USS PENSACOLA 64 2 ½ # PLATE STEEL INBOARD OPERATING ROOM BULKHEAD LOOKING TO PORT SHOWING INTERMITTENT WELDING AT HEEL OF STIFFENING FLANGE OF BULKHEAD PLATING FASTENINGS OF ELECTRIC LEADS ETC AND PART OF DOOR FRAM AND DOOR (SAME LOCATION AS PREVIOUS PICTURE EXCEPT OTHER SIDE OF BULKHEAD DUE TO COSTLY TEMPORARY STIFFENING NECESSARY TO PREVENT WARPING DURING WELDING OTHER 2 ½ # BULKHEADS WERE RIVETED USING TAR FELT BETWEEN SURFACES FOR AIRTIGHTNESS