offshore container

1. OFFSHORE VS FREIGHT CONTAINER Prepared by Badaruddin

2. DEFINITION AS PER CODE
IMO – CSC 1972; Freight container are designed to cover the forces on containers
ecountered in general marine transport, loading and unloading in ports and inland
transport.
IMO – MSC/Circ. 613; Offshore container is portable unit, specially designed for repeated
use in the transport of goods or equipment handled in open sea to, from and between fixed
and or floating installation and ships..

3. COMPARISON
Description Freight Container Offshore Container
Code References ISO 1496 / CSC EN 12079/DNV 2.7
Designed Load  2R
 No Impact load
 2.5R for the primary structure and 3R for
the pad eyes.
 The horizontal and vertical impact load
are calculated, accellaration makx 0.2g.
Sling force direction Sling force applied vertically
(exclude 1D or 1DX)
The sling force applied in angle to 45 degree.
Internal force on container wall 0.6 P g 0.6 P g
Minimum material thickness
for corner post & bottom rails.
In general t=3 mm t=6 mm for R>1 ton
t = 4 mm for R<1 ton

4. COMPARISON
Description Freight Container Offshore Container
Lifting Point Types ISO Corner Fitting Pad Eyes
Testing Scheme  Load Test equal to 2R without
accellaration (no Impact).
 4 points lifting
 2 points lifting
 Vertical impact test; Drop test.
Major modification shall be conducted to change freight container to offshore container. Replace the
iso corner fitting only to pad eyes is not automatically change the freight to offshore container.