ATT5-B1630_Basis_of_Design_-_Addition_Renovation.pdf

Addition/Renovation of 301ST Life Support Building 1630 Project DDPM 120002A/B

Naval Air Station, Fort Worth Joint Reserve Base, TX Contract Number: FA6643-10-D-0002

Task Order: 5D03

P 843 875 3637 F 843 875 4509 www.cemsengineering.com

PO Box 1680 1

3509 Iron Horse Drive Ladson, SC 29456

Basis of Design (BoD)

Civil Design Narrative

Building 1630 stands on a site at the intersection of G Street and Carswell Avenue.

Concrete parking lots, set back from the building, exist on three sides linked to entrances via concrete walks. Grassed areas slope gently away from the building footprint and various utilities and equipment (with pads) exist surrounding the building.

Between the Southern parking lot and the building, a line of large rocks stand in a line parallel to the existing Southern building face.

The proposed building expansion shall protrude from the existing Southern building face and extend southward. In addition, new canopied entrances shall be constructed at entrance locations, selectively. Expansion shall require removal and/or reconfiguration of existing site works within the footprint of the new structure (see site demolition and improvements drawings for reference):

Concrete walks, equipment pads and base material.

Landscape items including two trees.

Large rock impediments.

Southern asphalt parking lot (multiple stalls), base material, and wheel stops.

Natural gas main, building service, and metering equipment. Note: per as-built drawings and installation GIS information, the main is 2 1/2” and existing building service size is currently unknown.

Communication and electrical items (see electrical narrative for additional information).

Sprinklered fire protection coverage is needed within the building. A new 6” fire line, tapped from a nearby main with post indicator valve, shall be placed in order to service the building. A yard area siamese-style Fire Department Connection shall be provided.

Stormwater mitigation measures shall be required due to the amount of land disturbance (5000+ SF overall) and addition of impervious surface between pre- and post-development. In order to comply with Section 438 of the Energy Independence and Security Act (2007) and mandates of LID (low impact development), selective pavement areas shall be removed and replaced with grass resulting in no net increase of impervious area.

New building downspouts will splash down to finish grade, ultimately conveyed to the existing drainage system. Best management practices will be used for Erosion and Sediment Control and will include the installation of sediment and measures indicated in

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3509 Iron Horse Drive Ladson, SC 29456 the design drawings. The project construction sequence will begin with the installation of all sediment trapping devices before proceeding with site demolition and construction.

Once construction has been completed, all disturbed areas shall be permanently seeded with grass after all work is complete.

A Stormwater Prevention and Pollution Plan (SWPPP) will be required in accordance with EPA/NPDES requirements, and drainage design will be completed to comply with the requirements of Section 438 of the Energy Independence and Security Act (2007).

Site References

UFC 3-430-09 Natural Gas Supply and Distribution UFC 3-230-10A Water supply: Water Distribution UFC 3-210-02 POV Site Circulation and Parking

UFC 3-250-18 General Provisions: Geometric Design for Roads, Streets, Walks, and Open Storage Areas.

UFC 3-210-10 Low Impact Development (LID)

Manual on Uniform Traffic Control Devices (MUTCD)

Environmental Protection Agency (EPA): National Pollutant Discharge Elimination

System (NPDES)

Section 438 of the Energy Independence and Security Act of 2007 (EISA)

Architectural Design Narrative

General

For additional information not shown, refer to the Meeting Minutes and Investigatory

Field Report sections of the 10% submittal.

The project consists of two main portions; a 2,304 sf addition to the existing Building

1630 and a renovation of 6,408 sf of the existing facilities to meet the needs of the

Fighter Squadron Life Support operations.

Building 1630 has had two major previous additions. Addition 1 added a mechanical room to the side of the building. Addition 2 added a metal storage to the side of the building.

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3509 Iron Horse Drive Ladson, SC 29456

New Addition

The new addition will support the parachute packing operations and the flight gear lockers and will be compatible with the existing building. The design team will utilize similar materials to provide a seamless transition between the new and existing facility.

During the 10% design review meeting it was discussed and direction was provided to remove the existing finishing system from all the building and replace it with new one.

Renovation of Existing Facilities

The renovation of the existing building includes the repair/replacement of all lighting, ceiling, flooring, cabinetry, interior doors, and wall finishes, as well as reconfiguration of the rooms to accommodate the proposed areas. The existing restrooms will be renovated and expanded and will include new interior finishes, fixtures, accessories, and partitions. The relocation of the rooms will be coordinated with the end user and validated by the engineering department.

