SOW HUD Ph 2 2020 06 08.pdf

U.S. General Services Administration

National Capital Region

Public Buildings Service www.gsa.gov

Statement of Work for

Design-Build (D/B) Contract

PROJECT IDENTIFICATION

Project Title: Robert C. Weaver HUD (Department of Housing and Urban Development) Granite Façade

Repairs – Phase 2

Building: Robert C. Weaver

Building ID #: DC0092ZZ

Building Location: 451, 7th Street SW, Washington, DC 20410

Project Control Number:

GSA Work Items: VDC00213, Work Item 1164

RWA #: NA

ePM Number: 55232

SOW Author: Hallie Futterman, Project Manager

Design-Build Statement of Work, v2019.04 HUD Granite Façade Repairs – Phase 2, Robert C. Weaver Building, DC0092ZZ

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TABLE OF CONTENTS

1. PROJECT INFORMATION 6

1.1. PROJECT BACKGROUND 6

1.2. PROJECT SUMMARY DESCRIPTION 6

1.3. PROJECT DELIVERY TYPE 6

1.4. PROJECT GOALS 6

1.5. PROJECT OBJECTIVES 7

1.6. PROJECT BUDGET 7

1.7. PROJECT SCHEDULE 7

1.8. CONTRACT TYPE 7

2. SCOPE OF WORK 8

2.1. CRITERIA GOVERNING DESIGN 8

2.1.1. GSA Requirements 8

2.1.2. Stakeholder Requirements 9

2.2. PROJECT SITE REQUIREMENTS 9

2.2.1. Work Restrictions 9

2.2.2. Working Hours 10

2.2.2.1. Government Occupied Hours 10

2.2.2.2. Contractor's On-Site Working Hours 10

2.2.3. Loading Dock 10

2.2.4. Parking 10

2.2.5. Staging and Storage 10

2.2.6. Dumpster 11

2.2.7. Restrooms/ Office 11

2.2.8. Freight Elevator 11

2.3. PROJECT REQUIREMENTS 11

2.3.1. Base Bid 11

2.3.2. Unit Prices 14

2.4. GENERAL REQUIREMENTS 14

2.4.1. Alternates 14

Alternate 1: An alternate to completely replace the existing lead coated copper stairwell roofs and flashings instead of repairing is requested. The roofing pattern and appearance shall match the existing. New underlayment including waterproofing layer and insulation shall be incorporated.

New flashing comply with SMACNA’s “Architectural Sheet Metal Manual” and roofing shall comply with CDA’s “Copper in Architecture Handbook”. Mock-ups of flashing and roofing work shall be installed for review and approval by the government. Flashing and roofing mock-ups may be incorporated into the work if approved. Error! Bookmark not defined.

2.4.2. Substitutions 14

2.4.3. Cutting & Patching 15

2.4.3.1. Structural Systems 16

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2.4.3.2. Operational Systems 16

2.4.3.3. Visual / Finishes 17

2.5. NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) REQUIREMENTS 17

2.6. NATIONAL HISTORIC PRESERVATION ACT (NHPA) REQUIREMENTS 17

2.7. FINE ARTS REQUIREMENTS 18

2.8. ACCESSIBILITY REQUIREMENTS 18

2.9. SAFETY REQUIREMENTS 19

2.10. FIRE PROTECTION AND LIFE SAFETY REQUIREMENTS 19

2.10.1. Egress/Life Safety 19

2.11. ENVIRONMENTAL REQUIREMENTS 19

2.12. HAZARDOUS MATERIAL REQUIREMENTS 19

2.12.1. General 19

2.12.2. Asbestos Containing Material 19

2.12.3. Lead Based Paint 20

2.12.4. Polychlorinated Biphenyl 21

2.12.5. Presence of Hazardous Materials 21

2.12.6. Hazardous Materials Cost Tracking 21

2.13. SUSTAINABILITY REQUIREMENTS 21

2.13.1. Green Purchasing 21

2.13.2. Key Sustainable Products 21

2.13.3. Proof of Compliance 22

2.13.4. Construction and Demolition Debris 22

2.14. ENERGY AND WATER EFFICIENCY REQUIREMENTS 22

2.14.1. Roof Replacement 22

2.15. SITEWORK REQUIREMENTS 22

2.15.1. Erosion and Sediment Control 22

3.1. PRE-DESIGN PHASE 23

3.1.1. Existing Conditions Survey 23

3.2. DESIGN PHASE 23

3.2.1. Dimensions 23

3.2.2. Design Submissions 23

3.2.2.1. In-Progress DD Submission [65%] 23

3.2.2.2. Pre-Final CD Submission [95%] 23

3.2.2.3. Final CD Submission [100%] 24

3.2.3. Design Submission Deliverables 24

3.2.3.1. Basis of Design / Calculations / Code Check 24

3.2.3.2. Drawings 24

3.2.3.3. Specifications 24

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3.2.3.4. Construction Submittal List 25

