furnace

I'm very interested in the things "down below" I just can' find a full description on the Kilroy's stoking indicators used on Titanic. English is not my native language, so technical English is a bit hard. Hope you understand. Example. Boiler room with two stokeholds and doubled ended boilers...

Hi everyone, first post here! I was wondering if anyone knew what the dimensions of the furnaces were in the boilers? Been looking for a long time but haven't found the answer. Thanks!