FIRE RATED - FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-IN, SIDE HUNG-OUT, VERTICAL SLIDER, HORIZONTAL SLIDER
PART 1 - GENERAL
Work Included
Furnish & install fixed cold-formed fire rated steel windows as shown in the contract drawings. Work shall include but not be limited to steel windows (fixed, project-in, project-out, side hung - in, side hung - out, vertical slider, horizontal slider), trim, anchors, and factory applied finishes (if required).
General:
Fire rated or labeled windows are used in window openings where it is necessary to restrict the spread of fire and smoke within buildings, whether from interior fire or external fire. The determination as to where a fire rated window is required is governed by the building code and federal and state laws. The architect should follow these codes. Individual manufacturers should be contacted to determine which of their windows meet the fire rated window requirements.
Only labeled windows shall be used in window openings requiring fire rated windows. The label on hour fire windows for wall openings will stipulate testing laboratory. Fire rated windows shall conform to applicable specification of NFPA-257 and NFPA Standard 80.
Maximum size opening
Heavy intermediate, heavy custom, cold rolled, and industrial windows will be used for openings not exceeding 84 sq. ft. in area with neither dimension exceeding 12 ft. unless otherwise tested. When multiple windows are installed, the distance between unprotected vertical steel mullions shall not exceed 7 ft.
Standard intermediate types may be used for openings not exceeding 60 sq. ft. in area with neither dimension exceeding 10 ft. unless otherwise tested. When multiple units are installed, the distance between unprotected steel mullions shall not exceed 6 ft.
Related Work
| A. |
Glass, glazing, and glazing materials: Section 08800 |
| B. |
Perimeter caulking and sealing: Section 07900 |
| C. |
Miscellaneous structural items: Section 05500 |
Quality Assurance, Performance Requirements
When tested in the closed and latched position, weather stripped windows shall meet or exceed the following standards:
Air Infiltration Test
ASTM E238 - Maximum air infiltration 0.37 CFM/FT of crack length with a pressure differential of 6.24 PSF (50 MPH)
Water Penetration Test
ASTM E331 - No water penetration for 15 minutes when the window is subjected to a rate of flow of 5 Gal./Hr./Sq. Ft. with a pressure differential of 2.86 PSF.
Submittals
Submit shop drawings showing window and installation details, including anchorage, fastening and recommended sealing methods. Show dimensioned elevations with opening and window sizes. Upon request, provide test reports for all pertinent standards.
Construction
Operable fire rated windows shall be provided with a mechanism that will allow the ventilator to self-close and remain closed at a specified temperature (typically 165&Mac176; F).
PART 2 - PRODUCTS
Approved Manufacturers
Windows shall be provided by a manufacturer and/or distributor of steel fire rated windows whose products meet the Steel Window Institute's performance specifications, as set forth herein or in effect from time to time.
Materials
| A. |
The frame and ventilator shall be composed of ASTM A528 low carbon cold rolled formed steel sections with a minimum thickness of 20 gauge. |
| B. |
Windows shall be defined and categorized as commercial and industrial windows with a minimum combined weight of frame and ventilator of 2.75 lbs. Per linear foot and capable of passing a structural load test of 30 lbs per square foot. |
| C. |
The Frame and ventilator sections shall have a minimum front to back depth dimension of 1 7/8". Maximum recommended ventilator sizes are as follows (W x H): |
Delete listings below, not required:
Casement (in or out): 2.5 ft X 6.0 ft
Projected (in or out): 5.0 ft X 3.0 ft
Vertical Slider: 4.6 ft X 4.0 ft
Horizontal Slider 3.0 ft X 6.0 ft
D. Glass
| |
Only labeled fire protection rated glazing material shall be used in fire rated windows. The individual glazing material exposed area shall not exceed 1296 sq. in. with no dimension exceeding 54 in. unless otherwise tested. Consult window manufacturer. When continuous glazing angles or channels are used to hold glass in a window, these continuous members must be steel. |
| E. |
Muntin bars shall have a tee shaped face min. of 1 1/4". |
| F. |
Glazing beads shall be cold rolled steel with a minimum thickness of 20 gauge. |
| G. |
Weather stripping shall be extruded vinyl or EPDM |
| H. |
Hardware shall be as follows: |
Delete listings below, not required:
1. Project In:
| a. |
Ventilators shall be hung on either steel balance arms or heavy-duty steel or stainless steel three or four-bar hinges located at each jamb. |
| b. |
Bronze or steel cam latch or spring catches located at the head of the ventilator. |
2. Project Out:
| a. |
Ventilators shall be hung on either steel balance arms or heavy-duty steel or stainless steel three or four-bar hinges located at each jamb. |
| b. |
Bronze or steel cam latch located at the top rail of the ventilator. |
