Tab 02 Design Narrative_Volume 1 2022 06 29.pdf

JOSEPH F. WEIS JR.

U.S. COURTHOUSE BACKFILL PROJECT

VOLUME 1: DESIGN NARRATIVE

75% SUBMISSION

JUNE 29, 2022

Joseph F. Weis Jr. U.S. Courthouse 75% CD Submission Design Narrative June 29, 2022

VOLUME 1 DESIGN NARRATIVE

EXECUTIVE SUMMARY

01 Introduction and Project Background 02 Project Goals and Objectives 03 Accessibility

ARCHITECTURAL AND INTERIOR DESIGN

01 First Floor

a. U.S. Marshals

b. Circuit Library

c. Bankruptcy Clerk's Office 02 Second Floor

a. U.S. Attorney's Office 03 Fifth Floor

a. U.S. District Court 04 Tenth Floor

a. U.S. Bankruptcy Court

HISTORIC PRESERVATION

01 History and Goals 02 Methods 03 Scope of Work

STRUCTURAL

01 General 02 Building Foundation 03 Structural Framing Systems 04 Building Materials 05 Structural Basis of Design 06 Applicable Standards 07 Load Assumptions 08 Serviceability Criteria 09 Load Cases and Combinations

MECHANICAL

01 Summary of Design Areas 02 Courtroom Requirement 03 Design Assumptions 04 Existing HVAC Infrastructure Description 05 First Floor 06 Second Floor 07 Fifth Floor 08 Tenth Floor

Table of Contents

ELECTRICAL

01 Summary of Design Areas 02 LEED Electrical Design Objectives 03 Building Codes, Standards and References 04 Existing Electrical Infrastructure Description 05 First Floor 06 U.S. Marshals 07 Circuit Library 08 Bankruptcy Clerk spaces 09 Second Floor 10 U.S. Attorney's Office 11 Fifth Floor 12 Court Set 13 Judicial Chambers 14 Clerk and Support Spaces 15 Mechanical System Upgrade 16 Tenth Floor 17 Court Set 18 Judicial Chambers 19 Clerk and Support Spaces 20 Mechanical System Upgrade

PLUMBING

01 Reference Standards 02 General Plumbing Demolition 03 Track Level Plumbing Demolition 04 Level 01 Plumbing Demolition 05 Level 02 Plumbing Demolition 06 Level 04 Plumbing Demolition 07 Level 05 Plumbing Demolition 08 Level 09 Plumbing Demolition 09 Level 10 Plumbing Demolition 10 General New Plumbing Work

LIFE SAFETY & FIRE PROTECTION

01 Goals and Objectives 02 References - Applicable Codes and Standards 03 General Design Requirements 04 Means of Egress 05 Interior Finishes 06 Fire Alarm and Emergency Communication Systems 07 Water Supply for Fire Protection 08 Automatic Sprinkler and Standpipe Systems 09 Non-Water Based Fire Extinguishers and Cabinets 10 Elevator Systems 11 Special Fire Protection Requirements 12 Historic Structures 13 Mass Notifications Systems 14 Commissioning Fire Protection and Life Safety Systems 15 Design Reviews

IT & SECURITY

01 Technical Security 02 Telecommunications

ACOUSTICS

01 Acoustical Criteria Summary 02 Preliminary Recommendations and Guidelines

PHASING

VOLUME 2 APPENDIX

01 Updated Programs 02 Courtroom Mockup Drawings U.S. Bankruptcy Court U.S. District Court 03 Existing Bankruptcy Furniture Coordination Plans 04 Existing USBC Furniture Inventory (US Steel Building) 05 Calculations + Cutsheets

Project Team U.S. General Services Administration

MID-ATLANTIC REGION 3

100 S Independence Mall West Philadelphia, PA,19106

Government Agency Joseph F. Weis Jr. U.S. Courthouse 700 Grant Street Pittsburgh, PA 15219

Design Team

DLR Group Architecture, Interiors, Historic Preservation Change Management, MEP, Acoustics, IT & Technical Security Engineering

Thornton Tomasetti Structural Engineering

Jensen Hughes Life Safety + Fire Protection

Forella Group, LLC Cost Estimating

INTERTEK

Environmental Consultant

DLR Group was retained by GSA to provide architectural, interior design, and engineering services to design and provide construction administration services for the Joseph F Weis Jr. Courthouse Backfill project in Pittsburgh, Pennsylvania. Key AEI services include:

• Existing conditions survey, including laser scanning

• Program Validation from the 2016 and 2017 studies

• Design + Construction Administration Services

• Change Management Services

01. Introduction and Project Background

The Joseph F. Weis Jr. Courthouse is located in the central business district of Pittsburgh, Pennsylvania.

The neo-classic structure was built in 1934 and consists of approximately 825,000 gross square feet. The 14-story building is comprised of 10 floors, plus 3 basement levels, 5 mechanical mezzanine levels and 2 penthouse areas that also house mechanical equipment. The building includes 18 courtrooms, 5 of which retain significant historic finishes, including mahogany paneling, murals, and marble work. The original murals which date back to the 1930s, as well as additional murals commissioned as part of the recent major renovation in 2004, depict the industrial life of Pittsburgh. There are three levels of parking – two inside garage levels and one surface parking area provided at the rear of the building.

The Weis Courthouse has undergone several renovations since its erection, including in the 1960’s and 1970’s when most of the building’s original interior finishes in the postal space were removed or covered. In 2002 to 2006, the existing courtrooms were modernized, and six new additional courtrooms and chambers were inserted in the court yards. The building is a contributing building in the Pittsburgh Central Downtown Historic District and is listed in the National Register of Historic Places.

