Building PROJECT

Welcome to Chapin’s community resource page for the school’s current building project. In order to better support our educational goals, we are expanding our school’s programmatic space. We hope you’ll read more about this in our Academic Mission section below. This page will be updated when new information is available, so please check back regularly.

Questions or comments are welcome and may be directed to our community contact number, 212.606.3225, or to the email address These inquiries will be answered as soon as possible. (Other non-emergency reports should be directed to 311 and emergencies to 911.)

DATE: The date of Chapin’s next Community Construction Committee (CCC) meeting is October 17, 2017 at 6:30 p.m.

SIX-WEEK LOOK-AHEAD (September - Mid-October)

Early to Late September

Continued caisson work and crane arrival preparation:

  • Caisson work: rebar installation; grouting; testing
  • Crane grillage (steel platform framework) delivery over a weekend in late September (9/23-9/24 tentative dates); possible short term street closure

Late September - October:

Anticipated tower crane arrival and installation:

  • Tower crane delivery: after grillage is installed, before the end of October (Chapin will provide neighbors with advance notice of exact crane delivery date, once confirmed)
  • Ongoing selective removals (demolition)
  • Ongoing steel installation (hand-set)
  • Ongoing interior finish installations
  • Interior and exterior mechanical systems work
  • Exterior scaffold installations


Please click HERE for meeting materials shown at the September 6, 2017 Community Construction Committee Meeting.


Click HERE and HERE to view DOB permits issued for the period of April 13, 2017 through April 20, 2018.



As of September 6, 2017

Our school’s building project is now at a phase where a crane will be used at the site. Below are answers to community questions regarding the crane and its operation.

Our number one priority is the safety of our neighborhood and our school community. As we move forward, please let us know if you have further questions regarding crane operations. Email or call 212-606-3225. We plan to discuss the crane and upcoming construction at our neighborhood-wide meeting on Wednesday, September 6th.

Type of Tower Crane: Leibherr-542 HC-L (electric Tower Crane- mounted on a mast and fixed in place) Luffing boom

New York State Licensed professional engineers are required by city regulation to submit plans related to the crane’s assembly and operations at the job site.

They “design” the crane for usage as it relates to the type of crane, the work the crane will perform, the limitations of the existing footprint and the needs of the new structure.


All of the designs listed below must adhere to the rules and regulations set forth by building codes, OSHA regulations, cranes and derricks, as well as the crane’s manufacturer specifications.

  • placement of the crane at the job site
  • placement of the crane as it relates to the roadway and the surrounding buildings and sidewalks
  • placement of the crane as it relates to the existing structure
  • placement of the crane is it relates to the needs of the new structure
  • tie-back (a steel structural support piece) into the building
  • configuration of crane as it relates to weather (weather vane mode)
  • configuration of the crane as it relates to current site conditions, i.e. hoist, sidewalk shed and pedestrian walkway

Crane Approval and Inspections:

  • The crane is fully reviewed and approved by the NYC Department of Buildings (DOB) Cranes and Derricks division.
  • There are multiple stages to obtaining approval from DOB/Cranes and Derricks to assemble a Tower Crane. Each stage requires inspections of the physical components of the crane prior to assembly onsite.
  • These inspections are made by inspection agencies hired by the professional team responsible for that particular stage of planning or assembly.
  • Inspections also take place during the onsite crane assembly.DOB/Cranes and Derricks will give permission to assemble the crane AFTER it has passed an Unassembled Inspection.
  • DOB/Cranes and Derricks will give permission to operate the crane AFTER it has passed an Assembled Inspection.

Crane Installation:

  • New York City requires a “licensed rigger/Master Rigger” to supervise the assembly or disassembly of a tower crane.
  • Crane Schedule
    • Crane Grillage: (TENTATIVE) 9/23–9/24.
      • Possible short-term closure of 84th Street between York and East End Avenues.
    • Tower Crane delivery: Crane to be delivered sometime between the completion of the Crane Grillage installation and the end of October, pending weather and the requisite city regulations.
      • 2-day closure of 84th Street, between York and East End Avenues, required.
  • During the tower crane’s grillage installation, a hydraulic crane will be used as an “assist crane” on East 84th Street. To temporarily accommodate the assist crane, East 84th Street will be closed for the day on a Saturday that is dictated by the NYC Department of Transportation (DOT). A second Saturday will be selected as a back-up day in case of inclement weather.

