Attachment 4 Design Narrative Repair Aircraft Maint Hangar Fire Systems B700.pdf

100% DESIGN NARRATIVE

REPAIR AIRCRAFT

MAINTENANCE HANGAR FIRE

SYSTEMS,

BUILDING 700

AT

JOINT BASE CHARLESTON – AIR BASE WING,

SOUTH CAROLINA

PROJECT No.: 1051184 TWCF (Legacy project number DKFX 11-1171)

SUBMITTAL DATE: January 29, 2021

ARCHITECTURE / PLANNING / INTERIOR DESIGN

493 King Street, Suite 100 Charleston, South Carolina 29403 Telephone: 843.577.6377 / Fax: 843.722.1768 Internet: www.gbaarchitecture.com GBA Project No.: 2003

Repair Hanger Fire Sysystems, Bldg. 700 100% Submittal Joint Base Charleston – Air Wing Base

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Project Design Team

Architect: Glick/Boehm & Associates, Inc.

493 King Street, Suite 100 Charleston, South Carolina 29403 843.577.6377

Mechanical / Plumbing / DWG Consulting Engineers, Inc.

Electrical Consultant: 1009 Anna Knapp Blvd., Suite 202 Mt. Pleasant, South Carolina 29464 843.849.1141

Cost Consultant: Aiken Cost Consultants 1010 East North Street, Suite C-2 Greenville, South Carolina 29601 864.232.9342

Table of Contents

Mechanical Narrative 3

Electrical Narrative 6

Fire Protection Narrative 10

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MECHANICAL

Design Guidance, Codes, Standards

The following criteria, latest editions shall be used in the design of this project:

JBC (AB) Mechanical Engineering Project Requirements JBC (AB) Shop Mechanical Requirements JBC (AB) EMCS Requirements/Definitions MIL-HDBK-1190 Military Handbook Facility Planning & Design Guide.

MIL-HDBK-1003/3

IMC 2018 International Mechanical Code UFC 3-400-02 Engineering Weather Data, 20 September 2018 UFC 3-410-01 Heating, Ventilating, and Air Conditioning Systems, Change 6, 20 March 2020 American Society of Heating, Refrigeration & Air Conditioning Engineers (ASHRAE), Standards Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA), Inc. (Latest Edition).

NFPA 90A – Installation of Air Conditioning & Ventilating Systems NFPA 90B – Installation of Warm Air Heating & Air Conditioning Systems

Introduction

Building 700 is a fully sprinkled, 96,000 square foot aircraft maintenance facility, built in 1970.

A 7,000 square foot administration addition has been added on one side of the hangar with offices, Tool Room, Men’s and Women’s Group Toilets, Break Room, Conference Room, Small Mechanical Room and Boiler Room. Additionally, a two-story Coordinators Shack and a single-story Sheet Metal Shop are semi-permanent structures within the hangar proper.

Mechanical Scope

The mechanical scope for this project consists of visiting the site and determining what changes are required to the mechanical system to ensure that the facility will comply with UFC requirements pertaining to the fire alarm system with mass notification.

Existing HVAC System

The existing HVAC unit that conditions Foam Room 12 that contains the fire alarm panel and miscellaneous associated equipment is a 1-1/2-ton Mitsubishi shown in the pictures on the following page.

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Figure 1 – Indoor Air Handler

Figure 2 – Outdoor Heat Pump

The government has reported that this unit is no longer working and therefore it should be demolished in its entirety. The exterior equipment pad shall remain for re-use.

Proposed HVAC System

The proposed HVAC system for the Foam Room would be a 2-ton ductless split system unit.

New refrigerant and condensate piping shall be provided. Exterior insulation shall be covered with an aluminum jacket to prevent UV degradation. The condensate piping shall be insulated as well.

Exterior wall penetrations shall be completely sealed to prevent infiltration of outside air and meet the 1-hour rating of the wall.

The indoor air handling and outdoor heat pump units shall both be seismically restrained.

A temperature sensor shall be provided for the Foam Room that is tied into the existing energy management system so that this system can be monitored. An alarm condition shall be created if the temperature in the room exceeds 90F or is below 50F.

HVAC Systems Design

Loads for heating and cooling will be calculated using an approved Energy Analysis Program.

The following design conditions will be used.

HVAC Design Conditions Outdoor Conditions:

Heating Season: 25 deg. F Dry Bulb Cooling Season: 95 deg. F Dry Bulb. 80 deg. F Wet Bulb Indoor Conditions:

Occupied Spaces: Summer: 78 degrees F, 50 percent RH. Winter: 68 degrees F.

General Requirements

Identification for HVAC Piping and Equipment:

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All equipment shall have plastic engraved nameplates installed that correspond to name on drawings. All piping shall be identified with pipe markers indicating type of service and associated system.

