Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 3 Ship Structures (General) - Chapter 6 Machinery Spaces - Section 1 General

Section 1 General

Parent topic: Chapter 6 Machinery Spaces

1.1 Application

1.1.1 This Chapter applies to all ship types detailed in Pt 4 Ship Structures (Ship Types), with propulsion machinery and/or auxiliary machinery situated in a machinery space. Only the requirements particular to machinery spaces, including protected machinery casings and engine seatings, are given. For other scantlings and arrangement requirements, see Pt 3, Ch 5 Fore End and Aft End Structure and the relevant Chapter in Pt 4 Ship Structures (Ship Types) for the particular ship type concerned.

1.2 Structural configuration and continuity

1.2.1 The Rules provide for both longitudinal and transverse framing systems or a combination of both.

1.2.2 Where a machinery space is situated aft, and longitudinal bulkheads terminate at or in the machinery space, suitable taper brackets are to be provided at the ends of the bulkheads. Suitable scarfing arrangements are to be provided where a longitudinal framing system terminates at or in the machinery space.

1.2.3 Where a machinery space is situated amidships and the shell and deck outside the line of openings are longitudinally framed, this system of framing is also to be adopted in the machinery space. Longitudinal bulkheads, if fitted, are generally to be carried through the machinery space. Where structure which contributes to the main longitudinal strength of the ship is discontinued in way of a machinery space, suitable compensation and scarfing arrangements are to be provided.

1.3 Symbols and definitions

1.3.1 The following symbols and definitions are applicable to this Chapter unless otherwise stated:

L, B, D, T are as defined in Pt 3, Ch 1, 6.1 Principal particulars

s = spacing, of secondary stiffeners, i.e. frames or beams, in metres
t = thickness of plating, in mm
I = inertia of stiffening member, in cm4, see Pt 3, Ch 3, 3.2 Geometric properties of section
S = spacing or mean spacing of primary members, in metres
Z = section modulus of stiffening member, in cm3, see Pt 3, Ch 3, 3.2 Geometric properties of section.
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