6-20260501 EHS Field House Narrative Scope.pdf

SALT LAKE CITY OFFICE Design Excellence SOUTHERN UTAH OFFICE 723 Pacific Avenue, Suite 101 163 WEST 1600 SOUTH, SUITE 1

SALT LAKE CITY, UT 84104 ST. GEORGE, UTAH 84770

TEL 801-355-5959 FAX 801-355-5960 TEL 435-656-2883

May 1, 2026

Washington County School District Enterprise High School Field House Enterprise, Utah

Re: Bryan Dyer

The following is an explanation of the expected design requirements for the proposed field house at Enterprise High School. See attached for the additional requirements for mechanical, electrical, plumbing, and structural. The preliminary floorplan and site plan are also attached for reference.

The proposed building is to be a separate building on the north end of the property at Enterprise High School. This building will provide additional training support for the high school. It is proposed to have three retractable netting systems for batting practice and additional training equipment to be relocated into this building. The floor is planned to be turf with a rubberized running track at the exterior. The structure of the building is planned to be a metal structure supported by a four foot tall concrete masonry unit foundation wall. In addition to the main training area, additional restrooms and storage rooms will be provided.

Sincerely, Alicia Saunders Architectural Designer, Naylor Wentworth Lund Architects

WASHINGTON COUNTY SCHOOL

DISTRICT

Field House, Enterprise High School Enterprise, Utah Mechanical, Electrical and Plumbing Design Narrative

230 North 1680 East. Bldg V, St. George, Utah 84765 ◼ 801.530.31.48 ◼ www.resolutgroup.com

Submitted by: RESOLUT GROUP

April 27, 2026

Mechanical Design Narrative

Enterprise High School Field House

1. Project Overview

The proposed prefabricated metal building will provide a new indoor athletic facility for Enterprise

High School, supporting student health, physical education, and extracurricular activities.

The approximately 11,000-sf structure includes the following program elements:

• Restrooms serving occupants during track and exercise activities

• A small office, administrative space, storage and mechanical equipment

• A large open area for indoor track and general exercise/fitness use

The building will integrate with the existing campus while maintaining a simple, durable, and energy-efficient design appropriate for a high school environment in a high-desert climate characterized by cold winters, hot summers, and moderate daytime temperature swings. Mechanical systems are designed for reliability, ease of maintenance by school facilities staff, and compatibility with the existing Honeywell building management system (BMS) serving the main school building.

2. Mechanical (HVAC) Systems

The HVAC systems are designed to provide heating, ventilation, and cooling to maintain comfortable indoor conditions for athletic activities and occupied support spaces while promoting indoor air quality (IAQ) and energy efficiency.

Design Criteria

(Preliminary; to be finalized during detailed load calculations)

• Outdoor Design Conditions:

Based on ASHRAE or local climate data for Enterprise, Utah (approximately 95°F dry-bulb

/ 65°F wet-bulb cooling and winter extremes of 0°F or lower)

• Indoor Design Conditions:

o Exercise/track area:

▪ Heating: 68–72°F

▪ Cooling: 75–78°F

▪ Enhanced ventilation to accommodate high occupancy and athletic activity o Office and restrooms:

▪ Heating: 70–72°F

▪ Cooling: 74–76°F

• Ventilation:

Ventilation rates comply with the 2024 IMC and ASHRAE Standard 62.1, with increased air quantities provided for the exercise area to address moisture, odors, and elevated occupant density. Demand-controlled ventilation (DCV) is provided via CO₂ sensors integral with each rooftop unit.

• Energy Conservation:

All systems comply with the 2024 IECC (including Utah amendments), emphasizing high-efficiency gas-fired equipment and full BMS integration for scheduling, unoccupied setbacks, and energy optimization.

System Description

Primary Equipment

Multiple high-efficiency, gas-fired packaged rooftop units (RTUs) provide heating and cooling to the fitness area of the building and ducted high efficiency, gas-fired furnaces and condensing units to serve the office, restrooms, entry, corridor, storage and mechanical rooms.. Units include:

• Direct-drive supply fans

• Modulating gas burners for precise temperature control

• Economizers for airside “free cooling” when outdoor conditions permit

• Demand-controlled ventilation

• Powered convenience outlets

• Phase-failure protection

• Factory-installed hail guards

Installation

RTUs are mounted on 36-inch-tall prefabricated curbs installed at grade on concrete pads adjacent to the metal building structure. This approach minimizes roof penetrations and structural loading, improves maintenance access, and accommodates snow accumulation typical of the region.

