1_ACA_Crew_B-3_Narrative_30_Dec_2015.pdf

Project: WYTDO79032 30 December 2015

Type B-3 Design Submittal

Construct ACA Alert Crew Quarters Facility Toledo Air National Guard Base, Ohio i

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Table of Contents

2.0 Design Narrative

2.1 Civil/Site

2.1.1 Codes and Standards

2.1.2 Existing Site Conditions

2.1.3 Facility Siting

2.1.4 Removals

2.1.5 Paving

2.1.6 Vehicle Parking

2.1.7 Grading

2.1.8 Storm Drainage

2.1.9 Energy Independence and Security Act (EISA) Section 438 Requirements

2.2 Utilities

2.2.1 Water Distribution

2.2.2 Sanitary Sewer

2.2.3 Natural Gas

2.2.4 Meters

2.2.5 Antenna

2.3 Architecture and Landscaping

2.3.1 Codes and Standards

2.3.2 Design Criteria

2.3.3 Landscaping

2.3.4 Sustainable Design

2.3.5 Design Narrative

2.3.6 Interior Walls

2.3.7 Ceilings .................................................................... Error! Bookmark not defined.

2.3.8 Glazing/Windows

2.3.9 Interior Natural Daylighting

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2.3.10 Doors, Door Hardware and Access Control Systems

2.3.11 Thermal Breaks, Expansion Joints, Sealants, and Control Joints

2.3.12 Flooring Materials

2.3.13 Interior Casework

2.3.14 Additional Information

2.4 Structural

2.4.1 Codes and Standards

2.4.2 Design Criteria

2.4.3 Foundations

2.4.4 Structural Frame and Slab

2.4.5 Exterior Walls & Roof

2.5 Mechanical and Plumbing

2.5.1 Codes and Standards

2.5.2 HVAC Design Criteria

2.5.3 HVAC Systems

2.5.4 LEED Implications

2.5.5 Fire Protection

2.5.6 Fire Protection General

2.5.7 Fire Flow Tests

2.6 Electrical

2.6.1 Codes and Standards

2.6.2 Electrical Distribution

2.6.3 Exterior Communications

2.6.4 Interior Electrical Power Distribution

2.6.5 Lighting

2.6.6 Emergency and Exit Lighting

2.6.7 Lightning Protection

2.6.8 Fire Alarm System

2.6.9 Communications

2.6.10 Local Area Network (LAN) System

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2.6.11 Mass Notification System

2.6.12 Community Antenna Television (CATV)

2.6.13 Closed Circuit Television Security System (CCTV)

2.6.14 Radio Frequency Distribution

2.6.15 Paging System

2.6.16 Klaxon System

2.6.17 Photovoltaic System

2.6.18 Advantor Intrusion Detection System and Access Control System

2.7 Energy and Environmental

2.7.1 Codes and Standards

2.7.2 Design Criteria

2.7.3 LEED®

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2.0 Design Narrative

2.1 Civil/Site

2.1.1 Codes and Standards

The facilities will conform to the latest edition of the following guidelines and standards:

• ANG ETL 01-1-1 Air National Guard Design Policy

• UFC 3-201-01 Civil Engineering

• UFC 3-250-01FA Pavement Design for Roads, Streets, Walks, and Open Storage Areas

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings, 9 February 2012

2.1.2 Existing Site Conditions

The site is located at the south end of the Air National Guard Base Runway and directly west of the current aircrew facility (Building 601). The site slopes from north to south with an existing ditch/swale located at the southern edge of the site. The northern portion of the site contains asphalt pavement while the southern part of the site contains grass that slopes to an existing ditch. The existing aircrew facility shall remain in use and undisturbed during construction of the new aircrew facility. Access to the project site must be obtained from the south or west and shall not disrupt or interfere with any activities associated with the existing aircrew facility.

During construction, the contractor is required to comply with ICS 705 technical specifications for construction in a secure working area.

2.1.3 Facility Siting

The siting of proposed new aircrew facility is approximately 55 feet west of the existing aircrew facility, 40 feet north of the existing south fence line, and around 58 feet east of the existing west fence line. The proposed location of the new aircrew facility has been positioned so existing underground electric and cable lines to the west and existing underground electric, cable and gas lines to the east remain undisturbed during construction of the new building. The building is oriented east west along its longest axis with the front of the building facing the runway to the

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north. Access to the new aircrew facility is located at the existing security gate located southeast of the existing aircrew facility which serves as the current entry point for the existing aircrew facilities.

2.1.4 Removals

Asphalt and concrete pavement will be removed with this project for the construction of the new aircrew facility. The existing fence along the south or west part of the site will be temporarily removed for construction access. Following construction activities, this fence will be reinstalled at its current location and alignment. During construction, the contractor is required to comply with ICS 705 technical specifications for construction in a secure working area.

2.1.5 Paving

The existing airfield concrete paving removed during construction of the ACA Crew Facility will be replaced following construction of the facility.

A thirty (30) feet by thirty (30) feet asphalt shoulder will be constructed on the east and west side of the ACA Crew Facility.

