<Table> <Tr> <Th_colspan="2"> Big Bertha </Th> </Tr> <Tr> <Td_colspan="2"> One of the first Big Berthas being readied for firing </Td> </Tr> <Tr> <Th> Type </Th> <Td> Heavy siege gun </Td> </Tr> <Tr> <Th> Place of origin </Th> <Td> German Empire </Td> </Tr> <Tr> <Th_colspan="2"> Service history </Th> </Tr> <Tr> <Th> Used by </Th> <Td> Austro - Hungarian Empire German Empire </Td> </Tr> <Tr> <Th> Wars </Th> <Td> <P> World War I </P> World War II </Td> </Tr> <Tr> <Th_colspan="2"> Production history </Th> </Tr> <Tr> <Th> Manufacturer </Th> <Td> Krupp </Td> </Tr> <Tr> <Th> No. built </Th> <Td> 12 </Td> </Tr> <Tr> <Th_colspan="2"> Specifications </Th> </Tr> <Tr> <Th> Weight </Th> <Td> 47 tn (94,000 lb) </Td> </Tr> <Tr> <Th> Length </Th> <Td> 5.88 m (19.3 ft) </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Shell </Th> <Td> HE; 820 kg (1,807 lbs) </Td> </Tr> <Tr> <Th> Elevation </Th> <Td> + 40 ° to + 75 ° </Td> </Tr> <Tr> <Th> Traverse </Th> <Td> 4 ° </Td> </Tr> <Tr> <Th> Muzzle velocity </Th> <Td> 400 m / s (1,312 ft / s) </Td> </Tr> <Tr> <Th> Effective firing range </Th> <Td> 12.5 km (7.8 mi) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Big Bertha </Th> </Tr>

The largest canon in the world big bertha weighed how much