Air Distribution

Supply air is delivered via lined exposed rectangular ductwork transitioning to spiral round duct.

Limited ducted runs with drum louvers are used in the open exercise area for cost efficiency, while the office and restroom areas are served by fully ducted systems.

Return air is provided through dedicated return ducts or transfer paths, as required, with return locations positioned low along the building perimeter near the RTUs.

Zoning

Separate HVAC zones are provided for the following areas:

• Large open exercise/track area (potentially served by multiple RTUs to promote even air distribution and system redundancy)

• Office area

• Restrooms

This zoning strategy accommodates differing usage patterns and prevents over-conditioning of the high-volume athletic space.

Controls Integration

All RTUs are integrated with a new Honeywell direct digital control (DDC) system, which interfaces with and piggybacks onto the existing Honeywell BMS serving the main school building.

The integrated system provides:

• Centralized monitoring and control

• Scheduling and calendar-based operation

• Alarm notification and trend logging

• Optimal start/stop and night setback control

• Demand-response capability

The system is accessible from the main campus facilities office and supports long-term operational efficiency.

Filtration

Each RTU is equipped with MERV 13 filters or better, accessible within the unit, to support improved IAQ in an athletic environment.

3. Plumbing Systems

Plumbing systems serve the restrooms and associated fixtures in the office area and are designed using durable, code-compliant materials suitable for a school environment.

Domestic Water System

• Insulated cold- and hot-water distribution piping utilizes:

o Type K copper piping for main runs and exposed risers (soldered joints) o PEX tubing for branch piping where flexibility and cost efficiency are advantageous

• Isolation valves are provided at major branches and at individual fixtures to facilitate maintenance

• Backflow prevention is provided at the building water service connection in accordance with code

Domestic Hot Water

Domestic hot water is supplied by tank-type, gas-fired water heaters with Type B venting. Water heaters are sized to meet peak demand conditions with adequate recovery capacity for intermittent high-use events. Units are located in a dedicated mechanical or utility space with clear service access and proper venting.

Sanitary Waste and Vent

• Sanitary waste and vent piping is constructed of Schedule 40 PVC, selected for durability, corrosion resistance, and constructability within a prefabricated structure

• Piping is routed below slab or within accessible chases to minimize impact on the open exercise space

• Floor drains with trap guards are provided in restroom and wet areas, with trap primers installed where required

Plumbing Fixtures

Low-flow, water-conserving plumbing fixtures—including toilets, urinals, and lavatories—are specified in compliance with IECC requirements and applicable school district sustainability and maintenance standards.

4. Natural Gas Piping

Natural gas service supplies fuel to the RTUs and domestic water heaters.

• Piping:

Schedule 40 black steel piping with threaded, welded, or approved press-type connections, sized for total connected load with appropriate diversity

• Routing:

Piping is routed underground or aboveground from the campus gas service point to a dedicated meter and regulator assembly. Interior piping is routed through protected areas with shutoff valves provided at each appliance and at the point of building entry.

• Compliance:

Systems comply with the 2024 IFGC and NFPA 54, including pressure testing, sediment traps, venting, and seismic requirements

• Metering:

A dedicated gas meter is coordinated with the serving utility and located for accessibility and ease of maintenance by school facilities staff

5. Honeywell Temperature Controls (BMS)

The temperature control system consists of new Honeywell DDC controllers provided for all packaged RTUs and associated sensors.

Scope and Integration

The new control system integrates seamlessly with the existing Honeywell BMS serving the main school building through compatible networking (BACnet or Honeywell proprietary protocol), enabling unified campus-wide monitoring and control.

System Capabilities

• Scheduling aligned with school calendars and athletic usage

• Alarm notifications for equipment faults, abnormal temperatures, and filter status

• Energy optimization, including economizer control and demand-controlled ventilation

• Graphical user interface accessible locally and remotely

• Trend logging and reporting for facilities management and diagnostics

The control system is coordinated with the fire alarm system for interlocks or shutdowns as required by code.

6. Electrical Systems

The electrical systems will consist of lighting, power distribution, fire alarm, telecommunications, intercom systems and security.

Lighting

There will be exterior lights designed for building entrances and the exterior mechanical equipment yard. Exterior lights will be controlled with photocell or integral ambient/motion sensors.

Interior lighting will consist of suspended LED hi-bays in the field area providing a 40-50 footcandle level. A combination of troffers and wraparound fixtures will be specified in the storage, restroom and front entry areas. All lighting will be controlled with occupancy sensors with local control.

