Browse
  • APPENDIXC: Guidelines for the Wind Retrofit of Existing Buildings

    CHAPTERC1
    GABLE END RETROFIT FOR HIGH-WIND AREAS

    The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.

    SECTIONC101
    GENERAL

    [BS]C101.1 Purpose.

    This chapter provides prescriptive methods for partial structural retrofit of an existing building to increase its resistance to out-of-plane wind loads. It is intended for voluntary use and for reference by mitigation programs. The provisions of this chapter do not necessarily satisfy requirements for new construction. Unless specifically cited, the provisions of this chapter do not necessarily satisfy requirements for structural improvements triggered by addition, alteration, repair, change of occupancy, building relocation or other circumstances.

    [BS]C101.2 Eligible buildings and gable end walls.

    The provisions of this chapter are applicable only to buildings that meet the following eligibility requirements:

    1. 1.The building is not more than three stories tall, from adjacent grade to the bottom plate of each gable end wall being retrofitted with this chapter.

    2. 2.The building is classified as Occupancy Group R3 or is within the scope of the International Residential Code.

    3. 3.The structure includes one or more wood-framed gable end walls, either conventionally framed or metal-plate-connected.

    In addition, the provisions of this chapter are applicable only to gable end walls that meet the following eligibility requirements:

    1. 4.Each gable end wall has or shall be provided with studs or vertical webs spaced 24 inches (610 mm) on center maximum.

    2. 5.Each gable end wall has a maximum height of 16 feet (4877 mm).

    [BS]C101.3 Compliance.

    Eligible gable end walls in eligible buildings may be retrofitted with this chapter. All other modifications required for conformance with this chapter shall be designed and constructed in accordance with the International Building Code or International Residential Code provisions for new construction, except as specifically provided for by this chapter.