FBHR_ACP-North_and_South_NARRATIVE_20-MAR-2019.pdf

United States Army Corps of Engineers (USACE)

Fort Bliss Hospital Replacement – El Paso, TX

Access Control Points (North & South ACPs) Construction Documents – Project Manual

March 20, 2019

– ACPs Construction Documents

Ft. Bliss Hospital Replacement

TABLE OF CONTENTS – PROJECT MANUAL

SECTION ONE EXECUTIVE SUMMARY

1.1 EXECUTIVE SUMMARY NARRATIVE ...............................................1-1

SECTION TWO COMPREHENSIVE NARRATIVES

2.1 CIVIL DESIGN ....................................................................................2-1

2.2 SITE ELECTRICAL DISTRIBUTION ...................................................2-5

2.3 LANDSCAPING..................................................................................2-6

2.4 EXTERIOR SIGNAGE ........................................................................2-7

SECTION THREE BUILDING SYSTEMS NARRATIVES

3.1 ARCHITECTURAL .............................................................................3-1

3.2 STRUCTURAL SYSTEMS ..................................................................3-2

3.3 MECHANICAL SYSTEMS ..................................................................3-6

3.4 PLUMBING SYSTEMS ..................................................................... 3-11

3.5 ELECTRICAL SYSTEMS.................................................................. 3-12

3.6 FIRE PROTECTION/LIFE SAFETY .................................................. 3-15

3.7 INTERIOR DESIGN .......................................................................... 3-23

3.8 INTERIOR SIGNAGE ....................................................................... 3-27

3.9 TELECOM/DATA ............................................................................. 3-27

3.10 SITE ATFP/SECURITY ..................................................................... 3-32

3.11 ATFP BUILDINGS ............................................................................ 3-34

3.12 LEED ................................................................................................ 3-55

3.13 COMMISSIONING ............................................................................ 3-66

Ft. Bliss Hospital Replacement

SECTION FOUR APPENDICES

A Architectural Exterior Materials Cutsheets B Architectural Interior Cutsheets C Architectural Images D Mechanical Calculations E Mechanical Cutsheets F Plumbing Calculations G Plumbing Cutsheets H Electrical Cutsheets I Electrical Calculations J Structural Calculations K Energy Report L LEED Checklist M QA/QC Checklist N Blast Report Appendices O Commissioning P ACP Threat Scenarios with Calculations Q Interior Color Boards R Exterior Color Boards S Finish Book T Furniture Book U Meeting Minutes

Ft. Bliss Hospital Replacement – ACPs Construction Documents

SECTION 1: EXECUTIVE SUMMARY

1.1 EXECUTIVE NARRATIVE

The Access Control Points (ACPs) project is part of the Fort Bliss Replacement Hospital.

It is designed as a separate bid package. It will be a permanent and integral part of the new Hospital Campus, which is outside the controlled perimeter of Fort Bliss in El Paso, Texas. It shares the same objectives as the Hospital in developing a ‘Stateof-the-Art’ World class Military Medical Center.

Two ACPs are planned for the Hospital campus. The South ACP will be open 24 hours per day, 7 days a week, and will be the Primary ACP used by visitors and patients. The ACP will have capability for commercial traffic on a limited basis. The North ACP will be open 10-12 hours per day, 5 days a week, and will be a Secondary ACP used by badged personnel and commercial vehicles.

Per the RFP, the design of the ACPs is based on the Army Access Control Points Standard Design/Criteria prepared by the U.S. Army Corps of Engineers Protective Design Center, Omaha District.

The ACPs shall be designed for the following functions:

A. Vehicle screening. All vehicles shall be screened for authorization to enter the installation.

B. Personnel identification validation. The identification of all personnel entering the installation shall be verified along with their authorization to enter the installation.

C. Personnel and vehicles shall be checked and/or searched per prevailing Force Protection Conditions and local procedures.

This 100% submittal has been prepared by HDR | Huitt-Zollars. All previous review comments given to us by the USACE Omaha District have been addressed. Information from all disciplines is represented in this document to form the basis of design.

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SECTION 2: SITE NARRATIVES

2.1 CIVIL DESIGN

2.1.1 Guidance Criteria

The guidance for the development of the Access Control Point (ACP) was the Army Access Control Points Standard Design/Criteria by the Protective Design Center from the Omaha District of the United States Corps of Engineers (USACE) published in January 2009. The Fort Bliss Replacement Hospital is being planned with two ACPs for entry into the campus site. One access point is on the north side of the campus (North ACP) and the other is slated for the south end of campus (South ACP). The South ACP is considered as the primary entry point for the Hospital and will be for all visitors and patients, but can accommodate staff and commercial traffic on an as needed basis. It is intended that the North ACP will be for badged personnel and commercial vehicles. The required exit lanes will be provided at both locations. Layouts have been developed based upon review of conceptual layouts provided in February 2010 to the USACE, including the Omaha District. Comments were received in March from the USACE, and the layouts now shown are in response to those comments. The South ACP has since been updated to more closely reflect the COS guidelines and to more closely follow the overall design concept. The updated layout incorporates the comments from the original review.

2.1.2 South ACP

The South ACP will be the primary access to the hospital. Entry into the site will be off a 4-lane divided thoroughfare running along the southern edge of the campus. Dedicated left turn and right turn lanes are being provided on the thoroughfare to provide deceleration lane and additional stacking off the main lanes. Two lanes will bring the traffic into the approach zone.