Crane Support:

  • The crane is supported by 6 caissons drilled 50 feet into the ground, including 20 feet of bedrock to further anchor the crane. A steel platform, known as a “grillage,” acts as the foundation and provides a base for the tower crane.
  • The Tower crane at Chapin was engineered to tie into the building at the 9th floor; a steel collar, with 3 struts will be placed around the tower section of the crane and three steel struts will be “tied” into the existing structure providing added support and stability to the crane.
  • The collar and the tie-back is designed by an engineer to meet the needs and the usage of the crane and the project.
  • The engineer who designed the crane for use on this project determined that it should be “tied” into the building at the 9th floor. The elevation at which the crane is going to be “tied” into the building was fully reviewed and approved by DOB.
  • As required by the NYC Department of Buildings, liability insurance in the amount of $80 million is carried for crane use.

Supervision and Oversight:

A licensed maintenance engineer from Stonebridge inspects the crane daily while the crane is in use. Stonebridge is the steel erector company that will use the crane. A monthly inspection will be performed by a service technician employed by the rental company of the crane (Morrow) and with SSE, regardless of crane usage. In addition, a weekly visual inspection of the crane will be conducted by Stonebridge, regardless of usage.

JRM, in conjunction with Stonebridge, supervises all construction activity. There is a JRM supervisor on duty for each shift at all times, whether school is in or out of session. In addition, there is a Site Safety supervisor on site at all times, as well as a Chapin construction site representative.

Crane Schedule/Timeline:

Following inspection and DOB approval, the crane will be available for use from October 2017 until June 2018 for three essential construction components as well as smaller projects:

  1. Steel erection on the north side of the school building in preparation of additional floors (in the 6-8 floor area).
  2. Steel erection on the south/East 84th Street side of the building (in the 6-8 floor area).
  3. Removal of mechanical equipment and installation of new mechanical (HVAC) equipment.

In addition to crane operations on Saturdays during the fall of 2017, the crane will be used during long weekends and vacations throughout the academic school year of 2017-2018.

During the next phase of crane operations, other construction activity will continue. Depending on the crane strategy, there will be approximately 10-20 workers dedicated to the exterior steel component of the project. An additional 30-40 workers will concentrate on interior work, retrofitting mechanical equipment, weatherproofing and installing interior finishes.

Use of Crane:

  • Crane Operator’s in NYC must possess a Hoisting Machine Operators License.
  • Trucks carrying supplies will approach from York Avenue and pull into the shed entrance head first. To exit, those trucks will reverse out of the shed and drive toward and out onto East End Avenue.
  • The crane will pick up materials from within the sidewalk bridge and on school property.
  • The crane’s rotation, when in use, will be toward the school building. During operation, the crane will not extend or lift materials over any of the neighboring buildings.
  • The counterweight will extend over a portion of East 84th Street.
  • When picks are in progress, certified flag people will be positioned at key locations to temporarily halt pedestrian and vehicular traffic.

When Crane is not in Operation:

When work is completed each day, the crane will be placed in “weathervane mode.” This means that the crane will be able to pivot to independently adjust its position depending upon the wind.

The “turntable” is capable of “swinging” “pivoting” 360 degrees.

Weather Conditions:

NYC’s current regulations set a wind speed operational limit of 30 mph. The crane is equipped with an anemometer to measure wind speed during operation on site, and JRM is installing an additional weather station located on a railing on the top floor of the hoist platform to further monitor weather conditions. If conditions dictate that the crane should not be used, operation will cease and it will be placed in weathervane mode. DOB issues weather advisories aimed at monitoring crane use. DOB can also cease crane use in anticipation of extreme weather.