Original Building

Addition 1 Addition 2

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3509 Iron Horse Drive Ladson, SC 29456

During the 10% design review meeting the end user requested that additional urinal stalls be added to one of the unisex restrooms. This was achieved by shifting the printing station towards the left and reduce its size.

Construction Timeline

The existing facility will be vacated during construction in order to allow the new construction and renovation to take place.

Before New Addition

Proposed New Building Addition

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Programming

The following is an account of the proposed spaces and their square footage. This was determined during the field investigation where the requirements of each room was discussed.

ROOM NAME AREA (SF)

AFE LOCKERS 2,434

TRAINING 583

MOBILITY & STORAGE 329

FLOAT/GLUE/TALC 203

SURVIVAL EQUIPMENT 1295

SEWING with SURVIVAL 0

KIT/VEST ROOM 288

ACDE 225

NVG/HMIT 157

OFFICE 286

OPEN OFFICE 586

OFFICE 94

OFFICE 100

PRINTING STATION 122

LOCKER ROOM 194

BREAK ROOM 244

MEN'S RR 182

MEN’S RR 101

UNISEX RR 62

MECHANICAL ROOM 135

COMMUNICATION 102

ELCTRICAL ROOM 86

CIRCULATION 434

NET AREA 8,245

GROSS AREA 9,062

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Construction Systems

The following construction systems will be modified or used for the new addition and/ or the existing remodel.

Roofing System

The existing roof 22 gauge standing seam metal roof will be replaced in its entirety. See

Figure 1 below. The existing roof slopes without addition 2 are shown. Addition 2 has a low slope roof. (See Photo 2).

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3509 Iron Horse Drive Ladson, SC 29456

The exterior roof will have a minimum R-value of 20 providing continuous insulation. As the basis of design the following detail is being followed. The new addition won’t have purlins and the roof will be supported entirely from the metal deck to the main structure.

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Exterior Wall

The exterior of the original building and addition 1 is constructed of masonry with an

EIFS finish. (See Photo 1) The exterior of addition 2 consists of a pre-engineered building with metal panels as siding. (See Photo 2).

Photo 1: Exterior of original building.

Photo 2: Exterior of Addition 2

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3509 Iron Horse Drive Ladson, SC 29456

The existing mechanical roof will be removed, in order to accommodate the structure of the new addition and provide a seamless transition. See images below.

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3509 Iron Horse Drive Ladson, SC 29456

The new exterior walls will be constructed of 8” CMU with a stucco finish and an interior stud framing wrapped in gypsum board with insulation. R value of this wall shall be studied and determined based on it compliance with the Energy Usage Criteria for

Facilities in the Military Construction Program.

The following detail is being used as the basis of design based on the required minimum R-Value of 20.5.

Interior Wall System

The interior walls for the new addition and renovation will be metal stud framing with gypsum board layer. The studs on a typical wall will be 3 5/8” wide. No fire rated wall were identified per life safety analysis.

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Openings

The exterior doors will be hollow metal doors and steel frames. Doors will be thermally insulated and maximum duty. Exterior doors shall have dead bolt panic hardware with nonferrous thresholds. A keyless entry system will be installed and connected to the advantor intrusion detection system. All interior doors will be replaced with solid core wood doors. All existing door hardware will be replaced. Two existing roll-up door at the building will be removed and replaced with a new roll up doors.

Furniture, Fixtures, and Equipment

An FFE package will be developed and coordinated with the interior design package.

The color scheme will take into consideration the existing furniture that will be re-used in the facility. The existing stainless steel appliances will be re-used in this facility.

A detail survey of the existing equipment that is to be reused was done in order to ensure that the size of the rooms being proposed were adequate (see the Investigatory

Field Report).

See drawings I-102 for furniture location and schedule.

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3509 Iron Horse Drive Ladson, SC 29456

Interior Finishes

All materials and finishes proposed will be selected keeping in mind durability and ease of maintenance. The selection will be done on commercially standard materials. The walls for the interior will be textured and painted in a color that matches the interior. A rubber cove base will be used throughout the facility. The floor for the facility will be polished concrete, carpet and tile depending on the room (see below).