The United States Bankruptcy Court (USBC) will be relocating from an adjacent lease space at the U.S. Steel Building to space within the Weis Courthouse, primarily the first and tenth floors. The fifth floor was initially selected for the Bankruptcy Court, however, the deployment strategy changed from the 2016 Vacant Space Backfill Housing Study by consolidating the Bankruptcy court sets and judicial chambers to the 10th floor, enhancing the efficiency in Bankruptcy’s operation. The existing District Courtroom and judicial chambers on the tenth floor will be relocated to the new District Courtroom, chambers, and support space on the fifth floor.

The renovation and backfill areas include:

First Floor:

US Marshals, Task Force Circuit Library USBC Clerks Office

Second Floor:

U.S. Attorney’s Office

Fifth Floor:

US District Court including one (1) court set; two (2) judicial chambers; and clerk and support spaces

Tenth Floor:

US Bankruptcy Court including two (2) court sets, one of which is existing and will have minor refresh work including painting and carpet replacement as an option; three (3) judicial chambers, two of which is existing and will have minor refresh work including painting and carpet replacement as an option; and clerk and support space

Executive Summary

02. Project Goals and Objectives

The project will accommodate a wide range of Government objectives, including the opportunity to improve the utilization of space and relocate federal agencies from lease space into a federally owned building. The government will achieve savings due to lease cost avoidance, improved space utilization, and consolidating similar functions in the Weis Courthouse building.

• Consolidate off-site leased space into the Weis Courthouse Federal building, right-sizing agency footprints and reducing rental costs.

• Produce an overall design that meets the needs of the federal agencies housed.

• Renovate agency spaces as flexible, collaborative workplaces

• Meet space utilization rate goals for offices

• Produce a project that reflects the goals and objectives of the Design Excellence Program, delivering an innovative project worthy of peer recognition and awards, providing a holistic integrated design, providing best value to the Government and the American taxpayer.

• Improve aging existing infrastructure

• Respond to the economic climate of shrinking federal budgets. Maximize budgets through the integration of sustainability, facility management, and value engineering techniques

• Maintain existing building operations at the Weis Courthouse, minimizing impact to current tenants

• As appropriate, incorporate modern office space design principals that correspond to a more mobile, flexible and tech savvy workforce

• Achieve design performance requirements as described in the Scope of Work

• Successfully complete the project on time and within budget.

03. Accessibility

The Architectural Barriers Act Accessibility Standard (ABAAS) mandates compliance for accessibility in federal buildings without the use of special facilities for persons with disabilities. Listed in the National Register of Historic Places, the existing Weis Federal Courthouse was build in 1934 prior to the enactment of ABAAS, 1968. However, alterations and additions must comply with ABAAS. The Weis Federal Courthouse Backfill project will strive to meet the ABAAS guidelines / standards and in some instances, when necessary provide adaptable design responses.

Architectural and Interior Design

01. First Floor

a. U.S. Marshals

The U.S. Marshals currently occupy a section of the first floor in the Joseph Weis Jr. Federal Courthouse. The current space is a typical office space with lay-in ceilings and carpet. Based on the validated and approved program, the U.S. Marshals space will be reduced and updated per the current Marshals’ needs. The new entrance to the suite is off the secondary east-west corridor. As you enter the suite, the conferencing, support, and storage areas are immediately off the entrance and easily accessible without going into the private work area. The main work area, consisting of open workstations, is centralized and located closest to the existing windows optimizing access to daylight and views for the staff. The private office and main conference room will have glass fronts. The Marshals’ bulk storage duals as a second exit out from their suite onto the north-south public corridor.

Interior design concepts for the workspace area will be open, linear, and streamlined. The break room area will have some accents, natural, and bright materials. The concepts will be flexible with durable materials.

Materials will be selected appropriate to the function of the space, sustainability, and acoustics qualities.

Specifically, the proposed key materials are:

• Private Offices + open workstations: Carpet Tile

• Conferencing

• Corridors + Breakroom: Wood look Luxury Vinyl Tile

• Ceiling: 2x2 Acoustical Tile + Drywall

• Storage/Support Spaces: VCT

b. Circuit Library

The Circuit Library is currently on the southern portion of the fifth floor. The Circuit Library will be relocated to a renovated space east of the proposed U.S. Marshals suite on the first floor. The entrance to the library will be off the main north-south corridor. The reception, library director’s office, training room and breakroom will be directly off to the north as one enters the suite. As part of the welcoming entry experience, a wood portal will be created to define the reception area. Moreover, the existing artwork in the current library will be relocated and displayed at the entrance/reception area. Existing mechanical rooms are along the western portion of the exterior wall, blocking off access to exterior windows and daylighting. Fortunately, the bottom of the existing structure above, in most areas, is 13’-4” AFF which can afford to have a more generous ceiling height. This will create a taller volume in the space. The sitting area off the reception will have floating decorative acoustical ceilings with pendant light fixtures, creating a more intimate zone. The existing library stacks will be reused and relocated to the first floor. The orientation of the library stacks run north-south and are placed around the existing column locations.

Interior design concepts for the Circuit Library will provide an open, bright and warm environment, creating a variety of spaces for collaboration and quiet areas. Materials will be selected appropriate to the function of the space, sustainability, and acoustics qualities.

Specifically, the proposed key materials are:

• Private Offices: Carpet Tile

• Conferencing: Carpet Tile

• Open Stack Area: Carpet Tile

• Reference Desk + Breakroom: Wood look Luxury Vinyl Tile

• Ceiling: 2x2 Acoustical Ceiling + Drywall

• Storage/Support Spaces: VCT

c. Bankruptcy Clerk's Office

The Bankruptcy Clerks are currently in the U.S. Steel Tower. They will be relocated to the first floor, to the vacant area between the new Circuit Library and the existing Social Security Administration suite to the south.

This area housed the original U.S. Post Office in the Weis Courthouse There are a few challenges in this space:

• Existing column spacing

• Existing electrical and communication rooms

• Existing infilled windows

To address the first challenge, the large conference/training room is centrally located to minimize column interruption.