2.1.6 Vehicle Parking

No parking is provided with the new aircrew facility.

2.1.7 Grading

The existing concrete runway slopes to the north. In addition, there is significant grade change from the southern edge of the asphalt where the new ACA building we be located towards an existing ditch to the south.

Due to the location of the proposed building, the existing ditch will be shifted towards the south to eliminate the need for a retaining wall on the south edge of the building. The new building’s finished floor will be set at an elevation to maintain positive surface drainage away from all doors and finished floor.

2.1.8 Storm Drainage

Downspouts will discharge the roof storm drainage to the adjacent grading.

The ultimate discharge location for the site’s stormwater runoff will be through an existing culvert located southwest of the proposed building.

Two existing storm pipes are in close proximity to the proposed aircrew

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facility and discharge into the existing ditch as mentioned in the previous sections.

2.1.9 Energy Independence and Security Act (EISA) Section 438 Requirements

Per the requirements in Section 438 of the EISA, the sponsor of any development or redevelopment project involving a Federal facility with a footprint that exceeds 5,000 square feet shall use site planning, design, construction, and maintenance strategies for the property to maintain or restore, to the maximum extent technically feasible, the predevelopment hydrology of the property with regard to the temperature, rate, volume, and duration of flow. This particular project involves the disturbance of approximately 19,738 square feet of ground area and therefore is required to comply with Section 438 of the EISA.

This project will comply with Section 438 of the EISA by using the Option 2, “Site-Specific Hydrologic Analysis” method, referred to in the Section 438’s Technical Guidance. Method 2 allows for the designer to design, construct, and maintain stormwater management practices that preserve the pre-development runoff condition following construction. The pre-development conditions for this project are as follows: total ground area = 19,738 sf, total impervious area = 9,527 sf, total pervious area = 10,211 sf.

This project involves removing approximately 1,361 sf of impervious surface. The post-development conditions will be the following: total ground area = 19,738 sf, total impervious area = 8,166 sf, total pervious area = 11,572 sf. In addition to reducing the impervious area by 14 percent, the project will disconnect the downspouts to the building’s adjacent surface. The result of decreasing the impervious area by 1,361 sf and disconnecting downspouts will decrease the post-construction’s rate, volume, duration and temperature of runoff in compliance with the requirements of Section 438 of EISA.

2.2 Utilities

2.2.1 Water Distribution

Potable water service and fire water service is required for the proposed aircrew facility. Adequate water is available on site and in close proximity to the buildings. The location of the aircrew building will require the addition of approximately 50 linear feet of new water line and 50 linear feet of new fire water line. The new water and fire lines will exit the new building on the south side and connect to an existing 6” water line approximately 50 linear feet to the south.

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The project will include a new water branch line and new fire hydrant as an Optional Bid Item.

2.2.2 Sanitary Sewer

Sanitary sewer service is required for the proposed aircrew facility. An existing sanitary sewer main is not located in close proximity to the building and therefore will require 420 linear feet of new 6-inch sanitary line, one sanitary sewer manhole, and one sanitary cleanout to connect to the existing sanitary sewer system. The proposed sanitary service will exit the new building on the south side of the building and flow by gravity to the existing sanitary sewer system.

2.2.3 Natural Gas

Natural gas is required for the proposed aircrew facility. Natural gas service is in close proximity to the building and requires additional piping. The aircrew facility will require approximately 100 linear feet of new gas piping.

The new gas service will exit the building on the south side and connect to the existing gas line located to the east of the new air crew facility. The proposed air crew facility has been located to avoid existing gas lines (feeding hangers) being within the footprint of the building.

2.2.4 Meters

Advanced utility meters shall provide quantitative data for energy consumption analysis. Advanced utility meters will be installed and interfaced with EMCS DDC to evaluate energy decisions.

2.2.5 Antenna

A structural support base will be provided for the new antenna located on the south side of the crew quarters facility.

The structural support base is included by the antenna manufacturer provider.

2.3 Architecture and Landscaping

2.3.1 Codes and Standards

The facilities will conform to the latest edition of the following guidelines and standards:

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• American Barriers Act (ABA)

• Air National Guard Design Policy ANG ETL 01-1-1 Final, March 2004 (Tab D)

• AFMAN 32-1084 Air Force Manual Facility Requirements, 20 April

• ASTM F2248 Design Approach for Laminated Glass Glazing Systems

• ASTM E1300 Standard Practice for Determining Load Resistance of Glass in Buildings

• IBC 2012 International Building Code, 2012

• ISO/TC 145 Graphical Symbols and Safety Signage

• NFPA 10 Standard for Portable Fire Extinguishers

• NFPA 101 National Fire Prevention Association Life Safety Code

• UFC 1-200-01 General Building Requirements

• UFC 3-600-01 Fire Protection Engineering for Facilities

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings, 9 February 2012, Change 1, 1 October 2013

2.3.2 Design Criteria

The design life of the new ACA Alert Crew Quarters Facility is assumed to be 50 years and appropriate, durable, materials will be specified in the design. The architectural appearances of the buildings will conform to Toledo Air National Guard Base Standards and will be subject to the approval of Ohio Air National Guard Base Civil Engineering (BCE). The exterior envelope, building systems, wall assemblies, roof assemblies, exterior glazing and exterior door systems will be in compliance with Department of the Air Force Design Objectives and Procedures as applicable, USGBC LEED® principles as applicable, and the Statement of Work.

