Container port a Why is it usual practice for the cranes to

Container port.

a Why is it usual practice for the cranes to load or unload containers deposited on or removed from the wharf surface. Special machines then move the containers to or from either storage or placement on a railcar or a chassis? Two completely different reasons

b The total allowable weight of an 18 wheeler is 80K. The front axle weight is 12 K,and the typical tare weight of the whole semitrailer rig is 40 K. Containers are indexed by 20\' long TEU\'s, but intermodal containers come in both 20\' and 40\'lengths. Why?

c Why must the front axle, with only two wheels be deigned to be about 12K?

d What\'s a TOFC?

Solution

The explanation for question u asked is answered for 2 bits c and d.

c ) Limitations to axle loads are imposed to protect the road infrastructure.This is because some roads are not constructed to same strength specification. In order to retain sufficient grip on the road surface when turning ,vehicle must have sufficient mass on the front axle. This mass should not be less than 20% of the total mass on the axle of the vehicle.

d) TOFC :- Trailer On Flat Car .

TOFC was a system where goods were loaded into a semi-trailer , driven to the railyard and backed into the flatcar . When the train reached the other end another semi-tractor pulled it off the flatcar and takes it to the final destination.