Clarksburg CH Phase 1 95 Percent Basis of Design.pdf

Clarksburg Courthouse Phase 1 Design Project

Clarksburg Federal Building & Courthouse

Clarksburg, WV

General Services Administration

BASIS OF DESIGN

95 Percent Submission

19 July 2022

Contract Number: GS‐03‐P‐17‐DX‐D‐0003

Order Number: 47PD0220F0017

Our Ref: 164.59 7900 Westpark Dr., Suite A405 McLean, VA 22102

Clarksburg Courthouse Phase 1 Design Project Clarksburg Federal Building & Courthouse | Clarksburg, WV

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TABLE OF CONTENTS

Chapter 1

ARCHITECTURAL .................................................................................................................. 1-1

Chapter 2

FIRE PROTECTION................................................................................................................ 2-1

Chapter 3

STRUCTURAL ....................................................................................................................... 3-1

Chapter 4

MECHANICAL ...................................................................................................................... 4-1

Chapter 5

PLUMBING .......................................................................................................................... 5-1

Chapter 6

ELECTRICAL .......................................................................................................................... 6-1

Appendix A

ARCHITECTURAL CALCULATIONS ........................................................................................... A

Appendix B

MECHANICAL AND PLUMBING CALCULATIONS ..................................................................... B

Appendix C

FIRE PROTECTION CALCULATIONS ......................................................................................... C

Appendix D

ELECTRICAL CALCULATIONS ................................................................................................... D

Appendix E

STRUCTURAL CALCULATIONS ................................................................................................. E

Appendix F

SEISMIC EVALUATION CALCULATIONS ................................................................................... F

Appendix G

GEOTECHNICAL ENGINEERING REPORT................................................................................. G

Appendix H

BLAST DESIGN REPORT .......................................................................................................... H

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CHAPTER 1

ARCHITECTURAL

1. INTRODUCTION

.1 Architectural Scope of Work Summary

a. The Clarksburg United States Courthouse is a historic building in downtown Clarksburg, West Virginia. The original building, consisting of three stories plus an attic and basement, was constructed in 1931. A major one-story addition (the annex) with a partial basement was constructed to the west and north in 1969. The original 1931 structure is a concrete-encased steel frame with masonry exterior bearing walls and reinforced-concrete floor slabs supported by integral reinforced concrete joists. The annex is a steel frame structure with reinforced concrete block and brick exterior walls and a cellular steel roof deck. The annex roof framing was engineered to serve as framing for a future second floor.

b. The building originally served as a post office and mail sorting facility operated by the United States Postal Service (USPS) on the first floor and as a courthouse for the US District Courts (USDC) on the upper two floors. In later years, the US Marshals Service (USMS) also occupied a portion of the first floor. All three occupant groups occupied ancillary spaces in the basement.

The USPS has recently vacated the building, and the USDC and the USMS are now the only two occupants.

c. Recently, the GSA purchased the building from the USPS and is undertaking this project to expand the courthouse function into the now-vacant first-floor USPS space. This is the first phase of a larger prospectus project which will also improve the layout of the existing USDC spaces on the upper floors and remodel the existing USMS space to improve its functioning and to better connect it with the rest of the building.

d. Phase I – the current project – includes the following architectural scope of work:

• Construct a new courtroom, new judge’s chambers, and all related support spaces on the 1st floor, including related structural work.

• Perform some limited modifications to the existing USMS space to accommodate the new 1st floor Courts spaces.

• Construct new public restrooms on the 1st floor.

• Reconstruct part of the north exterior wall of the annex to allow the installation of windows.

• Extend an existing elevator shaft running between the basement and the first floor up to the 2nd and 3rd floors. Replace the existing elevator cab with a new passenger elevator cab for use by the judges and judicial staff.

• Construct restricted-access corridors for judges’ use at the 2nd and 3rd floor elevator entrances.

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• Construct a new hoistway for a future elevator to transport prisoners from the basement to the first floor.

• Construct a mechanical penthouse and a mechanical equipment platform on the annex roof.

• Extend the existing fire stair at the north side of the building up to the roof to bring the building into compliance with section 3.3.7.3 of GSA P- 100 which requires an interior permanent stair to allow access to roof-mounted equipment.

• Replace a limited number of existing windows with new blast-resistant windows.

e. References:

• U.S. Courts Design Guide (Edition 2007)

• Standard Level Features and Finishes for U.S. Courts Facilities (revised March 1996) (except where superseded by U.S. Courts Design Guide)

• USMS Publication 64: Requirements and Specifications for Special Purpose and Support Space Manual (revised January 2014)

• P100 Facilities Standards for the Public Buildings Service (July 2018)

• International Code Council (ICC) series of construction codes, (IBC 2018) with Chapter 10 egress superseded by NFPA-101 2018 and includes reference to NFPA 13 (2019)

• NFPA 101 Life Safety Code (2018)

• Architectural Barriers Act Accessibility Standards (ABAAS)

2. INCREASED SPACE

.1 In 2015, the Fourth Circuit Judicial Council approved a revised AnyCourt program of space requirements for the Clarksburg United States Courthouse. The program identified the need for additional courtrooms and associated support space within the building to support the functions of the US District Court in Clarksburg for the next 10 to 30 years. This project is the first phase of this overall program, and will provide a new courtroom and associated spaces including a judge’s chambers, a trial jury suite, and new public restrooms on the first floor.