3. Side Hung Outswing Casement:
| a. |
Ventilators shall be hung on either steel, malleable iron or aluminum-bronze hinges with non-ferrous or galvanized pins and bushings. Hinges shall be close or extension type. |
| b. |
Bronze or steel cam latch located at the jamb of the ventilator. |
4. Side Hung Inswing Casement:
| a. |
Ventilators shall be hung on either steel, malleable iron or aluminum-bronze hinges with non-ferrous or galvanized pins and bushings. Hinges shall be close or extension type. |
| b. |
Bronze or steel cam latch or spring catch located at the jamb of the ventilator. |
5. Vertical Slider:
| a. |
Single and double hung ventilators shall be fully counter-balanced at any desired position by means of adjustable balance mechanisms. |
| b. |
Bronze or steel lift handle located at the sill of the ventilator. Bronze or steel sweep catch located at the ventilator meeting rails. |
6. Horizontal Slider:
| |
Ventilator supported by stainless steel or bronze rollers that are guided by a track either in the frame head or sill |
| |
Bronze or steel lift handle located at the jamb of the ventilator. Bronze or steel sweep catch located at the ventilator meeting rails. |
I. Insect Screens
| 1. |
Insect screen frames shall be formed electro-galvanized steel having a minimum thickness of 0.032", or of formed or extruded aluminum having a minimum thickness of 0.040". |
| 2. |
Screens shall be rewirable with 18 x 16 mesh wire cloth of aluminum or fiberglass/ The nominal diameter of the cloth shall not be less than 0.011" for aluminum. |
Fabrication
| A. |
Fabricate windows in accordance with the approved shop drawings. |
| B. |
Frame and ventilator sections shall be cold formed and members shall be mitered and key cornered. A butyl sealant shall be applied and corners shall be mechanically fastened so as to create a close fit. |
| C. |
Muntin bars shall be true muntins and be continuous from head to sill and jamb to jamb except that bars in one direction may be discontinuous if they are notched and securely fastened at the intersection. Muntins shall be mechanically fastened to the frame or ventilator sections. |
| D. |
All windows shall be designed for either inside or outside glazing. |
| E. |
Hardware
Operable fire rated windows shall have manufacturer's standard approved hardware. |
F. Insect Screens
| 1. |
Screens with hinged or sliding wickets shall be provided. |
| 2. |
The wire cloth shall be held taut with removable spline |
| 3. |
Screens shall be removable from the window, held in place by clips. |
G. Finish
| |
All cold rolled sections shall be pretreated and coated using manufacturer's standard finish. |
PART 3 - EXECUTION
Inspection
| A. |
Fire rated windows must be securely fastened to the wall opening and be capable of resisting all wind and other stresses for which the window was designed. Window manufacturer is not responsible for fire rating of adjacent walls. |
| B. |
Window openings shall conform to details and dimensions shown on the approved shop drawings. |
| C. |
Conditions that may adversely affect the window installation must be corrected by the General Contractor prior to installation. |
Installation
| A. |
Windows specified under this section shall be installed by experienced personnel. |
| B. |
Install windows in strict accordance with the approved shop drawings and all local, state, and national laws and building codes. |
| C. |
Set windows plumb, level, and true to line, without warp or rack of frames or ventilators. |
| D. |
Anchor windows securely to surrounding construction with approved fasteners. |
| E. |
The exterior joints between the windows, trim and mullions shall be properly sealed watertight with an approved sealant and be neatly pointed. |
| F. |
Adjust ventilators to operate smoothly, free from twist, and to be watertight when closed and locked. |
| G. |
Any abraded surface of the window finish shall be cleaned and touched up with air dry paint, ad approved and furnished by the window manufacturer, in a color to match the factory applied finish. |
Cleaning
| A. |
The General Contractor shall be responsible for protecting the windows and related materials during storage on the job and during and after installation. |
| B. |
Window installer shall leave the window surfaces clean after installation, exercising care to avoid damage to protective coatings and finishes. |
| C. |
Any protection necessary due to the cleaning of materials adjacent to the windows shall be the responsibility of the General Contractor. |
© The Steel Window Institute (2006) Contents are the property of the Steel Window Institute, its members or others who have licensed the information. All rights reserved.
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SPECIFICATIONS: COLD ROLLED LINKS
WINDOWS FROM COLD-ROLLED SECTIONS
FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-IN, SIDE HUNG-OUT, VERTICAL SLIDER, HORIZONTAL SLIDER
FIRE RATED - FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-IN, SIDE HUNG-OUT, VERTICAL SLIDER, HORIZONTAL SLIDER
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