2.3.3 Landscaping

Any non-hard surface areas within the project boundary shall be grass due to the building’s location within the secure perimeter of the flight line.

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2.3.4 Sustainable Design

Definitions vary for “green” or “sustainable” building design due to the large scope of sustainable issues and sustainable principles. Designs of sustainability range from broad concepts that incorporate all aspects of sustainability to narrow proposals focused on one specific sustainable design feature, such as recycled-content materials or energy efficiency.

Within this broad spectrum, green buildings rely on a philosophy intent on balancing environmental responsiveness, resource efficiency and cultural and community sensitivity. The goal of this process is to create facilities that meet the needs of facility end users and stakeholders while being mindful of the needs of future generations.

Green building design includes all players in the development process from the Design Working Group (Ohio Air National Guard (OHANG) BCE, NGB/A7OC, 180th Fighter Wing end users/stakeholders, the A-E, and consultants). The design team shall work as a cohesive unit during the design process to evaluate sustainable options to generate a design that strikes the best balance among function, sustainability, cost, and long-term durability.

Refer to the sustainability section of this document for additional information. The project shall strive to meet a sustainability goal of USGBC LEED Silver, adhere to the Energy Policy Act 2005, Federal Sustainable Buildings MOU, Executive Order 13423, and Energy Independence and Security Act 2007.

2.3.5 Design Narrative

The ACA Alert Crew Quarters Facility shall be designed per the guidelines and standards listed above and per the information listed in the rest of this Design Narrative, which is based on information provided by the BCE, the 180th new Flight Commander and data collection gathered during various design meetings with base personnel.

The ACA Alert Crew Quarters Facility shall be one single story reinforced concrete masonry unit (CMU) structure with insulated cavity wall and split faced brick exterior. Laminated blast-resistant windows on the north flight line side of the building will provide crew members with visual access to the flight line. The building shall have adequate structure height to accommodate finished ceilings in the range of 8 feet to 9 feet 4 inches clear.

See below for additional requirements for the various assemblies within the building.

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2.3.6 Interior Walls

Interior wall construction and finishes will be designed in accordance with ANGB Design Policy ANG ETL 01-1-1 Final (Tab D), USAF Interior Design Standards, and UFC 3-120-10 Interior Design, 1 July 2007.

Construction of interior partitions and walls will be defined by their intended use, and will match the activities within the space.

Interior partitions will be primarily painted gypsum board on metal studs with a 4-inch rubber wall base. Walls shall carry appropriate fire ratings, as required by design codes. See life safety plan for locations.

Sound attenuation shall be of primary concern throughout the building, especially at the Pilot Rooms, Maintenance Rooms, Gym, Ready Room/Lounge, administrative work areas, and all corridors. These walls shall extend from floor to underside of structure and contain enhanced sound attenuation insulation. Acoustical design of partitions shall meet or exceed the minimum STC criteria established by code or base requirements. Sound acoustical design principles shall be utilized to minimize intrusive exterior noise, noise transfer to the corridors from the gym, and noise transfer to administrative and personnel spaces from building mechanical spaces. For this submission, all gypsum board partitions have a sound transmission class (STC) of minimum of 47.

Restrooms shall have durable slip-resistant ceramic tile floor and base, with ceramic tile wainscot to 4 feet high with full-height ceramic tile in the showers and on all wet walls should Optional Bid Item be selected. If not, the floors shall be sealed concrete flooring and walls shall be a water-resistant solid material. Toilet partitions shall be solid surface and shall be wall mounted or ceiling mounted where required.

The Secure Area Briefing Room will be constructed of solid CMU and the room will be built to applicable sensitive compartmented information facility (SCIF) standards. Walls, and floor, shall be permanently constructed and attached to each other. Walls surrounding SCIFs shall have an STC rating of 50. These concrete walls shall be furred and finished with painted gypsum board to match adjacent spaces with painted gypsum board.

Ceilings throughout the rest of the facility are primarily 2 foot by 2 foot acoustical lay-in ceilings. The suspended ceiling system shall adhere to applicable base standards and Tab D.

Restrooms, janitor closets, and other areas prone to moisture will be constructed with mold and moisture resistant painted gypsum board ceilings. The overhead structure in the CAMS/IMIS, the Mechanical/Electrical Room, and the Telecommunications Room will be painted exposed structure.

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2.3.7 Glazing/Windows

Thermally broken aluminum frames will be used for all exterior glazed openings and designed in accordance with ASTM F2248. Glazing shall be double-pane insulated glazing that meets or exceeds the requirements for u-value and solar heat gain coefficient outlined in the most recent version of ASHRAE 90.1, while maintaining as much visible light transmittance as possible. All glazing shall conform to applicable installation standards and UFC 4-010-01 where applicable.