The second challenge of responding to the existing electrical and communications rooms allowed for the design of two separate entrances, one for the Clerk’s office and the other for the public entrance.

The final challenge required removing the window infill and restoring the exterior windows to its original condition. This allows daylight to enter the space. The open workstations are placed closest to the win-dows, accessing daylight and views from the adjacent windows. In general, private offices will have glass fronts and as much as feasible, clerestories will be incorporated to allow daylight to filter into enclosed spaces.

There are three existing elevator shafts within the proposed clerk’s suite. Included as an Option, the existing secure passenger elevator will be modified to receive a stop on the first floor to provide access from the tenth floor (USBC) to the USBC Clerk's suite.

The open work area is proposed to have carpet tile while the circulation paths are proposed to have resilient flooring. The ceiling design will echo a similar configuration. Over the workstations, acoustical drop ceilings are proposed and over the circulation paths, an open to structure ceiling approach is proposed.

Interior design concepts for the the Bankruptcy Clerk's suite will provide an open, linear, and streamlined environment, creating a variety of spaces for collaboration, focused work, and training. Access to natural light from the existing windows will be provided. Materials will be selected appropriate to the function of the space, sustainability, and acoustical qualities.

Specifically, the proposed key materials are:

• Private Offices + open workstations: Carpet Tile

• Conferencing / Training: Carpet Tile

• Corridors + Breakroom: Wood look Luxury Vinyl Tile

• Storage / Support Spaces: Wood look Luxury Vinyl Tile + VCT

• Toilet: Porcelain Tile

• Ceiling: 2 x 2 Acoustical Ceiling Tile + Drywall

02. Second Floor

a. U.S. Attorney's Office

The current vacant office space on the southwestern corner of the second floor will be backfilled with the U.S.

Attorney's Office.

Based on the layout provided by others, the office suite will include eight (8) private offices, support spaces, including breakroom, and single use toilet. Design will follow the Design Guide 2019, Executive Office for United States Attorneys.

Interior design concepts for the workspace area will be open, linear, and streamlined. The break room area will have some accents, natural, and bright materials. The concepts will be flexible with durable materials.

Materials will be selected appropriate to the function of the space, sustainability, and acoustics qualities.

Specifically, the proposed key materials are:

• Private Offices: Carpet Tile

• Corridors: Carpet Tile

• Breakroom: Wood look Luxury Vinyl Tile

• Ceiling: 2x2 Acoustical Tile

• Storage/Support Spaces: VCT

03. Fifth Floor

a. U.S. District Court

The Circuit Library currently occupies the southern part of the fifth floor in the Joseph Weis U.S. Courthouse.

Due to the reduction of their needs and to provide easier access, the library will be relocated to the first floor. The vacated area by the library on the fifth floor that is surrounded by a light well will house two new judicial chambers and a courtroom for the U.S. District Court. Initially selected for the Bankruptcy Court, the deployment strategy changed from the 2017 study by consolidating the Bankruptcy court sets and judicial chambers to the 10th floor by enhancing the efficiency in Bankruptcy’s operation.

The south part of the fifth floor will include two judicial suites for the District Court. Each suite will be planned as separate units without a flow through circulation pattern. A separate restricted corridor connecting the reception area off the public corridor to the entry into the court set on the eastern side will provide entry points to the two judicial suites. Each suite will include a judge’s office, three (3) law clerks and one (1) courtroom deputy clerk; all in compliance with the U.S. Courts Design Guide. Ancillary support functions such as copy, file, storage and service units will also be housed in each suite. Finally, both judicial areas will include a conference/reference room.

The challenge of planning a new District Courtroom was three-fold.

• First, the column spacing was not condusive for a district courtroom that typically has a clear width of 40 feet. Column spans ranged from 28’ to 17’.

• Second, the courtroom requires the ability for the U.S. Marshals Service to escort in-custody defendants in a secure manner to the courtroom.

• Third, the floor-to-floor height on the fifth level is 12’-0”.

To address the first challenge, the Design Team strategically used each column bay as a separate element for the courtroom. One column bay was used for the litigation well, a second for the judge’s bench, the third for the jury box, and the last bay for the public gallery. By using these column bays in a manner that ensure sight lines were not obstructed and sufficient spacing of all the participants, a new 18-jury member courtroom was developed with a seating capacity of approximately 45. Though under the standard 2,400 SF size required by the U.S. Courts Design Guide, the courtroom layout was reviewed by GSA, the Circuit Architect and District Court judges and approved considering the restraints of the space. The second challenge of moving in-custody defendants was achieved by connecting two existing holding cells developed during the 2005 renovation by providing an opening between this area and the corridor behind the new courtroom. A secure pedestrian sallyport was created that allows the Marshals to escort defendants without co-mingling with the judges and/or clerks.

The final challenge required the need to create coffers between the existing structure to provide as much height and volume to the space as possible. Since the average ceiling height is under 9 feet, the judge’s bench is only raised two steps (12”) and the witness stand is raised one step (6”). Hydraulic lifts will be provided to ensure accessibility to these locations in compliance with ADA.

Entry into the new courtroom will occur by creating a courtroom waiting area that opens to the light well bringing in natural daylight to the waiting area and the main north-south corridor. This design also allows for two attorney/client conference rooms to be placed off the waiting area. Finally, a sound lock is placed that allows the public to enter the courtroom in the center of the space.

Interior design concepts for the U.S. District Courts will provide a formal, refined, stately, and professional environment. Materials will be selected appropriate to the function of the space, sustainability, and acoustics qualities.

Specifically, the proposed key materials are:

Courtroom:

- Carpet Tile with Wood look Luxury Vinyl Tile accents

- Wood Stained Millwork

- Quartz Wall Accent

- Ceiling: 2x2 Acoustical Ceiling + Drywall Chambers + Support Spaces

- Chambers: Wood look Luxury Vinyl Tile

- Private Offices: Carpet Tile

- Conferencing: Carpet Tile

- Toilets: Porcelain Tile

- Ceiling: 2x2 Acoustical Ceiling + Drywall

- Storage/Support Spaces: Wood look Luxury Vinyl Tile

04. Tenth Floor

a. U.S. Bankruptcy Court

As previously mentioned, the tenth floor will house the U.S. Bankruptcy court sets and judicial chambers.