3. SEPARATION OF CIRCULATION

.1 The present-day layout of the courthouse has a nearly total lack of separation between three key user groups: 1) members of the public, including attorneys, and family members and acquaintances of parties to the trials; 2) members of the judiciary, their staff, and empaneled jurors; and 3) defendants or witnesses who are in custody. These three groups now use common corridors to circulate through the building and may encounter one another as they do so, a major security risk. The circulation developed in the overall prospectus project will keeps these three groups completely separated. Though this complete separation will not be possible until the full prospectus project is finished, the current Phase 1 project lays the groundwork for it and will, by itself, provide partial separation and better control over circulation compared to what exists now.

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4. IMPROVED SPACE LAYOUT

.1 There are some additional inconveniences with the current building layout:

a. The USMS offices are not directly connected to the rest of the first floor. From the first-floor USMS space, one must climb a set of stairs to the second floor, walk to the opposite end of the building, and walk down another set of stairs to get to the main section of the first floor, or to go to the basement.

b. The route prisoners (defendants or in-custody witnesses) must take, while under escort by US marshals, from the main holding cells to the second and third floor courtrooms is indirect and shares paths used by the public, judicial staff, and empaneled jurors.

.2 This project, though it does not totally alleviate these problems, takes the first steps towards solving them. The limited work done in the USMS offices prepares some ground for future phases of work which will connect the USMS spaces more directly to the rest of the building and provide efficient, secure circulation for officers and prisoners. The separated circulation being developed for this project will be extended in future phases, resulting in a building-wide system of secure and separated corridors, staircases, and elevators.

5. HISTORIC PRESERVATION

.1 The Clarksburg United States Courthouse has historic significance in two respects: it is architecturally-significant in its own right, and is also a major contributing structure to the Clarksburg Downtown Historic District (CDHD). Most of the interior work under this project will happen in the 1969 annex which is not historically or architecturally significant either inside or outside. But the new courts program in the former USPS space will be a radical departure from the historic use of the building’s first floor, and will greatly re-shape the visitor’s experience in using the building.

.2 The existing facades of the two main street elevations – the south (front) and east elevations - of the original 1931 structure will be preserved, as will the historic main lobby. But the spaces beyond the lobby, which are now vacated mail workrooms and offices, will be newly built-out to accommodate the new courts program. The interior designs of these new public spaces – the connecting corridor, the interior lobby outside the courtroom, and the courtroom itself – will, without mimicking historic architecture, take their design sense from the architectural heritage, character, and materials of the historic building so that the new interior spaces seem like natural extensions of the old.

.3 The project will involve changes to parts of the north (rear) elevations of the 1931 building and the 1969 annex. These changes will need to be appropriate to the architecture of the historic building and to the architecture and sense of place embodied in the CDHD. The changes need not appear historically derivative, but must be of a high architectural quality, and sympathetic to their context.

6. ARCHITECTURAL SCOPE OF WORK

.1 Interior Space Layout

a. New space for US District Courts: In order to gain new courtroom capacity as quickly as possible, the current project was broken out as the first phase of the overall prospectus project. Under this project, the following new spaces will be added:

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• First floor:

- District courtroom

- Trial jury suite

- Attorney / witness rooms (2)

- Court reporter offices (2)

- Judge’s chambers suite with conference room

- Court staff restrooms

- Public restrooms

- Accessory storage and utility closets

- Circulation corridors for public, courts, and USMS.

• Second and third floors:

- Restricted corridor for courts.

b. In addition, existing partial-height aluminum and glass partitions (which date from 1969 or later) in the historic main lobby will be removed to improve the flow of space through the lobby and to provide a more convenient and larger area for building security. This is also a first step towards restoring the lobby, which will be completed under future project phases.

.2 Modifications to US Marshals Service 1st floor space: The USMS offices will be reconfigured in a later phase of the overall project, but some limited work on the USMS space is required in the current project to make room for the new courts’ spaces. To accommodate the new main corridor outside the new courtroom, one existing isolation cell will be moved and reconfigured and the prisoner processing area will be moved. These modifications will all be permanent and are designed to be incorporated into the future phases of the overall project as built.

a. Wall materials and construction: All new construction in the USMS spaces will comply with USMS Publication 64, Section B, as follows:

• All walls will extend from floor to structural slab above.

• For the 95% submission, walls have been designed to be constructed with 6” thick glazed CMU (ASTM C90 Type 1 and ASTM C744) to comply with USMS Publication 64 requirements. However, a request was made to use an insulated stainless steel panel system in lieu of CMU to reduce the weight of the walls on the existing structure and to better coordinate with the intricate MEP system below the floor slab. This system has not been included in the 95% submission since the A/E team received late authorization to proceed with the insulated stainless steel panel system.

Significant architectural redesign efforts will be required to make the change at this time.

• Walls will be vertically reinforced with one No. 4 bar every 24” o.c. and horizontally reinforced with two No. 4 bars every 24” o.c.

• All joints and cores will be solidly grouted with mortar compliant with

ASTM C270.

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• Walls will be built with integral cove bases and rounded inside and bullnose outside corners.

• Glazing colors will be chosen from manufacturer’s standard range (light neutral gray, blue, sand, or beige).

• All sealant joints in USMS wall construction will be detention-grade non-pick caulking.