All exterior windows shall be blast-resistant laminated glazing per Standard 10 per UFC 4-010-01 and 4-010-02. All blast-resistant windows throughout the ACA Alert Crew Quarters Facility are 2 feet wide by 3 feet 4 inches high.

2.3.8 Interior Natural Daylighting

Due to budget constraints, and as requested by the contracting officer, the project has minimal window openings.

2.3.9 Doors, Door Hardware and Access Control Systems

Exterior 2 inch metal door frames shall be welded construction, fully grouted in compliance with ANSI A250.4-2001, Level 3 or 4, performance level A.

The exterior double doors into the CAMS/IMIS room will be solid, insulated heavy-duty hollow metal doors in welded grout-filled frames.

Hardware shall be commercial grad cypher access control lock with authorized keyed over-ride. The exterior double doors will include weather stripping, threshold, vinyl door sweeps, and a rain guard. The interior single door that enters the CAMS/IMIS room from the west interior corridor with be design with exterior door features. This door will have passage hardware. The door will be solid wood in hollow metal frame with weather stripping and door sweep to prevent cold air from entering the building.

The two north exterior entrance doors are the main entrances into the Crew Quarters facility. These doors will be insulated hollow metal doors with a narrow blast-resistant laminated glazing vision panel. These doors will have door closers, weather stripping, vinyl door sweep, and threshold.

A rain guard will not be required if the OBI is accepted to add a small canopy because the new Flight Commander requested a small roof overhang over these two main entrance doors. These two entrance doors require non-electrified mortise hardware with cypher access control on the exterior of the building. There will not be any special access control devices

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required on the inside of the doors. The doors will have panic bar egress hardware to disengage the cypher locking device and allow for swift exiting of pilots (airmen) out of the building to the aircrafts.

The two south exterior doors are for emergency egress only. As in the case with all other exterior doors, except the main entrance doors with the vision panel, they will be solid, insulated heavy-duty hollow metal doors in welded grout-filled frames. They will include a door closer, weather stripping, door sweep, and threshold. There will be non-electrified panic bar hardware mounted on the interior side of the door. There will be no hardware mounted on the outside. Keyed access into the building will not be required at these two doors.

The exterior door into the Mechanical/Electrical room is solid heavy-duty non-insulated hollow metal door in welded grout-filled metal frame. The door will require weather stripping, vinyl door sweep, and threshold to prohibit moisture from possibly entering the equipment room. Hardware will be keyed mortise storeroom function locking controlled only by authorized BCE maintenance personnel.

All interior doors will be solid wood doors in hollow metal knock down frames except for the Secure Area Briefing Room. This room will have concrete masonry unit (CMU) walls with solid wood doors in welded grout filled metal frames. The door will require access control security hardware including a storeroom function lockset, combination lock (Kaba-Mas CD- X09 GSA) approved or equal, GSA approved deadbolt, electric strike with positive engagement, sound seals and threshold, heavy-duty hinges, and closer without any hold-open arm. The room will be designed as Sensitive Compartmented Information Facilities (SCIF). Only the Secured Briefing Room will operate as a SCIF, however the SOF / Operations Room can easily be converted as a SCIF if mission requires. The base bid will is to have only the Secured Briefing Room built out as a SCIF. The SOF / Operations Room will be built out per SCIF specifications should an OBI be accepted to make the SOF / Operations Room a potential SCIF. The base bid will include a proximity card reader mortise storeroom lockset with request to exist (RX), fail secure, free egress.

The Alert Commanders office and Maintenance Flight Supervisor Office will have a mortise keyed office lockset. No electronic access control is required. The Telecommunications Room will have a keyed storeroom function mortise lockset.

The four Pilot Rooms and the five Maintenance Rooms will not require keyed entry at single bed rooms but double bed maintenance rooms shall have keyed entry option. These rooms will have privacy locks on the inside

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of the room similar to a hotel room. These doors will not require door closers.

Remaining doors into the Kitchen/Dining, the Ready Room/Lounge, Laundry Room, Pilot Lounge, Lockers/Computer Room, and the Gymnasium will have passage function door hardware.

Refer to Attachment 15 – Individual Space Criteria Data Sheet and Meeting Notes from the Criteria Review Conference (CRC) held on May 2, 2014 for additional design direction from the new Flight Commander and additional equipment and furnishings that will be provided through other appropriations. Individual Space Data Sheets were updated following review comments during the 65% review.

All functional spaces in the new ACA Alert Crew Quarters Facility, including all toilet rooms and showers, shall meet all accessibility requirements per the American Barriers Act (ABA).

2.3.10 Thermal Breaks, Expansion Joints, Sealants, and Control Joints

Concrete and masonry walls (both load-bearing and veneer) will have control joints spaced according to industry best practices. Walls shall employ sealants and weep holes as required to ensure the durability of the wall. Care must be taken not to trap moisture where it could cause damage or foster mildew. The exterior glazing system will contain thermal breaks to ensure that the energy efficiency of the window is maintained. Foundations and slabs shall incorporate an integral thermal break or include perimeter thermal insulation at all occupied spaces.

