200323_Design Narrative.pdf

Design Narrative_v2_02/03/22

Design Narrative

WWYK200323 - REPAIR HVAC DIFFUSER AND

DUCTWORK, B3001 POST P51-R59

Project Number: WWYK200323 Work Order: 23997

Tinker Air Force Base, Oklahoma

August 7, 2024

Prepared By:

TEPA

7535 5th Street, Building 400

Tinker AFB, OK 73145

WWYK200323 - REPAIR HVAC DIFFUSER AND DUCTWORK, B3001 POST P51-R59

August 7, 2024 | i

CONTENTS

1. Overview

2. Applicable Codes and Standards

2.1 General

2.2 Civil

2.3 Architectural

2.4 Structural

2.5 Mechanical / Plumbing

2.6 Electrical

2.7 Fire Protection

3. Mechanical Design Narrative

3.1 General Design Parameters and Assumptions

3.1.1 Elevation, Latitude/Longitude, Climate Zone

3.1.2 General Indoor Temperature/Relative Humidity Parameters

3.2 Indoor Air Quality

3.3 Life Cycle Cost Analysis (LCCA)

3.4 Demolition

3.4.1 Maintenance Area

3.5 Mechanical Construction

3.5.1 Air Distribution

3.5.2 Ductwork

3.5.3 System Commissioning, Testing and Balancing

4. Electrical Design Narrative

4.1 General Design Parameters and Assumptions:

4.2 Electrical Demolition

4.3 Electrical Construction

5. Fire Protection / Life Safety Design Narrative

5.1 General Design Parameters and Assumptions

5.1.1 Jurisdictional Authority

5.1.2 Fire Protection Approach

5.2 Building Use and Occupancy

5.2.1 Existing Occupancy Classification

5.2.2 New Occupancy Classification

5.3 Passive Fire Protection Features

5.3.1 Fire and Smoke Protection Features

5.3.2 Fire Department (Emergency) Vehicle Access

5.4 Fire Protection Systems

5.4.1 Automatic Sprinkler Protection

5.4.2 Fire Alarm / Mass Notification

ii | August 7, 2024

5.4.3 Impairment Coordination

5.5 Means of Egress

5.5.1 Arrangement of Means of Egress

5.5.2 Illumination of Means of Egress

5.5.3 Marking of Means of Egress

5.5.4 Egress Travel Distance

5.5.5 Egress Capacity

5.6 Safeguards During Construction

5.6.1 Hot Work

5.6.2 Fire Protection Impairment Supervision

APPENDICES

Appendix A: Acronyms and Abbreviations

Appendix B: Civil Calculations and Cutsheets

Appendix C: Architectural Calculations and Cutsheets

Appendix D: Structural Calculations and Cutsheets

Appendix E: Mechanical / Plumbing Calculations and Cutsheets

Appendix F: Electrical Calculations and Cutsheets

Appendix G: Fire Protection Calculations and Cutsheets

August 7, 2024 | 1

1. Overview Interior renovation of existing space. Replace corroded/rusted ductwork and diffusers overhead.

2. Applicable Codes and Standards

2.1 General

ICD/ICS 705 Technical Specifications for Construction and Management of Sensitive Compartmented Information Facilities

IBC International Building Code (as amended by UFC 1-200-01) IEBC International Existing Building Code NFPA 101 Life Safety Code TAFB Facility Standard UFC 1-200-01 General Building Requirements UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings UFC 4-010-05 Sensitive Compartmented Information Facilities Planning, Design, and Construction

2.2 Civil

FAA Advisory Circular 150/5340-1L BASH Manual UFC 3-201-01 Civil Engineering UFC 3-230-01 Water Storage, Distribution, and Transmission UFC 3-250-01 Pavement Design for Roads and Parking Areas UFC 3-260-01 Airfield and Heliport Planning and Design UFC 3-260-04 Airfield and Heliport Marking UFC 4-022-02 Security Fences and Gates

2.3 Architectural

ABA Architectural Barriers Act Standards UFC 3-101-01 Architecture UFC 3-110-03 Roofing UFC 3-120-10 Interior Design UFC 3-190-06 Protective Coatings and Paints UFC 3-201-02 Landscape Architecture

2.4 Structural

ACI 318-14 Building Code Requirements for Structural Concrete and Commentary

AISC 360-10 Steel Construction Manual, 14th Ed.