Three judicial chambers and two courtrooms will be provided to the courts based on the 2017 study and validated by the program. The tenth floor currently includes two existing chambers on the south side and one courtroom in the middle used by the District Court. It is anticipated that minor renovation work will be included in these areas, specifically, in the middle existing courtroom the jury box will be removed and the existing space will be converted into a conference / reference room for the second judge. Additionally, options will be included to repaint, painted surfaces and replace carpet with new carpet in these two areas.

The new courtroom and judicial chambers will occur on the north side that is currently shell space. The courtroom is approximately 1,800 SF in compliance with the U.S. Courts Design Guide. An option for a hydraulic lift to the judge's bench is included. The judge’s office, three law clerks and conference/reference room will occur in the neck area between the new and existingcourtrooms. An existing mechanical room with an air-handling unit in this zone will be relocated to the east side of the new courtroom. This expanded mechanical room will serve the new courtroom and judicial suite. Restricted circulation between the three judicial chambers and two courtrooms will occur by developing a pass through in the sound lock to the middle courtroom. The new conference room and the two (2) new law clerk offices along the restricted north south corridor will have a vision panel doors to allow borrowed light from the exterior windows enter the restricted north south corridor. Vision panels and controlled access doors to the restricted corridor will allow judges and clerks to navigate between both ends of the floor. The new courtroom also affords the opportunity to have existing windows accessing daylight and views the north side of the courtroom. Additionally, the south side of the courtroom will mirror the north side existing windows with clerestories, similar in width and rhythm. These clerestories will provide some borrowed daylight from the existing windows on the southern most exterior wall facing the elevator tower.

The nine courtroom deputy clerks and three court reporters will be housed on the western side of the public corridor which is currently shell space; including two sets of three courtroom deputy clerk offices on the southern side to serve the two judicial chambers across the corridor, and a set of courtroom deputy clerk offices on the north side of the new courtroom alcove to serve the third judge.

A vacant space splits the two groupings of the deputy clerks and court reporters. An option will be included to convert the vacant space into an extension of the corridor, creating a courtroom alcove for the attorneys and public to wait outside the courtroom. This alcove, opposite to the middle courtroom, would allow natu-ral daylight to spill into the public area.

Interior design concepts for the U.S. Bankruptcy Courts will provide a formal, bright, stately, and profes-sional environment. Materials will be selected appropriate to the function of the space, sustainability, and acoustics qualities.

Specifically, the proposed key materials are:

Courtroom:

• Carpet Tile with Wood look Luxury Vinyl Tile accents

• Wood Stained Millwork

• Quartz Wall Accent

• Ceiling: 2x2 Acoustical Ceiling + Drywall

Chambers + Support Spaces

• Chambers: Wood look Luxury Vinyl Tile

• Private Offices: Carpet Tile

• Conferencing: Carpet Tile

• Toilets: Porcelain Tile

• Ceiling: 2x2 Acoustical Ceiling + Drywall

01. History and Goals Completed in 1934, the Joseph F. Weis, Jr. U.S. Courthouse is a Beaux Arts-style building in Pittsburgh, Pennsylvania that was originally known as the Pittsburgh US Post Office and Courthouse. The building is a contributing building in the Pittsburgh Central Downtown Historic District and was individually listed on National Register of Historic Places in 1995.

Designed in a clean classical style popular with government buildings in the 1920s and 1930s, the building presents a symmetrical front façade along Grant Street with a four-story base visually anchoring a central edifice that continues to the eleventh story. The façade is a formally organized with grand arched windows and entries along the building’s base before switching to a more vertical delineation of windows and pilasters that accentuate the monumentality of the central portion of the structure as well as defining the two separate primary entrances that serve the building.

The Weis Courthouse stands today much as it did in 1932, while time has added to its patina, the structure is in excellent condition with changes completed over the years having done little to reduce it sense of grandeur or architectural integrity. From a preservationist perspective, the goal of this work is to provide tenants and visitors with an accessible, safe, and secure work environment while safeguarding the architectural and historic character that the people of Pittsburgh celebrate.

02. Methods

To inform preservation and design decisions, a review of existing building documentation in conjunction with on site observations, photography, code review, and 3D terrestrial LiDAR scanning (laser scanning) was undertaken. The laser scanning was used to capture ultra-high accuracy measurements of the specific areas to be impacted by this scope of work.

Examination of historic treatments zones was referenced with the use of the 2009 Weis Courthouse GSA Building Preservation Plan (see Image #2). This building research and documentation provided the information needed to focus on the specific historic areas impacted by modernization efforts within the Weis Courthouse.

Historic Preservation Building name:

Building address:

Project title:

Project number:

Region:

Author:

IMAGE 1 - ARCHITECT'S RENDERING OF THE BUILDING. PITTSBURGH PRESS,

SEPTEMBER 13TH, 1931

IMAGE 2 - BUILDING PRESERVATION ZONES AS ILLUS-

TRATED BY THE GSA 2009 WEIS COURTHOUSE BUILDING

PRESERVATION PLAN

Joseph F. Weis Jr. U.S. Courthouse 550 Grant St, Pittsburgh, PA 15209 U.S. Bankruptcy Court Consolidation (Backfill) Joseph F. Weis Jr. U.S. Courthouse

TBD

Mid-Atlantic Region, Region 3 Matthew Jennings, AIA

03. Scope of Work

The scope of this project is limited, with the majority of new work falling into the category of Zone 3 – Renovation Zone. Renovation zones within the Weis Courthouse make up the areas that have undergone significant alteration since their original construction and provide the most flexibility for new work without having an adverse impact on historic materials. In practice, most of these spaces are non-historic tenant spaces being renovated for new tenants or program and have no historic materials beyond those that come into play as part of the exterior envelope, specifically windows.