2.3.11 Flooring Materials

Floors throughout the most of the daily occupied spaces and sleeping quarters of the building shall be carpet. Exceptions: Restrooms and showers (ceramic tile as an OBI), Mechanical/Electrical Room and CAMS/IMIS (sealed concrete), Corridors, Laundry, Life Support, Lockers/Computers, and Kitchen/Dining (VCT), Gym (rubberized athletic flooring should an OBI for the rubberized athletic flooring be accepted). The base bid for the Gym flooring shall be sealed concrete.

2.3.12 Interior Casework

Casework in the kitchen and administrative areas shall be plastic laminate uppers and lower cabinetry with full extension drawer slides and heavy-duty hinges. Counters in the kitchen shall be plastic laminate materials. The south wall kitchen cabinetry and kitchen island will be an OBI. The kitchen

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island will have a butcher block countertop. Counters in administrative areas shall be plastic laminate. All counter construction, including counter hardware and cabinetry heights shall be in compliance with ABA.

2.3.13 Additional Information

Refer to Volume V, Section B: Attachment 15 – Individual Space Criteria Data Sheet and Section A: Meeting Notes from the Criteria Review Conference (CRC) held on May 2, 2014 for additional design direction from the new Flight Commander and additional equipment and furnishings that will be provided throughout the building from other appropriations.

2.4 Structural

2.4.1 Codes and Standards

Structural design will conform to the latest edition of the following guidelines and standards:

• ACI 318-08 Building Code Requirements for Structural Concrete

• ACI 530-08 Building Code Requirements for Masonry Structures

• AISC 360-05 2005 Specification for Structural Steel Buildings

• ASCE 7-05 American Society of Civil Engineers 7-05 Minimum Design Loads for Buildings and Other Structures, 2005

• AWS D1.1 American Welding Society, latest edition

• SDI Steel Deck Institute, latest edition

• IBC 2009 International Building Code, 2009

• OBC 2011 Ohio Building Code

• UFC 1-200-01 General Building Requirements, with Change 2, 28 November 2011

• UFC 3-301-01 Structural Engineering, with Change 2, 31 January

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings, 9 February 2012

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2.4.2 Design Criteria

Loads and assumptions are as follows:

Dead Load: Calculated according to the actual weight of materials plus a 10 psf hung load allowance from the roof framing.

Live Load: First floor/slab on grade 150 psf

Collateral loads, as required to support miscellaneous loads:

Snow Load: Ground Snow: 20 psf, Minimum Low-Slope Roof Snow Load: 25 psf.

Drift Loading and Unbalanced Loading will be considered in the design.

Wind Load: Speed (3-second gust) is 90 mph; an exposure factor of “C” will be used. Importance factor Iw = 1.0

Seismic Load: Design Category “B”

Ss = .013 g, 0.2 sec. period spectral acceleration

S1 = .054 g, 1.0 sec. period spectral acceleration

Importance factor Ie = 1.0

2.4.3 Foundations

The description of the foundation system in this narrative is based on consultations with geotechnical subsurface investigation for the proposed structure conducted by Construction Consulting and Testing, CCT dated April 8, 2013 included with this submission. Two subsurface borings to depths of 25 feet below existing grade, site reconnaissance, laboratory testing of field samples and engineering evaluation of the site soils were performed. The allowable bearing capacity of soil is 2000 psf. Ground water elevation was discovered to be 6 feet below the existing grade. The foundation system based on the soil report will consist of continuous wall and spread footings at depths of 4 feet below existing grade. A reinforced cast in place concrete foundation wall will support the CMU cavity wall below grade to the continuous wall footings. The frost penetration shall be in accordance with UFC 3-301-01. Exterior footing depths will be set to prevent frost heave. Interior footings will bear a minimum of 48 inches below finished floor elevation topped with reinforced cast in place concrete piers.

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2.4.4 Structural Frame and Slab

The first floor will consist of a 4” slab supported on grade. Perimeter walls will be reinforced CMU bearing walls with interior steel columns as required. The roof structure will consists of steel bar joists spaced at approximately five feet on center supported by structural steel wide flange beams at the ridge line. The steel framing will be topped with 1 ½” steel deck roof.

2.4.5 Exterior Walls & Roof

The finish material for the exterior walls will be CMU cavity wall construction with split-faced CMU veneer and load bearing eight inch reinforced CMU block. The loading bearing CMU wall will be designed to withstand blast loads per UFC 4-010-01 with an assumed standoff distance of 60 feet. The building shall have a sloping roof with standing seam metal panels over rigid insulation. The roof pitch will be 3/12.

