A Treatise On The Principles And Practice Of Dock Engineering

SHEDS AT HAVRE AND MARSEILLES. 395 boarding. It is worthy of mention that, with a single coat of tar per annum, this covering has remained intact for more than twenty-five years. It is, however, very inflammable, and, taken in conjunction with the fact that there is an open void of some 10 feet between the shed floor and the ground, these sheds must be considered constructed in such a manner as to be highly combustible. In fact, one of them was totally burnt in 1889. The reconstruction was carried out entirely in brickwork and iron. The latest sheds at this port have a width of 131 feet and a length of 367 feet 6 inches. The gable walls and the division wall between the two compartments into which the sheds are divided are of brick, but the remaining sides and the roof are of corrugated iron. The wood floor rests directly on the sand. There are platforms 13 feet in width at the front and 4 feet in width at the back. The roof truss is of the bow- string type, in three spans supported by columns in lattice-work. Sheds at Havre.* On the north quay of the Bellot Basin there are three sheds, each 147 feet 6 inches wide, exclusive of overhang, with lengths of 255 feet, 457 feet, and 306 feet respectively. On the south quay of the same dock the sheds (fig. 378) are 180 feet wide and 262 feet, 525 feet, and 590 feet long Fig. 378. —Shed at Havre. respectively. In each case they are separated by open spaces of 130 feet.. These spaces are intended not only for the purpose of isolating conflagra- tions, but also in order to accommodate cumbersome merchandise, and to permit of trucking from the dock quays without the necessity of passing through the sheds. These last have metallic frames, roof coverings of zinc sheets, and external walls of brickwork. The roofs are in two spans each, of 73 feet 9 inches and 90 feet respectively. The total height of the north sheds is 38 feet and of the south sheds 41 feet. There are continuous doors along the quay front of a uniform height of 15 feet 6 inches in both cases. Sheds at Marseiiles.! The double-storey shed illustrated in fig. 379 has a roof in one span of 78 feet 9 inches, the ridge of which is 43 feet above ground-floor level. The * Despres on “ The Plant of Maritime Commercial Ports of France,” Proc. Am. Soc. C.E., vol. xxx. + Ibid.