3.2.3.5. Estimates 25

3.2.3.6. Schedule 25

3.2.3.7. Phasing Plan 26

3.2.3.8. Constructability Assessment 26

3.2.4. Design Reviews 27

3.2.5. Submission Format 27

3.2.6. Submission Schedule and Reviews 27

3.2.7. Rejection of Submittals 28

3.2.8. Stakeholder Review 28

4. CONSTRUCTION STAGE 28

4.1. GENERAL 28

4.2. PERMITTING 28

4.2.1. Hot Work Permits 29

4.2.2. Utility Locating Services 29

4.2.3. Utility Outage 29

4.2.4. Fire Watch 29

4.3. MATERIAL REQUIREMENTS 29

4.4. CONSTRUCTION SCHEDULE 29

4.5. CONSTRUCTION PROGRESS REPORTS 29

4.6. SHOP DRAWINGS / PRODUCT DATA SUBMISSIONS 30

4.6.1. Early Review 30

4.6.2. Government Review 30

4.6.3. Changes 30

4.6.4. Products for Submission 30

4.7. SCHEDULE OF INSPECTIONS AND TESTS 30

4.8. SPECIAL INSPECTIONS 31

4.9. CONSTRUCTION WORK PLAN 31

4.9.1. Submissions 31

4.10. QUALITY CONTROL PLAN 31

4.10.1. Submissions 32

4.10.2. Content 32

4.10.3. Workmanship Standards 32

4.10.4. Manufacturer's Instructions 32

4.10.5. Specialists 32

4.10.6. Minimum Quality and Quantity 32

4.10.7. Availability of Tradespersons and Manufacturer's Field Services Representatives 32

4.10.8. Inspection / Testing 33

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4.10.9. Test Parameters 33

4.10.10. Test Report 33

4.10.11. Coordination with others 33

4.10.12. Format 34

4.11. CONSTRUCTION INDOOR AIR QUALITY (IAQ) MANAGEMENT 34

4.11.1. Protection of Materials from Moisture Damage 34

4.11.2. Installation and Replacement of Filtration Media 34

4.11.3. Sequence of Finish Installation for Materials 34

4.12. COORDINATION OF WORK 34

4.13. REQUESTS FOR INFORMATION 35

4.14. MODIFICATIONS / CHANGE ORDERS 35

5. CONTRACT ADMINISTRATION 35

5.1. CONTRACTOR’S STAFF 35

5.1.1. Personnel Qualifications 35

5.1.2. Acceptance 35

5.1.3. Personnel Security Requirements 35

5.2. MEETINGS 36

5.2.1. Design Review Meetings 36

5.2.2. Time of Performance Meeting 36

5.2.3. Construction Progress Meetings 36

5.3. ePM (ELECTRONIC PROJECT MANAGEMENT) 36

5.4. PROJECT CLOSEOUT 37

5.4.1. Final Inspection and Test 37

5.4.2. As-Built Drawings 37

5.4.3. Specification Manual 37

5.4.4. Product Data and Shop Drawing Manuals 37

5.4.5. Design Calculation Manual 37

5.4.6. Operation and Maintenance Manual 37

5.4.7. Maintenance Training 37

5.4.8. Warranties 38

5.4.9. Attic Stock 38

5.5. SCHEDULE OF VALUES (SOV) 38

5.6. REQUESTS FOR PAYMENT 38

6. ATTACHMENTS 38

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1. PROJECT INFORMATION

1.1. PROJECT BACKGROUND

The Weaver Building is a 10-story above grade office building, with a basement, sub-basement, and three levels of parking underground, containing approximately 1.4 million gross square feet (gsf) and approximately 1.1 million rentable square feet (rsf). It is on the National Register of Historic Buildings. It was built to house the headquarters of the U.S. Department of Housing and Urban Development (HUD), which has been the only occupant since its completion.

The Building uses massive reinforced concrete elements with form work markings for the building structure and skin. The building is in the shape of an elongated "X" with a central core curving out to diagonal wings. The four building facades are a series of load-bearing precast concrete window wall units stacked ten stories high and three feet thick, allowing deeply recessed windows. The ground level exterior walls are constructed of cast-in-place concrete faced with granite. At the end of each of the four wings are cast-in-place concrete end walls that contain projecting concrete stair towers also faced with granite. It is these end walls which have revealed cracking, physical displacement since their original construction, and broken or missing stone supports, sealants and mortar. The GSA found that the panels on these end walls are in poor shape and are at risk of falling off the building and impacting the building structure and safety of the public and occupants below.

In 2017, GSA awarded a contract to repair the stones identified in the A/E’s investigation and subsequent design. During construction on the SW corner, a number of unforeseen site conditions were uncovered requiring a complete redesign of the support system and the removal and reattachment of all the granite panels. To cover these new requirements the funds allocated to the other three corners were shifted to the Southwest Corner, and temporary shoring was installed at the other corners to provide temporary safety measure for the general public. This project is referred to as Phase 1. The temporary shoring remains in place for the 3 corners that have not yet been completed for safety reasons. Some of the revised Phase 1 design drawings have been attached to this Scope of Work for REFERENCE ONLY. The intent of sharing these documents is to show the Contractor basic information regarding the stones, alignment, elevations, and some of the existing conditions and to inform the Contractor as to how the Phase 1 A/E designed the anchoring system to meet the requirements. The D/B Contractor is NOT required to provide the same design.

1.2. PROJECT SUMMARY DESCRIPTION

This project is referred to as Phase 2. The project includes repairs to the remaining three granite façades of the Robert C. Weaver building including: Removing all stone panels and resetting them with a new anchoring system; structural and architectural concrete repairs; complete repointing and re-sealing of the facade; miscellaneous granite panels crack repairs; kerf repairs; cleaning of the granite façade;

installation of tie off anchors at each stair tower; repairs to the stair roof and flashing associated with the work as well as the use of scaffold and pedestrian protection and shoring on three corners.

