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under this platform and fastened to the 8 in. by 8 in. posts are six boxes of 600-1b. capacity each, with a spout and gate control. Three of these salt boxes are located on each side of the platform, and they are spaced 28 ft. apart; salt is taken from them as the cars are being filled with crushed ice. The filling of these boxes is done from the crushed ice platform above, the salt being brought from the storage bin in the crushed ice room in carts.
Ice is delivered to a platform adjoining the manufacturing plant by means of conveyors owned and operated by the ice company. The ice is then elevated by means of an endless chain cross-bar conveyor, elevating at an angle of about 48 degrees. The ice then moves by gravity across the tracks on slides, supported on trusses, and passes into the crusher house. By means of a trap door, the ice is then either diverted into the crusher house for crushing, or on to a retarding gravity slide connecting with the chain conveyor on the cake ice platform below.
The machinery for operating the inclined elevating conveyor is located in a housing at the top of the conveyor. The trusses across the tracks, and 5 ft. apart, span 44 ft. and are clear 24 ft. above top of rail. These trusses also support a footway connecting the crusher house and ice manufacturing plant. The gravity slides where curved or exposed to severe abrasion are metal lined. The ice runs on the platform are made of oak. The conveyors and elevator are electrically operated. The plant is lighted by electricity and can be operated with the same efficiency at night as in the day
FLOORS FOR RAILWAY BUILDINGS
A. CRABLE, Chairman;
G. A. MITCHELL,
The Sub-Committee to which this subject was assigned submits a report to cover the results of its preliminary investigations. This report is somewhat elementary in character and is intended to serve as a basis for more advanced research, which it is hoped the Sub-Committee will have opportunity to follow out next year. In the continued study of this subject it is desired to develop dependable information on the wearing qualities of the various types of foors, under actual working conditions, and to study specific cases of failure in an effort to determine if such failure was caused by inherent defects in the floor structure, by defective workmanship or by the selection of the wrong type of floor for a given installation.
FLOORS FOR RAILWAY BUILDINGS The floor of any building, in which work is performed, is subjected to service much more severe than any other part of the building and may be considered as a part of the working equipment as well as a part of the structure. Therefore, any treatment of the subject of floors, as applied to railway buildings, logically follows a consideration of the different kinds of buildings in which floors of different types can be used most successfully.
In the following paragraphs an attempt is made, based upon what appears to be accepted practice, to indicate the types of foors commonly used in various railway buildings. Freight Houses.
Probably the most common type of foor in use is the two-inch plank floor, laid on wooden joists or stringers. This floor is satisfactory and economical, except in locations of considerably more than minor importance, and is suitable for all frame buildings supported on posts or piers. In many cases, where wooden floors have become worn, the wearing surface in front of doors and on runways is renewed with not less than 78-in. dressed maple, square edged and end matched, laid on top of the original floor. Results show maple flooring so used to have a life of twenty years or more, even under heavy service, but on account of the expense involved its use is generally limited to that part of a floor which is subjected to heavy trucking.
In larger and more important freight houses, at terminals, and where a large amount of trucking is done, a floor of greater first cost is justified and in such locations concrete appears to give satisfactory results. Such a floor is fairly permanent, sanitary, easy to keep clean, and the type of construction used fits in well with the building foundation. Its disadvantages are failure of the wearing surface, especially at expansion joints, and an unyielding surface which occasionally produces complaints from truckers. Expansion joints should be as few as possible and located outside of the heavily used surface wherever practical.
In locations where concrete floors are for any reason not considered satisfactory, some different type of wearing surface, such as wood or asphalt blocks or asphalt mastic, may be laid on a concrete foundation. This type of construction adds materially to the first cost. Transfer Platforms.
If of wooden construction, floors on transfer platforms should be laid with the planking parallel to the line of trucking traffic, unless iron plates are used for a trucking runway, when they may be laid at right angles if the construction of the sub-structure requires. However, when plates are used repairs can be made much more easily if planks are laid longitudinally.
Where trucking traffic is not too heavy concrete floors are in some cases used, and for extremely heavy traffic a concrete base with wood or asphalt block or mastic wearing surface is used. Freight Storage Houses.
For freight storage houses, which are usually of fireproof construction, concrete floors are generally approved. Freight Piers.
Floors on freight piers must of necessity largely conform to the style of construction used in the pier. They should be fire-resisting and in many cases must have flexibility enough to take up the vibration caused by boats being moved along the pier. Engine Houses.
For minor houses, where not many running repairs are made, especially houses of frame construction, a floor of clean engine cinders, well compacted, is sufficient to meet all requirements.
For houses of more importance concrete or brick give excellent results.
For houses of a still higher grade, a floor of brick or creosoted wood block on a concrete base is recommended.
Asphalt floors, either mastic or block, are not recommended for engine houses since the action of steam and oil is likely to cause their failure. Blacksmith Shops.
Cinder floors are preferred in all cases. Machine Shops.
In small frame buildings a wood plank floor, of thickness to correspond with severity of service it has to withstand, is commonly accepted as good practice.
For buildings of a higher grade, wood block foors, preferably of treated material, give excellent results. Asphalt blocks or mastic produce an excellent floor, but in some cases have not been found entirely satisfactory because of the detrimental effect of oil drippings around machines, and in locomotive shops.
Concrete floors have in some cases been found to be undesirable because they lack the resiliency and dryness necessary for the comfort and health of men employed constantly in shop buildings, and tools or finished machine parts are frequently damaged by falling on them. Where concrete floors are used it is found that workmen frequently provide themselves with wooden platforms to work upon. These are objectionable as dirt collectors, they get oil soaked and produce a fire hazard.
Concrete floors have been found to be satisfactory in erecting shops. Paint Shops.
In passenger car paint shops a concrete floor seems to meet all requirements satisfactorily and it is doubtful if circumstances would justify the use of a more expensive type of floor. In freight car shops, where paint is sprayed on, a floor of cinders is suitable.
The use of concrete floors in paint shops or any other shop where tracks run into the building makes it necessary to provide a permanent type of track construction so as to avoid frequent damage to the floors when making track repairs. Freight Car Repair Shops.
Wood floors can be used if something better than cinders is desired and if provision has to be made for trucking material between tracks, but if material is handled by overhead cranes cinders will produce a very satisfactory floor. Store Houses.
Concrete floors are satisfactory and are in common use, but for locations where very heavy material is handled wood block is to be preferred.
In small store houses, at outlying points, the ordinary wood plank floor meets all requirements. Oil Houses.
Because of the necessity for fireproof construction concrete is the only flooring suitable for oil houses. Carpenter Shops.
In carpenter shops where considerable bench work is done wood plank floors are desirable because of the comfort to workmen which they afford.
Concrete floors in such buildings are easily kept clean and for this reason are sometimes used.