BIL 044 Draft 02 2020-2022 - Laserfiche WebLink

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(11) Subsection R301.2.1.2, "Protection of openings" of the International Residential Code is amended to read as follows: "R301.2.1.2 Protection of openings. Exterior glazing in buildings located in windborne debris regions shall be protected from windborne debris. Glazed opening protection for windborne debris shall meet the requirements of the Large Missile Test of ASTM E1996 and ASTM E1886 as modified in Section 301.2.1.2.1. [ arage door glazed opening protection for windborne debris shall meet the requirements of an approved impact resisting standard or ANSI/DASMA 115.] [Exception] Exceptions: 1. Wood structural panels with a minimum thickness of[not less than]7/16 inch (11 mm) and a maximum panel span of[not more than] 8 feet (2438 mm) [fie] are permitted for opening protection in one- and two-story buildings classified as Group R-3 or R-4 occupancy. Panels shall be precut [and] so that they are 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 and anchors permanently installed on the building. [Attachmento shall be designed to resist the component and cladding loads determined in accordance with either Table R301.2(2)or ASCE 7, with the permanent corrosion resistant attachment hardware provided and anchors permanently installed on the building.] Attachment in accordance with Table R301.2.1.2 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 (13 728 mm) or less,where the ultimate design wind speed,V,.at'is 180 mph (290 kph) or less. 2. Glazing in accessory structures to the single family dwellings including but not limited to greenhouses and minor storage sheds. 3. Partially enclosed and open occupancy R-3 buildings shall be permitted to be designed without unprotected openings subject to the following requirements. 3.1. For each direction of wind, determination of enclosure classification shall be based on the assumption that all unprotected glazing on windward walls are openings while glazing on the remaining walls and roof are intact and are not assumed to be openings. 3.2. Partially enclosed and open occupancy R-3 buildings without wind- borne debris protection shall also include a residential safe room in accordance with Section 429, Hawaii residential safe room, of the Building Code, Chapter 5A, Hawai`i County Code, or alternatively provide an equivalently sized room structurally protected by construction complying with Section 429.5, of the Building Code, Chapter 5A, Hawai`i County Code." (12) Table R301.2.1.2, "Windborne debris protection fastening schedule for wood structural panels," of the International Residential Code is deleted in its entirety and replaced with the following: 11