The large grate area of 50 sq ft ( 4.6 m ) would have provided adequate evaporative capacity .
The large grate area of 50 sq ft ( 4.6 m ) would would also have been a challenge for the fireman .
The large grate area of 50 sq ft ( 4.6 m ) would have provided adequate evaporative capacity , but would also have been a challenge for the fireman .