Visitors will have to access the Visitor Control Center (VCC) to gain entry to the hospital.

A parking lot is provided with a minimum of 25 spaces for visitor parking. The VCC is recommended to have three processors based on expected populations. Entry into the parking lot is off the incoming lanes for visitors and will be signed accordingly. The required 82-foot ATFP standoff has been provided between the VCC and the surrounding facilities.

Three ID check lanes are planned for the South ACP. Traffic counts for the ACP quantify that three lanes will be sufficient to handle the expect traffic volumes with acceptable queuing in the approach zone as the lanes expand from two to three lanes.

An additional lane along the left side is provided to provide continuous access for emergency vehicles in to site. The lane will be signed for emergency vehicle use and striped to keep traffic from occupying the lane. A manually operated crash beam barrier will be placed across the entry at the ID check. On incoming emergency runs the gate will be opened for emergency vehicle access and closed after the emergency vehicle gains entry.

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Off the approach corridor to the South ACP, a separate service drive is required to provide access to the proposed electric substation and existing water tank farm. A median opening and crossing is provided to allow the service vehicles (small and large trucks) to exit without having to access the ACP facilities.

2.1.3 North ACP

The north entry layout was developed for commercial vehicles and for privately owned vehicles (POV) and staff which are badged for the Hospital and/or Fort Bliss. Full commercial inspection facilities will be provided, excluding any x-ray facilities. The commercial layout was based on the layout for the commercial portion on the standard drawing of a primary ACP with VCC and commercial vehicles from Sheet C3.01 from the Standard Design manual. The entry was fit to the site conditions and proposed roadway network.

The staff entry was based on a simple ACP layout with access for badged employees only. The identification check stations use standard widths, layouts and dimensions and are planned for two lanes of ID checks. Staff will be expected to present their credentials either to a guard or proximity stand for validation and entry. A gatehouse has been provided as needed for oversight of the ID stations. The required delay time is provided in the POV drive between the ID check station and the active barriers. An overwatch area is provided at the active barrier location for monitoring. The active barrier is positioned at the end of the commercial area before entry into the site.

The outbound lanes are not parallel to the inbound POV lanes in order to allow the greater turning radii of commercial traffic to exit if they are denied entry. The North ACP is expected to handle deliveries during normal business hours on an extended shift which may be 5-days per week, 10 to 12 hours per day. Any commercial traffic received outside this period will have to be processed at the South ACP.

2.1.4 Elements Common to Both ACPs

Search areas are provided for commercial and POV, based upon our discussions in our meeting on 25 January 2011. The commercial search area is sized to handle two vehicles at a time. The canopy for the search area will be set at 17 feet high to allow extra height vehicles access. The POV search area is accessible as a call back from the guards at the ID check. The search office is located adjacent to the search area canopy for ease of access and to provide shelter for personnel.

A commercial reject lane is provided before the ID checks stations to allow the truck to return and access the commercial entry past the VCC. A two way access is provided at the visitors parking area to allow the commercial access and visitors to exit from the VCC parking area. The gatehouse is set past the ID check stations to provide oversight of the stations and the exit lanes. An overwatch pad is set at the active barrier location to provide oversight and deployment of the active barrier. The required delay time is provided between the ID check stations and the active barrier.

All necessary facilities for the buildings will be provided and extended to the buildings in the development of the site utilities and completed during the ACP construction. Passive vehicle barriers will be placed along the inbound and outbound lanes of the ACPs and fencing, sitting away from the passive vehicle barriers, along the outside of the roadways

2-3 to funnel the traffic through the ACP and connecting to the active barrier locations to contain the vehicles. The design vehicle for the commercial side is a WB-62 truck per the Standards. Auto-turn layouts were run though the layouts and pavement lines were set such that the wheels will be on pavement for the movements necessary to navigate the ACP entries and exits.

Wrong way detectors will be placed after all rejection lanes crossovers for both ACPs.

The north ACP may have overspeed detectors for the POV entry as the geometry is a straight point of access to the ID check stations.

2.1.5 Site Description

The proposed ACPs are on the north and south portions of the Fort Bliss replacement hospital site. This site is located on approximately 260 acres at the southwest corner of Spur 601 and Loop 375. The site is currently undisturbed desert land and under construction for the site infrastructure. The site currently slopes downward from east to west and this existing drainage pattern will be maintained through the construction of ditches, underground storm sewer conduit, and retention ponds. Though there are no existing utilities on site. The Site Infrastructure will perform certain mass grading and extend utility mains to the edges of the proposed ACP sites.

2.1.6 Systems & Infrastructure

A. Concrete Roads Portland cement concrete roads with monolithic curbs will be proposed for the roads and drives at each ACP. This will be consistent with that provided on all other portions of the Hospital campus and perimeter roads being built in other design packages. Concrete sections will be consistent with that defined in the Site Infrastructure package, and based on the site geotechnical report provided by the US Army Corps of Engineers – Fort Worth District. Primary ACP entry – exit roadways will be 4-lanes wide, comprised of two 31-foot sections back of curb to back of curb separated by a center median of varying width. There are many areas where these roads will be wider and have transition sections to accommodate inspection / check lanes or truck turning movements.

Pavement markings and signage design will be in accordance with the United States Department of Transportation Federal Highway Administration “Manual on Uniform Traffic Control Devices”. Fire accommodations will be provided as outlined in UFC 3- 600-01. Fire Department access will be provided throughout B. Storm Drainage The existing drainage pattern onsite is from east to west away from Loop 375. The existing high point on site is roughly 3994 feet above mean sea level (msl) and a low of approximately 3967 feet msl.