ASCE 7-10 Minimum Design Loads for Building and other Structures

2 | August 7, 2024

AISI S100-12 North American Specification for the Design of Cold-formed Steel Structural Members

UFC 3-301-01 Structural Engineering UFC 3-310-01 Seismic Design of Buildings

2.5 Mechanical / Plumbing

ANSI/ASHRAE/ Peak Cooling and Heating Load Calculations in Buildings Except ACCA Standard 183 Low-Rise Residential Buildings ASHRAE 55 Thermal Environmental Conditions for Human Occupancy ASHRAE 62.1 Ventilation for Acceptable Indoor Air Quality ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise Residential

Buildings IECC International Energy Conservation Code IMC International Mechanical Code (as amended by UFC 3-410-01) IPC International Plumbing Code (as amended by UFC 3-420-01) TAFB Mechanical Standard UFC 1-200-02 High Performance and Sustainable Building Requirements UFC 3-400-02 Design: Engineering Weather Data UFC 3-401-01 Mechanical Engineering UFC 3-410-01 Heating, Ventilating, and Air Conditioning Systems UFC 3-410-02 Direct Digital Control for HVAC and Other Building Control

Systems UFC 3-410-04 Industrial Ventilation UFC 3-420-01 Plumbing Systems UFC 3-430-01FA Heating and Cooling Distribution Systems UFC 3-450-01 Noise and Vibration Control

2.6 Electrical

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

NFPA 70 National Electrical Code NFPA 780 Standard for Installation of Lightning Protection Systems TAFB Electrical Standard UFC 3-501-01 Electrical Engineering UFC 3-520-01 Interior Electrical Systems UFC 3-530-01 Interior and Exterior Lighting Systems and Controls UFC 3-575-01 Lightning and Static Electricity Protection Systems

2.7 Fire Protection

NFPA 1 Fire Code NFPA 10 Standard for Portable Fire Extinguishers

August 7, 2024 | 3

NFPA 13 Standard for the Installation of Sprinkler Systems NFPA 51B Standard for Fire Prevention during Welding, Cutting, and Other

Hot Work NFPA 70 National Electric Code NFPA 72 National Fire Alarm Code NFPA 90A Standard for the Installation of Air-Conditioning and Ventilation

Systems NFPA 241 Standard for Safeguarding Construction, Alteration, and

Demolition Operations TAFB Mechanical Standard TAFB Electrical Standard TAFB Fire Protection Standard UFC 3-600-01 Fire Protection Engineering For Facilities UFC 3-601-02 Operation and Maintenance: Inspection, Testing and

Maintenance of Fire Protection Systems UFGS 07_84_00 Fire Stopping

August 7, 2024 | 1

3. Mechanical Design Narrative The project space within building 3001 is served by AHUs 26N and 26S. These units provide cooling and heating for the space below. The project area consists of PMXG F-135 mini mod shop. AHUs 26N and 26S serve surrounding areas as well.

The entire ductwork system has become rusted and is well beyond its life expectancy. Due to interior buildings having been built within B3001, many of supply diffusers have been removed and capped, or have been left blowing air on top of the interior building. The entire ductwork system needs to be redesigned and replaced. Consideration also needs to be taken for future addition/removal/relocation of interior buildings so the system can serve the space as it may change. The ductwork system should be flexible to add/adjust branch duct locations as needed for future space modifications.

