| gptkbp:instanceOf | gptkb:steam_locomotive 
 | 
                        
                            
                                | gptkbp:articulated | true 
 | 
                        
                            
                                | gptkbp:boilerPressure | 300 psi 
 | 
                        
                            
                                | gptkbp:class | gptkb:Union_Pacific_4000_class 
 | 
                        
                            
                                | gptkbp:designedFor | hauling freight over Wasatch Mountains 
 | 
                        
                            
                                | gptkbp:firstRun | 1941 
 | 
                        
                            
                                | gptkbp:fuelType | gptkb:coal 
 | 
                        
                            
                                | gptkbp:largestSteamLocomotive | true 
 | 
                        
                            
                                | gptkbp:length | 132 ft 
 | 
                        
                            
                                | gptkbp:locale | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:location | various museums and parks in the United States 
 | 
                        
                            
                                | gptkbp:manufacturer | gptkb:American_Locomotive_Company 
 | 
                        
                            
                                | gptkbp:maximumSpeed | 80 mph 
 | 
                        
                            
                                | gptkbp:nickname | gptkb:Big_Boy 
 | 
                        
                            
                                | gptkbp:notableEvent | No. 4014 restored and returned to operation in 2019 
 | 
                        
                            
                                | gptkbp:notableFeature | massive size 4-8-8-4 wheel arrangement
 articulated frame
 high tractive effort
 
 | 
                        
                            
                                | gptkbp:notableUnit | gptkb:No._4014 No. 4004
 No. 4005
 No. 4006
 No. 4012
 No. 4017
 No. 4018
 No. 4023
 
 | 
                        
                            
                                | gptkbp:numberOfEngines | 4 23.75 in × 32 in
 
 | 
                        
                            
                                | gptkbp:operator | gptkb:Union_Pacific_Railroad 
 | 
                        
                            
                                | gptkbp:powers | steam 
 | 
                        
                            
                                | gptkbp:preservedUnits | 8 
 | 
                        
                            
                                | gptkbp:replacedBy | diesel locomotives 
 | 
                        
                            
                                | gptkbp:restored | gptkb:No._4014 2019
 
 | 
                        
                            
                                | gptkbp:retired | 1962 
 | 
                        
                            
                                | gptkbp:totalProduced | 25 
 | 
                        
                            
                                | gptkbp:tractiveEffort | 135,375 lbf 
 | 
                        
                            
                                | gptkbp:usedUntil | early 1960s 
 | 
                        
                            
                                | gptkbp:weight | 1,250,000 lb 
 | 
                        
                            
                                | gptkbp:wheelArrangement | 4-8-8-4 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Union_Pacific_Railroad gptkb:American_Locomotive_Company
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 5 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Union Pacific Big Boy 
 |