ROOM NAME FLOOR CEILING

AFE LOCKERS POLISHED CONC ACOUSTICAL TILE

TRAINING

POLISHED CONC/

RUBBER FLOORING

ACOUSTICAL TILE

&/ OR GYPSUM BD

MOBILITY &

STORAGE

POLISHED CONC

ACOUSTICAL TILE

FLOAT/GLUE/TALC CARPET ACOUSTICAL TILE

SURVIVAL

EQUIPMENT

POLISHED CONC

ACOUSTICAL TILE

SEWING POLISHED CONC ACOUSTICAL TILE

KIT/VEST ROOM CARPET ACOUSTICAL TILE

ACDE CARPET ACOUSTICAL TILE

NVG/HMIT POLISHED CONC ACOUSTICAL TILE

OFFICE CARPET ACOUSTICAL TILE

OPEN OFFICE CARPET ACOUSTICAL TILE

OFFICE CARPET ACOUSTICAL TILE

OFFICE CARPET ACOUSTICAL TILE

PRINTING STATION CARPET ACOUSTICAL TILE

LOCKER ROOM CARPET ACOUSTICAL TILE

BREAK ROOM TILE ACOUSTICAL TILE

MEN'S RR TILE GYPSUM BD

UNISEX RR TILE GYPSUM BD

UNISEX RR TILE GYPSUM BD

MECHANICAL

ROOM CONC

GYPSUM BD

COMMUNICATION

ROOM CONC

GYPSUM BD

ELECTRICAL ROOM CONC GYPSUM BD

CIRCULATION CARPET ACOUSTICAL TILE

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Structural Design Narrative

Design Parameters per IBC 2012, ASCE 07-10, UFC 3-301-01, UFC 4-010-01

Roof Live Load: 20 PSF Ground Snow Load: 5 PSF Minimum Roof Snow Load: 5 PSF (ASCE 7-10, Sect. 7.3.4) Soil Bearing Pressure: 2,000 PSF (Per Geotechnical Report)

Wind:

Occupancy Category – II 115 MPH (3 sec. Gust) Exposure C

Seismic:

Importance Factor, Ie = 1.00 Risk Category – II Site Class: C (Per Geotechnical Report) SDS = 0.072g SD1 = 0.057g Seismic Design Category: A

Project Overview and Design

Existing Building

The below descriptions of the existing building were gathered through review of the as-built drawings and through non-destructive site investigations.

The existing 301st Life Support Building 1630 was originally designed and constructed in 1942 and has had many renovations and a few small additions throughout its life. The original facility was 98’-8” x 52’-3” with a superstructure built of 8” steel columns supporting steel trusses (consisting of steel angles, channels, and gusset plates).

There are 6 of these steel frames creating 5 bays. The 3 interior bays are spaced at 20’-0” on center and the two end bays are spaced at 18’-4” creating two gable ends.

With an existing roof pitch of 4/12 and an eave height of approximately 11’, a ridge height of approximately 20’ is created. The trusses originally supported 2-2x12 wood purlins spaced at approximately 50” on center that were bolted to steel clips that were welded to the truss top chord. At some unknown point during one of the renovations, light gauge Z-purlins and anchor clips have been added between the wood 2-2x12’s at

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3509 Iron Horse Drive Ladson, SC 29456 approximately 50” on center creating purlins of alternating materials spaced at approximately 25” on center.

The exterior walls are noted as “8” tile walls” in the 1942 as-built drawings. The original masonry blocks are similar to typical CMU but have nominal dimensions of 8” wide, 5” high, and 12” long with two cells. These walls do not appear to be reinforced vertically or horizontally. These walls are continuous and bypass the outside of the aforementioned steel columns. The masonry is anchored to the steel columns with ½” diameter bent clip anchors spaced at approximately 21” on center. This is a deviation from the as-built drawings which show these anchors spaced at 16” on center. The gable end masonry walls that extend to the bottom of the existing 4’+/- tall triangular attic louver at each peak contain (2) 30” by 16” pilasters approximately 19’ apart and centered on the wall for out-of-plane bracing.