Drainage for the site will predominantly be overland flow through either natural drainage patterns or constructed drainage swales. Retention ponds which will serve the ACP sites will be constructed as part of the Site Infrastructure package. These ponds and associated site drainage lines will be sized to contain the 100 year flows generated by a fully developed site. Retention ponds are sized based on the City of El Paso Drainage Design Manual. In some areas, a storm sewer conduit system will be required to convey

2-4 storm water runoff to proposed retention ponds. All storm sewer pipes will be reinforced concrete pipe.

C. Water Domestic water on this portion of the base is owned by the Directorate of Public Works (DPW) but is operated and maintained by Pride Industries under contract to the Government. All primary on site distribution mains that will be on the Hospital site, including near or adjacent to the ACP sites, will be built under the Site Infrastructure package. However, a few internal lines in/around the ACPs will need to be built, and will be 8-inch C-900 polyvinyl chloride (PVC) pipe. Fire hydrants will be placed every 350 feet to provide required fire coverage. Fire hydrants will be installed 7 feet from the back of curb as allowed by Fort Bliss requirements. Fort Bliss Fire Department requires that the fire hydrants sit three to seven feet from the curb. All fire hydrants laterals will be 6 inch PVC. Isolation valves will be provided as necessary to allow repair and maintenance. Building services to the several small buildings on the ACP sites will be provided to satisfy potable water needs and fire protection requirements, if any.

It is anticipated that water line pressures will range from of a low of approximately 57 psi to a high of approximately 68 psi. Once the proposed water mains are installed, operational system pressures should be verified. Water pressure should be maintained at or above 40 psi and should in no instance drop below 30 psi. During fire flow conditions, water pressures must not fall below 20 psi at the fire hydrants, and lines will be sized for this design parameter. Maximum pipe velocities will not be greater than 10 feet per second. D. Sanitary Sewer The main sanitary sewer gravity lines servicing the ACP sites will be built under the Site Infrastructure package. However, extensions of these sewer lines must be brought into the site to serve the Visitor Control Center and guard house buildings on an as needed basis. These sewer lines will nominally be 8” PVC with 4” or 6” services and a 2” force main of PVC construction.

Sewer service for the South ACP would connect to the 15” sanitary sewer in Street C along its south site line or to an 8” lateral on Street H if the waste water treatment plant is constructed. The North ACP will construct a small lift station to convey the flows to a lateral connection on Street J east of Street A. The small flows from the North ACP will not allow us to convey the flows in a traditional gravity situation and meet the UFC criteria requirements for flow velocity. A small 2” force main will transport the flows from the small lift station placed in the North ACP area to the lateral tie-in.

E. Natural Gas Currently Texas Gas Service supplies natural gas to Fort Bliss. Texas Gas Service, under contact to the Government and via Texas Railroad Commission Gas System ID No. 211880, operates the existing natural gas distribution system on Fort Bliss and Biggs Army Airfield.

Primary natural gas service lines to the Hospital site are being built under the Site Infrastructure package as a series of high pressure (125 psi) and medium pressure (40 psi) lines. Should the ACPs need gas service to any ACP building, lines can be extended to those buildings. However, at this time, it is anticipated that these buildings

2-5 do not need gas service. The hot water and heat for the several ACP buildings are expected to be handled using electrically powered units.

2.2 SITE ELECTRICAL DISTRIBUTION

A new underground 13.8 kV primary distribution system has been designed and will be installed under the Campus Infrastructure project to support the ACP campus facilities.

The Campus Infrastructure project includes pad-mounted switches, medium voltage feeders, and manholes that make up the underground primary distribution that will serve as the point where electrical power will be derived for both the North and South ACPs.

The North ACP will derive power from existing switch SW-LA-3 via a new medium voltage feeder in an existing spare 5” conduit. This spare conduit extends to existing manhole EMH-LA-11.2. The new medium voltage feeder will be extended from this existing manhole and will terminate into a new 225 kVA pad-mounted transformer.

The South ACP will derive power from existing switch SW-LB-1 via a new medium voltage feeder and terminate in a new 300 kVA pad-mounted transformer.

The North ACP pad-mounted transformer is located in an electrical yard south of the Gatehouse and east of the Search Canopy. The North Gatehouse will serve as the head-end secondary distribution location. Emergency power for the North ACP will be derived from a stand-by diesel generator that will also be located in the electrical yard.

The generator voltage will be 480Y/277V, 3 phase, 4 wire and the rating of the generator is 175 kW. The stand-by power system will be designed and installed as a separately derived power system using a 4 pole ATS. From the Gatehouse, new 480V feeders will distribute normal and stand-by power to the remaining remote buildings and structures.

The South ACP pad-mounted transformer is located in an electrical yard in a central location west of the Visitor Control Center. The Visitor Control Center will serve as the head-end secondary distribution location. Emergency power for the South ACP will be derived from a stand-by diesel generator that will also be located in the electrical yard.

The generator voltage will be 480Y/277V, 3 phase, 4 wire and the rating of the generator is 250 kW. The stand-by power system will be designed and installed as a separately derived power system using a 4 pole ATS. From the Visitor Control Center, new 480V feeders will distribute power to the remaining remote buildings and structures.

