Air sampling protocol document, 130 Cedar Street, Jan 2005

NYC 9/11 Public Portal Document

130 Cedar Street July 15, 2004 Selective Demolition and Façade Restoration Koenen Associates

3. All masonry which required patching In exposed work, If approved by Architect, • shall be patched neatly with mortar to match appearance of masonry as closely as possible and to the Architect's satisfaction. Rake back joints and use pointing mortar to match as required.

F. Ties and Anchors for Masonry Construction

1. Provide ties and anchors as shown or specified, but not less that one metal tie, spaced not to exceed sixteen (16) inches o.c. horizontally and vertically. Stagger ties in alternate courses. Provide additional ties within 1'-0" of all openings and spaced not more that 24" apart around perimeter-of openings.

4. Anchor masonry to structure complying with the following:

a. Provide an open space not less than 1/2 in width between masonry and structural member, unless otherwise shown. Keep open space free of mortar or other rigid materials

G. Control and Expansion Joints

1. Provide vertical expansion, control and isolation joints in masonry as shown. Build in related items as the masonry work progresses.

2. Control Joint Spacing: If location of control joints Is not shown, place vertical joints spaced not to exceed 30'-0"6 o.c., In addition, locate joints at points of natural weakness in the masonry work, including the following:

a. At structural column or joint between bay. • b. Above control joints in the supporting structure. c. Above major openings at ends of lintels upward and below at ends of sills downward. Place at one side of jamb for openings not less that 3'-0" wide and both sides for openings over 6'-0" wide. d. At reduction of wall thickness e. Where masonry abuts supporting structure. f. If additional joints are required, indicate same on approved shop drawings. H. Untels

1. Install loose steel lintels furnished by Section 05500 allowing adequate bearing at ends as scheduled on Structural Specifications.

2. For concrete block walls where indicated, use specially formed U-shaped concrete block lintels units with reinforcing bars in accordance with the Structural Specifications.

Flashing

1. Provide concealed flashing in masonry work as shown. Prepare masonry surfaces smooth and free from projections. Seal flashing penetrations with adhesive before covering with mortar. Terminate flashing beyond the face of the wall and cut back flush to the face.

Unit Masonry 04200-8

NYC-WTC 000125165