.3 Modifications to basement: The architectural scope in the basement consists of the following:

a. Construction of a new electrical room in the northeast corner of the annex basement.

b. Construction of a new secure corridor and sound lock leading to the hoistway of a dedicated prisoner elevator which will connect to the 1st floor courtroom in a future phase of the prospectus project. This corridor and the elevator hoistway will be constructed as described in item 2.a. above.

c. Construction of an elevator machine room.

d. An existing freight elevator shaft running between the first floor and basement will be extended up to the 2nd and 3rd floors. The existing freight elevator cab will be removed and replaced with a new passenger elevator.

e. Modifications to the existing fitness room and court storage room to accommodate the above two items.

.4 Interior design: Several of the new interior spaces will be ceremonial and formal in nature, and will be highly visible to the general public or to individuals who are party to trials at the courthouse. These include the new main corridor leading from the existing lobby to the new courtroom; the new courtroom; and the new judge’s chambers. The interior design drivers are the acknowledgement of the historic building housing these new spaces and the wish to create a harmonious experience for the visitor as he or she sees the building from the exterior, enters the historic lobby, and then proceeds into the new corridor and enters the new courtroom. The new spaces should match the level of dignity of the existing ceremonial spaces – in particular the lobby and the existing second-floor courtroom – and the high quality of the existing materials while asserting a character of their own.

a. Main Corridor: The walls will be divided into sections that are analogous to the lobby wall divisions: baseboard, wainscot, dado rail, upper wall, and cornice.

The baseboard will be wood. The wainscot is to be determined. The chair rail will be a stripe of wood. The cornice will be a simplified version of the lobby cornice, matching the profile but omitting the triglyph and guttae ornamentation.

b. Courtroom: The courtroom will have a wood wainscot and chair rail around the full perimeter of the room that replicates the chair rail and lower row of paneling in the existing second-floor courtroom. The remaining height of the courtroom walls will be covered in fabric-wrapped wall panels with beveled edges suggestive of the rusticated stone blocks at the exterior of the building on the first floor. Rectangular pilasters around the room will be in a simplified or stripped Tuscan order with blue synthetic natural stone inset panels, design cues taken from the stripped classical building exterior with its prominent terra cotta spandrel panels. A trabeated wooden aedicule behind the judge’s

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c. Judge’s Chambers: The judge’s chambers will have a wood wainscot and chair rail similar to the courtroom. The walls above the wainscot will be vinyl covering.

7. HORIZONTAL CIRCULATION

.1 Separated circulation at the 1st floor: The 1st floor will have separated circulation as follows:

a. Public circulation will lead from the main entrance, through the main lobby, to the entrance to the new district courtroom. The building’s main staircase and elevator will continue to be directly accessible from the main lobby.

b. Restricted circulation (for judges and court staff) connects the new courtroom to the new district judge chambers, and then onward to a vestibule and building entrance which leads directly to the parking lot. This allows judges and court staff to park, enter the building, and walk to the chambers and the courtroom without using any entrances or corridors used by the public.

c. Secure circulation (for prisoners under USMS escort) leads from the existing USMS sally port to the existing holding cell area.

d. From the holding cells, prisoners will be escorted along the restricted (judges’) corridor system to the courtroom. Because of this shared use, intersections are controlled by vestibules which will ordinarily be arranged to allow free passage along the restricted corridor while preventing access (by way of a locked door) from the holding cell area. When marshals are escorting a prisoner to or from the courtroom, they will clear the restricted corridors, close the vestibule doors, and open the door from the secure corridor. The marshals will then escort the prisoner to the courtroom holding cell which is accessible from the restricted corridor. Once the prisoner is in the cell, the marshals will return the vestibule doors to their normal arrangement. A similar process will be followed when the prisoner returns to the main holding cells.

e. This process will only be necessary until the additional phases of the project are built. Future project phases include a dedicated elevator to bring prisoners directly to the courtroom holding cell. This will eliminate the need for the restricted corridors to do double-duty as a secure corridor.

.2 Judges’ corridors at 2nd and 3rd floors: An addition will be constructed at the recessed north (rear) side of the 1931 building to contain new restricted corridors for judges and judicial staff. These corridors will lead from the new judges’ elevator (see below) to existing judges’ chambers on the 2nd and 3rd floors. These corridors will eliminate the need for judges to use the public hallways to enter and leave the building or to circulate among the courtrooms on the various floors.

The addition will go in front of a plain, unadorned brick wall which was never intended to be highly visible, and which became even less visible with the addition of the annex in 1969. The exterior appearance is designed to harmonize with the 1931 building, the experience of the users within the building, and engineering and budgetary constraints and requirements.

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The proposed exterior treatment will consist of metal panel wall cladding and ballistic and blast-resistant windows similar in appearance to the existing windows at the 1931 building with fritted glass for security and privacy. The fenestration will incorporate terra cotta panels at the spandrel panels. The metal wall cladding color will complement the color of the surrounding historic brick walls.

Three large courtroom windows along the wall were infilled with brick in 1969, but two remaining windows bring daylight into a suite of offices for judicial staff.

Generous use of glass in the corridor addition will make the corridor a more pleasant space and will admit borrowed daylight to the staff offices.

8. VERTICAL CIRCULATION

.1 New judges’ elevator: An existing freight elevator shaft running between the first floor and basement will be extended up to the 2nd and 3rd floors. The existing freight elevator cab will be removed and replaced with a new passenger elevator for use by the judges and judicial staff. In conjunction with the restricted corridors, this elevator will allow judges full access to all the courtrooms, chambers, and associated support spaces, plus the judges’ reserved building entrance, without requiring the use of the public corridors.

