| Applications
By
using a range of auxillary equipment such as bollards, fenders,
spuds etc. the flexibility of the Janson couple pontoons can
be further enhanced. The following examples demonstrate the
versatility of this system which allows it to be used for
virtually any marine task.
Transportation
The pontoons
are assembled into practically any configuration to provide
temporary or permanent large capacity ferries. The ferries
may be winched on fixed cables or self-propelled units with
narrow draft and high manoeuvrability.
Marine
Civil Engineering
Almost
any civil engineering task undertaken on land can be made
to work on water using the Janson couple pontoons. For grabbing
and general lifting work, heavy duty cranes are mounted on
simple rafts made up of spud-supported coupling pontoons.
In pile driving, the pontoons can be assembled creating a
U-shape, within which the pile-driving hammer works. Suitable
spuds are installed at the relevant flange points and provide
complete stability to support revolving loads.
Similar configurations are adopted for dredging assemblies.
These permit most types of dredging to be carried out using
conventional excavating equipment.
Bridging
Another
application of the coupling pontoons is to create floating
supports for multiple span bridges. Instead of driving numerous
piles for temporary intermediate supports for bridges, pontoons
can be assembled and anchored, to provide a flexible , but
also stable support for bridges.
| Main
dimensions |
:
length 6000 mm |
| |
:
width 2400 mm |
| |
:
height 1600 mm |
| Weight
per unit |
:
3875 kg |
| Water
plane area |
:13.6
sq.m. |
| Carrying
capacity |
:13.6
kg per mm draught |
| Empty
draught |
:
285 mm |
| Water
plane moments of inertia |
:
lx=36.1 m4 |
| |
:
ly= 5.8 m4 |
| Allowable
deck loading |
:
20 kN/sq.m. |

| Couplings
per set |
|
| Weight |
:
50 kg |
| Allowable
tension |
:
250 kN |
| Allowable
shear |
:
100 kN |
| Allowable
bending |
:
330 kNm combined with 100 kN shear |
|