Project Number: AW-2271

Contract Number: TW-0663

November 4, 1994

SPECIAL SPECIFICATION

SECTION 07600

[FLASHING AND SHEET METAL]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Job Conditions 2

1.02 Submittals 2

1.03 Product Delivery, Storage And Handling 2

PART 2 - PRODUCTS

2.01 Materials 2

PART 3 - EXECUTION

3.01 General 3

3.02 Fabrication And Installation 4

SPECIAL SPECIFICATION

SECTION 07600

[FLASHING AND SHEET METAL]{.underline}

# PART 1 - GENERAL

## 1.01 [JOB CONDITIONS]{.underline}

Coordinate metal flashing and trim work with the installation of
roofing, piping, blocking, nailing, framing at openings, curbs, and
other adjoining and substrate work.

## 1.02 [SUBMITTALS]{.underline}

A. [Samples]{.underline}: Submit two 12\" samples of formed metal
products. Submit full range of manufacturer\'s color samples for color
selection.

B. [Manufacturer\'s Literature]{.underline}: Copies indicating
instruction for installation and shop drawings.

C. [Shop Drawings]{.underline}: Submit shop drawings of flashing, sheet
metal, and accessories showing layout, joining, profiles and anchorages.
Layouts at 1/4\" scale, details at 3\" scale.

D. [Provide]{.underline} manufacturer\'s 20 year warranty on prefinished
coating.

## 1.03 [PRODUCT DELIVERY, STORAGE AND HANDLING]{.underline}

A. [Store and handle]{.underline} all flashing and sheet metal items so
as to prevent damage to edges and surfaces.

B. [Do not install]{.underline} damaged items.

# PART 2 - PRODUCTS

## 2.01 [MATERIALS]{.underline}

A. [General]{.underline}: All materials used shall not contain asbestos
fibers.

B. [Galvanized metal]{.underline} shall be commercial quality carbon
steel sheets having no less than .20% copper content, hot dip galvanized
to comply with ASTM A525, 1.25 oz., Commercial Class, gauge as shown or
specified, or 24 gauge if not otherwise required.

C. [Factory finished cap flashing]{.underline} shall be custom formed in
8\'-0\" lengths minimum, with flared continuous front and back edge
cleats.

D. [Materials used for fastenings, hangers, brackets, and similar
usage]{.underline} shall be suitable for the purpose and compatible with
adjacent materials. Use only galvanized steel or corrosion resisting
steel nails and screws for securing galvanized items. For cleats and
similar items, use the same material as used for the item being secured.

E. [Precoated metal]{.underline} shall meet manufacturer\'s requirements
for Dry Film Thickness 0.85-1.05 mils; Pencil Hardness Test - F Pencil
Hardness minimum; Cure Test; Adhesion Test; Flexibility Test; Class
Test; and Color Uniformity. Material shall also meet ASTM tests as
follows: Weatherometer Test ASTM D2244; Humidity Test - ASTM D2247; Salt
Spray Test - ASTM B117; Pollution Resistance Test -ASTM D1308,
Formability Test - ASTM D1737; and Impact Resistance Test -ASTM D2794.
Prefinished galvanized steel shall be coated with Kynar 500 finish, or
equal. Provide 20 year warranty.

F. [Flashing and Trim]{.underline}: All steel brake form flashings/trim
shall be factory formed in 24 gauge steel.

G. [Cap flashing chair]{.underline} (seat) shall be 20 ga. galvanized
steel, as shown on drawings.

H. [Splice plate shall be]{.underline} 24 ga. steel minimum, of 11\"
long shaped to conform to the coping cover; prefinish all exposed edges
to match coping.

# PART 3 - EXECUTION

## 3.01 [GENERAL]{.underline}

A. [Comply with applicable recommendations and details]{.underline} of
the \"Architectural Sheet Metal Manual\" by SMACNA, except as otherwise
shown or specified.

B. [Manufacturer\'s Recommendations]{.underline}: Except as otherwise
shown or specified comply with the recommendations and instructions of
the manufacturer of the sheet metal being installed. Separate dissimilar
metals from each other by painting each metal surface in the area of
contact with a heavy application of bituminous coating or by other
permanent separation as recommended by the manufacturers of the
dissimilar metals. Provide for thermal expansion of running trim,
flashing, and other items exposed for more than 15 feet continuous
length. Maintain a watertight installation at expansion seams. Locate
expansion seams at 10 feet intervals, and two feet each side of corners
and intersections.

## 3.02 [FABRICATION AND INSTALLATION]{.underline}

A. [Fabricate and install work]{.underline} with lines and corners of
exposed units true and accurate. Form exposed faces flat and free of
buckles, excessive waves and avoidable tool marks, considering the
temper and reflectivity of the metal. Provide uniform, neat seams with
minimum exposure of folder, welds, and sealant. Except as otherwise
shown, fold back the sheet metal to form a hem on the concealed side of
exposed edges. Conceal fasteners and expansion provisions wherever
possible in exposed work, and locate so as to minimize the possibility
of leakage. Cover and seal work as required for a watertight
installation. Provide cleat-type anchorage for metal flashing and trim
wherever practical, arranged to relieve stresses from building movement
and thermal expansion. On vertical surfaces lap 2-piece flashings a
minimum of three inches. For embedment of metal flashing, flanges in
roofing or composition flashing or stripping, extend flanges for a
minimum of four inches embedment.

B. [Provide flashings]{.underline} at intersection of roofing materials
with vertical surfaces, at projections through the roof, at curbs for
roof mounted equipment, at terminal edges of roofing, and elsewhere as
shown by the drawings.

C. [Installation of Parapet Cap Flashings]{.underline}: Install
manufacturer\'s standard anchor plates, cap flashing chairs and splice
plates with the cap flashing snapped on the front anchor plate and
screwed to the rear anchor. Top of cap flashing shall slope front to
back a minimum of 1/2\". Front and rear of cap flashing shall be a
minimum of 3-1/2\" in depth. Width of cap flashing shall be sized to
accommodate the wall construction with no greater than 5/8\" variance.

D. [Installation of Mechanical Equipment Supports and Roof
Curbs]{.underline}: Except as otherwise shown or specified, comply with
the recommendations and instructions of the manufacturer. Anchor to deck
with 3/8\" expansion or toggle bolts at 32\" o.c. with a minimum of 2
per side, or as shown on the drawings.

E. [Clean all cap flashing and flashings]{.underline} according to
manufacturer\'s directions.

END OF SECTION