1998 - 2008 Disciplinary Actions -
Architects and Engineers
Description of Violation:
"STRUCTURAL FOUNDATION PLANS ARE INADEQUATE IN THAT PLANS ARE NOT COMPLETE AND OF SUFFICIENT CLARITY TO INDICATE THE NATURE AND EXTENT OF PROPOSED SHEET,SHORING,BRACING AND TANGENT PILE WALL FOR+/- 30'(SEC27-157)"
|POST APPROVAL AMENDMENT FOR DOCUMENT 03|
|------------------ * PROFESSIONALLY CERTIFIED * -----------------|
|AUDIT: A - ACCEPTED 11/09/2007|
|Last Action: PLAN EXAM - APPROVED 04/15/2008 (P)|
REVISED PW-1 AND DRAWINGS SUBMITTED HEREWITH TO INDICATE SUPERSEDING STRUCTURAL ENGINEER OF RECORD TO OSCAR WALTERS AS SHOWN.
Special EnforcementProgram Excavation Unit Excavation & Underpinning Practices
Timothy D. Lynch, P.E.
February 19, 2008
Field Checklist for DOB Inspectors
Listed below is schematic checklist
 Check for CORRECT contractors sign
 Check for permits posted in conspicuous place
 Check DOT Street Closure Permits
 Check for valid set of stamped and sealed drawings
 Check for work contrary to plans
 Check for notifying DOB (Rule 52)
 Check to provide 8’ fence
 Check for work without permit
 Check for excavation below 5’ from curb per Rule 52
 Check for excavations between 5’ and 10’ – Access out of site? Ladder
 Check for sheeting shoring bracing along street side and rear garden
 Check for undermining of one story rear extensions – VERY DANGEROUS
 Failure to Protect Adjoining Structure
 Check for defective underpinning
 Check for damage to adjacent buildings
 Neighbor gets DOB : Circumstances Beyond Control
 Check for Failure to Safeguard Public and Property
 Check for shear cut / undermining of adjacent property
NYC Department of Buildings
Special Enforcement Program
280 Broadway, New York, NY 10007
THE FOLLOWING INFORMATION PERTAINS TO THE STOP WORK ORDER
ISSUED AT THIS SITE BY THE SEP EXCAVATION UNIT. ALL CONSTRUCTION
SITES WILL RECEIVE A STOP WORK ORDER FROM THIS UNIT IF ANY OF THE
FOLLOWING CONDITIONS EXIST:
1. No protection at sides of excavation carried to depth of five (5) feet or greater
2. Inadequate details for support of excavation (“SOE”) or foundation work: underpinning, sheeting/shoring/bracing, piling, etc.
3. No TR-1 statements of responsibility on file in BIS for required controlled work
4. No controlled inspector on site during controlled work, as required; or, if present, inadequate controlled inspections are being performed as evidenced by substandard work and lack of conformance to the plans and construction documents
5. No approved plans at the site for SOE and foundation work
6. Performing any construction work not in substantial conformance to approved plans and construction documents
7. Any unsafe condition that endangers workers, public, or adjoining property and structures
The job may be referred to our Engineering Unit if one or more of the above items apply to the site. If referred, an audit will be performed that will include a review of the plans/construction documents, of controlled inspection filings (TR1s), of controlled inspection field logs, and any other applicable documents relating to the site. The engineering audit must be completed and job “released” from Engineering Unit prior to the rescind of the Stop Work Order.
IF BOX IS CHECKED THE SITE IS BEING REFERRED TO ENGINEERING UNIT
To expedite the Engineering audit process, please provide the following:
Copies of DOB approved and perforated architectural, structural, underpinning, shoring drawings; sections and details for all foundations, cellar up to ground floor for the New Building
Surveyor’s site plan and boring logs
Copies of the DOB approved and perforated TR-1s for all structural, underpinning, shoring, and foundation work, including borings
Elevations of the adjacent property line structures with their sub-grade layout
For information regarding the Stop Work Order, please call:
Chief Inspector Miguel Padin, Excavation Inspection Unit at (718) 802-4594
Chief Engineer Tim Lynch, PE, Excavation Engineering Unit, at (212) 566-3398
Structural Engineer Delia Shumway, PE, Excavation Engineering Unit, at (212) 566-3529
Checklist for Engineering Audit of
U/P and SSB design documents
Plot plan showing all adjoining properties and building heights (number of stories, cellar, etc.) The material of adjoining foundation should be indicated (rubble stone, reinforced concrete, CMU, etc)
Plan view showing location of all underpinning
Sections through underpinning showing both sides of lot line (existing foundation and NB foundation), one section for each condition
Sections showing the actual elevation of bottom of NB footing (or bottom of general excavation) and bottom of adjoining footings, allowing us to establish the height of the pins themselves
Details showing box pits, including timber dimensions
Details showing steel reinforcement of concrete pins, if required. Usually provided on multi-lift underpinning
Details showing pin dimensions
Elevation showing sequence of pin excavation. Minimum distance between simultaneous pin excavation must be shown and sequencing notes provided If required, bracing of pin must be shown in plan and elevation
Dry pack and steel wedging detail must be shown
All elements must be dimensioned (rebar, tie backs, lagging boards, structural steel, etc).
