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SPECIAL CONSTRUCTION permitted to be used as the roof or as a skylight on build- shall be capable of maintaining membrane structures used ings of Type IIB,III,IV and V construction,provided it is as a roof for Type I construction not less than 20 feet(6096 at least 20 feet(6096 mm) above any floor, balcony or mm)above floor or seating areas.The support system shall gallery. be capable of maintaining other membranes at least 7 feet (2134 mm) above the floor, seating area or surface of the 3102.7 Engineering design. The structure shall be designed �,ater. and constructed to sustain dead loads; loads due to tension or inflation;live loads including wind,snow or flood and seismic loads and in accordance with Chapter 16. SECTION 3103 3102.8 Inflation systems. Air-supported and air-inflated TEMPORARY STRUCTURES structures shall be provided with primary and auxiliary infla- 3103.1 General.The provisions of this section shall apply to tion systems to meet the minimum requirements of Sections structures erected for a period of less than 180 days.Tents and 3102.8.1 through 3102.8.3. other membrane structures erected for a period of less than 180 3102.81 Equipment requirements.This inflation system days shall comply with the International Fire Code. Those shall consist of one or more blowers and shall include provi- erected for a longer period of time shall comply with applicable sions for automatic control to maintain the required infla- sections of this code. tion pressures.The system shall be so designed as to prevent 3103.11 Permit required.Temporary structures that cover overpressurization of the system. an area in excess of 120 square feet (11.16 mz),including 3102.8.1.1 Auxiliary inflation system. In addition to connecting areas or spaces with a common means of egress the primary inflation system, in buildings exceeding or entrance which are used or intended to be used for the 1,500 square feet(140 m'-)in area,an auxiliary inflation gathering together of 10 or more persons, shall not be system shall be provided with sufficient capacity to erected, operated or maintained for any purpose without maintain the inflation of the structure in case of primary obtaining a pernut from the building official. system failure.The auxiliary inflation system shall oper- ate automaticaily when there is a loss of internal pressure 3103.2 Construction documents. A permit application and and when the primary blower system becomes inopera- construction documents shall be submitted for each installation tive. of a temporary structure. The construction documents shall include a site plan indicating the locarion of the temporary 3102.8.1.2 Blower equipment.Blower equipment shall structure and information delineating the means of egress and meet the following requirements: the occupant load. 1. Blowers shall be powered by continuous-rated 3103.3 Location. Temporary structures shall be located in motors at the maximum power required for any accordance with the requirements of Table 602 based on the flow condition as required by the structural design. fire-resistance rating of the exterior walls for the proposed type 2. Blowers shall be provided with inlet screens,belt of construction. guards and other protective devices as required by 3103.4 Means of egress.Temporary structures shall conform the building official to provide protection from to the means of egress requirements of Chapter 10 and shall injury. have a maximum exit access travel distance of 100 feet(30 480 3. Blowers shail be housed within a weather-protect- mm). ing structure. 4. Blowers shall be equipped with backdraft check dampers to minimize air loss when inoperative. SECTION 3104 5. Blower inlets shall be located to provide protection PEDESTRIAN WALKWAYS AND TUNNELS from air contamination.The location of inlets shall 31041 General. This section shall apply to connections be approved. between buildings such as pedestrian walkways or tunnels, 3102.8.2 Standby power.Wherever an auxiliary inflation �ocated at,above or below grade level,that are used as a means system is required, an approved standby power-generating of travel by persons.The pedestrian walkway shall not contrib- system shall be provided.The system shall be equipped with ute to the building area or the number of stories or height of a suitable means for automatically starting the generator set connected buildings. upon failure of the normal electrical service and for auto- 3104.2 Separate structures. Connected buildings shall be matic transfer and operation of all of the required electrical considered to be separate structures. functions at full power within 60 seconds of such service Exceptions: failure. Standby power shall be capable of operating inde- pendently for a minimum of 4 hours. 1. Buildings on the same lot in accordance with Section 3102.8.3 Support provisions. A system capable of sup- 503.1.2. porting the membrane in the event of deflation shall be pro- 2. For purposes of calculating the number of Type B vided for in air-supported and air-inflated structures having units required by Chapter 11, sti�ucturally connected an occupant load of 50 or more or where covering a swim- buildings and buildings with multiple wings shal]be ming pool regardless of occupant load.The support system considered one structure. 530 2006 INTERNATIONAL BUILDING CODE