Due to site limitations the stone panels will need to be transported off site to a secure facility until they can be repaired prior to being reinstalled on the building. To minimize disruption to the department of Housing and Urban Development and to work within site constraints, it is preferred that the work proceeds one corner at a time, although the contractor will be allowed to start erection of scaffold ahead of time to allow for a continuous work flow for the specialists attaching and removing the stone panels.

1.3. PROJECT DELIVERY TYPE

The project is a Design-Build delivery type.

1.4. PROJECT GOALS

● Complete project within 10% of overall project duration

● Complete project within 10% of overall project budget

● Divert a minimum of 50% (by weight) of construction and demolition waste generated from project

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1.5. PROJECT OBJECTIVES

The project shall be based on the description references here in the Scope of Work, the Attachments noted in Section 6 and the Criteria Governing Design.

The objective of this project is to remove, clean, and securely reinstall all granite panels to the concrete structure utilizing a sufficiently sized anchoring system to provide safe independent structural support for each of the panels and maintain the same exterior appearance in position and spacing to the originally installed condition. The work shall be compliant with the Secretary of the Interior’s Standards for the Treatment of Historic Properties. The execution of the work must be done in a manner so as to minimize impacts to the occupants within the building, pedestrians traffic in and adjacent to the building, operations of the occupied building, and operations of the adjacent building.

1.6. PROJECT BUDGET

Not applicable for Design/Build delivery type. See solicitation for estimated cost of project.

1.7. PROJECT SCHEDULE

The overall period of performance is expected to be 1130 calendar days from Notice to Proceed.

● Design Services – It will be up to the Contractor to determine the best manner to complete design services for the corners (SE, NE and NW) as part of their project approach. The combined Design and Construction services must fall within 1130 calendar days from NTP.

● Construction Services – It will be up to the Contractor to determine the best manner to complete design services for the corners as part of their project approach. The combined

Design and Construction services must fall within 1130 calendar days from NTP.

● Project Closeout – 90 days after Substantial Completion is issued

1.8. CONTRACT TYPE

The Government contemplates the award of a firm fixed-price contract, procured under Design-Build procedures to the successful offeror. The prices shall include, but shall not be limited to the following:

● Professional Architect / Engineer Services

● Contract Management

● Construction Services including Materials, Labor, and Supervision

● Professional Inspection and Testing Services

● Safety Manager, Historic Architect/Conservationist, Quality Control Manager

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2. SCOPE OF WORK

This section details the technical requirements and constraints which the D/B Contractor must account for.

The Scope of Work indicated is not intended to limit the design of the D/B Contractor’s Architect/Engineer.

Variation from the Scope of Work will be considered by GSA, if the proposed change is within the construction budget limitations, meets the objectives for the project, and results in an improved design. GSA must approve all proposed changes in the Scope of Work.

2.1. CRITERIA GOVERNING DESIGN

All design work and related submissions must comply with the documents listed below. The applicable version of each document must be the version current at the time of award of this task order.

Any conflicts or ambiguities within or among the referenced Standards and Criteria Documents, or any deviations from requirements contained in the Standards and Criteria Documents, must be reported to the GSA in writing, for determination as to applicability.

2.1.1. GSA Requirements

● PBS P100, Facilities Standards for the Public Buildings Service, including all applicable

Standards, Criteria and Guides listed therein, 2018

● PBS P100 Requirements Matrix

● PBS P120, Public Buildings Service Cost and Schedule Management Policy Requirements

● Architectural Barriers Act Accessibility Standard (ABAAS)

● PBS Order 3490.2, “Document Security for Sensitive but Unclassified Building Information.”

● PBS CAD Standards

● PBS Building Commissioning Guide

● Guidance for Electric Metering in Federal Buildings

● IAQ Guidelines for Occupied Buildings under Construction

● Occupational Safety and Health regulations for construction and general industry; 29 CFR Parts

1926 and 1910

● Section 01546 – Safety and Health Specification

● International Building Code (IBC)

● International Fire Code (IFC)

● National Fire Protection Association (NFPA) National Fire Codes and Standards

● Egress issues shall meet NFPA 101 (Life Safety Code)

● National Historic Preservation Act of 1966, as amended, and its implementing regulations (36

CFR 800)

● Historic Structure Report (HSR) for the Robert C. Weaver Federal Building

● Secretary of the Interior’s Standards for the Treatment of Historic Properties (36 CFR 68)

● ADM 1022.3: GSA Procedures for Historic Properties

● GSA NCR Preservation Notebook Series and the National Park Service Preservation Briefs and

Tech Notes [Found in the GSA NCR Technical Resources Library]

● GSA Strategic Sustainability Performance Plan

● The Guiding Principles for Sustainable Federal Buildings New Construction and Major

Renovations -OR- Existing Buildings (whichever applies)

● GSA Fine Art Collection Policies & Procedures

● GSA Stormwater Management Submission

● GSA PBS 1000.1 Asbestos Policy

● 40 CFR 61 National Emission Standards for Hazardous Air Pollutants

● 40 CFR 763 Asbestos

● 49 CFR 107 Hazardous Materials Program Procedures

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● 49 CFR 172 Hazardous Materials Table, Special Provisions, Hazardous Materials

Communications, Emergency Response Information, and Training Requirements

All work will be performed in accordance with the latest edition of the IBC, IFC, and the NFPA Codes and standards. GSA’s Fire Protection Engineers are the authority having jurisdiction (AHJ) for all GSA owned facilities. GSA NCR & National Office guidance & policies shall be followed as well. Egress issues shall meet

NFPA 101 (Life Safety Code)

Compliance With Regulations: All work, including contact with and handling of hazardous materials, the disturbance or dismantling of structures containing hazardous materials, and/or the transport and disposal of hazardous materials shall comply with the applicable requirements of 29 CFR 1910/1926, and 40 CFR

761/260-271.