Where new ceilings or HVAC are put in place along the perimeter of the building, they will be kept above the windows and not be visible from the exterior of the building. Similarly, new HVAC equipment will utilize existing building louvers for air intake and exhaust with any additional units being place on the roof adjacent to existing mechanical equipment.

The remaining project program items with preservations concerns are limited to areas that fall outside of the Zone 3 and within Zone 1 - Restoration and Zone 2 – Rehabilitation:

Tenant Corridor Entries Modifications to tenant entries will take place on multiple floors at multiple locations. Generally, the approach to modifying or providing new doors into the historic Zone 1 corridors will be determined by the approach previously taken at adjacent doors where appropriate (see Image # 3 & 4). While the design for tenant entrances requires further development, the general approach will focus on minimizing any damage to historic terrazzo flooring, marble wainscotting, or marble trim. Historic materials that require removal for the insertion of a new door will be salvaged for reuse on site.

The approach for existing historic doors will be to keep them in place even when new programmatic needs do not require them to be functional. Depending on client needs the doors will be simply locked in place or covered with a noninvasive drywall partition on the interior side of the suite that can be removed to reactivate the door at a later time if needed.

IMAGE 3 - SCREEN CAPTURE OF LASER SCANNING IMAGE FROM THE

WEIS COURTHOUSE FIRST FLOOR CORRIDOR

IMAGE 4 - SCREEN CAPTURE OF LASER SCANNING IMAGE FROM THE

WEIS COURTHOUSE TENTH FLOOR CORRIDOR

IMAGE 5 - PLAN SHOWING CONFIGURATION OF TENTH FLOOR CENTER

ALCOVE - OPTION

IMAGE 6 - PLAN SHOWING CONFIGURATION OF TENTH FLOOR

NORTH ALCOVE

IMAGE 7 - EXISTING FIRST FLOOR WINDOW CONFIGURATION ADJA-

CENT TO CURRENTLY CLOSED-OFF WINDOWS. WINDOWS SHOWN

WERE PREVIOUSLY RESTORED IN A 2019 SSA SUITE RENOVATION

Corridor Waiting Areas Utilizing vacant tenant space to provide an alcove of the historic tenth floor corridor to relieve corridor congestion and provide natural lighting across from the courtroom entrance area (see Image # 5). The design calls for the white terrazzo floor to continue into the new public space. The profile of the wall wainscotting would also continue into the room but with the use of wood instead of the historic marble to indicate the transition between the historic corridor and the contemporary alcove.

A similar corridor waiting alcove will also be added at the north end of the corridor with a similar treatment (see Image #6). Ceilings for both alcoves would be a higher level of finish then the corridor’s current 2x2

ACT.

Restoration Of Windows At six locations on the southeast side of the first floor, sections of windows were previously filled in with drywall and stud framing from the interior side of the wall. These locations will have the framing removed to return the windows to functionality (see Image #7).

The condition of the windows will be observed once exposed to determine the level of repair or restoration needed to return them to functionality.

The Joseph F. Weis Jr. Courthouse was built in 1934 and is located at 700 Grant Street, Pittsburgh, PA. It is a 14-story neo-classic style building with approximately 825,000 square feet and located in downtown Pittsburgh, PA. The building has undergone multiple renovations since it was built, most notably the 1960s, 1970s, and between 2002 and 2006.

01. General

a. Modifications To The Existing Structure

The Joseph F. Weis Jr. Courthouse renovation project consists of the renovation of approximately 43,260 SF of the Weis Courthouse Building to relocate the U.S. Bankruptcy Court into the building. The project includes MEP upgrades to accommodate these spaces, as well as the evaluation/upgrade of existing floor systems to accommodate new floor loads for relocating the library stacks to Level 1.

The proposed building renovation of the Weis Courthouse will involve modifications of structure as necessary to accommodate the work of other disciplines. We expect this will include:

• The level 1 concrete floor slab in the vicinity of the new library will be tested to confirm concrete properties to confirm the capacity of the structural bays. Prior to confirmation of analysis, the concrete shall be cored to determine concrete thickness, concrete compressive strength, and concrete density. A minimum of 3 cores shall be tested by the contractor. The concrete floors may need to be strengthened based on capacity determined through testing.

• Concrete reinforcement in the slab shall be tested to determine yield strength of the bars. Depending on the results of testing, possible non-destructive testing using GPR may be used to confirm spacing of slab reinforcement.

• Analysis of existing steel framing and connections to determine structural capacities for new library load.

• Areas within the new library where infills and steel framing were added to close original openings shall be investigated to provide steel framing sizes, connections, and slab on metal deck properties.

• Chipping of concrete encasement around selected beams to determine connections not shown in original building documents.

• New floor openings for mechanical, electrical, and plumbing penetrations

• Review of new MEP equipment weights on floor framing

Existing capacities of the structural framing will be determined after investigations and minor demolition are completed to determine the steel’s tensile strength and concrete’s compressive strength. Also, the existing connections will be exposed and measured by a contractor to compare to structural connection tables in design guides published around the time of the building design. At the time of the 75% Construction Documents Submission, the investigative work has not been completed, and therefore structural review has not begun.

02. Building Foundations

Foundations The foundations for this building are comprised of steel column supported from concrete piers sitting on approximately 3 ft deep isolated spread footings. The slab on grade is a 12” thick slabs. Foundation walls around the building vary in thickness from 4’-6” to almost 6’-0” thick. Foundations supporting the track level framing include 18” OD steel encased concrete.

Structural

03. Structural Framing System

a. Below Grade Framing System

Basement The structural framing system for the basement below grade is steel wide flange beams, with depths ranging from 14” to 36” deep. The steel framing is encased in concrete to act as fireproofing of the steel. The floor deck is comprised of a 10” thick concrete slab supporting concrete fill and wood block flooring.