The existing substructure is constructed of continuous 8” wide concrete foundation walls on 20” wide strip footings supporting the 8” masonry walls. This continuous foundation is integrated with the 24”x24” concrete piers and 36”x36” spread footings that support the steel columns. The top of the concrete foundation walls and piers are approximately 4” to 6” above grade and the bottom of the footings extend approximately 24” below grade. The columns have 10”x10”x 1¼” baseplates atop ¾” of grout that are bolted into the piers with (2) 1”x18” anchor bolts. The floor slab of the remainder of the building is constructed of a 6” concrete slab on grade with expansion joints at the foundation wall/pier interface.

There were two additions to the original structure, both to the northwest side of the structure.

1. A mechanical room measuring approximately 12’x31’ was constructed in the early 1950’s. Unreinforced, 8” CMU walls support wood framed trusses. These CMU walls are supported on what appears to be a concrete foundation wall that matches the 1942 construction. CEMS does not have accurate as-built drawings of this addition and did not dig to verify the foundation so this is assumed.

2. Between 1989 and 2007, a 60’x14’ pre-engineered “lean-to” metal building was added. The steel frames provide a low slope roof (sloping approximately from 11’ AFF to 10’-7” AFF). The addition is supported by what is assumed to be a monolithic thickened slab on grade. Again, CEMS does not have as-built drawings of this addition.

Renovation

Within the existing facility there are mainly light framed partition walls (wood or metal studs). However, there are two existing interior CMU partition walls. One is a newer 8”x8”x16” CMU wall on one side of the corridor that extends to the bottom of the trusses (10’ above finished floor elevation). The other is an original 1942 “tile” masonry wall

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3509 Iron Horse Drive Ladson, SC 29456 that separates the helmet station from the locker area. This unreinforced wall extends to the pitched roof deck which creates an approximately 20’ unreinforced masonry wall.

In addition to the existing openings already present, the new floor plan will need new openings in this wall and although this area of the country does not experience high seismic forces, it has been determined that this tall unreinforced masonry wall will be demolished and replaced with a new metal stud wall to better facilitate the desired floor plan.

Another existing masonry wall will also be demolished. The existing 1942 gable end wall adjacent to the new addition will be demolished to the top of existing concrete foundation wall elevation. New penetrations and partial removal will be required in this wall due to new door openings and required attic space in the mechanical design. This will be replaced with a new structural 6” metal stud wall for ease of construction. This wall will also act as a shear wall for lateral resistance for the new addition.

New daylighting windows will be installed within original 1942 openings that have been infilled with masonry during the life of Building 1630. This should require little structural retrofit since the original openings are to be reused which contain concrete lintels.

New partial height 4” CMU will be incorporated as an exterior finish on the majority of the perimeter of the building including the “lean-to” metal building in which a new small 12”x10” concrete footing will be installed. In order to support this new CMU veneer on the existing foundations of the 1942 main building and 1950’s mechanical room, the lowest course below grade will be installed atop the existing footing 1” maximum from the existing wall and each course above will be stepped outward an additional 1/2”+/-from the course below until the faces are flush with the courses above grade.

Addition

Although the new and existing structures are to appear to be integral, the approximate

40’x64’ addition will be treated as a separate and independent structure which will have vertical and lateral supporting elements on all four sides of the locker room. The roof of the addition will be constructed of new light gauge steel trusses (pitch and extents to match the existing roof) spaced at approximately 4’-0” on center with a galvanized

1.5B22 steel deck diaphragm and topped with rigid insulation and the new standing seam metal roofing system (SSMRS).

New exterior walls of 8” CMU with both vertical and horizontal reinforcement shall be provided to resist wind and seismic loads as well as the gravitational forces from the roof structure. These walls shall be anchored to the new foundation with vertical reinforcement. These walls will also be provided with steel bearing plates cast into

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3509 Iron Horse Drive Ladson, SC 29456 horizontal bond beams at the top of the new CMU walls so that the new steel trusses can be sufficiently fastened/anchored to the plates to resist all applied loading.

As mentioned above, the existing 1942 gable end wall adjacent to the new addition will be demolished to the top of existing concrete foundation wall elevation. A new structural 6” metal stud wall with flat strap x-bracing will be constructed and anchored to the existing foundation. This wall will also act as a shear wall for lateral resistance for the new addition and will be anchored to the new trusses.

All concrete will be normal weight with a 3,000 psi compressive strength. The floor will be a 6” thick concrete slab on grade reinforced with 6x6-W2.9xW2.9 welded wire fabric over a 4” capillary barrier. A 10 mil polyethylene vapor retarder will be placed under the slab on grade and over the subgrade. The concrete slab on grade shall have sawed control joints at approximately 10’-0” to 15’-0” on center each way. The slab will be poured up to the CMU wall with a 1/2” expansion joint filled with expansion material to allow for differential movement.