The North and South ACP’s will have power feeders distributed from the head-end secondary distribution to each remote building and structure in concrete encased secondary electrical duct banks. The secondary voltage will be 480Y/277V, 3 phase, 4 wire and cabling will be 600 volt rated.

2.2.1 Site and Area Lighting

Site lighting for the project will typically consist of pole mounted HID lighting. Metal halide sourced lighting fixtures mounted on poles with concrete bases will illuminate the roadways, approach drives, parking areas, and other paved areas throughout the ACP facility. Metal halide lamps will generally be used for area illumination to meet the color rendition index requirements of not less than 65 CRI for ID Check and Search Areas and not less than 50 CRI for all other areas in the ACP’s. The fixture and pole types that

2-6 were used in the SITE Infrastructure package will be used as the basis of design for continuity of appearance and design. Conduits will be routed between the poles and stubbed up into the base of the poles. Each pole will be grounded and have its own supplementary grounding electrode. Lighting fixtures pole heights will be 20 feet, and pole spacing will be determined according to footcandle lighting levels and will conform to Illuminating Engineering Society of North America (IESNA) and UFC criteria and standards. House-side shields will be used along the perimeter of the site to minimize light trespass into adjacent spaces of the project site. Circuit voltage will generally be 480V or 277V for voltage drop considerations.

Area lighting for the project will typically be considered as building mounted fixtures, canopy lighting, pedestrian lighting, and non-roadway lighting. These areas will generally be illuminated with metal halide and fluorescent lamps. Consideration for the selection of the source and lighting levels will be made based on the type of operation or activity that will take place in specific areas and the recommended practice as discussed in the Army Access Control Points Standard/Design Criteria, UFC, and IESNA.

Emergency power for site and area lighting will be provided by generator where required.

A. Approach and Response Zones and Search Area Parking and Roadways – 3 Foot

Candles (FC) average with average to minimum ratio not to exceed 4:1.

B. Access Control Zone and Search Areas – 5 FC average with average to minimum ratio not to exceed 3:1. In the location where ID checks or searches are made, illumination shall be 10 FC or twice the illumination in the immediate surrounding area (whichever is greater). The vertical illumination shall be at least 25% of the horizontal illumination.

C. Lighting at the ID Check and Search Areas shall have a color rendition index (CRI) of not less than 65. All other light sources shall have a CRI of not less than 50.

2.2.2 Applicable Codes and Standards

A. Army Access Control Points Standard/Design Criteria B. UFC 3-501-01 Electrical Engineering C. UFC 3-550-01 Exterior Electrical Power Distribution D. UFC 3-530-01 Design: Interior and Exterior Lighting and Controls E. National Electric Code (NEC) NFPA 70 F. Illuminating Engineering Society of North America (IESNA)-Lighting

Handbook

2.3 LANDSCAPING

The south access control point (ACP) will be the main entrance to the new hospital. The primary objectives for the landscape design are to welcome patients, visitors, and staff and unify all the functional elements associated with this site into one, contiguous environment. A Visitor Control Center for badge pick-up is the focal point of the south ACP. Large masses of plant material will surround this building. Other nearby buildings will be connected with sidewalks and plant material to enhance way finding and aesthetics. An outdoor space for staff will be integrated into the design, offering pleasant settings and visual assets, and providing a relaxing oasis from climatic extremes.

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Ornamental fencing, stone barriers, stone piers, and garden motifs will have similar aesthetics to those used at the hospital gardens and entrances. The north ACP will be the secondary entrance intended for use by commercial, service, and emergency vehicles, the design of which will be down played relative to the south ACP. It will have an entrance with an ornamental gate and stone piers and natural succession of the existing native plant community will be encouraged.

The intent of the planting design around the ACPs is to create a plant community with similar environmental and aesthetic characteristics which benefit the survival rate of the plants and unify the overall site. All plant material will be native or adapted to the region and will exclude invasive exotics. The use of a variety of native shrubs, succulents, ornamental grasses, perennials, and groundcover will enhance seasonal interest and the aesthetic quality of the space. Unifying the site will be accomplished through the aesthetic and functional application of the appropriate plant and hardscape materials.

This includes the harmonious blending of the built and natural environment to direct views to help with way finding, screen unsightly views, and buffer incompatible land uses. The landscape design here will complement the balance of the hospital.

The planting design can be described as having three different levels, which is consistent throughout the hospital site too. Level one is a higher density of planting with spacing at five to six feet on center. In this level there is a variation in the heights of the plants, but also in textures and colors. Level two comprises a lower density planting of 10 to 20 feet on center. Both levels one and two will include decomposed granite mulch and native or adapted plants. Level three comprises the restoration of the existing, native plant community. In this level, disturbed areas will receive soil stabilization to allow for natural secondary plant succession. Hydro-mulch will be used in this area along with plant seeding where necessary. The consideration to suppress dust emissions through the creation of natural recovery areas will be utilized in all three levels (as set forth in the “Fort Bliss Installation Design Guide”). The south ACP will exhibit planting levels one, two, and three and north ACP only level three.

An important consideration for all planting levels will be water conservation. In keeping with LEED for Healthcare, the objective is to minimize the amount of water needed by this landscape to thrive in the absence of long term irrigation. Levels one and two planting areas will have a temporary irrigation system which will increase the survival rate of these plants during the one year establishment period. Temporary irrigation will be located only in areas around buildings, walkways, and medians.

