Large-Volume Space : An uncompartmented space, generally two or more stories in height, within which smoke from a fire either in the space or in a communicating space can move and accumulate without restriction
NFPA 92B Standard for Smoke Management Systems in Malls, Atria, and Large Spaces, 2009 ed. http://catalog.nfpa.org/NFPA-92B-Standard-for-Smok e-Management-Systems-in-Malls-Atria-and-Large-Spac es-Prior-Years-P4285.aspx, (Std: Smoke Mgt Sys in Malls, Atria, and Large Spaces - Amer) {239 NFC}