up air handler preheat and heat recovery systems.

Hydronic Balancing

Direct-return piping with calibrated balance valves at major take-offs, and at terminal devices.

Venturi flow meter on variable volume water loops, but no balance device.

Control Valves

Two-way valves at all terminal devices (VAV boxes), fan coils and heat exchanger.

Three-way valves at end of heating water distribution lines

Plumbing

Fixtures

Fixture Description Valve

Non Secure Water Closet

Wall hung, vitreous china

Zurn Z5615

1.28 gpf, Sensor flush, hard wired, exposed

Sloan Royal

Secure Water Closet With Integral Lavatory

Acorn Penal-ware 1449FA

Wall hung, blow-out, integrate with lavatory, stainless steel, vandal resistant flush valve

Toilet Flush Valve: 1.28 gpf, remote flush

Lavatory Faucet: single temperature, deck-mounted spout, 0.5 gpm, with vandal resistant push button metering valve

Urinal Wall-hung, vitreous china

Zurn Z5755

0.125 gpf, hardwired sensor, exposed

Sloan Royal 186

Lavatory Wall mount vitreous china

American Standard Decorum

Single temperature, deck-mounted sensor hard wired wired spout, 0.5 gpm

Sloan BASYS

Non Secure Shower

ADA hand shower with slide bar with mixing valve

American Standard 1662.211

Single handle, 1.5 gpm flow rate, pressure-balancing type

Secure Shower Ligature resistand shower head Ligature resistant diverter valve

Floor Drains Brass cover, with waterless trap primer n/a

Sink (Breakroom) Single compartment, stainless steel

Kohler Vault K-3894-4

Single handle pull-down kitchen sink,

1.5 gpm

American Standard Beale 4931.300

Garbage disposer

Insinkerator Badger ¾ HP

Sink (Medical) Single compartment stainless steel

Gooseneck faucet with manual wrist bland handles.

Mop Basin (Janitor)

28x28 Mop Sink Basin

Zurn Z5850

Zurn Z1996-SF

Fixture Description Valve

Sink With Eyewash Station

(Lab)

Top mount stainless steel

Kohler Toccata K-3348-3

Manual faucet 0.5 gpm

American Standard Beale 4931.300

Eyewash

Water Saver FE775LH with AP3600 Mixing valve

Water Cooler Dual level, refrigerated, with bottle filler and water filter

Elkay LZWS-LRPBM28K n/a

Sillcock Freeze-proof, as appropriate Loose key

Ice Maker Water Box

Wall box with supply water 1/4 –turn shut valve with integral shock arrestor and backflow preventer

Washer Water Box

Wall box washer supply water & drain

1/4 –turn shut valves with integral shock arrestors

Anti-ligature plumbing fixtures to be used at holding restroom and cells.

EPA low flow WaterSense fixtures.

Materials

Supply

Type L copper, with soldered or mechanical joints.

Waste

Cast iron above grade, solid-core PVC DWV in compliance with ASTM 2665, below grade (including roof drain)

Gas

Threaded black steel, or Corrugated Stainless Steel Tubing (CSST)

Roof Drain – Primary and Secondary

Cast iron above and below ground

Systems

Waste/Vent

Gravity drain all fixtures – no sewage ejector in building.

Trap protection will be with trap guards, no trap primers or deep seal p-traps

Domestic Cold Water

Entering Water Pressure ................tbd psig

PRV Setpoint ..................................60 psig

Design Flow Range ........................1 gpm – 175 gpm

PRV type ........................................Dual PRV Direct acting, two single PRVs

Backflow Prevention .......................Single Reduced Pressure Principle w/bypass

Hot Water

Source ..................................... Existing hot water storage tanks

Delivery Temp ......................... 120 F

Recirculation Strategy ............. Aquastat sensor

Legionella Control Strategy ............Generate and store water at 140 F

Scald Control ..................................ASSE Anti-scald valves at individual fixtures or banks of fixtures, as appropriate

Water Treatment

Soft Water

Hot water will use existing system.

Pure Water

No special water (RO, DI, Industrial) required.

Roof Drain

Primary/secondary roof drain system.

