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// CODE SNIPPET

1609.2 Protection of Openings

Building Code 2018 of Illinois > 16 Structural Design > 1609 Wind Loads > 1609.2 Protection of Openings
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In windborne 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 E1996 and ASTM E1886 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 E1996.
  2. Glazed openings located more than 30 feet (9144 mm) above grade shall meet the provisions of the small missile test of ASTM E1996.
Exceptions:
  1. Wood structural panels with a minimum thickness of 7/16 inch (11.1 mm) and maximum panel span of 8 feet (2438 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 1609.2 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 Vasd determined in accordance with Section 1609.3.1 does not exceed 140 mph (63 m/s).
  2. Glazing in Risk Category I buildings, including greenhouses that are occupied for growing plants on a production or research basis, without public access shall be permitted to be unprotected.
  3. Glazing in Risk Category II, III or IV buildings located over 60 feet (18 288 mm) above the ground and over 30 feet (9144 mm) above aggregate surface roofs located within 1,500 feet (458 m) of the building shall be permitted to be unprotected.
TABLE 1609.2
WINDBORNE DEBRIS PROTECTION FASTENING SCHEDULE FOR WOOD STRUCTURAL PANELSa, b, c, d
FASTENER TYPEFASTENER SPACING (inches)
Panel Span
≤ 4 feet
4 feet < Panel
Span ≤ 6 feet
6 feet < Panel
≤ Span 8 feet
No. 8 wood-screw-based anchor with 2-inch embedment length16108
No. 10 wood-screw-based anchor with 2-inch embedment length16129
1/4-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.
  1. This table is based on 140 mph wind speeds and a 45-foot mean roof height.
  2. Fasteners shall be installed at opposing ends of the wood structural panel. Fasteners shall be located not less than 1 inch from the edge of the panel.
  3. Anchors shall penetrate through the exterior wall covering with an embedment length of 2 inches minimum into the building frame. Fasteners shall be located not less than 21/2 inches from the edge of concrete block or concrete.
  4. 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.

1609.2.1 Louvers

Louvers protecting intake and exhaust ventilation ducts not assumed to be open that are located within 30 feet (9144 mm) of grade shall meet the requirements of AMCA 540.

1609.2.2 Application of ASTM E1996

The text of Section 6.2.2 of ASTM E1996 shall be substituted as follows:
6.2.2 Unless otherwise specified, select the wind zone based on the basic design wind speed, V, as follows:
6.2.2.1 Wind Zone 1—130 mph ≤ basic design wind speed, V < 140 mph.
6.2.2.2 Wind Zone 2—140 mph ≤ basic design wind speed, V < 150 mph at greater than one mile (1.6 km) from the coastline. The coastline shall be measured from the mean high water mark.
6.2.2.3 Wind Zone 3—150 mph (58 m/s) ≤ basic design wind speed, V ≤ 160 mph (63 m/s), or 140 mph (54 m/s) ≤ basic design wind speed, V ≤ 160 mph (63 m/s) and within one mile (1.6 km) of the coastline. The coastline shall be measured from the mean high water mark.
6.2.2.4 Wind Zone 4— basic design wind speed, V > 160 mph (63 m/s).

1609.2.3 Garage Doors

Garage door glazed opening protection for windborne debris shall meet the requirements of an approved impact-resisting standard or ANSI/DASMA 115.

Related Code Sections


1609.2 Structural Design, Protection of Openings
) and maximum panel span of 8 feet (2438 mm) shall be permitted for opening protection in buildings with a mean roof height of 33 feet (10 058 mm ...
Building Code 2021 of Illinois > 16 Structural Design > 1609 Wind Loads > 1609.2 Protection of Openings
1609.2 Structural Design, Protection of Openings
(11.1 mm) and maximum panel span of 8 feet (2438 mm) shall be permitted for opening protection in buildings with a mean roof height of 33 feet (10 058 ...
Building Code 2018 of Illinois > 16 Structural Design > 1609 Wind Loads > 1609.2 Protection of Openings
705.8.2 Fire and Smoke Protection Features, Protected Openings
Where openings are required to be protected, opening protectives shall comply with Section 716. Exception: Opening protectives are not required ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 705 Exterior Walls > 705.8 Openings > 705.8.2 Protected Openings
705.8.2 Fire and Smoke Protection Features, Protected Openings
Where openings are required to be protected, opening protectives shall comply with Section 716. Exception: Opening protectives ...
Building Code 2021 of Illinois > 7 Fire and Smoke Protection Features > 705 Exterior Walls > 705.8 Openings > 705.8.2 Protected Openings
408.5 Special Detailed Requirements Based on Occupancy and Use, Protection of Vertical Openings
Any vertical opening shall be protected by a shaft enclosure in accordance with Section 713, or shall be in accordance with Section 408.5.1 ...
Building Code 2021 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 408 Group I-3 > 408.5 Protection of Vertical Openings
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