| 1/00 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) |
| 1/02 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) Crowns; Roofs |
| 1/04 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) characterised by the form of the bricks or blocks used |
| 1/06 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) characterised by the form of the bricks or blocks used Composite bricks or blocks |
| 1/08 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) characterised by the form of the bricks or blocks used Composite bricks or blocks Bricks or blocks with internal reinforcement or metal backing |
| 1/10 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) Monolithic linings; Supports therefor |
| 1/12 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) incorporating cooling arrangements (constructions of tube assemblies in general F28) |
| 1/14 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) Supports for linings (F27D 1/1 takes precedence) |
| 1/16 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) Making or repairing linings |
| 1/18 | Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00) Door frames; Doors, lids, removable covers |
| 3/00 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) |
| 3/02 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Skids or tracks for heavy objects |
| 3/04 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Ram or pusher apparatus |
| 3/06 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Charging or discharging machines on travelling carriages |
| 3/08 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Screw feeders; Screw dischargers |
| 3/10 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Charging directly from hoppers or shoots |
| 3/12 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Travelling or movable supports or containers for the charge |
| 3/14 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Charging or discharging liquid or molten material |
| 3/15 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Tapping equipment; Equipment for removing slag |
| 3/16 | Charging; Discharging; Manipulation of charge (conveying systems characterised by their application for specified purposes not otherwise provided for B65G 49/00; moving charge through a furnace F27B 9/14) Introducing a fluid jet or current into the charge (F27D 3/18 takes precedence) |