Section 4 Bulwarks and Guardrails

401. General

All exposed parts of upper deck and superstructure or similar deck of deckhouses are to be pro- vided with effective bulwarks or guardrails.

402. Scantlings

The height of bulwarks or guardrails specified in 401. is not to be less than 1 m . However, where this height would interfere with the normal operation of the dredger, the height may be reduced under the approval of this Society.

403. Construction

1. The bulwark is to be of rigid structure in accordance with its height and the upper edge of bul- warks are to be effectively stiffened. The thickness of bulwark plating on upper deck is not to be less than 6 mm .

2. The bulwark is to be provided with strong stays at the position of deck beams and the space of stays on upper deck is to be less than 1.8 m .