Copyrighted by SPRINGDALE CODE & Municipal Code Corporation, 1998.

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Sec. 98-62. Wind-resistance construction specifications.

(a) Generally.

(1) Signs and sign structures shall be designed and constructed to resist wind as specified in this section. All bracing systems shall be designed and constructed to transfer lateral forces to the foundations. For signs on buildings, the dead and lateral loads shall be transmitted through the structural frame of the building to the ground in such a manner as not to overstress any of the elements thereof.

(2) The overturning moment produced from lateral forces shall in no case exceed two-thirds of the dead-load-resisting moment. Uplift due to overturning shall be adequately resisted by proper anchorage to the ground or to the structural frame of the building. The weight of earth superimposed over footings may be used in the determining of the dead-load-resisting moment. Such earth shall be carefully placed and thoroughly compacted.

(b) Windloads. For the purpose of design, wind pressure shall be taken upon the gross area of the vertical projection of all signs and sign structures at not less than 30 pounds per square foot for those portions less than 60 feet above the ground and at not less than 45 pounds per square foot for those portions more than 60 feet above the ground. In calculating wind pressure on curved surfaces, such as cylindrical or spherical signs or sign structures, this pressure shall be assumed to act on six-tenths of the projected area. In all open-frame signs or sign structures, the area used in computing wind pressure shall be 1 1/2 times the net area of the framing members exposed to the wind.

(c) Combined loads. Wind loads need not be combined in the design of signs or sign structures, only that loading producing the larger stresses need be used. Vertical design loads shall be assumed to be acting simultaneously with the wind loads.

(d) Allowable stresses. The design of steel, concrete or wood members shall conform to the requirements of Chapters 16--23 of the International Building Code. Loads, both vertical and horizontal, exerted on the soil shall not produce stresses exceeding those specified in Chapter 18, Section 1804.

(Code 1973, § 28-A-1; Ord. No. 3957, § 3, 9-26-06)

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