.2 North stair tower extension: In order to comply with GSA P-100 Section 3.3.7.3, this existing stair tower will be extended to the roof to create a permanent enclosed staircase for access to roof-mounted equipment and the mechanical platform and penthouse.

9. PERIMETER WALL RECONSTRUCTION

.1 Reconstruction of north annex wall: This wall will be partially rebuilt to accommodate blast requirements and to allow new windows to bring daylight into the new judges’ chambers and judicial staff offices. The rebuilt portions will be faced with brick to harmonize with the rest of the building.

10. FENESTRATION

.1 New windows at north annex wall: New windows will be introduced into the rebuilt portion of the wall to bring daylight into the judge’s and law clerks’ offices.

.2 Replacement windows along east wall: In conjunction with the project’s security specialists, some of the windows along the east wall of the 1931 building at the 1st floor include blast-resistant windows.

11. ROOFTOP CONSTRUCTION

.1 New mechanical penthouse and platform: This pair of structures will be built side-by-side on the existing annex roof to accommodate mechanical equipment serving the new courtrooms, chambers, and support spaces. The platform will be built on elevated dunnage. The fully-enclosed penthouse will sit directly on top of the roof deck.

The penthouse and the platform are continuously surrounded by a louver screening system to unify the appearance of the two structures and to allow vents in the penthouse walls to be placed anywhere without concern for their appearance. The size, shape, and color of the louver screening system is chosen to make the penthouse and platform structure an attractive design element of the roof when seen from the street and from the upper windows of the courthouse.

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Though replacement of the annex roof is not in the scope of this project, it is anticipated and assumed that a separate roof replacement project for the annex, currently in design under another contract, will include full compliance with Section

3.3.7.8 including permanent railings or other appropriate safety equipment.

.2 Roof systems: The project contains a minor amount of roof work of its own. New roofs include:

a. New roof over the judges’ corridor addition (Roof A).

b. New roof over the extended fire stair tower (Roof B).

c. Roof over the new mechanical penthouse (Roof C).

.3 Existing roofs which will require modification include:

a. Small 1st floor roof within the rear recess of the 1931 building (Roof D). The new corridor addition will cover a large percentage of this small roof, and the extended judges’ elevator shaft will penetrate it. The remaining roof area is part of a separate roofing project.

b. The main 1st floor roof (over the annex) is slated to be replaced under a separate project. At this time, it is unknown whether the original roof will be in place at the start of construction of this project or whether a new roof to comply with the requirements of this project will have been installed.

.4 On the basis of long-proven durability, widespread familiarity among roofing installers, and reasonable expense, an SBS (Styrene-Butadiene-Styrene) Modified Bitumen (MB) roof system will be specified for the new roofs. This system is redundant, long-lasting, straightforward to detail, easy to maintain and, if necessary, easy to repair. Mineral cap sheets provide a clean, attractive appearance for roofs which are visible from upper stories. This system complies with the P100 requirement that roofing systems be “highly resistant to physical damage.”

.5 Applicable codes and standards as required by P100 include: NRCA Roofing Manual;

International Building Code, Chapter 15; International Plumbing Code, Chapter 11.

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CHAPTER 2

FIRE PROTECTION

1. APPLICABLE CODES

.1 In accordance with PBS-P100, the Facilities Standards for the Public Buildings Services applies to the General Services Administration system dated July 2018.

.2 Per PBS-P100, the Facilities Standards for the Public Buildings Services

i. Use the 2018 International Building Code [Para. 1.3]

ii. Use the 2018 International Fire Code (IFC) [Para. 1.3]

.3 National Fire Protection Association (NFPA)

i. 2019 NFPA 13 Standard for the Installation of Sprinkler Systems

ii. 2017 NFPA 70 National Electric Code

iii. 2019 NFPA 72 National Fire Alarm and Signaling Code

iv. 2018 NFPA 90A Air-Conditioning and Ventilating Systems

v. 2018 NFPA 101 Life Safety Code

2. BUILDING CODE AND LIFE SAFETY

.1 Phasing

a. The project is part one of multiple phases. The basement will have new building systems installed along with changing the existing fitness space into an elevator shaft and electrical room. The first floor will have a new courtroom, judge’s chambers, and associated support areas. A corridor and elevator will be constructed on the second and third floor.

.2 Classification for Existing Building Scope of Work

a. The project will meet P100 section 1.2.1 for alterations. The project is an alteration level II.

b. The project will be classified as a modification and a historic building per NFPA 101

Chapter 43. All new work and materials will meet new construction criteria including but not limited to IBC criteria. The building will not be occupied during the alteration level II work.

c. The facility is listed on the national register of historic places. Alterations to the facility will comply with the national historic preservation act. Exterior alterations, even to the annex, will be sympathetic to the district’s architectural character.

.2 Building Construction

a. The historic portion of the facility most closely resembles a type IB construction in accordance with IBC Chapter 6. The annex addition most closely resembles a type IIB construction in accordance with IBC Chapter 6. The building construction in it’s entirety will be classified as construction type IIB.