3.1 General Design Parameters and Assumptions

3.1.1 Elevation, Latitude/Longitude, Climate Zone

Elevation, latitude/longitude, and climate zone were taken from International Energy Conservation Code 2015. Weather data below was taken from UFC 3-400-02 and 2013 ASHRAE Fundamentals Chapter 14.

Elevation: 1,260 ft.

Latitude: 35.42 N Longitude: 97.38 W Climate Zone: 3 Summer: 100°F DB/74°F WB Winter: 12°F

3.1.2 General Indoor Temperature/Relative Humidity Parameters

HVAC Design by Building Area

Area Designation

Design Temperature (°F) Relative Humidity (%)

Minimum Winter

Maximum Summer

Minimum Winter

Maximum Summer

Conference/Office 68 78 N/A 50

Classroom 68 78 N/A 50

Sleeping / Berthing 68* 78* N/A 50

Storage/Janitor Closet 68 78 N/A N/A

Mechanical Room 68 N/A N/A N/A

Electrical Room 40 78 N/A N/A

* Sleeping/Berthing areas are to be designed to maintain 68° - 78° F at all times.

3.2 Indoor Air Quality

Ventilation rates for all areas will be provided per ASHRAE 62.1-2016. Ventilation air will be provided by the existing air handling units.

2 | August 7, 2024

3.3 Life Cycle Cost Analysis (LCCA)

Modifying the mechanical equipment of this system is not part of the scope of this project, therefore a Life Cycle Cost Analysis was not performed for this project.

3.4 Demolition

Demolition includes but is not limited to the following:

3.4.1 Maintenance Area

Existing AHU ductwork and air devices will be removed and replaced with new. Fire prevention piping is located directly below the ductwork, and if it has to be removed and reinstalled, it will be disassembled and reassembled without any cutting, sawing, grinding or otherwise disturbance of the painted surface of the pipe due to lead based paint (LBP).

3.5 Mechanical Construction

3.5.1 Air Distribution

All new diffusers will be selected for minimum pressure drop, efficient throw, and minimal sound characteristics.

3.5.2 Ductwork

All ductwork will be rated for a minimum of +2” w.g. All supply ductwork will be provided with external wrap insulation. Fire, smoke, and combination fire/smoke dampers will be provided in new ductwork where needed as dictated by code. New duct sizes shall achieve flow rates that currently exist at existing registers. As-builts show these flow rates to be 4,400 cfm and 6,000 cfm.

3.5.3 System Commissioning, Testing and Balancing

Provide commissioning of work designed/constructed under this project. Also provide to a firm certified by the Associated Air Balance Council (AABC) or National Environmental Balancing Bureau (NEBB) to perform the testing, adjusting and balancing procedures of air side and water side systems per the requirements of the AABC or NEBB Procedural Standards for Testing, Adjusting and Balancing of Environmental Systems. The Contractor shall also perform a Duct Air Leakage Test (DALT) per UFGS 23 05 93.

August 7, 2024 | 3

4. Electrical Design Narrative

4.1 General Design Parameters and Assumptions:

The electrical requirements for the project include (but are not limited to):

Removal, cleaning, and replacement of existing LED light fixtures as required for the new duct and diffuser replacement. Replacement of air duct smoke detectors.

4.2 Electrical Demolition

4.2.1.1 De-energize any bridge-crane in the vicinity that impinges on the work area. Lock-out and tag-out the disconnect switches feeding the bridge-crane before starting the day’s work. Coordinate with shop for times that are suitable for both to operate without one impeding the other’s work. Power to the cranes shall be re-energized at the end of the work day.

4.2.1.2 Demolish duct smoke detectors after contacting Tinker Fire Department prior to their removal.

4.2.1.3 Disconnect power from selected light fixtures that would interfere with mechanical work. Lock-out tag-out the supply breakers to prevent accidental energization of the affected lighting circuits.

4.2.1.4 Remove and store selected light fixtures for re-installation.

4.3 Electrical Construction

4.3.1.1 Install new smoke detectors in air supply ducts and connect to existing power. Test to the satisfaction of Tinker AFB Fire Department.