The net allowable soil bearing capacity is 2,000 psf per the geotechnical report. The 8” reinforced CMU wall will have all cells below grade filled with grout. The wall will be supported on a continuous 24” wide by 12” thick reinforced concrete footing approximately 24” below grade. This footing will also support the new partial height 4”

CMU veneer.

A total of 4 new steel framed open canopy entrances will be provided in this design to closely match the existing building 1650 entrance.

Antiterrorism/Force Protection (AT/FP)

During the Pre-proposal and Pre-design meetings, it was determined that upon completion of the renovation and new addition, the building will be routinely occupied by

8 DoD personnel (the same number as in the existing facility). This was further confirmed in a letter dated 23 Jun 14 written by James Pettus (301 FW Anti-Terrorism

Officer) where it was determined that the facility is routinely occupied by 8 people classifying the building as low occupancy. The new design will not change the occupancy of the facility (will remain low occupancy), nor with the renovation and addition trigger compliance with UFC 4-010-01 in reference to cost because the project costs will not reach 50% replacement value.

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Some new glazing will be installed for daylighting but the glazing and supporting structural elements requirements of UFC 4-010-01 will not be triggered due to the occupancy of the building and replacement costs.

References

IBC 2012 International Building Code, 2012 UFC 3-301-01 Structural Engineering UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings ASCE 7-10 Minimum Design Loads for Buildings and Other Structures

See construction documents for additional references.

Electrical Design Narrative

The existing 150 kVA pad mounted service transformer will supply a 400 amp, 120/208 volt electrical service. The existing service entrance conductors are sized for 250 amps.

The main circuit breaker in the existing main panel ‘MDP’ is 400 amps, resulting in inadequate overload protection for the service conductors. To correct this situation, the existing underground electrical service will be demolished and a new underground electrical service rated for 400 amps will be installed.

The existing main distribution panelboard ‘MDP’ will be replaced with a new ‘MDP’ with a 400 amp main circuit breaker. Existing panel ‘LA’ will remain and be relocated. An existing unlabeled subpanel will also be replaced with a new 225 amp, three phase panel. Existing branch circuits connected to existing panels to be replaced or relocated will be reconnected to new panels. A new 100 amp, three phase panel will be installed in the new communications room.

All existing interior light fixtures will be replaced. New lighting will consist of recessed or surface mounted energy efficient fluorescent fixtures with T5 lamps and electronic ballasts. Where practical, light fixtures will be controlled with dual switching to allow for one, two or three lamp operation. Ceiling mounted occupancy sensors will be installed in most rooms. Existing wall mounted emergency lights will be demolished. Emergency lighting will be accomplished with integral battery packs in light fixtures. New exit signs will be LED type. New exterior wall mounted fluorescent fixtures will be installed at the new exits.

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All communication cabling will be removed and replaced with CAT6 cabling. Each communications faceplate will have two data outlets and two voice outlets. This will allow the occupants to have extra outlets for computers and telephones. The existing wireless access points will be taken down and saved during construction and be replaced in their current locations. The existing telephone backboard in Room 116 will be demolished and a new telephone backboard will be installed in the new communications room. The existing communications cabinet housing the network switch will be replaced with a larger cabinet and be located in the new communications room. New 12 strand fiber optic cable and 25 pair copper cable will be installed from the existing communications handhole to the new communications room. The existing network switch will be removed and reinstalled by the Government. New television outlets will be installed where requested by the user.

A new lightning protection system (LPS) will be installed. The LPS will consist of air terminals, down conductors and extension of existing counterpoise system. The new

LPS will be UL listed and labeled.

An empty conduit system with pull string will be installed at monitored doors for the

Intrusion Detection System.

Mechanical Design Narrative

The existing buildings envelope is poor to fair with vented gabbles and little insulation in the roof and ceiling; the exterior walls have approximately 1-1/2” EIFS as insulation. The

Scope of Work requires minimum envelope U-values in accordance with ETL 94-4

Energy Usage Criteria for Facilities in the Military Construction Program as follows:

Wall U-value: 0.580; eq. R-value: 1.72

Roof U-value: 0.034; eq. R-value: 29.4

Door U-value: 0.210; eq. R-value: 4.76

Window U-value: 0.350; eq. R-value: 2.86

The renovated building and addition should have an indirectly/semi-conditioned ceiling space with insulation at the roof structure, and the gabble ends infilled and insulated.