Power Distribution

This building will be fed with a new 120/208V three phase electrical utility service. The exact service size will be determined after HVAC and equipment loads are provided. While there is a chance this building will only have (1) interior branch panel, it may be desired to have (2) interior branch panels to reduce circuit lengths.

All feeders and circuits will be in conduit (PVC if underground and EMT if above ground).

Receptacles will be provided around the perimeter of the field to provide flexibility in the field use and to insure power is specified where needed for batting cage machines.

Systems

• Fire Alarm:

Codes will require an automatic fire alarm system. A “slave” panel will be specified in the field house that will connect to the “master” Notifier fire alarm control panel in classroom building. The fire alarm system will consist of smoke and carbon monoxide detectors, strobes and horn/strobes to provide required notification. The fire alarm system will shut down fan units upon detector alarm.

• Telecommunications:

The new field house will connect to the main classroom building through a 12-strand single mode fiber connection. The new field house will have a small network rack where the fiber will terminate. This network rack will provide the capability for data drops and wireless access points.

• Intercom/Sound Systems:

The new field house will be equipped with intercom speakers and call switches to allow the ability to communicate between the two buildings and for the field house to receive bell tones for class changes. The intercom system will expand the existing

Rauland system and operate between the two buildings by using the fiber backbone described in the telecommunications section. Discussions will also take place to see if a sound system will be desired. One that would allow users to connect a phone for playing of music.

• Security:

Security cameras will be provided on the exterior and interior as required for Utah code and as coordinated with the school district. All security cameras will connect to the network rack. The existing DW Spectrum video management system will be expanded to accommodate any new cameras.

7. General Requirements

Codes and Standards

All mechanical, plumbing, gas and electrical systems comply with Utah-adopted 2024 I-Codes, applicable NFPA standards, ASHRAE guidelines, and local requirements of Washington County and

Enterprise High School.

Sustainability

High-efficiency HVAC equipment, low-flow plumbing fixtures, LED lighting and optimized BMS control strategies support reduced energy and water consumption and long-term operational efficiency.

Coordination

The mechanical and electrical designs will be closely coordinated with the architect, prefab metal building manufacturer, and structural engineer to confirm equipment curbs, penetrations, structural support, power requirements, and equipment clearances. All equipment selections allow safe service access without disrupting athletic activities.

Testing and Commissioning

The project includes full functional performance testing, testing and balancing, and BMS commissioning. Training is provided to school facilities staff on proper system operation and maintenance.

Warranty

Equipment and systems include standard manufacturer warranties and a minimum one-year contractor labor warranty, unless otherwise specified.

BHB = RESPONSIVENESS + COORDINATION + CREATIVITY

BHB CONSULTING

ENGINEERS, INC

2766 South Main St reet

Salt Lake City, UT 84115

p. 801 355 5656 bhbengineers.com

April 29, 2026

Naylor W entworth Lund Archite cts

163 W 1600 S

St. George, UT 84770

RE: Structural Criteria for Enterprise High S c hool Field House Prefabricated Metal Building

The metal building sh all be designed and fabricated for the dimensions , layout, and openings shown in the architectural concept drawing. Openings for mechanical ductwork shall be accommodated where required. Minimum clearance to bottom of structure shall be provided as indicated in the architectural narrative. Where possible, entrance canopy structures shall also be designed and provided by the metal building supplier . If this is not possible these structures will be designed by others with a portion of the vertical and horizontal loads to be supported by the metal building.

T he metal building shall be designed for the following structura l criteria and loading:

Governing Code: IBC 2024 and ASCE7 -22 with Utah Amendments

Risk Category: 3

Ground Snow Load: 91 psf (LRFD)

Soil Site Class: DE (Assumed)

Seismic Design Category: D

Ss: 0.47

S1: 0.14

SDS: 0.49

SD1: 0.31

Wind Speed: 106 mph

Exposure: C

Dead Loads: Structure self -weight , all miscellaneous architectural and MEP components , including, but not limited to, lighting, ductwork, conduit, piping, fire detection system, ceiling fans, and hard lid ceiling over restroom area .

Other Special Loading Criteria: (3) Batting Cages (~70 ’x12 ’), (1) Digital Clock, Speaker/PA system, Allotment for gravity and horizontal loading from small entrance canopies, bracing loads of interior metal stud walls in storage and mechanical rooms.

Sincerely, Andrew Van Hook, SE Principal BHB Structural Andrew.vanhook@bhbengineers.com