HVAC Piping Insulation Condensate piping shall be insulated with 1” closed cell insulation.

Refrigerant suction piping shall be insulated with 1” closed cell foam. The exterior refrigerant lines shall be covered with an aluminum jacket.

Noise/Vibration/Seismic Restraints Seismic bracing and vibration isolation shall be provided for all equipment per the 2018 International Building Code in accordance with Chapter 16. All items shall be braced to an Ip = 1.0.

Testing, Adjusting, and Balancing Systems will be tested, adjusted, and balanced to achieve proper operation.

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ELECTRICAL

General

Design Guidance, Codes, Standards:

NFPA 70 National Electrical Code, latest edition NFPA 72 National Fire Alarm Code, latest edition ICC International Code Series, latest edition UFC 3-501-01 Electrical Engineering, Change 1, 01 November 2019 UFC 3-520-01 Interior Electrical System, Change 1, 03 March 2019 UFC 3-600-01 Fire Protection Engineering for Facilities UFC 4-021-01 Design and O&M: Mass Notification Systems, Change 1, 01 January 2010 UFC 4-211-01 Aircraft Maintenance Hangars, Change 1, 01 November 2017 UFGS 28 31 76 JB CHS Interior Fire Alarm and Mass Notification System Specifications JBC-CHS-AFB Shop Mechanical Requirements Report Preliminary Hangar 700 Installation Report (AFCEC-TR-14-CHS700)

Introduction

Building 700 is a fully sprinkled, 96,000 square foot aircraft maintenance facility, built in 1970.

A 7,000 square foot administration addition has been added on one side of the hangar with offices, Tool Room, Men’s and Women’s Group Toilets, Break Room, Conference Room, Small Mechanical Room and Boiler Room. Additionally, a two-story Coordinators Shack and a single-story Sheet Metal Shop are semi-permanent structures within the hangar proper.

Electrical Scope

The scope for this project is to visit the site and determine the type of work required considering existing field conditions to develop the design for the upgrade / repair of the fire alarm system.

The fire alarm system requires upgrade to a point-to-point fire detection and mass notification system.

The electrical system shall also be modified as required to support any changes to the existing fire suppression foam system and HVAC systems.

The modifications necessary for this project shall be made to an existing JBC-AB B700 renovation design package (DKFX 11-1171, 27 July 2017) and identified as such so that all work associated with the upgrades be part of a separate CLIN.

Existing Fire Alarm System

The existing fire alarm system consists of a Monaco M-2 Panel connected to fire alarm strobes and initiation devices throughout the facility and serves as the fire alarm panel. The M-2 Panel is connected to a radio antenna that is believed to be located on the roof (based on tracing conduit). Figure 1 There are minimal initiation and notification devices connected to the panel currently. The following page describes the location of devices within the spaces. (Not all spaces were accessible at the time of the visit)

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Figure 1 – Monaco M-2 Panel

Figure 2 – Monaco Battery and NAC Panels

The hangar proper has pull stations at six exterior exits and six wall mounted horn strobes.

There’s a single pull station located in Boiler Room 10; a single horn strobe in Men’s Restroom 9, Conference Room 8, Break Room 7, Women’s Restroom 6, Tool Room 4, and in the three rooms of the Coordinator Shack. All of these devices shall be demolished.

There is likely a single horn strobe in Flight Leadership 2, Sections Chiefs 3 and Sheet Metal Shop 14 that will need to be demolished as well, but there was no access to those spaces.

The occupied spaces also contain a smoke detector that shall be demolished. Pull stations are also located on exterior doors leading from the Conference Room 8, Break Room 7, Tool Room 4 and Flight Leadership 2 and shall be demolished.

A Simplex 4010 system serves as the control unit for the Foam Suppression system as pictured in Figure 3. There are multiple Start and Stop Foam System stations located throughout the perimeter of the hangar near the risers as shown in Figure 4 on the following page. Each station has a start and stop function. These stations do not meet the current UFC requirements so they will be replaced as detailed in the Fire Protection portion of the report.

Tamper and flow switches are also located at each of the fire suppression risers. These will need to be replaced/re-integrated into the new Mass Notification system.

The design documents shall also require that the Fire Protection contractor survey each fire detection / fire suppression device that is not being replaced and evaluate its condition. A line item cost shall be provided for those devices that require replacement.

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Figure 3 – Foam Suppression Panel

Figure 4 – Foam Suppression Station

New Fire Alarm / Mass Notification System

The existing M-2 panel shall be replaced with a Monaco point to point fire alarm and mass notification panel (Monaco MAAP-X). This panel shall be configured to be fully compatible with the JBC Central Station Monaco D-21.

New devices, including but not limited to, wall and ceiling mounted amber mass notification strobes, wall and ceiling mounted clear fire strobes, Mass Notification Local Operating Consoles (LOC), pull stations, tamper and flow switches and ceiling mounted mass notification cluster speakers shall be located throughout the facility to meet the UFC and Hangar design guidelines.