The landscape design will also respect and compliment the important security design measures inherent in an ACP. It will creatively include structural elements, such as passive barrier walls, stone bollards, and hardened landscape furniture, along with the strategic placement of earthen berms and low plant material.

2.4 EXTERIOR SIGNAGE

Exterior signage for the ACP is indicated by location on the Site Plans. Landscaping around the signage is also included in those plans. Grading for the signage has been taken into account in the Civil drawings. Power for signs requiring electricity is included on the Electrical drawings. To ensure continuity of product quality and optimum pricing, 2-8 the exterior signage for the ACP should be bid and procured with the interior signage bid package.

Ft.

Bliss

Hospital Replacement – ACPs Construction Documents

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SECTION 3: BUILDING SYSTEM NARRATIVES

3.1 ARCHITECTURAL

There will be a Primary and a Secondary ACP at the Fort Bliss Replacement Hospital.

The South ACP will be Primary, operating 24 hours per day, 7 days a week for visitors, patients, and off-hour commercial vehicles. The North ACP will be Secondary, operating 10 hours per day, 5 days a week for commercial vehicles and badged personnel.

Architectural components and features support the primary objective of the ACP, which is to prevent an unauthorized vehicle or pedestrian from entering the installation. The following are the principal structures within the ACPs:

The South ACP (Primary- Public Access) A.

ID Check Area canopy.

B. Guard booths for three lanes.

C. Gatehouse.

D. Search Area Canopy for Passenger Vehicles and Trucks.

E. Search Office.

F. Visitors Control Center (VCC).

The North ACP (Secondary- Commercial Access) A.

ID Check Area canopy.

B. Guard booths for two lanes.

C. Gatehouse.

D. Search Area Canopy for Passenger Vehicles and Trucks.

E. Search Office.

Refer to Appendix C for architectural images.

3.1.1 I.D. Check Canopies

The ID Check Area is covered over all inbound lanes by a canopy to provide some weather protection for the ID check guards. The canopies consist of a steel roof supported by steel columns and suspension rods. The architectural treatment reflects the architectural theme of canopies at the main hospital campus, with the use of stone, metal panel cladding and coated steel. Vertical clearance is 15 feet from underside of canopy to paving. The underside of the roof will support light fixtures and security equipment, such as CCTV cameras.

The search area canopy serves as cover for the guards and vehicles that need to be searched prior to entering onto the post. The search canopy is to have the materials as the ID check canopy but will be 17’ tall to accommodate larger delivery vehicles.

3.1.2 Guard Booths

A Guard Booth will be provided for each lane of inbound traffic for use by guards performing vehicle/passenger ID checks. Construction will provide UL 752 Level 3 ballistics protection. Guard booths will have HVAC, exterior and interior power, active barrier control console, computer workstation, communication equipment, counter space, and storage. The Guard Booths will be pre-manufactured and designed to be

3-2 compatible with same exterior finish materials of the other ACP structures. Passive barriers will be provided for crash protection from vehicles.

3.1.3 Gatehouses

The gatehouses will be provided to support ID Check Area guards and their activities.

They are located to give the Gatehouse guard clear 180˚ views of operations in the ID Check Area. Construction will provide UL 752 Level 3 ballistics protection. The floor plan conforms to the plans found in the ACP Standard Design/Criteria while the architectural treatment reflects architectural theme and character of the Hospital, where stone and terracotta tile is used in a rainscreen exterior wall system.

3.1.4 Search Area Canopies

Search areas for both Passenger Vehicles and Trucks will be provided. A single canopy structure will cover both areas, which are adjacent. Vertical clearance will be 17 feet.

The search area will be shielded from casual observation from the ID check Area and the VCC. Architectural treatment will be compatible with other ACP structures.

3.1.5 Search Offices

The Search Office will be provided adjacent to the Passenger Vehicle and Truck Search Areas to support search area guards and their activities. Communications to the installation’s central security monitoring station will be provided. The floor plan conforms to the revised plans provided by the Omaha District, Center of Standardization Drawings for Ft. Bliss while the architectural treatment reflects architectural theme and character of the Hospital, where stone and terracotta tile is used in a rainscreen exterior wall system.

3.1.6 Visitors Control Center

The South ACP will have a Visitors Control Center for processing visitors entering onto the installation. Accommodations will be made for three processing personnel. The floor plan generally conforms to the revised plans provided by the Omaha District, Center of Standardization Drawings for Ft. Bliss; however, revisions to the standard plan were made to correct handicapped accessibility issues. Architectural treatment reflects architectural theme and character of the Hospital, where stone and terracotta tile is used in a rainscreen exterior wall system. Curtain wall and glazing systems are to be blast resistant as this facility must comply with ATFP standards.

3.1.7 Color Boards and Renderings

Interior and exterior color boards and renderings can be found within the appendices of this project manual.

3.2 STRUCTURAL

3.2.1 Canopies

The steel canopy structures as described in the previous section will be used for covered canopy areas at both the North and South ACP. All canopies will be designed by HDR.

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There are three free-standing canopy structure types: The ID Check canopies (N&S ACPs), the Search Area canopies (N&S ACPs), and the bus shelter canopy (S ACP only). The ID check point canopy will feature a 35 foot cantilever roof with diagonal support tension rods above and below the roof. Canopy foundations will be drilled piers connected by grade beams. The superstructure for this canopy will composed of tapered and built up structural steel members.

The search area canopy will be primarily composed of hollow structural sections on shallow spot footing foundations.

