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MARINE REVIEW Photo by Aerial Photographic Service Inc., Chicago. MOBILE WATERFRONT, NORTH OF THE LOUISVILLE & NASHVILLE DEPOT. THE NEW STATE DOCKS ARE BEING BUILT IMMEDIATELY ABOVE THE IMPROVE- MENTS SHOWN. THE LONG COVERED STRUCTURE IN THE BACK- GROUND MARKED X IS THE 1500-FOOT STEEL AND CONCRETE TRANSIT SHED OF THE MUNICIPAL WHARF : ling of material with the ship’s tackle to or from an open-top car, the sec- ond track will permit the handling of material to or from box cars, and the third track will be a passing track to allow switching to the last berth without stopping work on a ship in the first or second berths. This ar- rangement, while providing more ship- side tracks than usual, is necessitated by the large amount of iron, steel and timber products shipped through this SHOWING PROGRESS OF PIER NO. 2 OF THE ALABAMA STATE CRETE ARE READY FOR CONCRETE WALLS AND port, which can most advantageously be handled from car to ship, thus ma- terially reducing the handling costs. The rails for the tracks will be put in slots with the top of the rail flush with the deck. The slot will be filled except for the flange groove, in order to provide a smooth surface for hand trucking. The apron will be constructed of re- inforced concrete and will be sup- ported on concrete piles. The pile FLOORS. PHOTOGRAPH DOCKS AT MOBILE. THE CONCRETE PILES CAPPED WITH August, 1926 bents will be put on 20 feet between centers and the beams under the rails as well as the floorbeams will be of reinforced concrete. The apron structure will be 70 feet wide extending partly under the shed, that part under the shed being de- signed for a live-load of 300 pounds per square foot. At the rear of the apron a laminated creosoted sheet- piling bulkhead will extend down to a stratum of hard sand. Pier Shed Is Spacious The standard width of shed adopted is 180 feet. This width allows, should future demands require it, the as- sembling on one floor of a full cargo before arrival of the ship, or allows the unloading of a full cargo without the delay incident to loading on cars or trucks. Only ‘about 25 per cent of the cargo of outgoing ships is now of such a character as to be unloaded in a transit shed, and until conditions change, 120 feet of the transit shed will be used as shipside warehouses. Should the transit shed demands call for more of this space, other ware- houses will be built. The sheds will be of structural steel with corrugated sides. The steel trusses will be built for a span of 60 feet and will be placed on 20-foot centers. Rolling: steel doors 20 feet wide by 12 feet high will be placed in alternate bays on both the front and the rear of the sheds. In order to reduce the fire hazard, concrete fire walls will be provided to divide the shed into sections. A row of hydrants will run down the middle of each pier and standpipes with hose ¢ WAS TAKEN JUNE 1, 1926