Sections must be provided showing isolated column footings or chimney locations within wall (these require special underpinning techniques and may require direct shoring of structural member before underpinning).
Multi-ring underpinning must be clearly indicated. Bracing of upper pins during installation of lower pins should be shown, along with dry pack, wedging, or doweling details (horizontal and vertical) between sections.
Bond breaker shown in sections between adjacent building foundation/underpinning and NB foundation wall.
Sheeting, Shoring, Bracing:
Plot plan must show location of all shoring, dimensioned from property line, including spacing
Sections and elevations must show elevation of toe of sheeting or soldier pile and elevation of top of grade being supported
Dimensions indicating what length of pile out of the ground, and length embedded. Piles that are less than 1:1.5 will require calculations backing up design.
All steel must be dimensioned (raker, whaler, soldier, sheeting, plates, connections, etc). Footing block must be show in plan and section, if required. Connection to footing block must be shown
Excavation Unit Violation Guide
Violations Issued To Professionals
27-157 & DOB Berger Memorandum dated 12/05/86 (“Inadequate Plans”) Architectural/structural plans are not adequate in that plans are not complete and of sufficient clarity to indicate entire nature and extent of proposed excavation, foundation, shoring, underpinning work.
Remedy: Provide revised plans.
27-132 / 27-724 / 27-195
Designated controlled inspector has not adequately performed his inspection duties relating to underpinning, sheeting, shoring, bracing, sheet piling, etc. Note, controlled inspections are only required when underpinning/sheeting/shoring/bracing/sheetpiling are performed at a depth 10 feet or greater from grade, otherwise, the superintendent of construction (semi-controlled inspector) is responsible for this item.
Remedy: Stop all work except to make safe. Notify designated controlled inspector. Provide inspection report by licensed professional engineer or architect for all work subject to controlled inspection heretofore performed.
27-132 / 27-724
Failure to file TR-1 Form (controlled inspector statement of responsibility) prior to the commencement of controlled underpinning, sheeting, shoring, bracing, sheet piling, etc. Remedy: Stop all work except to make site safe. File TR-1 Form.
Inadequate structural design in that design computations do not demonstrate conformance with the applicable standards noted in articles four through twelve of subchapter ten of NYC Building Code.
Remedy: Stop all work. Re-design structure to bring it into compliance with articles four through twelve of subchapter ten of NYC Building Code.
List of sources for historic research on existing buildings
1. DOB Buildings Information System (BIS)
Review addresses for NB site and adjacent lots for all certificates of occupancy. This is useful if the NB site under development is vacant, the applicant or developer can review all the addresses on the vacant lot to determine if buildings existed on site previously. Most likely, vacant lots had buildings previously. The C of O’s frequently indicate whether basements and cellars existed. This can be useful to determine schematic sub-grade structures, old foundation walls etc.
2. New York City Open Accessible Space Information System Cooperative (OASIS) http://www.oasisnyc.net/oasismap.htm
This site maps properties with lot lines, block and lot boundaries and building footprints shown, which is helpful in identifying lot line construction. It will also help identify Landmarked buildings, building Owners, and historic information.
3. New York Public Library (Small fee for replication of drawings)
Sanborn Maps Check NYC Public Library 42nd St, Room 119, Cartography Room. Request tax lot maps of NB site at 20 years intervals going back to 1880 to determine series of previous buildings on site. This has to be drawn on vacant lot as reference data.
4. NYC Department of Buildings Archives (Min. of 2 days, small fee for dwg. replication) Check NYC Dept of Buildings archives for NB site and adjacent construction. DOB records can have old architectural drawings of adjacent construction and old buildings on NB site.
5. New York Historical Society (Same day. Small fee for replication of drawings) Check NY Historical Society archives for NB site and adjacent buildings. Historical archives can have old architectural drawings of these buildings.
6. Professional Plan Finder (Minimum two weeks. Not inexpensive) Professional plan finders may locate hard to find building plans when regular sources do not produce results.
1. Site Probes (Minimum two weeks. Not inexpensive.) Locate test pits in NB site, center and along property lines. Test pits, in conjunction with interpretation of site from desk research, can assist with concealed conditions.
2. Site Surveys of Adjacent Buildings
With the cooperation of neighboring buildings, walk the properties, most particularly, condition and depth of basements and cellars