The bus shelter is a cantilever structure composed of hollow structural sections supported on a mat footing that will also support free-standing advertising panels and a pedestrian bench.

3.2.2 Buildings

A. Foundations

1) The foundation systems will consist of slab-on-grade with stiffened beams.

Subgrade for foundations will be two to three feet of compacted, non-expansive, engineered fill. The geotechnical report from the Ft Worth District of the Corp of Engineers for the Ft. Bliss Hospital Replacement-Infrastructure contains recommendations for removal and replacement of existing subgrade. The amount of fill required below each building foundation will depend on the relative elevations of existing grade and the proposed finished grade.

2) The stiffened mat foundations will be designed per the ribbed mat foundation design criteria found in Appendix E of the geotechnical report.

3) Minimum reinforcing ratios will also be determined for the structures as a function of the joint spacing and applicable codes. In no case will the flexural (tension) reinforcing in slabs, walls, footings, and mats be permitted to be less than 0.18% on the basis of gross cross-sectional area.

B. Superstructure

1) The superstructure for the access control points (ACP) will consist of masonry bearing walls and steel columns supporting steel beams and metal deck. The buildings will also utilized cold formed steel stud framing which will be used primarily for support of architectural elements and as such will not be represented or called out in the structural drawings. The lateral force-resisting system for the building will consist primarily of masonry shear walls. In certain cases, such as the VCC clerestories and the Gatehouse observation areas, steel columns are used in flexure, to distribute lateral forces to masonry shear walls below.

2) Structural steel design will be performed in accordance with the requirements of the American Institute of Steel Construction (AISC), “Specification for Structural Steel Buildings AISC 360-05,” and the UFC 3-301-01.

3) Beams and Columns: Design and proportioning of beams and columns will comply with all applicable standards, including AISC and the UFC 3-301-01.

4) Cold-formed steel design and specification will be performed in accordance with American Iron and Steel Institute (AISI) Standard and UFC 3-301-01.

5) CMU design will be performed by the working stress method in accordance with ACI 530/ASCE 5/TMS 402, “Building Code Requirements for Masonry

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Structures,” and UFC 3-301-01. Special inspection requirements for masonry construction will conform to UFC 3-301-01.

6) ATFP Blast loading requirements will be incorporated in the design of the VCC.

Loads will be provided by Hinman Consulting Engineers, Inc. The Gatehouses will be designed for ballistic requirements only.

3.2.3 Applicable Codes and Specifications

A. International Building Code, IBC 2009 with applicable editions of the code-referenced standards.

B. ASCE 7-05, Minimum Design Loads for Buildings and Other Structures C. UFC 1-200-01 – General Building Requirements with Change 1, 19 July 2011 D. UFC 3-301-01 – Structural Engineering w/ Change 2, 31 January 2001 E. UFC 3-310-04 – Seismic Design for Buildings with Change 1, 22 June 2007 F. UFC 4-010-02 – DOD Minimum Antiterrorism Standoff Distances for Buildings G. Army Access Control Points Standard Design/Criteria H. USACE Southwestern Division Architectural and Engineering Instructions Manual

3.2.4 Material Specifications

Material specifications for structural components and assemblies shall conform to the following values:

A. Concrete and Reinforcing Steel

1) Structural cast-in-place concrete, unless otherwise indicated: 4000 psi compressive strength at 28 days.

2) Cement: Type I or I/II for cast-in-place concrete.

3) Reinforcing steel (deformed bars): ASTM A615, Grade 60. B. Structural Steel

1) W and WT shapes: ASTM A992.

2) Other rolled sections and plates: ASTM A36 or ASTM A572, Grade 50.

3) Square or rectangular tubes (HSS): ASTM A500, Grade B.

4) High strength bolts: ASTM A325, galvanized.

5) Anchor bolts: ASTM F1554, Grade 36.

6) Welding electrodes: AWS D1.1 E70XX.

C. Cold-Formed Steel

1) Cold-rolled sheet steel: A1008/A1008M-00.

2) Studs and tracks: A1003/A1003M-00, 33 ksi minimum yield strength.

D. Masonry

1) Masonry units: ASTM C90, grade N-1, normal or heavy-weight units with a net area compressive strength of 1900 psi.

2) Mortar: ASTM C207, Type S, complying with ASTM C270, Table No. 1 (1800 psi minimum compressive strength).

3) Grout: ASTM C476, design 28-day compressive strength of 2000 psi. 4) Design strength of assembled masonry: f’m = 1500 psi.

3.2.5 Structural Loads

A. Dead Loads:

1) General: Dead loads will be considered resulting from fixed construction, materials, and equipment. Dead loads will be determined and applied in

3-5 accordance with the most current Unified Facilities Criteria (UFC) 3-301-01, and other pertinent standards and vendor-supplied information.

2) Concrete unit weight: 150 pounds per cubic foot (pcf).

3) Steel unit weight: 490 pcf.

4) Roofing dead load: 12-15 psf for a roof system with steel beams and metal deck.

5) Collateral loads: collateral uniform dead loads shall be considered where appropriate to allow provision for items such as HVAC, electrical, ceilings, fire suppression and other small diameter piping, etc, 5-8 psf.

B. Live Loads

1) Live loads are those loads produced by the use and occupancy of the building or structure, and do not include loads such as wind/seismic loads, rain loads, flood loads, soil loads, or dead loads. Minimum uniformly distributed live loads will be as required by UFC 3-301-01.