● All thermal systems insulation (i.e., boiler insulation, duct insulation, pipe insulation), surfacing materials (i.e., plaster and sprayed-on fireproofing) and miscellaneous materials (i.e., asphalt flooring, ceiling tiles, adhesives and mastics, drywall, roofing, gaskets and cement board), installed no later than 1980, must be considered asbestos containing unless proven otherwise in accordance with 29 CFR 1926.1101.

● Work involving the disturbance, dismantling or demolition of asbestos containing materials or structures containing asbestos; and/or the removal and disposal of asbestos, shall also comply with the requirements of 40 CFR Part 61, Subparts A and M, and 29 CFR 1915.1001 (where applicable), as well as GSA Specification 020850 (Asbestos Abatement Procedures).

● All finished/painted surfaces of buildings constructed prior to 1978 shall be considered finished with lead based paint unless proven otherwise. Work involving the disturbance, dismantling or demolition of lead based paint shall comply with 29 CFR 1926.62, as well as GSA Specification

020900 (Lead-Based Paint Abatement Procedures). It shall be the responsibility of the Contractor to adequately test and characterize the waste by the toxicity characteristics leaching procedures

(TCLP) – Lead.

2.1.2. Stakeholder Requirements

● State Historic Preservation Office (SHPO) Design Standards and Guidelines

2.2. PROJECT SITE REQUIREMENTS

2.2.1. Work Restrictions

The D/B Contractor will review and document the existing conditions surrounding the project premises. Provide documentation to the Government prior to the Contractor’s proceeding with any construction activities (which include equipment, systems, and material procurement and fabrication).

Structural limitations of the worksite have been provided with this Scope of Work where the pedestrian plaza level worksite sits above other spaces (such as the parking garage, loading dock, etc). The D/B Contractor shall ensure all structural limitations have been gathered and taken into account with the Contractor’s work and phasing plan.

The D/B Contractor shall survey the entire worksite and be familiar with the existing conditions. This includes all areas of the building, structure, and site affected by the removal and demolition work, alterations and new construction work prior to the initiation of any design work. The D/B Contractor shall limit the use of the premises to the work in areas indicated, and to allow for Government occupancy and public use. The height of the work and proximity to the property line will require protection of adjacent private and public property including but not limited to public sidewalk, parking, bus stops, steps, ramps, driveways.

The work shall be sequenced to minimize disruption to building occupants, visitors, and maintenance activities. To the greatest extent feasible, demolition work should not take place until supplies are on

January 4, 2020 10 of 39 hand to perform new work. The building is to remain fully operational throughout the entirety of the project, with no disruption to tenant operations. In order to reduce disruption to building occupants, visitors, and maintenance activities, the Contractor shall plan for all stone repairs to occur off-site and not on the project premises.

The premises will be occupied during performance of work under the contract. All work areas must be cleaned at the end of every work day.

The building ABBAS accessibility and means of egress shall be maintained at all times.

The D/B Contractor shall coordinate all work activity with the GSA Building Manager and the Contracting Officer's Representative to ensure that proper security and access arrangements are made without impact on the construction schedule.

See Attachment A for additional Work Restrictions requirements.

2.2.2. Working Hours

2.2.2.1. Government Occupied Hours

Government personnel are scheduled to occupy the building during the following hours on weekdays, Monday through Friday, except for established Government Holidays, 6:00 AM to 7:00 PM. Contractor may propose early start in summer months with greater daylight.

See Attachments for additional Working Hours requirements.

2.2.2.2. Contractor's On-Site Working Hours

The following work shall be performed outside of Government Occupied Hours or during Early morning working areas as defined in Division 1:

● Noisy and/or odor-producing work that may disrupt tenant operations in adjacent spaces.

Work accomplished outside of Government Occupied Hours shall be performed at no additional cost to the Government. D/B Contractor shall submit a proposed schedule and gain the Contracting Officer's approval at least 72 hours before proceeding with any work during Government Unoccupied Hours.

See Attachment A for additional Working Hours requirements.

2.2.3. Loading Dock

The Loading Dock is not available for use by the D/B Contractor.

2.2.4. Parking

No parking will be available on site during working hours for building occupants. The D/B Contractor and D/B Contractor's employees shall make their own arrangements for vehicle parking off site or within the Contractor’s work area.

2.2.5. Staging and Storage

Limited space on the premises will be made available for the D/B Contractor's storage and related activities, provided that its use will not interfere with operations of the Government. Limited areas may be made available in the parking lot for the D/B Contractor. Off-site staging and storage is acceptable as well. Arrange and gain approval for use of space on the premises must meet the requirements and restrictions set forth in this Scope of Work (and Attachments) and must be approved by the Government prior to mobilizing. All transportation of stone (granite) to and from off-site repair/ storage location shall be the responsibility of the contractor.

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2.2.6. Dumpster

No space is available for dumpster on site. Material is expected to be hauled off at the end of each work shift or must be kept in the Contractor’s work area.

Use of existing building dumpster and trash bins is strictly prohibited.

