Object 4 : Stationary Object: Any object, device, or appliance that is not fastened but that is not readily moved from one place to another in normal use, for example, a refrigerator
NFPA 901 Standard Classifications for Incident Reporting and Fire Protection Data, 2001 ed. https://www.nfpa.org/assets/files/AboutTheCodes/90 1/901-F2005-ROP.pdf (Std: Class for Incid Reporting and Fr Prot Data - Amer) {355 NFC}