Louis Liston Tallyn

“ Freight houses should probably not be more than two hundred feet wide, since otherwise freight taken directly from the cars to the vessels must be trucked too far. On the other hand, where package conveyors are used, this would matter little; and the wide 5warehouse would have greater floor space for the same cost of construction. If a large amount of freight is loaded direct from the cars to the vessels, it may be well to run a track between the freight house and the pier; but at most docks, unless space is very valuable, such freight will be handled at a pier independent of the warehouse. ”

“ I have decided to present the design of a steel railroad warehouse at New Orleans for the Illinois Central Railroad as I am greatly interested in railroad work and intend to make that my speciality and because the design of warehouses has so far received only little consideration, but chiefly because a careful study of such a subject will give a knowledge of steel structural work. ”

“ With a steel structure a settlement of a couple of inches would not in the least impair its efficiency, as the members would adjust themselves by flexure to meet the new condition. This property of a steel structure is of great advantage where the foundations must be located in soil saturated more or less 3with water, as would be the case near the sea or a large river. Where brick or stonework is built on such foundations, the masonry would be quite likely to crack. ”

“ PRINCIPLES APPLICABLE IN THE DESIGN OF RAILROAD WAREHOUSES Nearly all railroad warehouses are of wood, 2but if a warehouse were to be built today it is certain that, except for small buildings and in localities where timber is exceptionally cheap, a wooden warehouse would not be considered. ”

“ At present steel seems to be the material which most nearly approaches the ideal for such structures. This use of steel is due to the increase in the cost of timber and to the decrease in the price of structural steel, which now makes it possible to build a much stronger, a better looking, and more economical structure than would have been possible ten years ago. ”

“ It is claimed that tin or iron when used on a building near salt water, deteriorate rapidly and that a gravel roof would be much better; but if the iron or tin is kept well 4painted, there is little danger of its being attacked in that way. ”

“ The girders will run parallel to the length of the building and therefore the girders will be 20 ft. long and the joists 15. The economic length of the girder is somewhat less than 20 ft. but by this spacing of the columns more clear room will be obtained, which is a thing worthy of some consideration.
Roof Trusses. The vertical load on the roof will be taken as 35 lbs. per. sq. ft. of horizontal projection, of which 20 lbs. is supposed to cover the weight of the roof itself, and 15 a possible load due to wind. The horizontal effect of the wind is taken as 30 lbs. per. sq. ft. ”

“ A better design is to omit the floor over the track-pit, which reduces the storage space, but also secures an abundance of light and ventilation for the lower story as well as avoids a costly 7girder construction over the track-pit. ”