2.2.7. Restrooms/ Office

No restrooms or offices are available on site for contractor use. Contractor must make their own restroom/ Trailer arrangements. Placement of portable toilets must be approved by the Government.

2.2.8. Freight Elevator

A freight elevator is not available for use at the project site.

2.3. PROJECT REQUIREMENTS

2.3.1. Base Bid

This project requires the removal and reinstallation of all the granite panels from the NW, NE and SE corner of the HUD building, approximately 575 panels per corner. The successful offeror’s A/E will document the current condition of each corner; the alignment of the panels; the relationship between the granite panels and the concrete substrate; the edge conditions in relation to the precast concrete elevations; the condition of the concrete structure, existing anchoring, and existing waterproofing. The D/B Contractor shall be required to remove all granite panels, repair granite panels as needed off-site, repair the concrete substrate behind the granite panels, and reinstall the panels using the D/B Contractor’s approved attachment design so that the panels match the original alignment. The D/B Contractor shall use appropriate historic materials, such as mortar between the granite panels. The mortar joint and mortar mix shall A) match the original mortar joints and materials in color, texture, composition, dimension, and tooling and B) must be fully compatible with the D/B’s proposed structural cladding system, the design of which shall include consideration of the longevity of materials within and immediately adjacent to the system being proposed, so to ensure that neither shall negatively impact the other over a period of time. The D/B Contractor shall maintain the building as watertight at all times, including in areas where there is no waterproofing. It is up to the D/B Contractor to develop an approach to accomplish this work within the schedule allotted and within all site restrictions and constraints. The work must meet all Section 106 Historic Preservation requirements, GSA P100 requirements, structural requirements, and the architectural waterproofing requirements that are further identified below.

Existing Conditions Requirements

The HUD Granite Façade Repair Phase 1 project was only able to accomplish this Scope of Work for the SW corner due to a host of existing conditions that the team ran into upon construction. For the this Scope of Work, the D/B Contractor shall assume and take into account the following, but not limited to, those existing conditions found in Phase 1:

● Under-sizing of and corrosion of the existing anchor system construction made out of a variety of metals (and not stainless steel as was expected and as is required for the new anchoring system designed by this contract).

● Non-square granite panels

● Granite panels in need of repair, including damaged kerfs

● Concrete structure that is in need of repair with both surface and structural deterioration

● Concrete structure that is not plumb to the granite panels

● Non-existent waterproofing between the granite panels and concrete structure

● Missing (or fully corroded) shelf angles

● Deteriorated flashing along the building wings and along the roof

● Uneven and wider than specified gap between the granite stone panels and the concrete backup wall.

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● A variety of existing joint conditions, including soft joints at each floor level, expansion joints, hard mortar joints elsewhere, and weeps.

The D/B Contractor shall use great care to not damage material that is deteriorated. It is anticipated that the anchor system will be replaced, however elements such as the flashing are not required to be replaced and the D/B Contractor shall take care during demolition and installation not to damage those elements. If elements not slated for repair or replacement are damaged by the Contractor, the Contractor will be required to repair and/or replace the elements with approval by the Government.

The existing granite panels used kerfs as a part of the original attachment method. The D/B Contractor shall determine if their proposed attachment design includes repair of the kerfs or fills in the kerfs and utilizes another method of attachment, as the Government has no preference.

Historic Preservation Requirements

Have on staff a Historical Preservation Professional team member (Historic Treatment Specialist) that will review the proposed design solution for conformance with the Secretary of Interior's standards.

The Historic Treatment Specialist Team member shall meet all of the requirements identified in the solicitation for the Historic Preservation Key Personnel. The design must be approved by the D/B Contractor’s Historic Treatment Specialist Key Personnel, and must meet Section 106 requirements and be approved by the Government’s Historic Preservation Officer. The design solution shall reflect the building's original design intent and aesthetic, including maintaining the original granite panel alignment with consistent mortar joints between the panels that match the original in dimension, color, compositions, tooling and finish.

Structural Design Requirements

The Structural Engineer shall meet all of the requirements identified in the solicitation for the Structural Design Key Personnel. The anchoring system shall be developed by the D/B Contractor and shall be reviewed and approved by the Government prior to the Contractor’s proceeding with any construction activities (which include equipment, systems, and material procurement and fabrication).

The anchoring system must allow for all stones to be individually structurally supported, though not necessarily individually removable. All anchors shall be stainless steel. Note the existing alignment of the granite panels (e.g. are they installed horizontally or in relation to the existing wing conditions) and ensure reinstallation conforms to the existing alignment. Fully straightening of the elevations to have them level, plumb and square is not necessarily desirable, however returning panels that have shifted to their original alignment is required. The D/B Contractor shall determine if their proposed attachment design includes repair of the existing kerfs or fills in the kerfs and utilizes another method of attachment, as the Government has no preference. Uneven and wider than expected/specified gap between the granite stone panels and the concrete backup wall may be present in the remaining three granite clad corners. Design for stone supports must address this condition such as but not limited to a range of stone anchor lengths and diameter. It is recommended but not required to remove a few stones at each corner to verify existing conditions and make the stone support design as accurate as possible prior to preparation of final design documents. Wider than specified gap between the granite stone panels and adjacent precast concrete wall may be present in the remaining three granite clad corners. Design for how to fill any such gaps shall be required and included in the Contractor’s price proposal.

