Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 11 Superstructure, Deckhouses and Hull Outfitting - Section 2 Bulwark and Guard Rails - 3 Guard Rails
3 Guard Rails
3.1 General
3.1.1
Where superstructures are connected by trunks, open rails are to be fitted for the whole length of the exposed parts of the freeboard deck.
3.1.2 In Type B-100 and Type A ships, open rails on the weather parts of the freeboard deck for at least half the length of the exposed parts are to be fitted.
Alternatively, freeing ports complying with ICLL are to be fitted.
3.2 Construction of guard rails
3.2.1
- Fixed, removable or hinged stanchions are to be fitted approximately 1.5 m apart.
- At least every third stanchion is to be supported by a bracket or stay.
- Removable or hinged stanchions are to be capable of being locked in the upright position.
- In the case of ships with rounded sheer strake, the stanchions are to be placed on the flat of the deck.
- In the case of ships with welded sheer strake, the stanchions are not to be attached to the sheer strake, upstand or a continuous gutter bar.
3.2.2
The size of openings, below the lowest course of rails and the deck or upstand, is to be a maximum of 230 mm. The distance between other courses is not to be greater than 380 mm.
3.2.3
Wire ropes may be accepted, in lieu of guard rails, only in special circumstances and then only in limited lengths. In such cases, they are to be made taut by means of turnbuckles.
3.2.4
Chains may be accepted, in lieu of guard rails, only where they are fitted between two fixed stanchions and/or bulwarks. if the opening is wide, the chains are to be fitted with vertical courses to prevent the horizontal courses from spreading apart.
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