4.3.1.2 After cleaning of stored light fixtures, re-install light fixtures.

4.3.1.3 Reconnect light fixtures to existing power and switches.

4.3.1.4 Upon completion of associated light fixture and air supply smoke detector work, remove lock-out tag-out from supply breakers and re-energize the affected circuits.

Also re-energize any bridge crane affected.

4.3.1.5 Inspect and test light fixtures and smoke detectors to ensure proper operation after mechanical work is finished.

4.3.1.6 Test bridge-cranes for proper operation and correct any deficiencies.

4.3.1.7 All electrical work shall conform to the most recent version of NFPA 70 (National Electrical Code) and Tinker AFB Electrical Standards.

5. Fire Protection / Life Safety Design Narrative The existing duct smoke detectors will be removed from the old HVAC units and new duct detectors will be installed on the new HVAC units and interfaced with the existing fire alarm system.

Additionally, sprinkler drops and sprinkler heads will be removed to allow for the demolition of the old HVAC ducts. The sprinkler drops will be reinstalled in the original locations after new ducts and VAV units are installed. New sprinkler heads and sprinkler drop piping having the same specifications as original sprinkler heads and piping will be installed.

4 | August 7, 2024

5.1 General Design Parameters and Assumptions

5.1.1 Jurisdictional Authority

The Contracting Officer and Base Fire Chief are the Authorities Having Jurisdiction (AHJs).

5.1.2 Fire Protection Approach

The fire protection and life safety systems design approach will follow UFC 1-200-01, UFC 3-600-01, Chapter 34, the International Building Code (IBC), the International Existing Building Code (IEBC) and NFPA 101 (Life Safety Code).

The scope of work is defined as a Level 1 Alteration per IEBC. Level 1 Alterations include the removal and replacement or the covering of existing materials, elements, equipment, or fixtures using new materials, elements, equipment, or fixtures that serve the same purpose. Per UFC 3- 600-01, this work is classified as a Renovation, defined as the replacement in kind, strengthening, or upgrading of building elements, materials, equipment, or fixtures, that does not result in a reconfiguration of the building spaces within.

In accordance with UFC 3-600-01 §34-1.2.1, the work in this existing facility shall conform to the Building Rehabilitation chapter of NFPA 101 for design and construction projects. Under NFPA 101 terms, this project would be classified as a Renovation. The work shall additionally adhere to UFC 3-600-01 §34-1.4.1, which states “All work must conform to the existing occupancy provisions of NFPA 101. The work must not make the building or occupancy less conforming with this UFC and NFPA 101 than before the Renovation project was undertaken.

5.2 Building Use and Occupancy

5.2.1 Existing Occupancy Classification

IBC - Building 3001 is a Mixed-Use/Non-Separated Occupancy building, having Assembly Group A-2, Assembly Group A-3, Business Group B, Moderate-Hazard Factory F-1, and Moderate Hazard Storage Group S-1 occupancies.

NFPA 101 - The building uses are classified as Existing Assembly, Existing Business, New Business, Special Industrial, and Storage.

The work area includes Group B (New Business Occupancy) occupancy classification.

The occupancy classification for Building 3001 will remain unchanged as a result of the scope of work associated with this project.

5.2.2 New Occupancy Classification

The occupancy will remain unchanged.

5.3 Passive Fire Protection Features

5.3.1 Fire and Smoke Protection Features

5.3.1.1 Penetration Requirements

All existing penetration protectives and sealants through fire and smoke rated barriers and walls shall be maintained. Any new penetrations into or through fire-and smoke rated barriers and walls shall be in accordance with IBC §714 only when IBC Chapter 5 or 6 specifically reference IBC chapter 7. All fire stopping will conform to UFGS 07_84_00 and TAFB Fire Protection Standards

August 7, 2024 | 5

5.3.1.2 Interior Finish

Interior finishes will not be affected by construction and will remain unchanged.