Track Level This structural framing system is comprised of 27” deep beams with up to 36” deep girders. The floor is a 4-1/2” deep concrete slab supporting 3-1/2” of fill and 1” of finish. The original building was designed to support the Pennsylvania Railroad trains at the track level below grade. This has since been infilled and converted into a parking garage.

b. Above Grade Framing System

Level 1 The structural column bay above-grade varies, but is typically 20 feet by 15 to 25 feet. The floor construction is as shown below. Steel transfer girders at level 1 support column transfers above, spanning over the original railroad tracks at the track level below.

Typical Floors The typical floor beam framing depths range from 12” deep to 16” deep. The girder depths are typically 21” deep. Refer to the image shown at level 1 above for typical floor construction.

Roof The roof structure consists of 12” to 16” deep steel beams and 21” to 30” deep steel girders. The floor is comprised of 4” thick concrete supporting fill, roofing, and waterproofing.

c. Columns All columns are steel wide flange sections. Column sizes vary across the structure, with typical column dimensions of 12” to 14”. The column sizes at the first floor range from 14c86 to 14c385.

d. Miscellaneous

Fire Resistance Statement The current design assumption is that horizontal structural framing is to be 2-hour rated. Columns for the entire project are to be 3-hour rated.

c. Concrete

Concrete shall be as follows:

• Framed Concrete Slabs/Beams

• Concrete Slabs on Metal Deck

• Housekeeping Pads, Fill, Curbs

• Non-shrink grout

• Built-up Slabs

Reinforcing Steel

• Deformed Bars

• Weldable Deformed Bars

• Epoxy Coated Deformed Bars

• Welded Wire Reinforcement

• Epoxy Coared Welded Wire Reinf.

5,000 psi 4,000 psi 4,000 psi Lightweight 8,000 psi 4,000 psi Lightweight

ASTM A615 Grade 60 and 75

ASTM A706

ASTM A615/A775

ASTM A1064

ASTM A1064/A884

Notes:

1. All concrete is normal weight concrete with a density of 145 pcf UON

2. “Green Concrete” including but not limited to technologies such as CarbonCure and other systems that do not negatively affect the workability or structural performance of the concrete can be evaluated by the SER to confirm acceptability. Alternate pricing for these technologies should be provided within the Schematic Design estimate.

Concrete exposed to freezing weather shall contain an air entraining agent.

b. Connection Material

• Angles and channels

• WTs

• Plates

• Bolts

• Nuts

• Washers

• Anchor Bolts

• Headed studs

• Weld Electrodes

ASTM A36

ASTM A992

ASTM A36, 36 ksi min. yield strength or ASTM A572 or A529, 50 ksi min. yield strength ASTM A325 or A490

ASTM A563

ASTM F436

F1554 Grade 55 with weldability supplement S1 ASTM A108, Grade 1010 through 1020 headed stud type, cold-finished carbon steel, AWS D1.1, Type B: ¾” diameter

E70XX

ASTM 572 or A992, 50 ksi min. yield strength ASTM A36, 36 ksi min. yield strength

ASTM A36

ASTM A500 Grade C, 46 ksi min. yield strength for round and 50 ksi min. yield strength for rectangular HSS ASTM A53 Grade B, Type S, 35 ksi min. yield strength ASTM A572 or A529, 50 ksi min. yield strength

• Rolled Shapes and Channels

• Angles for Trusses and Braces

• Miscellaneous Angles

• Hollow Structural Sections

• Seamless Pipe

• Plates

04. Building Materials

a. Structural Steel

Pricing Information As is customary during this stage of the project, appropriate contingencies must be used in the pricing of the information provided in this narrative and on the drawings.

05. Structural Basis of Design

a. Applicable Code

Building Code

• Building Code 2015 of Pennsylvania referencing International Building Code 2015

• PBS P100 US GSA Facilities Standards for the Public Buildings Service

06. Applicable Standards

a. Structural Design Loads

• American Society of Civil Engineers (ASCE 7-10) "Minimum Design Loads for Building and Other Structures"

b. Structural Steel

• American Institute of Steel Construction, ANSI/AISC 360-10 “Specification for Structural Steel Buildings”

• American Institute of Steel Construction, “Steel Construction Manual, 14th Edition”

• American Welding Society, AWS D1.1-10 “Structural Welding Code-Steel”

c. Structural Concrete

• American Concrete Institute, ACI 318-14/318R-14 “Building Code Requirements for Structural Concrete” (ACI 318-14) and “Commentary” (ACI 318R-14)

e. Post-Installed Anchors

• Masonry Adhesive Anchors

• Concrete Adhesive Anchors

• Threaded Rod

• Expansion Anchors

• Field Drilled Threaded Screw

Anchors

d. Masonry

• Concrete Masonry Units

• Mortar

• Mortar Usage

• Grout

• Reinforcing

• Joint Reinforcement

• Exterior Joint Reinforcement

• Interior Joint Reinforcement

• Adhesive Anchors

HIT-HY 70 by Hilti, Tulsa, OK HIT-HY 200 by Hilti, Tulsa, OK HAS or HIT-Z by Hilti, Tulsa, OK KWIK Bolt TZ by Hilti, Tulsa, OK HUS-EZ by Hilti, Tulsa, OK

ASTM C90, normal weight (135 pcf) 1900 psi min. 28-day compressive strength for S or M mortar or 2150 psi for Type N mortar ASTM C270, Type S, M or N Portland cement/lime only by proportion Use type S or M mortar when masonry is in direct contact with soil;

use type S mortar for all exterior and interior load-bearing walls; use type N mortar for all exterior and interior non-load-bearing walls ASTM C476 by proportion, 2000 psi min. 28-day compressive strength ASTM A615 Grade 60 ASTM A1064, truss or ladder type Galvanize per ASTM A153 Galvanize per ASTM A641 HIT-HY 70 by Hilti, Tulsa, OK

Concentrated Loads Floors will be designed to support the uniformly distributed live loads prescribed in above, or the concentrated loads prescribed in the governing code applicable for the project, whichever produces the greater stresses.