Primary roof drains will be cast iron and piped down through the building to below grade.

Secondary drains will be cast iron, route through the building and terminate 18” above grade with brass down spout nozzles.

Laundry

Laundry is storage only. All washing will be in existing portion of the building.

Dental

Vacuum pump

Compressed air

Domestic cold & hot water

Medical Gas systems

No medical gas systems will be provided, if required these would be provided by the Owner as portable systems.

Fire Protection

Fire riser

The existing fire protection service riser will remain, a second fire protection service riser is expected to accommodate the addition.

Sprinklers The buildings will be fully sprinklered by a wet type system.

No Clean agent (FM-200) and/or dry system will be provided.

Fire alarm is to be specified by electrical engineer.

Fully addressable system.

Alerts or troubles will remain in the fire alarm panel. Alarms will be sent to the BAS as a general alarm and to the municipal fire department.

Fire/smoke dampers, where required, are to be addressable and monitored, with end switches that positively confirm closed and open positions (commanded position notification is not acceptable) No water booster pumps are anticipated.

Fire Flow Test Results - tbd

Electrical Schematic Design Narrative Weber MMH and Transportation Remodel and addition

250528

Prepared for:

GSBS Architects

Prepared by:

Justin Luke, PE

Angelo Maratta

June 26, 2025

CODES AND STANDARDS

1. Latest edition of NFPA codes including:

a. NFPA 70; National Electrical Code

b. NFPA 72; National Fire Alarm & Signaling Code

c. NFPA 101; Life Safety Code

d. NFPA 110; Standard for Emergency and Standby Power Systems

e. NFPA 111; Standard on Stored Electrical Energy Emergency and

Standby Power System

2. 2021 International Building Code (IBC)

3. 2020 International Energy Conservation Code (IECC)

4. 2021 International Fire Code (IFC)

5. 2011 IESNA (Illuminating Engineering Society of North America)

The electrical system will be designed in reference to the following standards:

1. ASTM – American Society of Testing and Materials

2. IEEE – Institute of Electrical and Electronic Engineers

3. IESNA – Illuminating Engineering Society of North America

4. NEMA – National Electrical Manufacturers Association

5. NFPA – National Fire Protection Association

6. UL – Underwriters Laboratories

7. ADA – Americans with Disabilities Act

SITE UTILITY DISTRIBUTION

The current electrical service to the facility is not adequately sized to accommodate the calculated electrical demand for the addition and future adjacent buildings. This will require an extension from the nearest electrical service point determined by Rocky Mountain Power to the project area. A service size of 2500 Amps at 480 Volt, 3 Phase will be required. This is indicated in the schedule below based on the type of space(s) that will be fed from the service.

ELECTRICAL DISTRIBUTION

The distribution system will be sized to accommodate the needs of the addition along with the needs of the currently planned adjacent future spaces. The system will be robust yet simple to ensure the facility is able to maintain the system and extend into the future buildings with the minimal amount of impact to operations as possible.

All switchboards, distribution, and branch panels will be fully rated and consist of aluminum bussing and will be sized to provide a minimum of 25% space for future demands.

All main feeders will be aluminum and conductors sized at #12 AWG up to #1

AWG will be provided as copper.

Distribution transformers will be energy efficient and comply with DOE Energy

Efficiency Standards. Each transformer will contain aluminum windings and a temperature rise at the rated load of 40°C and shall not exceed 150°C. Due to the environments surrounding electrical rooms, all transformers will have a guaranteed audible sound level rating of 45db.

Due to the environments associated with the addition, all neutral conductors will be fully sized to allow for all non-linear or single-phase loads including but not limited to computers, video monitors, fax machines, copiers, cell doors, PLC electronics, telecommunications equipment, and medical electronic equipment. Since this equipment is single phase, the sinusoidal currents have a phase shift between them and therefore are not able to cancel each other out like they do with linear loads. Rather the values add together and create a load on the neutral conductors. This value is summarized as the Total Harmonic

Distortion (THD). Having an electrical system with a large THD value increases maintenance costs and reduces the power quality of the entire electrical system.

EMERGENCY DISTRIBUTION

The emergency electrical system will consist of a new…