The existing foam suppression controller shall be replaced with a new Det-Tronics Eagle Quantum Premier Fire Detection/Releasing system. The panel shall be furnished complete with Safety Systems Software (S3) configuration/logic programming/diagnostic tools software package including USB dongle key and RS232 cable. Additional requirements for the FSCP have been added to the project specifications.

Blue strobes, indicating foam release associated with the system activation are existing but need to have signage added. This information is provided on the contract drawings.

Optical flame detectors have also been added to the project. The optical flame detectors shall be the X3301 Multispectrum IR Flame Detector manufactured by Det-Tronics. Proposed locations have been added to the systems plan, but the contractor is responsible for coordinating exact location drawings from the manufacturer.

Duct mounted smoke detectors shall be added to the system when airflows exceed 2,000 cfm. At this point in the design, that would include the (8) Unit Heaters serving the hangar and a future air handling unit.

General Fire Alarm/Mass Notification Requirements

The contractor shall perform a pre-test and final test of each of the fire alarm systems and certify upon completion of work. Documentation of each test shall be provided to the JBC Air Base Fire Services Department and the JBC Air Base Alarm Shop.

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Any work associated with this system shall be fully coordinated with the JBC AFB Fire Services Department.

The transmission of coded radio signals to the D-21 central station shall include the following:

1. Permanent record of alarm signal.

2. Time and date of alarm signal.

3. Automatic supervision of alarm initiating circuits

4. Automatic transmission of signals

5. Automatic testing of radio signaling devices

The new fire alarm mass notification system shall be provided with the following:

1. Battery back-up power supply

2. Surge suppressor installed on the fire alarm lightning arrestor

3. Fully addressable devices

After the system has been completed, training on the new system shall be provided for members of the JBC Air Base Fire Services Department, Fire Alarm Shop and Owner’s Representative.

Training must meet all requirements of the UFC including but not limited to procedures for Operation and Maintenance of the systems as well as procedures for shutting down the fire alarm, mass notification and foam suppression systems.

Items specific to coordination between the Joint Base Charleston Mass Notification Specifications and the UFC Specifications include the following requirements:

1. Fire alarm and mass notification shall have 48 hours of standby on batteries with 15 minutes of alarm.

2. Fire alarm wiring shall be Class B configuration.

3. All buildings shall have a close out as-built stamped by a fire protection PE with a minimum of 4 years’ experience.

Start/Stop Stations

The existing Start and Stop Foam System Boards do not meet the UFC requirements as these functions need to be separated and not on the same wall mounted board. UFC 4-211-01 section 5-6.7.5 requires that all 13 existing start/stop stations with tamper proof covers be removed and reinstalled with signage and ¾” conduit configuration in accordance with UFC 4-211-01 section 3-6.19.8. The existing conduit enters the stations from the top, and the UFC requires that it enter from the bottom. The conduit for the new stations shall connect from the bottom with drain fittings in accordance with this requirement. The existing start/stop stations are sharing the same sign and in some locations are adjacent to a general fire alarm pull station. Where on the same sign as of an exit door as the general fire alarm pull station, the start and stop stations shall be relocated to the opposite side of the exit door. All 13 stop stations shall be relocated no further than 12 inches from the start station sign, but far enough away that it can have its own sign separate from the start station sign. 13 new start signs and 13 new stop signs shall be provided in accordance with the UFC requirements.

Additionally, the stations’ functions shall be reprogrammed. The start stations shall be programmed to release the foam for that zone, and the sign shall be labeled indicating which zone is served. The stop stations shall be reprogrammed to stop the discharge of the foam system regardless of whether or not the system was activated automatically or manually, and whether or not the activation occurs prior to or after the stop station is pressed and held. The stop stations

Page 10 | 12 shall be programmed to simultaneously stop the foam discharge from all zones. Unless the releasing system fire alarm control unit has been reset and all activation alarms have been cleared, the foam system operation shall be restored when the stop button is released. The flow control valve shall fully close in 15 seconds or less when the stop button is pressed under full flow. When the button is released, the flow control valve shall fully open in 5 seconds or less, where the system is still in alarm.

Miscellaneous Electrical Requirements

Fixed temperature sensors shall be provided throughout the hanger and the foam room to alarm the fire alarm control panel if the temperature drops below freezing. These sensors shall also alarm the energy management system per UFC 4-211-01 section 3-6.15.3.1.