5.3.1.3 Fire and Smoke Dampers

The protection of duct penetrations through fire and smoke resistive rated construction shall be in accordance with NFPA 90A and IBC §717.

5.3.2 Fire Department (Emergency) Vehicle Access

Existing roads, parking lots and service drives are existing. The scope of work associated with this project will not affect the existing Fire Department Vehicle Access and will remain as is.

5.4 Fire Protection Systems

5.4.1 Automatic Sprinkler Protection

Automatic sprinkler protection is provided throughout Building 3001. Sprinkler protection is provided by a wet pipe sprinkler system. The sprinkler riser is located within the first floor Mechanical Room located within the northwest corner of the building.

5.4.1.1 Demolition

To allow for the demolition of HVAC duct work remove the existing sprinklers and associated drop piping back to the branch lines and install temporary caps/plugs as necessary to accommodate the renovation and the removal of the ceiling.

All other building area’s fire protection systems are to remain fully operational.

5.4.1.2 Construction

Provide new sprinkler drops to accommodate new sprinkler under the new duct work, where required by NFPA 13 section 9.5.5.3.

All other building area’s fire protection systems are to remain fully operational.

5.4.2 Fire Alarm / Mass Notification

The building is equipped with a Fire Control Instruments Model 72 conventional (Zoned) fire alarm system and a Gamewell E-3 Fire alarm and mass notification system.

The existing fire alarm systems is equipped with a Monaco BT-XF radio frequency transceiver allowing the fire alarm system to be monitored by the Monaco D-21 Base- Wide fire alarm monitoring system.

5.4.2.1 Demolition

Within the project area, remove the fire alarm notification devices, initiating devices cable, back boxes, conduit, hangers and fasteners that are required for the demolition of the mechanical ductwork. Pull all fire alarm cables back to the nearest fire alarm system device located outside of the work area and install jumpers and end of line devices required to maintain circuit integrity.

6 | August 7, 2024

5.4.2.2 Construction

Re-install fire alarm system notification devices and initiating devices removed during the demolition phase.

All other building area’s fire protection systems are to remain fully operational.

The rooftop HVAC are equipped with duct smoke detectors arranged to shut down their respective unit; they are monitored by the fire alarm system. New duct detectors shall be provided for the replacement HVAC units in accordance with UFC 3-600-01, NFPA 90A and NFPA

72. The duct detectors shall be connected to the existing fire alarm system and shall report as supervisory signals. Expansion modules shall be provided for the existing FACP, as may be necessary.

5.4.3 Impairment Coordination

The temporary removal and installation of sprinkler heads will require that the existing sprinkler systems be taken out of service. The impairment procedures detailed in UFC 3-601-02, Chapters 1-10 and 1-11 shall apply to all fire protection impairments. Careful impairment handling includes planning of work to limit impairments to a minimal time period. As sprinkler heads are removed for the day’s work, caps shall be installed on the open pipe ends to allow the sprinkler system to be returned to service. Building occupants shall be notified of fire protection impairments. Warning signs shall be placed at all principle employee and visitor entrances to the building during the impairment period. In certain cases the cessation of hazardous operations and the establishment of fire watch may be required.

5.5 Means of Egress

5.5.1 Arrangement of Means of Egress

The existing egress components (exit access corridors, exits and exit discharge) will remain unchanged at the conclusion of this project. Common Path and Egress Travel Distances for the work area are shown on the Life Safety Plan.

The building’s egress capacity remains unchanged.

The scope of work will not make the building less conforming than before the project is undertaken

5.5.2 Illumination of Means of Egress

Emergency lighting will be provided in accordance with NFPA 101 within the work area.

Emergency lighting for remaining building will not be affected by the scope or work related to this project and will remain as is.

5.5.3 Marking of Means of Egress

Illuminated and non-illuminated exit signs are provided for existing building areas and will not be affected by the scope or work related to this project and will remain as is.

