Ordinance 842 - Laserfiche WebLink

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and is constructed with flood resistant materials; and 3) the owner uses it solely for parking of vehicles, building access or storage. The above -noted alternative elevation methods are subject to the following additional standards: (1) Design and Certification: A licensed professional engineer or architect must certify that the structure's design and as -built condition meets the general design standards of the Minnesota State Building Code. Specifically, all electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities must be at or above the regulatory flood protection elevation or be designed and constructed to prevent flood water from entering or accumulating in these components during times of flooding. (2) Specific Standards for Above grade, Enclosed Areas: Owners and contractors shall design and construct above grade, fully enclosed areas such as crawl spaces or tuck under garages to internally flood with design and construction plans that stipulate: 9 April 29, 2010 (a) A minimum area of automatic openings in the walls where internal flooding is to be used as a flood proofing technique. There shall be a minimum of two openings on at least two sides of the structure and the bottom of all openings shall be no higher than one -foot above grade. The automatic openings shall have a minimum net area of not less than one square inch for every square foot of enclosed area subject to flooding unless a licensed professional engineer or architect certifies that a smaller net area would suffice. The owner or contractor may equip the automatic openings with screens, louvers, valves, or other coverings or devices if such devices permit the automatic entry and exit of flood waters without any form of human intervention; and (b) That the enclosed area will be designed and constructed of flood resistant materials in accordance with the standards of the FP -3 or FP -4 classifications in the Minnesota State Building Code and that the owner or occupants shall only use such areas for building access, vehicle parking or storage. b. Basements, as defined by Section 1301.02, Subd. 8, b. of this Chapter, shall be subject to the following requirements: (1) The City does not permit residential basement construction below the regulatory flood protection elevation. (2) The City may permit non residential basements below the regulatory flood protection elevation provided the basement is structurally dry flood proofed according to the standards listed in Section 1301.05, Subd. 4 c (below) of this Chapter. c. All areas of non residential structures (including basements) that would be below the regulatory flood protection elevation shall be flood proofed to meet the structurally dry flood proofing classifications in the Minnesota State Building Code. Structurally dry flood proofing must meet the FP -1 or FP -2 flood proofing classification in the Minnesota State Building Code. This flood proofing shall require making the structure watertight with the walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. The City does not allow structures in the flood fringe that the owners have flood proofed to the FP -3 or FP -4 classification in the Minnesota State Building Code. The City does not allow residential structures in the flood fringe that the owners have dry -flood proofed to the FP -1 or FP -2 flood proofing classification in the Minnesota State Building Code.