The following would be building envelope goals for the new addition:

Wall U-value: 0.049; eq. R-value: 20 or BETTER

Roof U-value: 0.027; eq. R-value: 38 or BETTER

Door U-value: 0.210; eq. R-value: 4.76 or BETTER

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Window U-value: 0.350; eq. R-value: 2.86 or BETTER

The existing building HVAC systems will be removed and demolished. These systems include the Carrier 20-Ton packaged unit, Trane 4-Ton heat pump, exhaust fans/hoods, all ductwork and diffusers/grilles, all HVAC related piping, and all HVAC controls. The existing break room hood and exhaust system will remain.

New HVAC systems will be provided and installed to serve the entire renovated facility including the new addition and storage addition. The new system type will be VRV Heat

Pump System with simultaneous heating and cooling as selected by the Base after reviewing the options and recommendations of the Mechanical HVAC System

Comparative Analysis section provided in the 35 percent basis of design. This system would include an outside VRV heat pump unit, several indoor VRF fan coil units, and branch circuit controller type units.

Per UFC requirements, this facility shall have a dedicated outside air system (DOAS).

This DOAS will be an energy recovery packaged unit located directly outside the mechanical room due to space and maintenance access limitation within the newly renovated building.

The packaged DOAS will provide exhaust for spaces such as restrooms, laundry areas, storage areas, and kitchens via new exhaust grilles. The exhaust ductwork shall penetrate through the mechanical room wall and route directly to the DOAS connection.

The exhaust hood that is currently located in another building will be located in the new

FLOAT/GLUE/TALC space as required by the users. This exhaust hood shall be connected to the new DOAS exhaust.

Plumbing Design Narrative

The existing building natural gas distribution piping will be demolished along with the pressure reducing valves and underground piping that is currently located beneath the new addition designated space. A new natural gas smart meter shall be provided and installed to meet the Base standards. New natural gas piping will be black carbon steel and routed from the new natural gas smart meter to the new DOAS unit and domestic hot water heater.

The existing electric domestic hot water heaters shall be removed and replaced with a new storage tank natural gas hot water heater sized to provide the renovated building

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3509 Iron Horse Drive Ladson, SC 29456 with adequate hot water for personnel showering. The existing unit provided the facility with approximately 20 minutes of continuous single shower operation. The new hot water heater will be sized to provide minimum 20 minute duration. Select existing domestic water piping will be demolished and a new piping system for domestic hot and cold water will be installed to include domestic hot water recirculation to meet the requirements for both new eye wash stations.

The renovated facility will be provided with a water cooler/drinking fountain with water bottle filling capability. This water cooler/drinking fountain will be located within the new addition AFE LOCKERS space.

Two (2) new permanent eye wash stations shall be provided with the new renovation.

These stations will meet the requirements of ANSI Z358.1-2009. The spaces with hazards requiring the eye wash stations are the following: FLOAT/GLUE/TALC and AFE

LOCKERS spaces.

The existing facility does not have a compressed air system. The renovated facility will be provided with a new compressed air system to include an air compressor, refrigerated dryer, and two (2) hard piped connections. The new air compressor shall be located within the mechanical room. The two (2) hard piped connections shall be located in the FLOAT/GLUE/TALC and SURVIVAL EQUIPMENT spaces. Each hard piped connection will match the connections that are currently used by the Users at another facility. This will include a filter/dryer/regulator assembly, ball valve, purge/drip leg, and female quick disconnect. The compressed air system will be sized to meet the needs of the Users.

The existing facility has a shop vacuum located in the ceiling space that is used for vacuum sealing components. This vacuum will be removed and turned over to the government or demolished. The renovated facility will be provided with a central vacuum system that will be hard piped to the spaces requiring a vacuum port. These spaces are the FLOAT/GLUE/TALC and KIT/VEST ROOM spaces. The new central vacuum will be located within the mechanical room for ease of access and maintainability. The vacuum will be light commercial cyclonic filtration type.