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.3 Occupancy Classification

a. The building occupancy classification will change due to this project.

b. Classifications will be in accordance with IBC chapter 3 and NFPA 101 chapter 6 as follows:

i. IBC – Assembly (A-2), Assembly (A-3), Business (B), Institutional (I-3), Storage (S-

2)

ii. NFPA 101 – Assembly, Business, Detention & Correctional condition IV, Storage

.4 Occupancy Separation

a. Building occupancy will be mixed use non-separated.

.5 Allowable Building Area –The area calculation below assumes that GSA FPE will recognize a future project fully sprinklering the facility will be what is reflected below.

The current building is not fully sprinklered. The maximum building allowable area is the multiplication of the maximum floor area of a fully sprinklered building multiplied by three (3).

a. The max allowable building area is 106,875 (35,625SF X 3).

b. The total building area is approximately 54,395 square feet.

.6 Allowable Floor Area – once fully sprinklered.

Table 1: Allowable Floor Area

Occupancy Classification

Base Allowable Area, SF

Sprinkler Multiplier

Frontage Multiplier

Allowable Area, SF

Assembly 9,500 3 .75 35,625

a. The max allowable floor area is 35,625 square feet.

b. The first-floor area is approximately 34,725 square feet.

.7 Allowable Building Height – once fully sprinklered.

a. The max allowable building stories/height is for Assembly occupancy is 3 stories/75 feet (above grade).

b. The max allowable building stories/height is for Storage occupancy is 4 stories/75 feet (above grade).

c. The building stories/height is 4 stories/51 feet. The maximum Assembly stories is

3/75

d. Stories

i. Basement – below grade

ii. First floor – above grade

iii. Second floor – above grade

iv. Third floor – above grade

v. Attic – above grade

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e. The attic is separated from the rest of the building with a 2-hour fire resistance rated horizontal assembly.

.8 Fire Resistance Rating

Table 2- Required Fire Resistance Ratings (per IBC Table 601)

Component Required Fire Resistance Rating, Hr.

Primary structural frame 0 hours

Bearing walls, interior 0 hours

Bearing walls, exterior 0 hours

Nonbearing walls and partitions, exterior 0 hours

Nonbearing walls and partitions, interior By other criteria

Floor construction and secondary members 0 hours

Roof construction and secondary members 0 hours

The existing fire resistance ratings will not be modified under this contract.

Floor construction in the historic portion of the building is assumed to have a 2-hour fire resistance rating. This is not required for the overall building construction type IIB.

.9 Occupant Load Factors

a. Occupant load factors will be in accordance with NFPA 101 Table 7.3.1.2

Table 3 Occupant Load Factor

Occupancy Classification

Occupancy Use Occupant Load Factor

Assembly Bench seating 18 in. / person

Assembly Fitness equipment 50 sf / person | Gross

Assembly Fixed seating Per # of seats

Assembly Less concentrated 15 sf / person | Net

Assembly Library reading 50 sf / person | Net

Assembly No occupants – courthouse areas without seating (courthouse occupant load will be defined by seating)

0 occupants

Business Collaboration > 450 sf 15 sf / person | Gross

Business Collaboration < 450 sf 30 sf / person | Gross

Business Less concentrated 150 sf / person | Gross

Detention & Correctional

Detention and correctional 120 sf / person | Gross

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Storage Mechanical, electrical, other building equipment spaces and storage

500 sf / person | Gross

.10 Occupant Load

Table 4 Occupant Load

Basement Floor

Occupancy Classification

Occupancy Use Group Occupant Load Factor

Area Occupant

Load

Business Fitness equipment 50 sf/person 1,081 sf 27

Business Collaboration < 450 sf 30 sf/person 637 sf 22

Business Less concentrated 150 sf/person 6,207 sf 45

Storage In Non- Storage 500 sf/person 11,860 sf 23

Grand Total 19,785 sf 117

First Floor

Occupancy Classification

Occupancy Use Group Occupant Load Factor

Area Occupant

Load

Assembly Bench seating 18 in./person 120 sf 75

Assembly Fixed seating Per # of seats 158 sf 14

Assembly Less concentrated 15 sf/person 360 sf 30

Assembly No occupants n/a 1,300 sf 0

Business Collaboration > 450 sf 15 sf/person 560 sf 38

Business Collaboration < 450 sf 30 sf/person 1,011 sf 34

Business Fitness Equipment 50 sf/person 386 sf 8

Business Less concentrated 150 sf/person 17,559 sf 110

Detention & correctional

Detention & correctional

120 sf/person 2,704 sf 23

Storage In Non- Storage 500 sf/person 11,514 sf 24

Grand Total 34,725 sf 356

Second Floor

Occupancy Classification

Occupancy Use Group Occupant Load Factor

Area Occupant

Load

Assembly Bench seating 18 in./person 138 sf 60

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Assembly Fixed seating Per # of seats 158 sf 16

Assembly Less concentrated 15 sf/person 595 sf 40

Assembly Library reading 50 sf/person 841 sf 17

Assembly No occupants n/a 692 sf 0

Business Collaboration < 450 sf 30 sf/person 1,507 sf 51

Business Less concentrated 150 sf/person 7,011 sf 47

Detention & correctional

Detention & correctional

120 sf/person 156 sf 2

Storage In Non- Storage 500 sf/person 2,333 sf 5

Grand Total 13,477 238

Third Floor

Occupancy Classification

Occupancy Use Group Occupant Load Factor

Area Occupant

Load

Assembly Less concentrated 15 sf/person 1,528 sf 102

Business Collaboration < 450 sf 30 sf/person 1,289 sf 43

Business Less-concentrated 150 sf/person 5,240 sf 35

Storage In Non- Storage 500 sf/person 363 sf 1

Grand Total 8,420 sf 182

Attic

Storage In Non- Storage 500 sf/person 7,670 sf 16

Grand Total 7,670 sf 16

.11 Egress Capacity Factors

a. Egress capacity factors will be in accordance with NFPA 101 Table 7.3.3.1.

