The present invention is directed to novel polypeptides and to nucleic acid molecules encoding those polypeptides. The inflatable support structure includes a web of inflatable channels for rapid deployment from a folded configuration to an inflated configuration in which the fire-resistant material partially envelops a structure. Moreover, the suction head is unrotatably secured onto the floor nozzle, and forms an air communication with the floor nozzle. Side walls 31 are provided at the opposite ends in an arrangement direction of the engaging portions 26A, 26B and projecting forward from the main body 21 in a connecting direction with the mating connector 50.