All facility plumbing modifications associated with the addition and renovation (e.g., the restrooms modification) shall be coordinated. Removed fixtures supply and DWV piping will be capped and new fixtures will be provided with new piping as required for the renovation and new fixture locations. New restroom fixtures shall be provided with automatic controls. Break room sink shall be provided with 1 HP garbage disposal.

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Fire Protection Design Narrative

Fire Suppression

The building shall be protected throughout by a new automatic sprinkler system. For the spaces containing the water reactive flight suits (AFE Lockers, ACDE, NVG/HMIT, Survival Equipment, and Kit/Vest Room) a double interlock pre-action sprinkler system (dry) will be provided along with an automatic air sampling smoke detection system with 3 levels of alert. The double interlock pre-action sprinkler system requires two conditions before water is introduced into the piping. One, a smoke or heat detector must activate; and two, a sprinkler must activate and release the pressurized air in the piping. If only one of the two occur, the sprinkler piping will remain dry. The majority of the building consists of lightly loaded nonstorage and nonmanufacturing areas with ordinary combustibles that is Hazard Category 1 (HC-1) as defined in FM Global 3-26.

In addition there is a small mechanical room that is Hazard Category 2 (HC-2). All wet-pipe sprinkler system areas will be protected with quick response sprinklers. Pre-action systems will be protected with standard response sprinklers. All ceilings are less than 30 feet high. Sprinkler design for wet-pipe HC-1 areas will be based on a density of

0.10 gpm/sq. ft. over a design area of 1500 sq. ft. Sprinkler design for wet-pipe HC-2 areas will be based on a density of 0.20 gpm/sq. ft. over a design area of 2500 sq. ft, however, the HC-2 area is only 382 sq. ft.

A new backflow preventer will be provided for the wet-pipe sprinkler system and it will be part of the sprinkler riser. Water supply will come from the existing base water distribution system in the vicinity of the site. A new 6-inch fire water service line inclusive of a new post indicator valve will be provided for the building. A fire department connection will be provided for the building and located such that it is within 150 feet of a fire hydrant and accessible by the fire department.

Hydraulic Analysis

Water Supply:

A fire hydrant flow test was conducted on Monday, October 6, 2014 by our registered fire protection engineer, Mark Lazo, PE. The following is a summary of the results of the test:

Pressure Hydrant – #205 Between B1627 and B1626 Static Pressure: 60 psi Residual Pressure: 40 psi

Flow Hydrant – #105 at flight line fence, SW of B1637 Outlet Size: 2-1/2 inches Outlet Shape: Rounded

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PO Box 1680 22

3509 Iron Horse Drive Ladson, SC 29456

Cd: 0.90 Number of Outlets: 2 Pitot Readings:

Outlet 1: 25 psi => 932 X 0.9 = 839 gpm Outlet 2: 25 psi => 932 X 0.9 = 839 gpm

Total Flow: 1678 gpm Calculated Flow (20): 2440 gpm

Figure 1 – Hydraulic Graph of Hydrant Flow Test Results

Fire Suppression Demand:

HC-1: Locker Room Design Parameters:

Density: 0.10 gpm/sq. ft.

Design Area: 1500 sq. ft.

Hose Demand: 250 gpm for 60 minutes Area/Sprinkler: 200 sq. ft.

K-factor: 5.6 Height above grade: 12 ft.

Inside Pressure Loss: 15 psi Outside Pressure Loss: 20 psi

Naval Air Station, Fort Worth Joint Reserve Base, TX www.cemsengineering.com

PO Box 1680 23

3509 Iron Horse Drive Ladson, SC 29456

HC-1 Flow Demand

Est. Sprinkler Demand = 0.10 gpm/sq. ft.X1500 sq. ft.X130% = 195 gpm Total Flow Demand = 195 gpm + 250 gpm = 445 gpm

HC-1 Pressure Demand

End head pressure: p = (Q/K)2

Q = 0.10 gpm/sq. ft. X 200 sq. ft. = 20 gpm K = 5.6 p = 12.75 psi

Pressure loss for height: ph = 0.433 psi/ft. X 12 ft. = 5.19 psi Inside Pressure Loss = 15 psi Outside Pressure Loss = 20 psi (includes 12 psi for BFP)

Total Pressure Demand = 12.75 psi+5.19 psi+15 psi+20 psi = 52.95 psi

A comparison of the estimated demand to the available water supply indicates that there is 58.3 psi available at 445 gpm resulting in a 5.35 psi safety factor.