2) Slab-on-grade: 100 psf

3) Roof: 20 psf (reducible per UFC).

C. Wind Loads

1) General: Wind loads for structural design of main wind force resisting systems and components and cladding shall be determined and applied in accordance with UFC 3-301-01.

2) Wind speed: The minimum 3-second gust design wind speed was provided by UFC 3-301-01 of 90 mph.

3) Importance Factors: The importance factor of 1.15 is used based on an Occupancy Category of III.

4) Exposure Category: Building exposure classification C, as defined by UFC 3301- 01, shall be used for all structures.

5) Building Enclosure: Enclosure classification for building and canopy structures shall be determined in accordance with the UFC 3-301-01. In general, building opening protection shall be designed and specified to resist damage from windborne debris, and buildings will be classified as enclosed. Canopy structures will be classified as open.

D. Soil and Water Loads

1) General: Final soil/backfill unit weights, soil lateral loadings, and design groundwater elevations shall be determined by the Geotechnical Engineer.

Surface water elevations shall be determined by the Geotechnical Engineer. The following values shall be used for design of foundations:

2) Moist Unit Weight of Soil: 110 pcf (100 pcf dry unit weight).

3) Friction Angle, Φ: 30˚.

4) Cohesion: 100 pcf (unless granular fill with less than 12% passing the No. 200 sieve and any soils classifying as non-plastic then shall be taken as 0 pcf).

5) Unit weight of water: 62.4 pcf.

6) Allowable bearing pressure: 2000 psf. 7) Subgrade modulus: 200 pcf.

E. Seismic and Snow Loads

1) Ground snow loads given in the UFC 3-301-01 is 5 psf. The minimum roof snow load for this ground snow load would be 5 psf.

2) Seismic loads shall be determined in accordance with UFC 3-310-04 and ASCE

7-05 mapped spectral accelerations. The 0.2 second spectral response

3-6 acceleration (SS) is 33.4 %g and the 1.0 second spectral response acceleration (S1) is 10.8 %g.

F. Load Combinations

1) Limit state and service-level load combinations for the design of all non-bridge structures shall be as defined in UFC 3-301-01. Limit state design under these load combinations shall comply with applicable codes. G. Refer to Appendix J for structural calculations.

3.2.6 Design Methodologies and Criteria

A. Deflection Limits

1) General: Maximum allowable live load deflections shall be as defined below, unless more restrictive deflection criteria are required for specific equipment.

2) Structural steel framing: Maximum live load deflection for structural steel framing members shall be as indicated below:

i. Roof beams not supporting ceilings or other deflection-sensitive components:

L/240.

ii. Roof beams supporting ceilings or other deflection-sensitive components:

L/360.

iii. Floor beams: L/360. iv. Beams supporting masonry or brick veneer: L/600 or

0.3 IN. v. Steel grating: L/240.

B. Minimum Factors of Safety (Service Loads)

1) Minimum factor of safety against sliding failure: 1.5.

2) Overturning stability: 100 percent of the soil underneath foundations shall be in compression.

3) Minimum factor of safety against overturning (structures on piles, piers, or nonyielding subgrade): 1.5.

4) Minimum factor of safety against global flotation: 1.5.

5) Minimum factor of safety against subgrade failure: as determined by

Geotechnical Engineer.

3.3 MECHANICAL

3.3.1 Design Loads

Cooling and heating load calculations shall be performed using commercially available software with inputs based on RFP criteria, industry standards, and information provided by the architect regarding building components.

Cooling/Heating Load Assumptions Outdoor Conditions:

Elevation 3,918 ft.

Air density 0.0653 lb/cu ft Air specific heat 0.2444 Btu/lb-°F Density-specific heat product 0.9575 Btu/h-cfm-°F Latent heat factor 4,214.8 Btu-min/h-cu ft Enthalpy factor 3.9171 lb-min/hr-cu ft Summer Design dry bulb 98 °F (1%) Summer Design wet bulb 61 °F

3-7

Winter Design dry bulb 24 °F (99%) Summer clearness number 0.20

Winter clearness number 0.20

Carbon Dioxide Level 400

Indoor Conditions in Occupied Areas:

ppm

Summer Design dry bulb 78 °F Summer Design humidity ratio 50 %RH Winter Design dry bulb 68 °F Winter Design humidity ratio 35 %RH

Indoor Conditions in Mechanical/Electrical Rooms:

Summer Design dry bulb 80 °F

Winter Design dry bulb 40 °F (freeze prevention only)

Internal loads:

Room name max. people misc. load

VCC waiting room 11

Processing 3 3 computers, 1 copier/printer

Provost office 1 1 computer

VCC Breakroom 4 refrig, coffee maker, microwave

VCC Comm Room 0 1219 Btu/hr Comm Equip

Office 1 1 computer

Search office waiting 3

Search processing 2 1 computer per person

Search office break room 4 microwave, small refrigerator

Search Office Storage/Comm 0 1058 Btu/hr Comm Equip

Gatehouse Guard Room 3 1297 Btu/hr Comm Equip

Gatehouse Comm Room 0 4944 Btu/hr Comm Equip

Guard Booth 1 461 Btu/hr Comm Equip

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During the hours of 11:00 pm – 6:00 am it is assumed that the occupancy will not exceed 5 people in the Visitor Control Center. Occupant activity level will be sitting, light office work except at Search Office Processing, Guard Room, and Guard Booth which will be standing, light work. Equipment loads in Electrical rooms shall be obtained from electrical plans. Lighting loads will be obtained from the scheduled fixtures in compliance with ASHRAE 90.1.