The concentrated load should be located so as to produce the maximum stress conditions in the structural members. As a guide, following are locations where concentrated loads are likely to occur. See applicable codes for all the locations to be considered for concentrated live load.

Location

• Lobbies/first floor corridor

• Corridors above first floor

• Elevator Machine Room Grating

• Stair Treads

• Roof

• Handrails and Guards

• Grab Bars, Shower Seats, and Dressing Room Bench Seats

• Sidewalks & Vehicular Driveways w/ Truck Access

• Retail Stores

• Loading Dock

• Garage (on area of 4.5"x4.5")

Concentrated Loads 2,000 lb 2,000 lb 300 lb (on area of 2"x2") 300 lb (on area of 2"x2") 300 lb 200 lb 50 plf 250 lb

8,000 lb

1,000 lb 8,000 lb 3,000 lb

Unbalanced Loading:

Unbalanced live loads will be used where such loading will result in members or connections requiring greater capacity than the balanced load condition.

Uniformly Distributed Loads Lobbies, Stairs, & Corridors Offices + Partitions

Libraries Courtrooms Parking Mechanical Rooms (HVAC) Telecommunications/Electrical Closet Elevator Machine Rooms Roofs (Live)

100 psf 80 psf 20 psf 100 psf

150 psf 100 psf 40 psf 150 psf OR ACTUAL EQUIPMENT WEIGHT 250 psf OR ACTUAL EQUIPMENT WEIGHT 250 psf 30 psf

07. Load Assumptions

a. Dead Loads

Dead loads are to be in accordance with IBC 2015 and ASCE 7-10 and are based on the construction materials for the structure

b. Live Loads

Where actual conditions (e.g. equipment loads) produce higher concentrated loads than those tabulated, the structure shall be designed for the higher loads

Impact Loads Elevators: Elevator loads shall be increased by 100 percent for impact** **Check with Vertical Transportation Consultant and actual manufacturer if loads provided by them already include this factor.

Machinery: The weight of machinery and moving loads shall be increased as follows to account for impact:

• Light Machinery (shaft or motor driven) 20 percent

• Reciprocating Machinery 50 percent

Hangers: Live loads on hangers supporting floors or balconies shall be increased 33% for impact.

c. Wind Loads

Wind loads are not being studied in the scope of this project.

d. Snow Loads

Snow loads are not being studied in the scope of this project.

e. Seismic Loads

Seismic loads are not being studied in the scope of this project.

f. Earth Loads

Earth loads are not being studied in the scope of this project.

08. Serviceability Criteria

a. Deflection

Floor Structures

• Live load deflection should not exceed 1/360 of span length.

• Live load deflection at exterior spandrels should not exceed 1/360 of the span length or 1/2”, whichever is less.

• Long-term total load (DL + superimposed DL + LL + additional long-term deflection resulting from creep and shrinkage) deflection of concrete beams and girders should not exceed 1/240 of span length.

• Long-term total load (DL + superimposed DL + LL + additional long-term deflection resulting from creep and shrinkage) deflection at exterior spandrels should not exceed 1/240 of the span length or 1/2”, whichever is less

• Differential deflection between floors under maximum live load + superimposed dead load + additional long term deflection resulting from creep and shrinkage for concrete spandrel beams/girders supporting curtain wall should not exceed 1/2”.

• Long-term total load column shortening should not exceed 1/8” per story

b. Vibrations

Where human comfort is the criterion for limiting motion, as in the case of perceptible vibration, floor framing should be designed to limit this effect. See AISC Design Guide 11 Guidelines.

09. Load Cases and Combinations

Notation:

D = Dead Load [Light Dead Load generally excludes partitions and part of superimposed Dead Load.

L = Live Load Lr = Roof Live Load S = Snow Load E = Earthquake Load H = Earth Pressure Load W = Wind Load R = Load due to initial rainwater or ice exclusive of ponding

Load and Resistance Factor Design (LRFD) per ASCE AISC 360 and ACI 318 require that the required strength of the structural frame and its elements be determined from combinations of factored loads. The most critical effect may occur when one or more of the loads are not acting. The load combinations to be investigated are:

1. U = 1.4(D+F)

2. U = 1.2(D+F+T) + 1.6(L+H) + 0.5(Lr or S or R)

3. U = 1.2D + 1.6(Lr or S or R) + (1.0L* or 0.5W)

4. U = 1.2D + 1.0W + 1.0L* + 0.5(Lr or S or R)

5. U = 1.2D + 1.0E + 1.0L* + 0.2S

6. U = 0.9D + 1.0W + 1.6H

7. U = 0.9D + 1.0E + 1.6H

8. U = 1.2D + 1.6L + 1.6H except if D or L reduce the effect of H then use

9. U = 0.9D + 1.6H

* The load factor on L in combinations 3, 4, and 5 is permitted to equal 0.5 for all occupancies in which L is less than or equal to 100psf, with the exception of garages or areas occupied as places of public assembly.

Allowable Stress Design (ASD) per ASCE For structural elements, such as foundations and masonry, designed by Allowable Stress Design, the most critical effect in each element shall be determined from the following load combinations:

1. S = D

2. S = D + L

3. S = D + (Lr or S or R)

4. S = D + 0.75L + 0.75(Lr or S or R)

5. S = D + (0.6W or 0.7E) 6a. S = D + 0.75L + 0.75(0.6W) + 0.75(Lr or S or R) 6b. S = D + 0.75L + 0.75(0.7E) + 0.75(Lr or S or R)

7. S = 0.6D + 0.6W

8. S = 0.6D + 0.7E

9. S = D + L + 1H except if D or L reduce the effect of H then use

10. S = 0.6D + 1.0H

The following narrative describes HVAC work for the Weis U.S. Bankruptcy Court Backfill project. The existing facility renovation project includes first, second, fifth and tenth floor renovations / backfill for the U.S.