Design of the stone support system shall include all gravity, wind, and seismic loads per PBS P100 requirements and ICC/ASCE 7. Design for anchors shall meet ACI requirements for post installed anchors. Design methods including safety factors for the stone panels shall utilize the “Granite” section of the “Dimension Stone Design Manual” published by the Marble Institute of America.

The D/B Contractor shall be required to repair the existing concrete structure, both behind the granite panels and in architecturally exposed concrete areas. These repairs may require repairs to the rebar within the concrete and the D/B Contractor will need to determine how much rebar needs repair and how to complete the repair. See the Attachment – Unit Prices for more detail regarding concrete repairs. The design and procedure for concrete repair shall be a part of the design documentation submitted to the Government for review and approval prior to the Contractor’s proceeding with any

January 4, 2020 13 of 39 construction activities (which include equipment, systems, and material procurement and fabrication).

The Government anticipates minor reinforcing repair work based on work completed in Phase 1.

Repair of the concrete shall be in accordance with the appropriate ACI RAP bulletins, utilizing concrete patching materials matching the existing properties as much as possible, and for exposed surfaces must match the historic appearance including color of the mortar and aggregates, texture, and form markings.

In phase 1, several existing joints were uncovered that were not properly sealed to provide a water-tight condition for the building. Where such conditions are encountered, they must be temporarily protected until permanent sealants or waterproofing is installed by the Contractor.

All design elements shall be incorporated into the design submission, and a mock-up shall be submitted to the Government for review and approval prior to proceeding with Construction. Design submissions shall be submitted to the Government for the Government’s review and approval prior to the Contractor’s proceeding with any construction activities (which include equipment, systems, and material procurement and fabrication).

Shoring Requirements

There is currently emergency shoring being utilized at the 3 corners of the HUD building supporting the granite panels due to weaknesses found in the existing attachment system. The shoring is there for structural and safety reasons. The shoring must stay in place until the D/B Contractor removes the granite panels and there is no more safety risk posed. The D/B Contractor shall include the removal of the emergency shoring into their project approach and work plan, which shall address how the plan meets Safety and Structural requirements. This plan shall be approved by the Government prior to the Contractor’s proceeding with any construction activities (which include equipment, systems, and material procurement and fabrication).

The contract for the emergency shoring is currently being held directly by the Government. The D/B Contractor can select from one of the two approaches below and shall incorporate it and its pricing into their bid:

Approach 1 – Maintain existing shoring utilizing GSA's Shoring contractor as the D/B Contractor’s subcontractor. This would mitigate the need for demolishing and reinstalling the shoring. This would require the D/B Contractor to enter into their own subcontract with Scaffold Resources, GSA’s Shoring contractor. The price of this contract must be incorporated into the D/B Contractor’s bid.

Approach 2 – Demobilize GSA Shoring contractor and utilize a different shoring subcontractor. This would allow the D/B Contractor to enter into a subcontract agreement with the subcontractor of their preference and perhaps obtain a better price than the existing contractor might require utilizing Approach #1. This would require demolishing the existing shoring and reinstalling new shoring until such time that the shoring can be removed as a part of the D/B Contractor’s project plan. The price of this contract must be incorporated into the D/B Contractor’s bid. The Contractor must also include the price to demobilize the existing shoring, which the Government has already negotiated as an Option to the shoring contract and is provided in the bid form.

In addition to shoring, the emergency stabilization included pinning a number of shifted panels to the concrete backup. The contractor shall include removal of the pinning and repair of any holes in a manner acceptable to the Government.

Roof Requirements

The D/B Contractor shall be mindful during demolition and construction to not negatively impact the stairwell roofs. If the D/B Contractor damages the roof during the course of construction, the D/B Contractor will be required to repair that portion of the roof in kind. Any required repairs shall first be submitted to the Government for review and approval prior to the Contractor’s proceeding with any construction activities (which include equipment, systems, and material procurement and fabrication).

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The existing stairwell roofs are lead coated copper in a batten pattern. New flashing shall match the existing materials and comply with SMACNA’s “Architectural Sheet Metal Manual” and roofing shall comply with CDA’s “Copper in Architecture Handbook”.

Mock-up Requirements

Mock-up Req.: Mock-ups and submittals will be required for all proposed materials and products used on the building. In addition, mock-ups will be required that show the proposed repairs and cleaning techniques proposed. Mock-ups required include, but are not limited to:

1) Architectural Concrete repairs - Mock-ups should be completed well in advance of planned installation time to ensure concrete has cured completely and reached its final color. Mock-ups will need to match existing in color, aggregate distribution, texture, tooling, form marks and overall finish. Mock-ups will be required in the building wall and should be a minimum of 2’ x 3’.

2) Granite – The goal of the project is to salvage and reinstall all existing stone. Any prosed replacement panels will need to match existing.

3) Mortar – New mortar joints will need to match the historic in color, texture, composition, dimension, tooling and finish. The mock-up will be required to be viewed in the building wall.

4) Sealant – new sealant will need to be approved for color and placement. Mock-up will be required in the wall.

5) Grout - new grout will need to be approved for color and placement. Mock-up will be required in the wall.

6) Repairs – Mock-ups will be required for all proposed methods of stone repairs to include

Dutchman, consolidant and/or epoxy.

7) Cleaning - Mock-ups will be required for all methods and products proposed for the building cleaning. The gentlest means possible should be utilized and mock-up should be in an indiscreet area on the building.

