What is racking in ship?
1. A distortion of the hull structure caused by a strain from a disturbed sea. 2. The deformation of the container end or side frame as a result of static and dynamic forces parallel to the deck.
What is ship Stringer?
1. A term applied to a fore-and-aft girder running along the side of a ship at the shell and also to the outboard strake of plating on any deck. 2. The side pieces of a ladder or staircase to which the treads and risers are fastened.
What is tensile stress in ship?
Tensile stress is usually the one which tries to rip apart the structure or you can say it tries to pull it. While compressive stress are reverse of it, and tends to buckle the ship. Bending stresses to bend the whole structure just like you do bend your back. Shearing forces are the ones which shears the material.
What is panting and pounding stress?
Panting stresses is an in and out motion of the plating in the bows of a ship and is caused by unequal water pressure as the bow passes through successive waves. ii. Pounding stresses is exist when ships is pitching. Ship’s bows lift clear of the water and come down heavily.
What are the 3 types of hull framing system?
There are three type of Hull framing system:
- Transverse Framing System.
- Longitudinal Framing System.
- Combined or Mixed Framing System (Hybrids framing system)
What causes sagging in a loaded vessel?
Sagging can be caused by the cargo loading pattern or when the ship is in a seaway and the bow and stern sections are supported on adjacent wave crests.
What is stealer strake?
A single wide plate which replace two narrow plates in adjacent strake of a ship. Stringer: A horizontal stiffener fitted along the ships’ side or a longitudinal bulkhead, in order to provide strength and rigidity.
What is tank top in ship?
Filters. The top of a ship’s bilge tank, usually the lowest horizontal surface on board. noun. 4. A sleeveless, slim-fitting, usually knit shirt with shoulder straps and no front opening.
Is the difference between FWD Draught and aft Draught?
The draft forward (bow) is measured in the perpendicular of the bow. The trim of a ship is the difference between the forward and aft draft. When the aft draft is greater the vessel is deemed to have a positive trim, and it has a negative trim when the forward draft is the greater.
What is the difference between panting and pounding?
Pounding: When a ship sails in heavy seas, it pitches. Panting: When waves hit the bow and stern of a ship, they create variations in pressure that tend to push the plating in and out. This is panting. The framing at the ship’s ends must be reinforced to prevent exaggerated movement of the hull plating.
How do I stop my ship from panting?
Addressing panting is an essential component of ship design. It is typically countered by reinforcing the bow and the stern with beams and stringers.
What is double bottom ship?
– ARRANGEMENT OF DOUBLE BOTTOM & FRAMING IN MACHINERY SPACE – A double bottom in a ship is a ship hull construction method where the bottom of the ship has two distinct layers of watertight hull floor where one of the outer layer forming the normal hull of the ship, and the inner layer forms a superfluous barrier to …
What kind of force is racking on a ship?
Racking could be described as a global transversal shear force trying to deflect the upper parts of the vessel in athwart direction in relation to the lower hull. The ship owner does normally prefer a design with limited transverse bulkheads in the cargo hold in order to provide easy access for the vehicles.
How is pallet racking used in a warehouse?
In industries and commercial activities, a pallet racking system is a perfect material handling storage system to store and organize product pallets in the warehouse. Although there are many varieties of pallet racking, all types allow for the storage of palletized materials in horizontal rows with multiple levels.
How tall do pallet rack uprights need to be?
Pallet Rack uprights come in various dimensions & URS keeps in stock following depth size uprights for quick ship- 24″D, 36″ D, 42″D, & 48″D. URS keeps a range of height Pallet rack uprights in stock for quick ship starting from 8ft high to 24″ high at every 2 ft increments. Capacity of uprights are given at 48″ beam spacing starting at the floor.
How does racking affect a pure car carrier?
EXECUTIVE SUMMARY For Pure Car and Truck Carriers (PCTC) the main strength problem is racking. Racking could be described as a global transversal shear force trying to deflect the upper parts of the vessel in athwart direction in relation to the lower hull.