HOME ABOUT US MEMBER COMPANIES THE MANY REASONS TO USE STEEL WINDOWS AND DOORS SPECIFICATIONS / INSTALLATION PRODUCTS REPLACEMENT VS. RESTORATION RECYCLABILITY STATEMENT FAQ's CONTACT US     GENERAL SPECIFICATIONS ARCHITECT'S GUIDE TO STEEL WINDOWS SPECIFICATIONS: COLD ROLLED SPECIFICATIONS: HOT ROLLED GUIDELINES ON HOW TO INSTALL STEEL WINDOWS   WINDOWS FROM HOT-ROLLED SECTIONS Material These windows are made from solid steel sections which have been hot-rolled from new billet steel into carefully designed profiles or shapes to form frame assemblies and ventilator assemblies. There are four types of hot-rolled steel windows, defined and categorized by the weight per lineal foot of the combined frame and vent members. The categories are: Light Intermediate - 2.0; Standard Intermediate - 3.0; Heavy Intermediate - 3.5; Heavy Custom - 4.2. Construction A. Window frame and ventilator sections shall be solid, one-piece sections with welded and dressed corners. B. Flanges forming the weathering contacts shall be rolled integral with sections to provide close contact with both inside and outside points of closure. C. Weatherstripped Ventilators. 1. All operable windows shall be provided with weatherstripping, such that when tested in the closed and locked position in accordance with ASTM E-283 before leaving the factory, the air infiltration shall not exceed 0.37 cubic foot per minute per foot of crack length when subjected to a pressure differential across the window of 6.24 pounds per square foot equivalent to a wind velocity of 50 miles per hour. 2. All operable windows shall be provided with weatherstripping, such that when tested in the closed and locked position in accordance with ASTM E331, no water penetrates for 15 minutes when a window is subjected to a rate of flow of 5 gal/hr./sq. ft. with a pressure differential across the window at 2.86 PSF. D. Non-weatherstripped Ventilators. 1. The metal to metal contacts between non-weatherstripped ventilators and frames shall, when ventilators are closed and locked before leaving the factory, be as follows: a. In side-hung ventilators it shall be impossible to freely insert (without forcing) a steel feeler gauge 2" wide by 0.020" thick between the inside contact of more than 40% of such contacts. b. In projected ventilators it shall be impossible to freely insert (without forcing) a steel feeler gauge 2" wide by 0.031" thick between more than 40% of such contacts. c. The foregoing limits air infiltration to a maximum of 1 cu. ft. per minute per lineal foot of crack length when subjected to a pressure differential across the window of 1.56 pounds per square foot equivalent to a wind velocity of 25 miles per hour. d. Muntin bars, except where interrupted by ventilators, shall be interlocked and continuous from head to sill and jamb to jamb except that bars in one direction may be discontinuous if they are securely welded at the intersection. Muntin bars shall be coped, tenoned and riveted, or solidly welded to their outer frames. e. Outside frame members shall be of unequal leg design, to lap masonry by not less than 1/2". To meet special conditions, outside frame members may have equal legs, or equal legs with attached continuous fins. f. The manufacturer will provide a drip member above all open-out, side-hinged ventilators. Bottom perimeter frame member for projected and side-hinged ventilators shall have weep holes or notches leading to the exterior. Industrial Windows Material Principal members shall be hot-rolled new billet steel. These members shall be nominally 1-3/8" in depth, except that members nominally 1-1/4" in depth may be used provided frame and ventilator corners are welded. Muntin bars to be continuous from head to sill and jamb to jamb. Sections shall be nominally 1/8" in thickness. Applied weathering members shall be hot or cold-rolled low carbon steel, nominally 0.060" thick. Maximum Vent Sizes Industrial Projected and Pivoted Windows Only. The recommended maximum sizes of ventilators shall be 5'0" in width and 2'8" in height, with vertical muntins in ventilators as shown on standard types. Dimensions are taken from center to center of the webs of the fixed bars framing the ventilators. Construction Framing members shall be welded or interlocked rigidly at joints with accurate and close fits. Welded joints shall be dressed on weathering contact surfaces and on exposed surfaces of all windows. Glass rebates shall be not less than 5/16" high and provide for inside glazing. Frame design shall provide for mounting insect screens between ventilators and grill. Ventilators a. Industrial Projected - Refer to projected windows. b. Casement Vents - Refer to casement windows. c. Horizontally Pivoted - Ventilators shall be pivoted nominally 2" above their centers. They shall have locking devices as required by project specifications. Hinges shall be butt or pivot type. Ventilators shall have cam handles, push bars, or chain control devices for individual operation per manufacturer's standard in steel, iron or die cast metal. Chains shall operate on pulleys, guide brackets, or idlers and be provided with slips or cleats to hold ventilators open in any desired position. Mullions Refer to Accessories © 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.   SPECIFICATIONS: HOT ROLLED LINKS WINDOWS FROM HOT-ROLLED SECTIONS COMPARISON CHART FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-OUT AND SIDE HUNG-IN FIRE RATED - FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-OUT AND SIDE HUNG-IN INDUSTRIAL - FIXED, PROJECT-IN, PROJECT-OUT, SIDE HUNG-OUT AND SIDE HUNG-IN DOORS - SWING-IN AND SWING-OUT