8) Flashing and Roofing – Mock-ups of flashing and roofing work shall be installed for review and approval by the government. Flashing and roofing mock-ups may be incorporated into the work if approved.

Fall Protection Davit

Four fall protection davits are to be installed at each stairwell as indicated in the drawings. Patching of the roof and new flashing at the davits is required. A design submission by a fall protection engineer, including calculation and signed and sealed drawings, is required for the design of the davits to meet all OSHA requirements. Testing of the completed anchors for the davits shall be included, and the engineer shall also review and certify the installation for use.

2.3.2. Unit Prices

See Attachments for detailed description of Unit Prices being incorporated into this contract.

2.4. GENERAL REQUIREMENTS

2.4.1. Alternates

See Attachments for detailed description of Alternates being incorporated into this contract.

2.4.2. Substitutions

Standard Substitution procedures are outlined in the Attachments – Division 1 specification, for which the D/B Contractor will need to complete and submit to the Government for review and approval. In addition to those requirements, show compliance with requirements for substitutions and the following, as applicable:

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● Coordination information, including a list of changes or modifications needed to other parts of the

Work and to construction performed by the Government and separate contractors that will be necessary to accommodate proposed substitution.

● Detailed comparison of significant qualities of proposed substitution with those of the Work specified. Include annotated copy of applicable specification section. Significant qualities may include attributes such as performance, weight, size, durability, visual effect, sustainable design characteristics, energy and resource performance goals, warranties, and specific features and requirements indicated. Indicate deviations, if any, from the Work specified.

● Product Data, including drawings and descriptions of products and fabrication and installation procedures.

● Samples, where applicable or requested.

● Certificates and qualification data, where applicable or requested.

● List of similar installations for completed projects with project name, location and contact information of owner and architect/engineer of record.

● Material test reports from a qualified testing agency indicating and interpreting test results for compliance with requirements indicated.

● Research reports evidencing compliance with building code in effect for project, when applicable for the proposed substitution.

● Detailed comparison of D/B Contractor's construction schedule using proposed substitution with products specified for the Work. If specified product or method of construction cannot be provided within the Contract Time, include letter from manufacturer, on manufacturer's letterhead, stating date of receipt of purchase order, lack of availability, or delays in delivery. Provide a schedule fragnet with a time impact analysis to allow the Government to consider the proposed substitution.

● Cost information, including a proposal of change, if any, in the Contract Sum.

● Proposed substitution complies with requirements in the Contract Documents except as indicated in substitution request, is compatible with related materials, and is appropriate for applications indicated.

● The Contracting Officer may require the D/B Contractor to provide a Contractor's Waiver of

Rights to additional payment or time that may subsequently become necessary because of failure of proposed substitution to produce indicated results.

2.4.3. Cutting & Patching

Submit a proposal to GSA's representative, describing procedures at least [7] calendar days in advance of the time cutting and patching will initially be performed.

Follow the requirements and procedures identified for Cutting & Patching in the Attachments – Division 1 specifications. In addition to those requirements, include the following information, as applicable:

● Description of the extent of cutting and patching required. Show how it will be performed and indicate why it cannot be avoided.

● Description of the anticipated results in terms of changes to existing construction. Include changes to structural elements and operating components as well as changes in appearance and other significant visual elements.

● List of products to be used and entities that will perform work.

● Dates and hours of operation when cutting and patching will be performed.

● List utilities that will be disturbed or otherwise be affected by work, including those that will be relocated and those that will be out-of-service temporarily. Indicate how long utility service will be disrupted.

● Compatibility and cohesion characteristics of patching compounds with adjacent materials.

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● Details and engineering calculations showing integration of reinforcement with the original structure, where cutting and patching involve adding reinforcement to structural elements.

● Temporary protection of existing structures, surfaces, finishes, equipment, etc. to remain in place during construction.

Approval by GSA to proceed with cutting and patching does not waive the right to later require complete removal and replacement of unsatisfactory work.

All replacement and new materials should match the existing in material, dimensions, color and finish.

All material selections / mock-ups must be reviewed and approved by the GSA Project Manager and/or Customer prior to the Contractor’s material ordering and fabrication.

Replace, patch, and repair material and surfaces cut or damaged by methods and with materials in such a manner as not to void any existing warranties.

All substrates shall be inspected and all observable and/or detectable (whether visually or otherwise) defects shall be repaired prior to the installation of any portion of the Work.

2.4.3.1. Structural Systems

Provide all cutting, drilling, and chasing to produce the work. Do not cut structural beams or major structural elements without the written review and approval of a Licensed Structural Engineer and the General Services Administration. Prior to cutting and/or drilling through any structural member, the D/B Contractor shall conduct ground penetrating radar or similar type of investigative measure to prevent cutting concealed material. Submit structural calculations sealed by licensed Structural Engineer to the Contracting Officer and COR concurrently for approval.

Do not cut and patch structural elements in a manner that would change their load-carrying capacity or load-deflection ratio.

The cutting and patching plan shall include but not be necessarily be limited to work required at the following structural elements:

● Foundation construction.

● Bearing and retaining walls.

● Structural concrete.

● Structural steel.

● Lintels.

● Timber and primary wood framing.

● Structural decking.

● Stair systems.

● Miscellaneous structural metals.

● Exterior curtain-wall construction.

● Equipment supports.

● Piping, ductwork, vessels, and equipment.

● Structural systems of other construction.

2.4.3.2. Operational Systems

Do not cut and patch operating elements, safety related systems, or related components in a manner that would result in reducing their capacity to perform as intended, or that would result in increased maintenance or decreased operational life or safety.

