【法规名称】
【法规编号】 61512 什么是编号？
【正 文】
第9页 CAP 369C MERCHANT SHIPPING (INSTRUCTIONS TO SURVEYORS) (PASSENGER SHIPS) REGULATIONS
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[接上页] (2) Boundary Angles: These may be single and shall be at least .1 inch thicker than the bulkhead plating required by the Table. (3) Stiffeners: (a) These shall be in accordance with Table 1 or Table 2, Appendix II, in association with a spacing of 30 inches. Other forms of stiffener may be adopted if they provide not less strength and stiffness than those tabulated, and the spacing of stiffeners may be increased up to a maximum of 36 inches, provided they be correspondingly increased in strength and stiffness. The lower end of each stiffener is to be attached to the shell plating, to the inner bottom plating or to efficient horizontal plating.(b) At each deck level which forms the top of a system of stiffeners, plating is to be provided of a character which win ensure horizontal rigidity in the bulkhead. (c) In the case of hold stiffeners connected to the inner bottom plating the lower bracket or its connecting angle shall extend over the floor adjacent to the bulkhead; the upper bracket is to be connected to angles which extend over the beam space, or other effective means shall be adopted for securing the necessary structural rigidity at these parts. (d) Where stiffeners are cut in way of watertight doors in the lower part of a bulkhead, the opening is to be suitably framed and bracketed, and a tapered web plate or buttress, stiffened on its edge, is to be fitted at each side of the door from the base of the bulkhead to well above the door opening. Where stiffeners are not cut, but where the space between stiffeners has to be increased on account of watertight doors in 'tween deck bulkheads, the stiffeners at the sides of the doorway shall be increased in depth and strength. In all cases where stiffeners are cut, or are widely spaced, the efficiency shall be at least equal to that of the unpierced bulkhead, without taking the door-frames into consideration. The frames of watertight doors are to be well fitted and strongly connected to the bulkhead.(4) Riveting: (a) The rivets in seams, and connections of plating and boundary bars of bulkheads shall be spaced not more than 4 1/2 diameters centre to centre, except on the shell flange of boundary angles where they may be 5 diameters centre to centre. (b) Where the distance below the bulkhead deck is more than 35 feet, the boundary angles shall be double riveted in both flanges, and the vertical connection of plates shall also be double riveted. (c) The rivets connecting stiffeners to bulkhead plating shall be spaced not more than seven diameters centre to centre, and in the case of stiffeners having no bracket attachment, they shall be spaced four diameters for 15 per cent of their length each end.(5) Collision Bulkhead: The scantlings, both of plates and stiffeners shall not be less than are required for ordinary transverse bulkheads having stiffeners at 30 inch spacing, but the spacing of the stiffeners is not to exceed 24 inches. Where this bulkhead extends above the bulkhead deck as required by paragraph 14, the extension is to have the same scantlings as an ordinary upper 'tween deck watertight bulkhead, and is to be made weathertight. Cap 369C reg 19 Watertight longitudinal bulkheads All provisions relating to main transverse watertight bulkheads shall, so far as is practicable, apply to watertight longitudinal bulkheads. They shall be equal in strength, stiffness and efficiency to transverse bulkheads of the same depth and shall be constructed in a similar manner. Cap 369C reg 20 Watertight decks, steps and flats (1) Plating: The horizontal plating shall be at least 04 inch thicker than required for bulkheads at corresponding levels. (2) Beams: These shall be of the sizes given for stiffeners in Table 2, Appendix II, in association with a spacing of 30 inches, except where beams are fitted in short lengths bracketed at each end when they may be based on Table 1. The "length" (长度) to be used with the Tables is to be the greatest distance between the points of support (when the beams are bracketed at one end the length for Table 2 may be reduced by the width of the bracket) and the "height" (高度) is to be the distance from the bulkhead deck to the watertight deck or flat minus half the "length". (3) Where frames pass through a watertight deck or step, watertightness is to be maintained by means of caulked angle chocks or by cast iron or cast steel chocks efficiently secured or rust jointed. (4) The necessary supports to the beams are to be provided by bulkheads or by efficient girders pillared as required, care being taken that the rivet connections of the pillars are sufficient to withstand the load due to water pressure. The distance between the lines of support is not to exceed about 15 feet. Cap 369C reg 21 Watertight recesses These shall be so constructed as to provide strength and stiffness at all parts not less than as required for watertight bulkheads and flats. Cap 369C reg 22 Watertight ventilators and trunks (1) Watertight ventilators and watertight trunks fitted for ventilation or other purposes shall be carried at least up to the margin line, and shall be of the same strength as watertight bulkheads at corresponding levels. |
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