Based on this hydraulic analysis, a fire pump is not required.

Building Code/Life Safety Analysis

1. Occupancy classification:

Group B - IBC 304 Business - NFPA 101 6.1.11.1 & Chapter 38

2. Type of construction (IBC): Type II-B (unprotected/fully sprinklered)

3. IBC Table 503: allowable height and building area: Group B

Allowable height: 4 stories (55') Allowable area: 23,000 sf

Automatic Sprinkler Increases Height (IBC 504.2): 1 story and 20’ => 4 stories (75’)

Area (IBC 506.3): +200% => 69,000 sf

Actual height: 1 story above grade 15’ Actual area/floor: approx. 8,300 sf

4. IBC Table 601 & 602: Fire resistance rating requirements for building elements for

Type II-B

Naval Air Station, Fort Worth Joint Reserve Base, TX www.cemsengineering.com

PO Box 1680 24

BUILDING ELEMENT RATING (HOUR) REFERENCE (IBC)

Structural Frame (Columns, Girders & Trusses) 0 Table 601

Bearing Walls Exterior Interior

Table 601 Table 601

Nonbearing Walls & Partitions

Interior 0 Table 601

Floor Construction 0 Table 601

Roof Construction 0 Table 601

Exterior Wall 0 Table 602

5. NFPA 101 38.1.7=>table 7.3.1.2 - occupant load Business = 100 sf/person Business proposed: 83 Occupants

6. NFPA 101 38.2.3=> table 7.3.3.1 - egress capacity Business stairs = 0.3 (inches per occupant) Business level = 0.2 (inches per occupant)

Required for stairs above grade: N/A for single story.

Required for level above grade: 16.6” (83 occupants x 0.2” per occupant)

Proposed for level: 72” for support space and 72” for Locker Room: (2) 36” exit doors from each area.

7. NFPA 101 paragraph 38.2.6.3 - exit access travel distance Business required: 300 feet Business proposed: <300 feet

8. NFPA 101 paragraph 38.3.6.1 - corridor fire-resistance rating (hour) no rated corridor required (sprinklered)

9. NFPA 101 paragraph 38.2.3.2 => 7.3.4 - corridor width less than 50 occupants => 36” 50 or more occupants => 44”

Proposed: >44"

10. NFPA 101 paragraph 38.2.5.2.1 – Dead end corridor Business: Permitted: 50 feet

Naval Air Station, Fort Worth Joint Reserve Base, TX www.cemsengineering.com

PO Box 1680 25

3509 Iron Horse Drive Ladson, SC 29456

Proposed: no dead end corridor NFPA 101 paragraph 38.2.5.3.1 – common path of travel Business: Permitted: 100 feet Proposed: no common path

11. NFPA 101 paragraph 38.2.4.2 & 42.2.4.1- minimum number of exits Required for Business: minimum 2 Business proposed: 2 exits from support area and 2 exits from locker room

Fire Alarm / Mass Notification System

A new combination analog addressable fire alarm and mass notification system shall be installed. The new system will monitor the sprinkler system for supervisory and alarm signals as well as provide audible and visual notification in all occupied areas. The existing fire alarm and detection system will be removed.

The new system will be provided with manual pull stations, smoke detectors, duct smoke detectors, heat detectors where needed, and will monitor all new sprinkler waterflow alarm switches and valve tamper switches. Rooms with water reactive flight suits will be protected with an automatic air sampling smoke detection system with a minimum of 3 alert levels. Notification shall be provided with speakers, speaker/strobes and strobes throughout the facility. Strobes with clear lenses shall be provided for fire alarm and mass notification, and shall be marked “ALERT.” Speaker taps shall be adjusted as necessary to meet intelligibility requirements of UFC 4-021-01.

All signaling line circuits (SLC) and initiating device circuits (IDC) shall be wired in a Class A configuration. All notification appliance (NAC) circuits shall be wired in a Class A configuration.

A Local Operating Console (LOC) shall be provided on each floor to allow users to send pre-recorded messages throughout the facility and to shutdown HVAC system in case of a biological attack. Additional dedicated HVAC shutdown release stations shall be provided to allow this function to be performed in the path of egress from the facility.

Transmission of fire alarm signals and interface with the mass notification system on the base shall be achieved using a new Monaco Radio Transmitter.