2.5 Mechanical and Plumbing

2.5.1 Codes and Standards

HVAC system design will provide the required comfort conditions and energy efficient systems according to Air Force energy standards. HVAC design will conform to the latest edition of the following guidelines and standards:

• AF ETL 08-13 Incorporating Sustainable Design and Development and Facility Energy Attributes in the Air Force Construction Program USAF Entry Control Design Guide Base Standards

• ANG (TAB C) Design Objectives and Procedures - HVAC

• ASHRAE 62.1 Ventilation for Acceptable Indoor Quality

• ASHRAE 90.1 Energy Standard for Buildings Except Low- Rise Residential Buildings

• IBC 2011 International Building Code, 2011

• IMC 2011 International Mechanical Code, 2011

• UFC 3-400-02 Engineering Weather Data

• UFC 3-401-10N Mechanical Engineering, with Change 1

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• UFC 3-410-01FA Heating Ventilating and Air Conditioning, with Change 4

• UFC 3-410-02 Direct Digital Control for HVAC and other local Building Systems

• UFC 3-470-01 Utility Monitoring and Control Systems

• UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings

• UFC 4-010-05 SCIF Planning, Design, and Construction

2.5.2 HVAC Design Criteria

Physical Location: Toledo Air National Guard Base (TANGB)

Latitude: 41.6 N

Longitude: 83.8 W

Elevation: 692 feet

Outdoor Design Conditions:

Summer: 90 degrees F DB/73 degrees F WB (1% occurrence)

Winter: -3 degrees F DB (99% occurrence)

Degree Days Clg (65°F) 715

Degree Days Htg (65°F) 6468

Indoor Design Temperatures:

Administrative Areas, Bedrooms, Lounges, gym, offices and mixed occupancies:

Air conditioned space 75°F DB - Heated spaces: 68°F.

Kitchen/Dining:

Air conditioned space 75°F DB - Heated spaces: 68°F. A kitchen hood will be provided above the residential style kitchen range. The residential style hood will be exhaust directly outdoors.

Secure Area Briefing Room:

Air conditioned space 75ºF DB - Heated 68°F. This space shall be served by the main air handling unit with room penetrations and sound transmission minimalized. For ease of maintenance, access to mechanical

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equipment and serviceable items will be provided outside the secure areas. This space will be designed as a SCIF.

Communications Room:

Air conditioned space 72ºF DB year round. Redundant dedicated HVAC ductless split system will be provided for this room.

SOF/Operations Center:

Air conditioned space 75°F DB - Heated 68°F. This space shall be served by the main air handling unit with room penetrations and sound transmission minimalized. For ease of maintenance, access to mechanical equipment and serviceable items will be provided outside the secure areas. This space will be designed as a SCIF if an OBI is accepted.

Restrooms:

These spaces will be continuously exhausted. Ventilation/make-up air will be provided through transfer openings; heating in winter 68°F.

Mechanical/ Electrical and storage areas:

Summer ventilation to maintain 85°F DB - Heated to 55 degrees F.

Janitors Closet and Storage/Laundry Areas:

These spaces will be continuously exhausted. In general will not be air conditioned unless required for quality control of specific equipment, materials, or tasks and will be ventilated.

Dryer vents shall be included to the outdoors.

Relative Humidity:

Winter: 20 percent minimum, based on ambient conditions and design occupancy

Summer: Maximum 60 percent

Filter:

Pre-filters MERV 8 and Final carbon filters per ASHRAE 52.2 to filter out any fumes and vapors from jet fuels.

Controls:

DDC in accordance with UFC 3-410-02 Direct Digital Control for HVAC and Other local Building Systems and UFC 3-470-01 Utility Monitoring and

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Control Systems (UMCS)

Exhaust Rates:

Toilets: 70 cfm per fixture

Outside Air Rates: Per ASHRAE Standard 62.1

Full-Time Offices: 5 cfm / person + 0.06 cfm / ft2 Telecom: 0.06 cfm / ft2 Lobby/Waiting Areas: 5 cfm / person + 0.06 cfm / ft Locker rooms: 0.5 cfm / ft2

Security Measures:

The system shall include security measures as required by UFC 3-470-01 utility monitoring and control.

2.5.3 HVAC Systems

2.5.3.1 General HVAC Systems

The building will be served by a high efficiency, variable volume packaged outdoor roof-mounted air handler unit with indirect gas-fired heat and direct expansion cooling, MERV 8 prefilter, 2” Carbon final filter, supply air fan controlled with variable speed drive, and return air fan controlled with variable speed drive. Outside air intakes shall be a minimum ten feet above ground per ATFP. The variable volume system will serve variable-air-volume (VAV) terminal units with hot water reheat coils. Heating hot water shall be provided by high efficiency condensing boilers. The VAV terminal boxes shall be electronic DDC controlled with occupancy sensor and/or time-of-day schedule overrides for energy conservation and carbon dioxide monitoring for densely occupied spaces (25 occupants per 1,000 square feet). The system shall use demand based static pressure reset control to reduce fan energy consumption. Energy recovery ventilation will be included in the HVAC system.

The variable volume system will serve variable-air-volume (VAV) terminal units with hot water reheat coils for each of the spaces or zones. Heating hot water shall be provided by high efficiency condensing boilers. The VAV terminal boxes shall be electronic DDC controlled with a combination of occupancy sensors and thermostats. Time-of-day schedule overrides for energy conservation and carbon dioxide monitoring for densely occupied spaces (25 occupants per 1000 square feet) shall be

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provided. The system shall use demand based static pressure reset control to reduce fan energy consumption.