Questions? Please email or call 212-606-3225


    Please click HERE for front exterior view. Please click HERE for an 84th Street elevation.


      Chapin held monthly Community Construction Committee (CCC) meeting from 6:30 p.m. to 7:30 p.m. for neighbors on the following dates in 2016:

      • March 14, April 26, May 31, June 29, July 26, August 30, September 27, October 26, November 29 & December 19.


      • Chapin appeared before the NYC Board of Standards and Appeals (BSA) on Tuesday, September 1, 2015.
      • Chapin appeared before the NYC Board of Standards and Appeals (BSA) on Tuesday, July 14, 2015.
      • The Chapin School and Manhattan Community Board 8 invites neighbors to Chapin for an informational meeting on Thursday evening, June 4, from 6 p.m. to 7 p.m. regarding the interior work currently underway to improve Chapin’s food service areas in the school’s basement. This work is independent of the proposed expansion project now under review by the NYC Board of Standards and Appeals.
      • Chapin presented its application before the NYC Board of Standards and Appeals (BSA) on Tuesday, May 12.
      • Click HERE to view a May 29, 2015 letter posted in buildings and sent to neighbors who have provided their email addresses to Chapin.
      • Click HERE to view a letter sent May 15, 2015 to neighbors who have provided their email addresses to Chapin.
      • The information and slides below were shared at the community meeting held for neighbors at Chapin the evening of Wednesday, April 29, 2015

      Click HERE for a project overview.

      Click HERE for a diagram of the construction area.

      Click HERE for May 2015-January 2016 logistics and 84th Street protection.

      Click HERE for additional logistical information related to summer work.

      Click HERE for a diagram of the covered pedestrian walkway on 84th Street.

      • Click HERE to view a letter distributed to neighbors on April 22, 2015.

      • Click HERE to view a letter distributed to neighbors on March 13, 2015.


      Mission Statement

      The Chapin School prepares a diverse and talented community of young women to thrive and lead in a global society through its dedication to academic excellence, personal integrity and community responsibility. Chapin cultivates in each student a love of learning, independent thinking, emotional resilience and a dedication to serving others.

      Under One Roof

      Miss Chapin’s extraordinary foresight in establishing our 100 East End Avenue location in 1928 has allowed Chapin’s leadership to plan renovations that meet our girls’ evolving needs while keeping the entire school together in this historic location—a rarity in New York City.

      Charting our Path

      For several years now, with the input of faculty, parents, alumnae and students, our planning groups have explored programmatic needs and associated space requirements in these areas:

      • Music and the performing arts
      • Athletics, fitness and play
      • Flexible classrooms and experiential learning
      • Student support
      • Professional Community support
      • Community

      In addition, we have responded to our January 2014 NYSAIS reaccreditation report, which encouraged us to evaluate our facilities to ensure they reflect and support the aspirations of our current strategic plan, the focus of which is teaching and learning.

      Based on this work, the school has created a plan that envisions the following enhancements to the Chapin footprint:

      • Additional dining space to better accommodate our K–12 student population
      • Adding a regulation-size gymnasium, rooftop turf practice field and fitness center to meet team requirements, better integrate play and exercise into our girls’ day-to-day routines and accommodate community gatherings
      • Establishing facilities for an expanded Performing Arts program
      • New flexible classrooms, a design studio and "maker" spaces that will promote collaboration, flexibility and research

      This plan focuses on ensuring that students have access to the resources they need to succeed. Please click HERE to view a schematic drawing of the current plan. Click HERE to see photographic representations of how the building might look upon completion.

      To make these changes, Chapin applied to the NYC Board of Standards and Appeals (BSA) for approval. As a first step, Chapin appeared before Community Board 8 on January 14, 2015, in a public hearing on our application. We look forward to continuing to work with our neighbors and participating in the BSA’s public review process.

      BSA approval will give us the flexibility to undertake renovations during the next several years. While we’re still working on many specifics, we intend to begin construction in the summer of 2015.

      100 East End Avenue

      New York, NY 10028

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