Soldiers & Sailors Memorial: Conditions Survey & - - PowerPoint PPT Presentation

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Soldiers & Sailors Memorial: Conditions Survey & - - PowerPoint PPT Presentation

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Soldiers & Sailors Memorial: Conditions Survey & Restoration Treatment Study Final Presentation Community Board 22 February 2017 NYC Office of Management and Budget Study Team: NYC Department of Perkins Eastman Architects

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Soldiers’ & Sailors’ Memorial: Conditions Survey & Restoration Treatment Study

Final Presentation – Community Board 22 February 2017

Study Team: Perkins Eastman Architects DPC Leslie E. Robertson Associates RLLP GB Geotechnics USA, Inc. Vertical Access Highbridge Materials Consulting Pullman SST, Inc. Louis Berger United Spinal Association RGR Landscape PACO Group, Inc.

NYC Office of Management and Budget NYC Department of Parks and Recreation

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Study Components

Research: Construction and Historic Significance Conditions Assessment: Findings and Recommendations ADA Assessment & Recommendations Cost Estimates

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Soldiers’ & Sailors’ Today

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Soldiers’ & Sailors’ Today

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Soldiers’ & Sailors’ Today

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Construction and Historic Significance

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1902 Dedication

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Construction and Historic Significance

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1917 Decoration Day 1945 Viewing Navy War Ships from the Memorial

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Site Significance and Prominence

1910 to1935 (MCNY/DPR)

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Site Significance and Prominence

1940 to 1975 (DPR/MCNY)

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Background Research Findings

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Historical Background

1899 Plan and Section Details of Plaza Drainage

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N

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Historical Background/Previous Repairs

1920s and 1935 Plaza Images

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N

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1960 – Pre-Restoration Conditions

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Historical Background

1960-62: Last Comprehensive Restoration Campaign

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Findings and Recommendations:

Conditions Assessment

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Conditions Assessment

Monument and Plazas: ~ Findings: Fair to Poor overall condition (Deterioration due to age and lack of drainage) ~ Recommendations: Comprehensive rehabilitation

(Immediate hazards currently stabilized)

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Conditions Assessment

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Total Area:

  • approx. 20,000 SF or .5 acres

Soldiers’ & Sailors’ Monument

N

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Visual Survey 2016

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Visual Survey

Monument Exterior

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Findings and Recommendations

Monument Exterior: ~ Findings: Cracks ~ Recommendations: Crack filler, pinning, Dutchman repairs

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Findings and Recommendations

Monument Exterior: Finial and Consoles ~ Finding: Spalls, failed patches, and fissures ~ Recommendation: Dutchman, patch and crack filler

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Findings and Recommendations

Monument Exterior: Upper and Lower Modillions ~ Findings: Failed Dutchman, crack repairs and ACM in sealant, typ., fissures, and spalls ~ Recommendations: New Dutchman, consolidation, sealant abatement

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Findings and Recommendations

Monument Exterior ~ Findings: Deteriorated mortar, biological growth and open joints ~ Recommendations: 100% Repointing

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Findings and Recommendations

Monument Exterior – Sheet Metal Roofing ~ Findings: Main Roof, Gutter Infill, Cornice – repairable Base of Drum – excessive tears and holes ~ Recommendations: Repair Main Roof, Gutter Infill, Cornice; Replace lower drum roof with liquid-applied membrane

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Findings and Recommendations

Monument Bronze Door ~ Findings: Severe deterioration and inoperable condition ~ Recommendations: Refurbish in off-site facility and reinstall

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Findings and Observations

Monument Interior: Marble and Mosaic Floor ~ Findings: Cracked marble, missing and eroded tesserae ~ Recommendations: Crack repair and replace missing tesserae; repair concrete slab at manhole cover; clean and repatinate bronze

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Findings and Recommendations:

Monument Interior via Drone Survey ~ Findings: Open Joints and efflorescence, typ., selected spalls ~ Recommendations: 100% repointing, Dutchman repairs

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Findings and Recommendations

Monument Interior: Brickwork between Oculus and Guastavino Vault ~ Findings: Open joints and vertical cracks ~ Recommendations: 100% repointing and selective brick stitching

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Findings and Recommendations

Monument Interior – Brick Vault and Adjacent Brick Chamber ~ Findings: Overall good condition with excessive moisture ~ Recommendations: Repair concrete slab at manhole cover

