NYC 9/11 Public Portal Document
130 Cedar Street July 15, 2004
Selective Demolition and Façade Restoration Koenen Associates
A. After mortar has fully hardened, thoroughly clean exposed masonry surfaces of excess
mortar and foreign matter, use wood scrapers, stiff-nylon or -fiber brushes, and clean
water, spray applied at low pressure.
1. Do not use metal scrapers or brushes.
2. Do not use acidic or alkaline cleaners.
B. Wash adjacent woodwork and other non-masonry surfaces. Use detergent and soft
brushes or cloths.
C. Clean masonry debris from roof; remove debris from gutters and downspouts. Rinse
off roof and flush gutters and downspouts.
D. Sweep and rake adjacent pavement and grounds to remove masonry debris. Where
necessary, pressure wash surfaces to remove mortar, dust, dirt, and stains.
3.11 FIELD QUALITY CONTROL
A. Inspectors: Owner will engage qualified independent inspectors to perform inspections
and prepare test reports. Allow Inspectors use of lift devices and scaffolding, as
needed, to perform inspections.
B. Architect's Project Representatives: Architect will assign Project representatives to
help carry out Architect's responsibilities at the site, including observing progress and
quality of portion of the Work completed. Allow Architect's Project representatives use
of scaffolding, as needed, to observe progress and quality of portion of the Work
completed.
C. Notify Structural Engineer in advance of times when lift devices and scaffolding will be
relocated. Do not relocate lift devices and scaffolding until inspectors and Architect's
Project representatives] have had reasonable opportunity to make inspections and
observations of work areas at lift device or scaffold location.
END OF SECTION 04901
C
•
CLAY MASONRY RESTORATION AND CLEANING 04901 -15
NYC-WTC 000125182
OCR can misread numbers and units. Confirm readings against the page image before using them.