3.3.2 Infiltration

Air distribution systems for central HVAC systems shall be designed to maintain slightly positive pressure within the areas served in order to prevent or reduce the amount of infiltration of unconditioned air. All air intakes shall be provided with low leakage motorized dampers that shall automatically close when not in use. A vestibule is provided at the main entrance to the Visitor Control Center to buffer the conditioned spaces from the outside air.

3.3.3 Indoor Air Quality Analysis

Fully ducted supply and return systems shall be provided for all occupied conditioned spaces. A vapor barrier shall be provided as separation from conditioned and unconditioned spaces. Areas with potentially harmful fumes shall be kept under negative pressure to draw contaminants away from occupied areas. Outside air intakes shall be maintained more than 10 feet away from exhaust and plumbing vent outlets. Carbon dioxide sensors shall be provided at the Visitor Center to monitor the CO2 and adjust the outside air to maintain acceptable levels. A pressure sensor in the waiting room shall ensure positive pressure is maintained. For the Search Office and Gatehouse, an airflow monitor with modulating damper shall be provided in the outside air duct to maintain constant ventilation air and makeup air for the air exhausted at the restrooms. The humidity shall be controlled to maintain occupant comfort. Air supplied to occupied areas of Visitor Center and Search Office shall be filtered through a minimum MERV 13 filter.

These filter sections shall be provided with differential pressure sensor to indicate fully loaded condition. Cooling coil drain pans shall be sloped to promote proper drainage and constructed of stainless steel or antimicrobial composite material.

3.3.4 Description of Mechanical Systems

The Visitor Control Center contains enclosed office spaces, a processing area, break room, waiting room, and various other small rooms. The Search Offices contain similar spaces. Air handlers in the Visitor Center shall be located above ceiling to serve all occupied areas. Search Office and Gatehouse shall be served by an air handler located in the mechanical room. Supply and return ductwork above ceiling shall be wrapped with R-6 minimum insulation. Occupied areas shall be maintained under positive pressure to reduce contamination from areas with potentially harmful fumes and odors.

The Visitor Control Center shall comply with ATFP requirements. Outside air shall be ducted from roof intake hood. Outside air intake shall be provided with low-leakage damper to automatically close upon activation of emergency shut-down system. HVAC equipment weighing 31 pounds or more (excluding distributed systems such as piping networks that collectively exceed that weight) shall be braced to resist 0.5 times the

3-9 equipment weight in any horizontal direction and 1.5 times the equipment weight in the downward direction.

The New Direct Digital Controls (DDC) shall be provided for each ACP with communication to central campus building automation system. Automated building controls shall be programmed to minimize energy consumption during unoccupied periods and optimize system performance at varying load conditions including initiation of setbacks and warm-up periods for heating and cooling systems. Automated building controls shall monitor potable water usage as well as energy consumption of electricity and natural gas if applicable. Refer to Appendix E for mechanical cutsheets.

3.3.5 Mechanical System Selection Analysis

Computer aided psychrometric analysis shall be used for system selection at full and part load conditions including dehumidification performance under varying internal and external conditions. Additional calculations based on ASHRAE standards shall be performed to help determine optimal heating for energy efficiency and comfort. Ground source heat pumps were considered but found not to be cost effective. Basis of design shall be air source heat pumps for the Visitor Control Center and Search Office.

Gatehouse shall be served by a split DX system. Demand control ventilation shall be considered for the Visitor Control Center. The guard booths shall be served by ductless mini-split heat pumps. Ductwork shall be 1” static pressure class. Fans and air devices shall be selected for low noise. Mechanical rooms shall be provided with insulation in the walls for sound attenuation.

While it has been previously conveyed that USACE Engineering and Construction Bulletin (ECB) 2010-14, issued 28 June 2010 (with energy savings of 40% per ASHRAE 90.1-2007 baseline) is a desired achievement, it is understood that this ECB does not apply to this project. HDR has evaluated several options to achieve maximum energy savings while considering life-cycle-cost effectiveness. The initial focus was a ground loop heat pump system. Preliminary pricing was obtained for borehole drilling and a life cycle cost analysis was conducted. The cost of the system when compared to the energy use savings returned metrics that were beyond what would be acceptable by the Government. As such, HDR is no longer pursuing the ground loop heat pump system.

Currently, the focus is on achieving 30% energy use savings against the ASHRAE

90.12004 baseline as required per EPAct 2005. HDR acknowledges that the ACP structures are very small with limited options for improved energy savings over the advanced baseline systems. We surmise that drilling costs are higher than average because of the remote location of this project. Note that HDR did not evaluate the ground loop system under our sustainable return on investment methodology because the energy use savings is too minimal to warrant the advanced research.

• According to the latest drawings issued by the Center of Standardization (COS), a wall mounted HVAC unit is shown to serve each Guard Booth. This type of unit is typically referred to as a packaged terminal air conditioner (PTAC) or a packaged terminal heat pump (PTHP).

• The most efficient wall mounted PTHP (that we could find) that meets the cooling capacity requirements and fits the given dimensions has an EER of 11.0. This does not meet EPAct.

3-10

• Our proposed design includes a wall mounted ductless split DX heat pump with an efficiency of 19.2 SEER.

• One detriment to energy savings is…