Section 11 Dredging machinery seats and dredging gear
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 4 Ship Structures (Ship Types) - Chapter 12 Dredging and Reclamation Craft - Section 11 Dredging machinery seats and dredging gear

Section 11 Dredging machinery seats and dredging gear

Parent topic: Chapter 12 Dredging and Reclamation Craft

11.1 Dredging machinery seats

11.1.1 The seats supporting the main dredging machinery are to be at least as substantial as those required for the main propulsion machinery for dry cargo ships, see Pt 3, Ch 7, 6 Engine seatings. Continuity between the longitudinal and transverse members of main engine seats and the ship's bottom structure is to be arranged where practicable. Where floors are cut away below dredging pumps, they are to be fitted with face bars, and special care is to be taken to minimise stress-raising details and to ensure good workmanship.

11.2 Dredging gear

11.2.1 Where masts or derrick posts support dredging gear which will be subjected to vibration or other dynamic loads in addition to its true weight, this must be taken into account in the calculations. The dynamic multiplier should be taken between two and three according to the type of machinery and gear used.

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