i. Level components – 0.2 in/person

ii. Stairs – 0.3 in/person

.12 Exit Capacity

Table 5 - Exit Capacity

Basement Floor

EXIT Door Width, inches

Stair Width, inches

Allowable Exit Capacity, people

Exit Capacity, people

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Exit stair 1 36 52 173 58

Exit stair 2 36 48 160 59

Total 333 117

First Floor

EXIT Door Width, inches

Stair Width, inches

Allowable Exit Capacity, people

Exit Capacity, people

Courthouse door 36 n/a 180 48

Exit stair 2 36 48 160 113

Exit stair 3 36 48 160 50

Loading dock ramp

48 (ramp width) n/a 100 40

Loading dock stair

36 30 100 40

Vestibule 101 (right)

60 n/a 114 37

Vestibule 101 (center)

60 n/a 113 38

Vestibule 101 (left)

45 (ramp width) n/a 113 37

Total 1300 356

Second Floor

EXIT Door Width, inches

Stair Width, inches

Allowable Exit Capacity, people

Exit Capacity, people

Exit stair 1 36 52 173 116

Exit stair 2 36 48 160 5

Exit stair 3 36 48 160 117

Total 493 238

Third Floor

EXIT Door Width, inches

Stair Width, inches

Allowable Exit Capacity, people

Exit Capacity, people

Exit stair 1 36 52 173 91

Exit stair 3 36 48 160 90

Total 333 181

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Attic

Exit stair 4 n/a 48 160 16

Total 160 16

Note: Per NFPA 7.3.1.1.2, maximum exit capacity from front exit (Vestibule 101) can be no more than 340 people to match rear exit (Exit stair 2 and new courthouse door).

.13 Means of Egress (NFPA 101) – once fully sprinklered

Table 6 - Common Path of Travel

Occupancy Maximum Common Path of Travel, feet

Common Path of Travel, feet

Reference

Assembly 20 (X > 50 occupants) 75 (X ≤ 50 occupants) n/a 12.2.5.1.2

Business 100 38 38.2.5.3.2

Detention & Correctional

100 50 22.2.5.3

Storage 100 96 (Basement) Table 42.2.5

Table 7 - Travel Distance

Occupancy Maximum Travel Distance, feet

Travel Distance, feet

Reference

Assembly 250 n/a 12.2.6.2

Business 300 138 38.2.6.2

Detention & Correctional

150 (from room door required as exit access)

22.2.6.2

22.2.6.4

Storage 350 136 Table 42.2.6

Table 8 - Dead End

Occupancy Maximum Dead End, feet

Dead End, feet Reference

Assembly 20 20 12.2.5.1.3

Business 50 38 38.2.5.2.2

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Detention & Correctional

50 n/a 22.2.5.2

Storage 100 n/a Table 42.2.5

.14 Number of Exits

a. Per NFPA 101 section 7.4.1.1, each story will have at least two (2) separate exits and at least 2 separate accessible exits. See the life safety drawings for additional information.

b. An additional exterior exit door will be added adjacent to stair 2 on the first floor.

This door will be added to accommodate increased occupant load from courthouses added during future phases.

.15 Exit Remoteness

a. Per NFPA 101 section 7.5.1.3.2, exits will be located more than ½ the building diagonal.

.16 Finishes

a. Per NFPA 101 chapter 38.3.3.2, minimum wall and ceiling finish will be as indicated below:

i. Walls and ceilings – Class A, Class B, or Class C

ii. Floors – Class II

.17 Emergency Lighting

a. Per NFPA 101 section 38.2.9, emergency lighting will be provided in accordance with

NFPA 101 section 7.9.

b. Emergency lighting will have a 90-minute backup. See life safety and electrical sheets for emergency light locations.

.18 Exit Signage

a. Per NFPA 101 section 38.2.10, means of egress shall have signs in accordance with

NFPA 101 section 7.10.

b. Exit signs with directional arrows will be provided. See life safety and electrical sheets for exit sign locations.

2. FIRE PROTECTION

.1 There is an existing partial wet-pipe sprinkler system and interior standpipe installed in the facility. Sprinkler protection is provided in most of the basement storage and in the annex on the first floor.

.2 The existing fire suppression incoming water supply is provided by the local municipality.

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.3 A 6-inch water line comes into the mechanical room, through a DCDA 6-inch Colt 300- BF, which is separated by 6-inch Victaulic 702 butterfly valves.

.4 A 4-inch fire department connection connects to the riser.

.5 An interior standpipe class III is located throughout the facility. The hose connections are incorrectly mounted at the current height. Connections are 2.5-inch and per NFPA 1963. Hose connection should be mounted no more than 4 feet above ground.

.6 Existing sprinklers are fusible links in the historic and industrial area and frangible elements in the addition office. Institutional spaces are provided with institutional sprinklers. The loading dock does not have sprinklers. Sprinkler spacing, where located, is spaced in accordance with NFPA 13 criteria.