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Findings and Recommendations

Mobilization ~ Recommendations: Enclosed scaffold system

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Visual Survey

Monument Plazas

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Belvedere North Approach Esplanade Upper Terrace Lower Terrace

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Findings and Recommendations

1959 Plan and Section Details of New Drainage Scuppers

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Findings and Recommendations

Site Drainage ~ Findings: Failed drainage system causing collateral deterioration ~ Recommendations: Replace complete paving and drainage system

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Findings and Recommendations

Marble and Sandstone Paving ~ Findings: Heaving and displacement, severe sandstone deterioration ~ Recommendations: Remove and reset marble; replace sandstone with granite or marble pavers; replace substrate and introduce new drainage

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Findings and Recommendations

Granite Veneer Foundation Stones ~ Findings: 100% deteriorated mortar joints, plant growth, displacement, and selective failure ~ Recommendations: Remove plants, grout injection, 100% repointing, selective rebuild of missing and severely displaced units; cordon off areas of loose stone at northern retaining wall

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Findings and Recommendations

Semi-Circular Marble Bench Backs at Belvedere and Flagpole Platform ~ Findings: Severe displacement and outward bowing of stonework ~ Recommendations: Remove and reset marble units above granite benches

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Findings and Recommendations

Limestone Balustrades ~ Findings: Plaza settlement cracks at plinth and full-depth baluster cracks ~ Recommendations: Remove, repair, reset

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Findings and Recommendations

Marble Piers ~ Findings: Missing and failed Dutchman repairs, erosion fissures and cracks ~ Recommendations: Install new marble Dutchman with surgical pins, fill with hydraulic lime patch filler, pin other cracks

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N

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Findings and Recommendations

Marble and Limestone Surfaces (Monument and Balustrades) ~ Findings: Graffiti and soiling ~ Recommendations: Peel Away 7 and Rotec Vortex Micro-abrasion

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Findings and Recommendations:

Structural Assessment

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Structural Assessment

Soldiers’ & Sailors’ Final Presentation

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Rhino model

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Sectional view of the model ready for SAP

Structural Assessment

Soldiers’ & Sailors’ Final Presentation

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Structural Assessment

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Structural Assessment

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Structural Assessment

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Structural Assessment

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Structural Assessment

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Structural Assessment

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Monument

  • Structurally stable under gravity and

NYCBC wind loads

  • Can resist NYCBC earthquake loads but

will experience damage

  • Masonry exterior and interior joints need

to be restored to ensure full bearing contact

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Subsurface Investigation/Scanning/Testing

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Subsurface Investigation/Scanning/Testing Monument Tower Exterior and Interior:

  • Infrared Thermal Imaging
  • Ground penetrating radar/

Metal detectors

  • Ultrasonic pulse velocity
  • Video scoping/Fiber-optic borescope

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Subsurface Investigation/Scanning/Testing

Monument Exterior and Interior – IR scanning performed by GBG

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Findings and Recommendations

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Hazardous Materials

  • Confirmed ACM – Caulking at modillions
  • Assumed ACM – Caulking at window frame and

roofing

  • Confirmed Lead-based Paint – Monument

marble façade wall beige paint

  • Confirmed PCB-containing Materials – Caulking

at balustrade, caulking at terrace paving stones, and caulking at edges of stairways

  • Remediation required as part of restoration
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Findings and Recommendations:

ADA Compliance/Landscape Study

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Walkway To Upper Terrace - Model

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Walkway To Upper Terrace - Rendering

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Walkway To Esplanade - Model

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Potential Bio-swale / Rain Garden

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Cost Estimate

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Cost Estimate

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Total Program Cost, contingent on being bid as a single project:

  • approx. $29- $30 Mil.

Soldiers’ & Sailors’ Monument

N

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Cost Estimate

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Cost Breakdown*

Monument $10,500,000

  • Scaffolding, interior and exterior repairs and repointing, roof

repair, door restoration, interior floor restoration

Plazas, retaining walls, and stairs $17,000,000

  • Demolish and replace foundation slab, remove and reset all

marble stonework, install new marble in place of sandstone, remove, repair and reset balusters, repair and repoint all walls, remove and reset stairs, benches, ornamental bronze

ADA compliant access ramps $1,200,000 Landscaping $700,000

*If project is phased, cost of each phase increases due to escalation and multiple mobilizations.

Soldiers’ & Sailors’ Monument

N

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