BS Maritime works – Part 3: Code of practice for the design of shipyards and sea locks. BS Code of Practice for Maritime Structures – Part 3: Design of Dry Docks, Locks, Slipways and Shipbuilding Berths, Shiplifts and Dock and Lock Gates. stru ctu res. Simo n. B u rch ett. BS and the Eurocodes. Simon Burchett. Associate Director. 1. Dealing with Waves and Coastal Structures.
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The concrete should be at least grade 40 and Reinforced concrete gates should be designed with the face itself should be cast against a machined reinforcement cover preferably of 75 mm but in no steel shutter to give an accurate, smooth face.
In this case, the width should be measured between the bottoms of the battered sides at the tangent points of the curves.
The undocking operation after repair hs the reverse of the docking operation. In addition a small crane, main dock sump screens and should either be monorail hoist or mobile gantry, should bz provided positioned to be visible and accessible for hand for maintenance of the smaller pumps.
A drained floor is normally cheaper than a gravity or tied down structure. As an alternative, an with 25 mm to 30 mm clearance between bars.
As such, conformity with its recommendations is not obligatory and variations from its recommendations may well be justified in special circumstances and engineering judgement should be applied to determine when the recommendations of the code should be followed and when they should not. Advantage may be taken of this to produce a gravity Depending on the ground conditions, the following design. Under these circumstances it is usual to combine the duties of fire and ballast pumps and to ensure that the capacity of the firewater jockey pumps is adequate to cover any low flow ballast water requirements without starting the main ballast pumps.
In the past, other materials structure; have been used notably brickwork built to form permanent shuttering to support in situ concrete d density of soil which may be used to resist which was often combined with stone facing for uplift; stepped altars and copes.
The gate advantages and disadvantages of flap gates.
It is essential to ensure an adequate depth of water at the lock entrances see 2. Depending upon the size of the shiplift and 5. This The filling time for a dry dock is normally expressed arrangement produces a smoother flow into the dock as the time taken to fill the dock with the outside with less tendency to cause tipping of the keel and water be at MHWS without a ship in dock and is bilge blocks.
Regulations, with Amendment Low voltage supplies will normally be terminated on Regulations The entry to the dock sump should be protected with In appropriate bss, there may be some suitable grids or screens to prevent large debris advantage in arranging the discharge from one or entering the intakes and damaging the pumps.
Code of practice for materials BS Consideration should be given to the b hydraulic 634-93 or hoists operating wire possibility of excessive siltation if it is necessary to ropes or chains; form a pocket in an otherwise flat natural sea bed. These pumps drive soleplate to be used. Location of the intakes near the entrance layer of gravel or no-fines concrete and by allowing from the dock normally presents the simplest and ground water under excess pressure to discharge cheapest solution.
Compressed air is bow thruster can be used to swing a hinged floating transmitted to the tanks through flexible hoses gate. Hardwood timber blocks have been widely used in many docks and are still considered acceptable for 2.
Gs other shipyards, only pedestrian access may be needed across the gate. They should normally be built in 2. Small ballast tanks, located above sea In some shipyards, vehicular access across the top of level, are discharged by gravity when the gate is the gate is a feature essential to the operational required to float and refilled by pumping.
Precautions have to be taken to avoid the Lock walls should be designed to carry safely all discharge water undermining the entrance works 6439-3 to which they are subjected, including those structure. The possibility of this design assumed.
The final choice of gate is a matter of judgement 6.
BS Maritime works. Code of practice for the design of shipyards and sea locks
Attempts should be made where possible required. On the not less than two independent means of supply from dockside, a simple fused or circuit breaker the main switchboard and the location and wiring of controlled supply should be provided. Summary of pages This document comprises a front cover, an inside front cover, pages i to x, pages 1 to 74, an inside back cover and a back cover.
This rubber capping pieces tends to distribute the load structure also forms the foundation for the hoists and prevent a high concentrated load from and is subjected to the MDL as the ship is developing. They may include the following.
Having reached land the cradles are flexible and it can be shown by vessel may be further transferred both calculation that a higher value is appropriate. The floors of under-drained docks supported directly on the subsoil should be analysed for loading in accordance with 2. In addition to the usual shipbuilding services, the provision of lighting, Shipbuilding docks may also be equipped with jib heating, ventilation and additional fire precautions cranes which are usually arranged to operate should be considered.
To close, the gate 4 operation may require careful monitoring of moves across the entrance under the action of a pumps and water levels; winch operating an endless chain or wire rope. There is therefore no direct relationship tonnes per metre which can be distributed along the between the length of a shiplift and the length of centre line of the platform for which the structure bd ship able to use it.
It should be weak soil is present at the subfloor level.