Express Locomotive Boiler, with a widened fire-box (Great Northern Railway, England). The grate area is 30.9 sq. ft. and the heating surface 2500 sq. ft. The barrel is 5 ft. 6 in. diameter, 16 ft. long between tube plates. The fire-box crown is stayed by vertical stays extending to the shell crown, except for the three rows of stays nearest the tube plates. These are supported by cross girders resting upon brackets secured to the outer shell.
Source: 1911 EB, Vol. 4, Page 144
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