1609.1.2 Protection of openings.
BC § 1609.1.2
In wind-borne debris regions, glazing in buildings shall be impact resistant or protected with an impact-resistant covering meeting the requirements of an approved impact-resistant standard or ASTM E 1996 and ASTM E 1886 referenced herein as follows: 1. Glazed openings located within 30 feet (9144 mm) of grade shall meet the requirements of the large missile test of ASTM E 1996.
2.Glazed openings located more than 30 feet (9144 mm) above grade shall meet the provisions of the small missile test of ASTM E 1996. Exceptions: 1. Wood structural panels with a minimum thickness of 7/16 inch (11.1 mm) and maximum panel span of 8 feet (2438.4 mm) shall be permitted for opening protection in buildings with a mean roof height of 33 feet (10 058 mm) or less that are classified as a Group R-3 or R-4 occupancy. Panels shall be precut so that they shall be attached to the framing surrounding the opening containing the product with the glazed opening. Panels shall be predrilled as required for the anchorage method and shall be secured with the attachment hardware provided. Attachments shall be designed to resist the components and cladding loads determined in accordance with the provisions of ASCE 7, with corrosion-resistant attachment hardware provided and anchors permanently installed on the building. Attachment in accordance with Table 1609.1.2 of this code with corrosion-resistant attachment hardware provided and anchors permanently installed on the building is permitted for buildings with a mean roof height of 45 feet (13 716 mm) or less where V asd determined in accordance with Section 1609.3.1 of this code does not exceed 140 mph (63 m/s).
3.Glazing in Risk Category III or IV buildings located over 60 feet (18 288 mm) above the ground. Table 1609.1.2Wind-Borne Debris Protection Fastening Schedule for Wood Structural Panels a, b, c, d Fastener TypeFastener Spacing (inches)Panel Span ≤ 4 feet4 feet < PanelSpan ≤ 6 feet6 feet < PanelSpan ≤ 8 feetNo. 8 wood-screw-based anchor with 2-inch embedment length16108No. 10 wood-screw-based anchor with 2-inch embedment length161291/4-inch diameter lag-screw-based anchor with 2-inch embedment length161616 For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound = 4.448 N, 1 mile per hour = 0.447 m/s. a. This table is based on 140 mph wind speeds and a 45-foot mean roof height. b. Fasteners shall be installed at opposing ends of the wood structural panel. Fasteners shall be located a minimum of 1 inch from the edge of the panel. c. Anchors shall penetrate through the exterior wall covering with an embedment length of 2 inches minimum into the building frame. Fasteners shall be located a minimum of 2 1/2 inches from the edge of concrete block or concrete. d. Where panels are attached to masonry or masonry/stucco, they shall be attached using vibration-resistant anchors having a minimum ultimate withdrawal capacity of 1,500 pounds.