Communication rooms will be served by a redundant cooling only split-system with direct expansion cooling with low ambient cooling (-20°F).

There will be a minimum of two (2) condensing high efficiency natural gas hot water boilers. The heating hot water system will use a primary-secondary pumping system to distribute the heating hot water. Each boiler will have a dedicated constant speed pump and the secondary side will have two (2) pumps with one pump serving as backup to distribute heating hot water to the equipment. Variable frequency drives will be used to control the speed of these pumps based on system differential pressure.

2.5.3.2 SCIF Requirements

The Secure Area Briefing Room will be treated as a SCIF. The SOF / Operations Room will be constructed as a SCIF if the OBI for SOF / Operations Room SCIF construction requirements is accepted as an OBI.

This Secured Briefing Room, or both spaces shall have minimum room penetrations and be controlled for sound transmission. HVAC ductwork will be provided with a nonconductive break (flex connector) adjacent to the penetration with a waveguide RF filter. Penetrations shall be completely sealed with acoustical foam to match the adjacent wall penetrations with fire stopping as required. Sound attenuation devises shall be installed to prevent any sound transmission. All duct penetrations larger than 96 square inches shall be protected with affixed bars 6-inches on center with an access door for inspection within the SCIF perimeter.

2.5.3.3 Distribution Systems

Supply, return and exhaust air will be distributed via ducted air systems.

Variable-air-volume systems will consist of medium pressure and low pressure supply ductwork with variable-air-volume air terminals with hot water reheat. An exhaust system will be provided to serve the restrooms, locker rooms, and janitors closet.

Heating hot water for the air terminal reheat coils and unit heaters will be distributed using a primary-secondary piping system.

Hot water unit heaters will be ductless.

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2.5.3.4 Noise Control

Well-designed HVAC systems shall limit the sound transmitted from the HVAC equipment to surrounding areas. Sound levels from the HVAC system should not exceed the noise level specified for the different spaces.

Lower duct velocities and appropriate duct fittings shall be utilized in the design to limit the noise levels. Where ductwork systems cannot be designed to provide required noise levels, duct attenuators shall be installed to provide the required noise reduction. Duct attenuator pressure drops shall not exceed 0.3” water column. VAV boxes shall include sound attenuation to maintain sound criteria as necessary.

Maximum noise levels in the occupied spaces produced by the HVAC systems shall be the stricter of either the latest ASHRAE Fundamentals Handbook or as noted below:

Location Recommended Noise Level RC (N)

Private Offices, Classrooms, Mixed Occ. & Sleeping Rooms

25 – 35

Open Office Space, Conference 30 – 40 General Purpose Storage 30 – 40

2.5.3.5 Motors

All equipment shall be provided with NEMA Design B premium-efficiency motors with a power factor of 0.90 or higher. Motors rated at 1/2 horsepower or lower shall operate at 120/1/60 volts. Motors 3/4 horsepower or higher shall operate at 208/3/60 volts. Motors used in variable speed applications shall be Inverter Duty rated with Class F insulation. These motors shall also be provided with shaft grounding systems.

2.5.3.6 Vibration and Seismic Control

Mechanical vibration and seismic controls, including vibration isolators, vibration isolation bases, inertia bases, seismic restraints and snubbers are to be provided on all equipment, piping and ductwork systems in accordance with UFC 3-310-04. The main building systems and equipment shall be seismically braced based on the Category of Facility as determined by UFC 3-310-04.

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2.5.3.7 Ductwork

Ductwork shall be constructed of galvanized steel sheet metal, and shall be rectangular, round spiral, or flat oval as appropriate for the specific application. All duct design shall be in accordance with Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) Duct Construction Standards. Rectangular ductwork shall not exceed a 4 to 1 aspect ratio. Ductwork shall be sized so ASHRAE Standard 90.1 fan power limitations are not exceeded.

Ductwork shall be designed to minimize pressure losses and the use of fan energy. Balancing dampers shall be provided at all branch connections and as necessary to balance the systems. Dampers and actuators, duct silencers, turning vanes, duct-mounted access doors, flexible connectors, and flexible ducts shall be provided, as required, for a complete design. All ductwork and accessories exposed to the outside air shall have additional corrosion protection.

2.5.3.8 Piping

Piping for heating hot water systems shall be constructed of Type “L” hard-drawn seamless copper with soldered fittings. HVAC piping shall be designed to minimize pressure losses and the use of pumping energy.

Isolation valves shall be provided at all main branch connections, major junctions, and as necessary to repair and service equipment. Automatic air vents shall be provided at all high points in piping systems, including coils.

Drain connections and valves shall be provided at all low points in piping systems, including coils.

Piping for refrigerant systems shall be Type ACR copper tubing with brazed fittings. Piping shall be sized per the equipment manufacturer’s requirements. Isolation valves shall be provided as necessary to repair and service equipment.

