36C25622R0094 089000 Louvers and Vents .docx

REPLACE AHU #104 AND DUCTWORK BLDG. 7

DEPARTMENT OF VETERANS AFFAIRS HEALTH CARE SYSTEM-ALEXANDRIA, LA

PROJECT NO.: 502-19-107

SECTION 08 90 00

LOUVERS AND VENTS

GENERAL

DESCRIPTION

This section specifies fixed and operable wall louvers, door louvers and wall vents.

SUBMITTALS

Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Shop Drawings:

Each type, showing material, finish, size of members, method of assembly, and installation and anchorage details.

Manufacturer's Literature and Data:

Each type of louver and vent.

Color samples.

Blast Design Calculations: Louver System and Anchorage

1. Submit calculations for review and approval prepared by qualified blast consultant, with a minimum of 5 years’ experience in design of blast resistant window systems, verifying louver assembly including anchors comply with specified blast resistance performance. The magnitudes of the design threats W1, W2, and GP1, GP2 are defined in the Physical Security Design Standards Data Definitions which is a document separate from the referenced VA Security Design Manual. The Physical Security Design Standards Data Definitions are provided on a need-to-know basis by the blast/structural engineer performing the blast design on VA projects. It is the responsibility of the engineer of blast resistant windows to request and obtain the Physical Security Design Data Standard Data Definitions from the VA Office of Construction and Facilities Management (CFM). Any associated delays or increased costs due to failure to obtain this information will be borne by the contractor.

APPLICABLE PUBLICATIONS:

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

The Master Painters Institute (MPI):

Approved Product List – Updated Monthly ASTM International (ASTM):

National Association of Architectural Metal Manufacturers (NAAMM):

AMP 500-06 Metal Finishes Manual National Fire Protection Association (NFPA):

90A-15 Installation of Air Conditioning and Ventilating Systems American Architectural Manufacturers Association (AAMA):

2605-13 High Performance Organic Coatings on Architectural Extrusions and Panels Air Movement and Control Association, Inc. (AMCA):

H Department of Veterans Affairs:

VA Physical Security Design Manual for Mission Critical Protected Facilities January 2015

0. Protective Design Center PDC-TR-08 Single Degree of Freedom Structural Response Limits for Antiterrorism Design

PRODUCTS

MATERIALS:

Aluminum, Extruded: ASTM B221M (B221).

Fasteners: Fasteners for securing louvers and wall vents to adjoining construction, except as otherwise specified or indicated in construction documents, to be toggle or expansion bolts of size and type as required for each specific type of installation and service condition.

Where type, size, or spacing of fasteners is not shown or specified, submit shop drawings showing proposed fasteners, and method of installation.

Fasteners for louvers, louver frames, and wire guards to be of stainless steel or aluminum with same finish as louvers.

Fasteners for louvers, louver frames and wire guards within mental health areas to be non-removable/tamper-proof type.

Bituminous Coating: ASTM D1187/D1187M; cold applied asphalt mastic emulsion.

EXTERIOR WALL LOUVERS:

General:

Provide fixed type louvers of size and design shown.

Heads, sills, and jamb sections are to have formed caulking slots or be designed to retain caulking. Head sections are to have exterior drip lip, and sill sections an integral water stop.

Furnish louvers with sill extension or separate sill as shown.

Frame is to be mechanically fastened or welded construction with welds dressed smooth and flush.

Performance Characteristics:

See mechanical drawing for specific required performance characteristics.

Louvers are to bear AMCA certified rating seals for air performance and water penetration ratings.

Aluminum Louvers:

General: Frames, blades, sills, and mullions (sliding interlocking type); 2 mm (0.078-inch) thick extruded 6063-T5 or –T52 aluminum. Blades to be standard type and have reinforcing bosses.

Louvers fixed: Make frame sizes 13 mm (1/2-inch) smaller than openings. Single louvers frames are not to exceed 1676 mm (66 inches) wide. When openings exceed 1676 mm (66 inches), provide twin louvers separated by mullion members.

Louvers are to withstand the effects or gravity loads and the following wind loads and stresses within limits and under conditions indicated without permanent deformation of louver components, noise or metal fatigue caused by louver-blade rattle or flutter, or permanent damage to fasteners and anchors.

Wind load acting inward or outward of not less than 1436 Pa (30 pound per square foot.).

CLOSURE ANGLES AND CLOSURE PLATES:

Fabricate from 2 mm (0.078-inch) thick aluminum.

Provide continuous closure angles and closure plates on inside head, jambs, and sill of exterior wall louvers.

Secure angles and plates to louver frames with screws, and to masonry or concrete with fasteners as indicated in construction documents.

WIRE GUARDS:

Provide wire guards on outside of all exterior louvers, except on exhaust air louvers.

Fabricate frames from 2 mm (0.078-inch) thick extruded or sheet aluminum designed to retain wire mesh.

Wire mesh to be woven from not less than 1.6 mm (0.063-inch) diameter aluminum wire in 13 mm (1/2-inch) square mesh.

Miter corners and join by concealed corner clips or locks extending not less than 57 mm (2-1/4 inches) into rails and stiles. Equip wire guards over 1219 mm (4 feet) in height with a mid-rail constructed as specified for frame components.

Fasten frames to outside of louvers with aluminum of same finish as louvers designed to allow removal and replacement without damage to the wire guard or the louver.

FINISH:

In accordance with NAAMM Metal Finishes Manual: AMP 500-505 Aluminum Louvers:

Organic Finish: AAMA 2605 (Fluorocarbon coating) with total dry film thickness of not less than 0.03 mm (1.2 mil), color to match existing louver color.

Aluminum: Sand blasted satin finish.

PROTECTION:

Provide protection for aluminum against galvanic action wherever dissimilar materials are in contact, by painting the contact surfaces of the dissimilar material with a heavy coat of bituminous coating (complete coverage), or by separating the contact surfaces with a performed synthetic rubber tape having pressure sensitive adhesive coating on one side.

Isolate the aluminum from plaster, concrete and masonry by coating aluminum with zincchromate primer.

Protect finished surfaces from damage during fabrication, erection, and after completion of the work. Strippable plastic coating on organic finish is not approved.

EXECUTION

INSTALLATION:

Set work accurately, in alignment and where indicated in construction documents. Install plumb, level, free of rack and twist, and set parallel or perpendicular as required to line and plane of surface.

Furnish setting drawings and instructions for installation of anchors and for the positioning of items having anchors to be built into masonry construction. Provide temporary bracing for such items until masonry is set.

Provide anchoring devices and fasteners as shown and as necessary for securing louvers to building construction as specified. Power actuated drive pins may be used, except for removal items and where members would be deformed, or substrate damaged by their use.

Set wall louvers in masonry walls during progress of the work. If wall louvers are not delivered to job in time for installation in prepared openings, make provision for later installation. Set in castinplace concrete in prepared openings.

CLEANING AND ADJUSTING:

After installation, all exposed prefinished and plated items and all items fabricated from stainless steel and aluminum are to be cleaned as recommended by the manufacturer and protected from damage until completion of the project.

All movable parts, including hardware, are to be cleaned and adjusted to operate as designed without binding or deformation of the members, so as to be centered in the opening of frame, and where applicable, to have all contact surfaces fit tight and even without forcing or warping the components.

Restore louvers and vents damaged during installation and construction so no evidence remains of corrective work. If results of restoration are unsuccessful, as determined by Contracting Officer Representative (COR) damaged units and replace with new units.

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