.7 Portable fire extinguishers are 4-A:60-B:C and are charged as of the survey date.

Extinguishers should be relocated and provided with proper signage. Locate them along the path of travel. Extinguishers should be kept out of the detention and correctional area but placed in a controlled space.

.8 New sprinklers will be provided throughout the area of work and throughout the first floor and basement. Sprinklers will be quick response and ordinary temperature. The institutional area will have institutional sprinklers.

.9 New zone control assemblies will be provided for the elevator machine rooms, electrical room, for the basement and first floor. Zone control assembly will be monitored by the fire alarm system.

.10 The fire department connection will be moved to a free-standing connection and the existing wall mount will be removed.

.11 New zone control assemblies will be provided in stair 2 for the first floor.

.12 A waterflow test was conducted by the Clarksburg, WV Water Authority. Test was conducted 09 July 2020.The following information was found:

a. Static pressure 100 psi

b. Residual pressure 85 psi

c. Flowrate of 1000gpm.

3. FIRE ALARM

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.1 The existing Siemens FireFinder XLS fire alarm system control panel is in the basement.

A remote fire alarm annunciator is in the main lobby on the first floor. A redundant fire alarm control panel is in the USMS space.

.2 The fire alarm system went through a recent correction to remove all trouble conditions. The testing paperwork can be observed adjacent to the panel next to the fire alarm control panel in Photo 1. The fire alarm system does not report to a monitoring station. There are some existing bells located in the facility which have been abandoned in place.

.3 Fire alarm initiation devices are located throughout the facility. Manual pull stations are located at the exits although they are mounted at 50-inches. Some pull stations are mounted below 48-inches in the basement. Pull stations are double action and red.

Plastic covers will be placed on manual pull stations per P100 criteria.

.4 Notification appliances are provided in the facility. Audible and visual appliances are located in general areas and in courtrooms. The existing fire alarm system has horns for audible and strobes for visual notification. Notification is provided in the detention and correctional space. Notifying the jailed occupants can be panic inducing scenario where a controlled environment is required. NFPA 72 allows fire alarm notification appliances to be kept out of prisoner areas. Notification appliances are a combination of wall and ceiling mounted. They are a mix of red and white appliance colors.

.5 The fire alarm wiring appears to be installed in conduit. Wiring between equipment seems to be class B. The following initiates the fire alarm.

a. Sprinkler water flow

b. Manual pull station

c. Smoke detector

.6 The fire alarm system monitor modules and control modules connect to the fire suppression system, elevator, and HVAC system shut down. Emergency system connections to the fire alarm and detection system are as follows:

a. Elevator recall on smoke detection (lobby and machine room).

b. HVAC shutdown on duct smoke detection (installed on supply side).

.7 The existing fire alarm system does not provide emergency communication capability required by the US Court Design Guide. Speakers are required throughout the facility with acoustically distinguishable space indicated at minimum levels as required by NFPA 72.

.8 A new emergency voice fire alarm system will replace the existing fire alarm system.

Wiring will be class A and in conduit. Notification will be through speakers. Equipment will be white. Intelligibly will be met with a minimum common intelligibility score of 0.7

Summer Consultants, Inc. 2-11 throughout the space. The fire alarm control panel will be provided in a 1-hour fire resistance rated room. A new fire alarm control panel will be provided in the USMS prisoner control area.

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CHAPTER 3

STRUCTURAL

PART 1 - SCOPE OF WORK

1.1 STRUCTURAL SCOPE

1. The building was determined to have insufficient capacity to meet minimum requirements for seismic resistance, due to the removal of walls and lack of diaphragm connection where the 1960 roof structure meets the original second floor. GSA PBS-100 requires that the building should be strengthened according to ASCE-41. As described in the feasible study, we anticipate that this will involve the addition of new bracing elements or shear walls, possibly in the walls surrounding the new elevator, and strengthening the diaphragm connection with additional epoxied dowels and structural steel elements. During the pre-design phase, the seismic loads were generated, and the building analyzed using ASCE-41 requirements. Existing elements such as the brick walls and their connection to the floor structure were investigated to determine the probable quantity and location of new strengthening elements sufficient to meet the minimum seismic requirements. The results of this work are summarized in the previous seismic report. While the phase one area includes only part of the space likely affected by seismic repairs, the seismic evaluation and design of repairs for the building must be done as a whole. Details of repairs completely outside of phase one were be developed to a concept level as explained in the previous report with the remaining development left to be coordinated with other work in the later phases.

2. A new courtroom within the existing post office space will be added. The courtroom includes removing 2 columns, adding two new columns supported on new micropile foundations, and strengthening the floor framing to transfer the load to the new columns. One of the new columns is located adjacent to a proposed elevator that is not in phase 1, so this column foundation will need to account for a future elevator pit. A second future courtroom is proposed for a future project, but this also requires relocation of 2 columns. Since the work involved in this column relocation is similar to the work for the first courtroom, we have included for the design and construction of the second courtroom column transfer in our proposal.

3. Blast hardening for the first floor exterior walls, north and east perimeter only, both historic and non-historic will be upgraded for blast in phase 1. Floors 2 and 3 and all other first floor exterior walls will be upgraded in future phases. The interior walls separating the Courts Sally Port from adjacent occupied space will also be designed for blast as well as any exposed adjacent columns will be hardened to resist blast.

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McMullan utilized the design requirements and concepts provided by ARA and developed those into construction drawings.