The cutting and patching plan shall include but not be limited to work required on the following operating elements or safety related systems:

● Primary operational systems and equipment.

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● Air or smoke barriers.

● Water, moisture, or vapor barriers.

● Membranes and flashings.

● Fire protection systems.

● Noise and vibration control elements and systems.

2.4.3.3. Visual / Finishes

Destructive testing is permitted to expose concealed conditions during the Design Phase.

Do not cut and patch construction exposed on the exterior or in occupied spaces in a manner that would, in GSA's opinion, reduce the building's aesthetic qualities. Do not cut and patch construction in a manner that would result in visual evidence of cutting and patching. Remove and replace construction that is cut and patched in a visually unsatisfactorily manner.

Retain the original installer or fabricator to cut and patch exposed work if the original installer or fabricator is identified in the Contract Documents or is known to the D/B Contractor and is available for the work. If it is not possible to engage the original installer or fabricator, engage a Specialist who is specifically experienced in the work.

The cutting and patching plan shall include but not be limited to work required at the following visual elements:

● Recessed concrete finishes.

● Stonework and stone masonry.

● Ornamental metal.

● Historic building finishes.

Patched areas shall be neatly trimmed prior to patching. Feather all patches to provide a complete and finished surface. Any design related to removing equipment, brackets, supports, etc. that leaves holes or damaged surface on the floor, walls, and ceilings, the design shall include requirements to patch the damaged surfaces with the same adjacent material and finish.

Any design related to removing equipment, brackets, supports, etc. that leaves holes or damaged surface on the walls, the design shall include requirements to patch the damaged surfaces with the same adjacent material and finish.

2.5. NATIONAL ENVIRONMENTAL POLICY ACT (NEPA) REQUIREMENTS

By Federal Law, National Environmental Policy Act of 1969 applies to all GSA actions and will require analysis and documentation pursuant to the PBS NEPA Desk Guide, October 1999.

This project has had a NEPA/Floodplain Determination completed. An Automatic CATEX applies to this project.

GSA will review each design submission to inform National Environmental Policy Act (NEPA) Compliance. All National Historic Preservation Act (NHPA) compliance actions, if necessary, must be completed before NEPA analysis is finalized. Project implementation will not begin until GSA completes NEPA compliance actions.

2.6. NATIONAL HISTORIC PRESERVATION ACT (NHPA) REQUIREMENTS

The Robert C. Weaver Federal Building is listed in the National Register of Historic Places. All design and construction document development shall be coordinated with the GSA Regional Historic Preservation Office (RHPO). The RHPO will provide guidance on preservation zones and appropriate treatments for all proposed interior and exterior alteration material treatments. Reference Section

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013510 for additional information and to coordinate the development and submission of the below Contract deliverables.

The D/B Contractor shall retain a Historic Treatment Specialist (HTS) to complete the project. The HTS shall meet the Secretary of the Interior’s Professional Qualification for the named discipline. The detailed qualifications for Key Personnel are defined in the Solicitation. The Historic Treatment Specialist will be required to complete the following tasks:

● The HTS must be involved in analysis and design of all alternatives leading up to decisions affecting restoration and rehabilitation

● Zones of the property as defined in the Historic Structure Report (HSR) or shall be used to guide the design process.

● The HTS must review all submissions in their entirety for effects to restoration and rehabilitation zones. Incorporate the HTS’s comments into the submission prior to delivery to GSA. The HTS must certify in writing that the final submission meets the Secretary of the Interior's (DOI)

Standards (SOI). If the submission does not meet DOI Standards, the HTS must provide an explanation.

● Submit three sets of information necessary to achieve design concurrence by the RHPO and the

State Historic Preservation Officer (SHPO). This should include but may not be limited to the information listed below.

○ A project description, explaining the project's preservation issues and how they were resolved in design.

○ Provide special graphics as necessary to illustrate preservation issues.

○ Photographic documentation of locations to be affected by the project to document the existing conditions related to this project. Provide at least one photograph of each different type of space or facade, each historic finish material or assembly, and each different condition to be treated which are potentially affected by this project.

Photographs should be numbered and keyed to a floor plan indicating the location and context of each photograph.

○ Provide annotated floor or site plans with numbers corresponding to photo label numbers and arrows showing the photographer's location and the orientation of each photograph.

○ Archival Project Documentation: Photocopy or provide excerpts of applicable text and illustrations from the building's Historic Structure Report (HSR) to supplement the project description

○ For projects involving ABAAS compliance, report should recommend design solutions which minimize adverse effects on original materials and design.

● Prepare contract specifications for work that affects restoration and rehabilitation zones requiring a restoration specialist. Reference the applicable HSR Outline Specifications (if they exist, usually provided in Chapter 10 of the HSR).

● Review any submittals which show new materials/equipment to be installed in restoration and rehabilitation zones to assure compliance with project's approved design approach.

● Review any submissions proposing methods for protecting historic materials during construction.

● Review all work to ensure restoration work meets contract performance criteria.

2.7. FINE ARTS REQUIREMENTS

It is not anticipated that Fine Arts will be disturbed during work activities.

2.8. ACCESSIBILITY REQUIREMENTS

Architectural Barriers Act Accessibility Standard (ABAAS) is mandatory for all GSA projects. If local accessibility standards exist, the D/B Contractor must follow the most stringent requirements between the local standards and…