Bankruptcy Court, U.S. District Court, U.S. Bankruptcy Clerk, Circuit Library, U.S. Marshal Task Force, and U.S.

Attorney’s Office.

01. Summary of Design Areas

• First floor renovation for U.S. Marshal, Circuit Library and Bankruptcy Spaces.

• Second floor renovation for U.S. Attorney’s Offices.

• Fifth floor renovation for (1) Court Set, two (2) Judicial Chambers, Clerk and Support Spaces.

• Tenth floor renovation for two (2) Court Sets – one existing, three (3) Judicial Chambers – two (2) existing and one (1) new, Clerks and Support Spaces.

02. Courtroom Requirement

• Systems will be compliant with GSA requirements as outlined in the following:

1. 2018 PBS-P100 Facility Standards for Public Building Service

2. 2021 U.S. Courts Design Guide

03. Design Assumptions

A. Climate (P100 5.3.1)

1. Location: Pittsburgh, PA

2. Heating: 99.6% design condition, 4.3°F

3. Cooling: 0.4% design condition, 88.9°F

B. Indoor Environment

1. Indoor Design Temperature and Humidity

i. Summer: 75°F dry bulb and 55% RH

ii. Winter: 72°F

iii. 5°F deadband between heating and cooling.

C. Heating and Cooling Load Assumptions

1. Occupancy:

i. Office: per seat count, with minimum of one occupant per room.

ii. Courtroom: per seat count, with minimum of one occupant per room.

2. Ventilation

i. Ventilation rates shall comply with ASHRAE 62.1-2013. Values for typical spaces in this project are shown in Table 1. The occupant density for office space has been adjusted to reflect the requirements of PBS P-100 rather than the default occupant density for ASHRAE 62.1.

Mechanical

Table 1: Ventilation Rates

Occupancy Category

People Outdoor Air Rate Area Outdoor Air Rate Default Values

Occupancy Density

Combined Out-door Air Rate cfm/ person L/s person cfm/ft2 L/sm2 #/1000 ft2 or #/100 m2 cfm/ person

L/s person

Cell 5 2.5 0.12 0.6 25 10 4.9 Break Rooms 5 2.5 0.06 0.3 25 7 3.5 Conference/ meeting

5 2.5 0.06 0.3 50 6 3.1

Corridors - - 0.06 0.3 - - - Storage Rooms - - 0.12 0.6 - - - Office Spaces 5 2.5 0.06 0.3 10 11 5.5 Reception Areas

5 2.5 0.06 0.3 30 7 3.5

Telephone/data entry

5 2.5 0.06 0.3 60 6 3

Main entry lobbies

5 2.5 0.06 0.3 10 11 5.5

Computer (not printing)

5 2.5 0.06 0.3 4 20 10

Courtrooms 5 2.5 0.06 0.3 70 6 2.9

Lobbies 5 2.5 0.06 0.3 150 3 2.7

3. Internal Heat Gain

i. Lighting: heat gain from electric lighting shall be considered. LED lighting has a low radiant versus convective heat transfer profile, compared to fluorescent or incandescent lighting. The maximum lighting power density for reworked spaces shall be as follows:

1. Office - Private: 1.11 W/sf

2. Open Office: 0.98 W/sf

3. Conference: 1.23 W/sf

4. Corridor: 0.66 W/sf

5. Restroom: 0.96 W/sf

6. Storage: 0.63 W/sf

ii. Equipment

1. Office - Private: 1.67 W/sf

2. Open Office: 1.67 W/sf

3. Conference: 0.73 W/sf

4. Corridor: 0.7 W/sf

5. Restroom: 0.7 W/sf

6. Storage: 0.31 W/sf

4. Building Enclosure

i. The thermal performance of existing walls is typically difficult to determine. Thermal resistance is assume to be U-0.34 based on masonry construction.

ii. We have assumed an infiltration rate of 0.6 air changes per hour.

iii. We have assumed that existing windows are insulated glass units, without an additional low-e coating (U-56, SC-0.52).

iv. We assume no major upgrades to existing walls will occur by way of our scope of work.

04. Existing HVAC Infrastructure Description

The existing HVAC systems are a mix of older and newer equipment with a central chilled water and steam heating plant providing cooling and heating to the air handling units and terminal equipment. Some equipment within the areas listed above is past its serviceable life and will be replaced within this scope while other equipment can be repurposed for use with the new spaces. The 5th and 10th levels have perimeter finned-tube heat along the exterior walls, some of which is not in serviceable condition.

05. First Floor (U.S. Marshals, Circuit Library, Bankruptcy Clerk Spaces)

The U.S. Marshals space is currently in use and served by an Air Handling Unit (1A) that sits on the Mechanical Mezzanine. The unit is past its serviceable life and will be replaced with a new unit as part of a separate project. For this project, ductwork within the space will be replaced to coordinate with the new floorplan. New, single-duct VAV boxes with electric reheat will be provided for each thermal zone. Ductwork will be provided as required for the revised thermal zoning.

The Circuit Library and Bankruptcy Clerk Spaces are currently shelled spaces served by an Air Handling Unit (1B) which was recently replaced as part of the 2019 SSA. The air handling unit was sized to accommodate the future program. The air handler will be used for the new layout with electric reheat VAV boxes. The existing VAV boxes will be evaluated and reused when possible.

VAV boxes will sized per requirements listed in the P100 Mechanical Performance Requirements table 5.1.

Perimeter zones will be sized at 450 sf/VAV or no more than three individual offices per VAV, whichever requires more boxes, and the interior zones will be sized at 1500 sf/VAV box.

A new exhaust fan will be…