4. Some windows will be replaced for blast resistance with the supports reinforced, and at the Courtoom #2, some windows that will be replaced with ballistic resistance will also be rated for blast resistance and reinforcement added to support the windows.

5. The Judges elevator, currently the freight elevator, will be extended up to the 2nd and 3rd floors. A secure passageway will be extended from the elevator to the east at 2nd and

3rd floors. The 1st floor roof structure will be strengthened to support the passageway.

The chimney structure will be investigated to determine if it is impacted by this work.

6. A mechanical penthouse is being added to the roof of the 1969 building and new floor openings are required.

7. At the jury room south of the new courtroom, the removal of the remaining 1st floor masonry wall wasdesigned. This involves adding structure to support the loads on the wall and incorporating the loss of the wall into the seismic work.

8. The condition of the attic roof structure was surveyed, particularly the sloped concrete at its ability to support roof tiles.

9. The north exterior stairwell will be reconstructed to allow access to the roof penthouse.

This will include removing existing CMU walls and replaced with fully grouted CMU walls strengthened for seismic and wind loads.

10. A new Clerestory will be added on the roof of north addition above courtrooms.

Clerestory openings have been framed out with new structural steel between the existing beams. Existing concrete will be removed from the steel deck and steel studs added to the existing beams and tube kickers will be added to strengthen the new

Clerestory for blast. Reinforcing bars will be added into the concrete when it is recast.

PART 2 - PART 2 - CRITERIA

2.1 THE FOLLOWING CRITERIA ARE APPLICABLE TO THE PROJECT:

A. 2021 Facilities Standards for the Public Building Service (P-100) B. 2018 International Building Code (IBC 2018) C. ASCE 7, Minimum Design Loads for Buildings and Other Structures.

D. ACI 318, Building Code Requirements for Structural Concrete.

E. AISC 360, Specification for Structural Steel Buildings.

2.2 STRUCTURAL DESIGN CRITERIA

Structural Loading

The following design loads are based on the minimum applicable codes:

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Occupancy or Use Live Loadings

Public Assembly with an occupant load >300

Uniform (psf) Concentrated (pounds)

Roof, accessible 30 300

(1) Live load reduction is not permitted.

Snow Loading Pg = 25 psf, Frost Penetration = 30 inches

Vertical Deflection Criteria

Roof deflection under live or snow load must not exceed 1/240 of span length.

PART 3 - RECOMMENDATIONS

1. Basement Level:

A. Existing steel columns are to be removed and replaced with steel columns approximately 6’- 0” from their original locations to allow wider space for new or future courtrooms. New steel columns will be supported on new concrete pile caps and micro piles to be installed within existing basement. Micro pile size and quantity to be determined by soil information in forthcoming geotechnical report.

B. New concrete elevator pit and footing are designed to be supported on micro piles.

Elevator shaft to extend from the basement to first floor level.

C. Fully grouted 8” CMU walls are required in some locations in accordance with USMS Publication 64 requirements. A strip of slab on grade 5 feet wide to be removed and replaced with reinforced concrete slabs on grade.

D. New areaway to be created in existing concrete foundation wall to allow contractor access to crawl space below the west building extension for strengthening of the first floor framing to support future grouted concrete block walls. This work will interfere with US Marshalls currently occupied space and require temporary relocation.

E. Existing elevator shaft is being extended from first floor to the third-floor level.

F. (4) new micropiles will be installed below north stair tower walls to support the new CMU wall above concrete walls.

G. Concrete piers are to be thickened at 2 locations blow courtroom corridor to support the tube columns installed above.

2. First Floor Level:

H. Fully grouted 8” CMU walls to be added at prisoner detention areas. Add new structural steel beams required to reinforce concrete floor below for support of future walls. Work will interfere with currently occupied US Marshalls occupied space. Schedule of work yet to

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I. Some existing joists around Mechanical openings to be removed and replaced with steel framing around the opening.

J. Existing North wall partially to be demolished and rebuilt with 8” concrete wall. Windows will be spaced to avoid interfering with the existing steel columns’ locations that support the roof girder framing. Windows are designed for blast to include steel columns for frame and interior mullions. Existing roof structure will be shored prior to removal of the walls.

K. New elevator shaft to extend from first floor to second floor level. Existing concrete joists will be shored to allow demolition for the new opening. Structural steel will be used to frame out the opening. Existing concrete will be removed to allow connection of new steel framing to the existing concrete encased steel girders. First floor concrete joists will either be reinforced using form and pump concrete if no elevator pit or removed for installing a concrete slab elevator pit below the 1st floor. Pit slab will be hung from new first floor structural steel framing

L. Existing opening in masonry walls to be filled in solid with fully grouted CMU block. Wire reinforcement to be added in the existing brick mortar joints on both sides and extended through concrete block mortar joints to the other side.

M. New opening in brick masonry wall with steel lintel above.

N. Existing north stair tower masonry to be demolished and rebuilt with 12” thick concrete walls to meet code requirements and supported on the existing foundation reinforced with new micropiles.

O. New floor penetrations will be added to accommodate space for new Mechanical duct work. This will include removing some existing joists and adding new steel framing around openings.

3. Second Floor/Roof Level:

P. New mechanical penthouse floor to be designed for 125 pounds per square foot (PSF) Live Load based on anticipated equipment requirements (as opposed to 150 psf), so that no retrofit of the existing roof framing is required.