Hanger and support components should be provided in accordance with industry standards appropriate for supported loads. This includes but is not limited to mechanical anchor fasteners, heavy-duty steel trapezes, and structural steel stands to suspend equipment from the structure above or support equipment above the floor.

2.5.3.9 Insulation

All piping and ductwork that carries heated or cooled fluid or air shall be insulated to the more stringent requirement between the code requirements

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for the geographic location and ASHRAE 90.1. Additional insulation will be provided for any ducting or plumbing that needs sound isolation.

2.5.3.10 LEED Analysis

The building is comprised of conditioned (administration areas) and semi-heated spaces (maintenance shops and warehouses). The following shall be used to determine the Modeled Baseline Building requirements to be used for the LEED Credit EA1:

• Climate Zone 5A – Lucas County

• Conditioned Roof Maximum Assembly U-factor: 0.040 Btu/h-ft2-˚F

• Conditioned Roof Insulation Minimum: R-25.0 continuous insulation

• Conditioned Wall Maximum Assembly U-factor - 0.060Btu/h-ft2-˚F

• Conditioned Wall Insulation Minimum: R-16.6 continuous insulation

• Conditioned Windows Factors: U – 0.55, SHGC – 0.40

• Semi-heated Roof Maximum Assembly U-factor: 0.060 Btu/h-ft2-˚F

• Semi-heated Roof Insulation Minimum: R-16.6 continuous insulation

• Semi-heated Wall Maximum Assembly U-factor - 0.151 Btu/h-ft2-˚F

• Semi-heated Wall Insulation Minimum: R-12.5 continuous insulation

• Baseline HVAC System Type – System 3 – PSZ – AC

• Baseline System Description – Packaged rooftop air conditioner, constant volume fan control, direct expansion cooling, fossil fuel furnace heating

• Dry-bulb economizer with 70˚F High-Limit Shutoff

To obtain LEED Silver Certification, the building HVAC systems shall be designed to include the following as Sustainable Development:

• R-410a (non-CFC) refrigerant for all air conditioning equipment.

• Metering for domestic cold and hot water, gas and electricity.

• Outdoor air delivery measurement.

• Individual occupant control for administration areas.

• CO2 Sensors in densely occupied areas.

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2.5.3.11 EPACT Analysis

Carrier HAP v4.9 energy modeling software was utilized to perform preliminary energy modeling of the proposed building and an ASHRAE baseline building systems. The attached Air National Guard Sustainable Design and Energy Conservation Score Sheets demonstrate compliance with the Energy Policy Act 2005.

2.5.3.12 Geothermal Analysis

A geothermal system for heating and cooling using on-site renewable energy was considered as an alternate system for this facility. As part of this consideration energy modeling software Carrier HAP v4.7 was used to estimate the annual energy use of the proposed building system consisting of a Variable Air Volume Air Handler with Hot Water Reheat and a geothermal water source heat pump system. The same software is used to calculate the expected heating and cooling loads that the building will generate to size the HVAC equipment correctly. The program takes into account the building envelope, including wall insulation; window and roof construction; historical weather data for Toledo, Ohio; solar loads; and the position of the sun during each hour of each day; heat gain from people;

lights; and miscellaneous items, such as computers and efficiency of each piece of HVAC equipment.

The gas and electric utility rates were provided by Mr. Daniel Jones, USAF

ANG 180 FW/CEO.

An evaluation of the proposed system and alternate geothermal system using life cycle cost analysis was performed. The NIST BLCC 5.3-12 Life Cycle Cost program, methodology, and procedures were utilized and the reports are attached. The analysis includes initial capital investment cost, energy consumption cost, annual maintenance cost, and future replacement cost.

Description Proposed System Alternate

Geothermal System

Initial Cost $206,000 $255,640 Replacement Cost $63,010 $246,116 Annual Maintenance Cost $30,971 $33,525 Operating Cost (energy cost) $206,550 $187,682 Life Cycle Cost $475,560 $489,439 Discounted Payback -- 35 Years* Conclusion -- Not Cost Effective

* Discounted payback does not include the annual maintenance costs. Inclusion of the annual maintenance costs in the NIST BLCC 5.3-12 program increases the discounted payback to exceed the maximum 40-year life cycle cost evaluation period.

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Criteria Basis of Analysis Study Life 40 Years (maximum) Discount Rate 3.5% Cost of Electricity $0.0758 per KWH Cost of Natural Gas $0.71 per CCF

Installation costs were estimated based on RS MEANS 2013, equipment manufacturers, and past experience. It was discovered that the actual building equipment costs for the two systems are very similar. The only significant cost difference is in the installation of the well field.

The analysis indicates:

• Discounted payback is 35 years and is not cost effective.

• The energy cost savings and lesser replacement cost of geothermal system components did not offset the added capital investment costs.

There are other criteria to be considered:

• Due to a large number of heat pump units to be maintained, there is additional annual and routine maintenance associated with the geothermal system. This added maintenance cost increases the payback period.

• Additional noise that is inherent from water source heat pump compressors located within or above the spaces does not make sense for the programming of this building.

• The system would require a large outdoor footprint, site modifications, and would interfere with existing adjacent underground utilities.