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Fire Protection

Design Guidance, Codes, Standards:

Report 15 Jan 2016 Preliminary Hangar 700 Installation Report (AFCEC-TR-14-

CHS700)

AFI 32-10141 5 Feb. 2019 Planning and Programming Fire Safety Deficiency Correction

Projects UFC 3-600-01 7 Feb 2020 Fire Protection Engineering for Facilities UFC 3-601-02 8 Sep 2010 Operation and Maintenance: Inspection, Testing, and

Maintenance of Fire Protection Systems UFC 4-211-01 1 Nov 2017 Aircraft Maintenance Hangars NFPA 1 2018 Fire Code NPFA 13 2019 Standard for the Installation of Sprinkler Systems NPFA 16 2019 Standard for the Installation of Foam-Water Sprinkler and

Foam-Water Spray Systems NFPA 101 2018 Life Safety Code

General Information

Building 700 is a 96,075 total square foot aircraft maintenance facility built in 1970, and includes a 7K square foot one-story portion used for administrative purposes. All areas are protected with an automatic wet-pipe sprinkler system with 14 risers in the hangar and 2 risers for the one-story portions attached to the south end of the building. In addition, an existing high expansion foam system protects aircraft parked in the bay with 3 risers. These systems were last renovated in 2014, and were inspected in the same year leading to an evaluation report. This project seeks to remedy the deficiencies listed in the report to return the system to fully automatic system operation and meet the reliability requirements to prevent inadvertent activations in accordance with AFCEC guidance.

Fire Protection Scope

UFC 4-211-01 section 5-6.7 “Assessment of Existing Fire Protection Systems” addresses three minimum reliability corrections to existing high expansion foam systems: triple IR flame detection and control, pressurized foam bladder tanks, and start/stop stations, which are addressed in the Electrical section. Additionally, UFC 4-211-01 requires that deficiencies reported in the individual hangar evaluation report be repaired “to restore the existing system without altering its original design.”

Triple IR Flame Detection and Controls

UFC 4-211-01 section 5-6.7.5 requires providing triple IR flame detection and controls as the releasing method for all existing high expansion foam systems, along with the manual foam releasing station, in accordance with UFC 4-211-01 section 3-6.19.11. According to the 2007 as-builts, the existing high expansion foam system is activated by any one of the following: water flow switch in the wet pipe automatic sprinkler system riser, ceiling mounted cross zoned heat detectors, or manual pull stations. The first two of these activation methods are prohibited by the

UFC.

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Triple IR optical flame detectors listed/approved for the expected fuel hazards shall be installed around the perimeter of the hangar bay approximately 8ft above finished floor. Detectors shall be immune to radar and radio frequency emissions from hand held equipment or equipment on-board the aircraft. Spacing, quantity and location will be evaluated in accordance with UFC 4- 211-01 section 3-6.19.11.2. The controls will be modified such that the foam system will be activated by two simultaneous optical flame detectors or a manual pull station.

Pressurized Foam Bladder Tanks

It was evaluated whether the existing bladder tank could be replaced with an atmospheric concentrate tank with a new inductor system; however, JBC gave the directive not to make those modifications, but to proceed with modifications described herein.

UFC 4-211-01 section 5-6.7.8 requires that the bladder pressurization piping be reconfigured so the bladder is not under constant pressure. The evaluation report also notes that the existing foam concentrate system is under constant pressure and needs to be corrected. The existing 3” piping to the 800 gallon storage tank shall be disconnected and reconnected downstream of each of the three existing deluge valves to pressurize the bladder tank only when the system activates.

Additional Deficiencies

The evaluation report and Statement of Work note additional deficiencies that the contractor shall remedy:

A pressure relief trim device shall be added to all 16 wet-pipe risers above the existing alarm valve. Since the time of the evaluation report, these have already been installed.

All 16 existing wet-pipe risers shall be tested to verify activation of flow switch and alarm system. New riser tags shall be provided for each riser.

All 3 foam system risers shall be tested to verify activation of deluge valve and alarm system. New riser tags shall be provided.

All supervisory switches and monitor circuits in all wet-pipe and foam systems shall be tested. New valve tags shall be provided.

All wet-pipe risers and accessories shall be inspected and proper function confirmed.

Replace any components that fail the inspection.

Replace all 14 existing expansion tanks on wet-pipe risers in hangar with minimum 10 gallon surge arrestors. Since the time of the evaluation report, these have already been installed.

Existing surge arrestors for foam/water systems are shown on as-builts as a minimum of 10 gallons. UFC 4-211-01 section 3-6.5.2 requires a minimum of 25 gallon for each foam/water riser. Surge arrestors will be replaced with a minimum 25 gallon capacity.

A 10” basket strainer with a stainless steel mesh no greater than ¼ inch shall be provided on the foam/water riser manifold in accordance with UFC 4-211-01 section 3-6.8.3.

Existing foam generators shall be relocated so foam will not fall directly on aircraft.

The existing deluge valves shall be replaced with flow control valves with remote reset capability in accordance with UFC 4-211-01 section 3-6.9.