[Added 10-27-1980 by L.L. No. 11-1980]
Air-supported structures may be erected inside or outside of the fire limits, provided that they are not more than one story high above the ground or above a roof that meets the requirements for Class I Fireproof Structures, § 86-13A. The type of occupancy in an air-supported structure shall be for recreational purposes only, and then only as approved by the Superintendent with the concurrence of the Village Board.
A. 
No air-supported structure shall be erected closer than 20 feet to any interior lot line nor closer than 30 feet in any direction to an unprotected opening, required exterior stairway or corridor or required exit door on the same level or above the level of the air-supported structure. An air-supported structure may abut another building on the same lot if there are no unprotected openings or exits above or within 30 feet as above stipulated, if there is no door between them that is a required exit and if the exterior wall separating them meets the requirements of Class 1 Fireproof Structures.
B. 
Requirements for separation from other buildings on the site may be waived by the Superintendent where an air-supported structure is used for on-site temporary shelter for construction work or incidental fabrication of construction elements to be used on the site of construction.
The ground enclosed by an air-supported structure and the ground for a distance of at least 10 feet outside of same shall be cleared and maintained clear of all combustible material or vegetation. No open flame of any kind shall be employed within the structure or closer than 20 feet to any part of the enclosure fabric. Smoking is prohibited within the structure and within 20 feet thereof. Fire-extinguishing facilities shall be provided in accordance with § 86-125.
Notwithstanding any other requirements of this code, travel distance to an exit from any point within an air-supported structure shall not exceed 75 feet. Exit doors in air-supported structures shall close automatically against normal operational pressures. Opening force at the edge of such doors shall not exceed 15 pounds with the structure at operational pressure. Exit doors shall be located in frames so constructed that they will remain operative and support the weight of the structure in a state of total collapse.
A. 
Air-supported structures shall be anchored to the ground or supporting structure by either ballast or positive anchorage sufficiently and evenly distributed and adequate to resist the inflation lift load, the aerodynamic lift load and the drag (shear, load due to wind impact). The latter factors shall be based on a sustained wind velocity of at least 70 miles per hour, gusts to 80 miles per hour and an estimated stagnation of not less than 0.5 q for structures on grade whose height is equal to or less than the width of the structure. For greater heights or for elevated structures, increased anchorage shall be provided, justified by analytical and/or experimental data.
B. 
The skin of the structure shall be of such strength and the joints so constructed as to provide a minimum dead-load strip tensile strength at 70 of four times the seventy-miles-per-hour design load (inflation and aerodynamic loading). The joints shall provide a dead-load strip tensile strength at 160° F. of twice the seventy-miles-per-hour design load (i.e., a factor of safety of four and two respectively). In addition, the material shall provide a trapezoidal tear strength of at least 15% of the maximum design tensile load. Material and joint strength shall be so certified by the manufacturer, justified by analytical and/or experimental data.
All fabrics that are used in air-supported structures shall meet all requirements of NFPA Code No. 701, utilizing the small scale test.
A. 
Air-supported structures shall be inflated and shall remain inflated during all periods of occupancy to a minimum differential pressure of 0.88 inch and a maximum differential pressure of 1.50 inches of water. Ventilation flow per occupant, either through vents or anticipated leakage, shall comply with the requirements of Article VI of this code.
B. 
Where the net floor area per occupant is 150 square feet or less, the structure shall be provided with at least two blowers, each of which shall have adequate capacity to maintain the required inflation pressure. Also, an auxiliary engine-generator set capable of powering one blower or a supplementary blower powered by an internal combustion engine, either of which shall have the capacity to run continuously for four hours, shall be located outside the structure, shall be weather-protected and shall be arranged to automatically operate the blower within 20 seconds upon failure of the normal source. Heat shall be provided from a source outside the structure so arranged as to prevent the spread of fire to the structure. The temperature within the air-supported structure shall be maintained at not less than 50° F.
C. 
The air-supported structure shall be equipped with a fail-safe alarm system. An exit alarm is to sound when the inside air pressure nears atmospheric pressure and when there is a sharp drop in inside air pressure as might occur through a large tear or hole in the fabric. Prior to utilizing the air-supported structure and issuance of a certificate of occupancy, the alarm system is to be tested in the presence of the Superintendent or his representative and shall meet his approval.
Certificates of occupancy for air-supported structures shall be issued for a period not exceeding one year, and such certificate may be renewed for one-year periods thereafter if the air-supported structure complies with all laws, codes, rules and regulations in effect at the time of the request for renewal. The fee for a certificate of occupancy for an air-supported structure shall be as elsewhere specified in this code for a temporary certificate of occupancy, and the fee shall also be due each time that a request is made for renewal.