5.5.4 Egress Travel Distance

The renovation will not alter egress and travel distances. The renovation work will not make the building less conforming with UFC 3-600-01 and NFPA 101 than before the renovation.

August 7, 2024 | 7

5.5.5 Egress Capacity

The renovation will not alter the building egress components. The renovation work will not make the building less conforming with UFC 3-600-01 and NFPA 101 than before the renovation.

5.6 Safeguards During Construction

All work associated with this project shall be performed in accordance with NFPA 241 Standard for Safeguarding Construction, Alteration, and Demolition Operations.

5.6.1 Hot Work

All Hot Work associated with demolition and construction shall be performed in accordance with NFPA 51. Safeguard for Hot Work operations include, but are not limited to the relocation of combustible storage, the use of fire resistive barriers to protect combustibles that cannot be relocated, the establishment of Fire Watch and the termination of hot work operations when fire protection systems are out of service. Additionally, Hot Work should not be performed when alternative methods can be employed to dismantle existing or assemble new systems.

5.6.2 Fire Protection Impairment Supervision

Fire protection impairments will be supervised and performed in accordance with UFC 3-601-02

Appendix A

Acronyms and Abbreviations

A Ampere(s)

AABC Associated Air Balance Council

ACCA Air Conditioning Contractors Association

ACI American Concrete Institute

ACS Access Control System

ACT Acoustic Ceiling Tile

AFB Air Force Base

AFF Above Finished Floor

AFI Air Force Instruction

AHJ Authorities Having Jurisdiction

AHU Air Handling Unit

AISC American Institute of Steel Construction

ANSI American National Standards Institute

ASCE American Society of Civil Engineers

ASHRAE American Society of Heating, Refrigeration and Air-Conditioning Engineers

ASTM American Society for Testing and Materials

BTHU British thermal unit

BUR Built-Up Roof

CAC Common Access Card

CBT Computer Based Training

CCTV Closed Circuit Television

CIPS Cyberspace Infrastructure Planning System

CMU Concrete Masonry Unit

COMM Communications

DB Dry Bulb

DoD Department of Defense

DX Direct Expansion

E East

EBI Enterprise Building Integrator

EMI Electromagnetic Interference

EMT Electrical Metallic Tubing

FCI Fire Control Instruments

FCU Fan Coil Unit iv | August 7, 2024

FF-L Federal Specification

FPS Feet Per Second

FT Feet

GSA General Services Administration

HR Hour(s)

HSS Hollow Structural Section

HVAC Heating, Ventilation and Air Conditioning

IAW In Accordance With

IBC International Building Code

IC Intelligence Community

ICD Intelligence Community Directive

ICS Intelligence Community Standard

IDS Intrusion Detection System

IEBC International Existing Building Code

IECC International Energy Conservation Code

IMC International Mechanical Code

IN Inches

IPC International Plumbing Code

IT Information Technology kVA Kilovolt-Ampere

LAN Local Area Network

LED Light Emitting Diode

MOD Motorized Damper

N North

NEBB National Environmental Balancing Bureau

NFPA National Fire Protection Association

NIPR Non-Secure Internet Protocol Router

PSF Pounds per Square Foot

RF Radio Frequency

RFI Radio-Frequency Interference

SIPR Secure Internet Protocol Router

SMACNA Sheet Metal and Air Conditioning Contractors' National Association

S South

STC Sound Transmission Class

TAFB Tinker Air Force Base

UFC Unified Facilities Criteria

UPS Uninterruptible Power Supply

V Volts

VAV Variable Air Volume

W West

WB Wet Bulb

WG Water Gauge

§ Subsection

°F Fahrenheit

Appendix B

Civil Calculations and Cutsheets

Appendix C

Architectural Calculations and Cutsheets

Appendix D

Structural Calculations and Cutsheets

Appendix E

Mechanical / Plumbing Calculations and Cutsheets

Appendix F

Electrical Calculations and Cutsheets

Appendix G

Fire Protection Calculations and Cutsheets