Marine Transportation Articles

Designing a closed chock as per IACS rules

Introduction   Chocks are used universally for mooring and towing operations on ships. For towing operations, Chocks are used for guiding the towing rope from the winch through the outer shell of the vessel to the tug. For mooring operations, the chock is used to...

The Optim22 Method of Weight Optimization of Framed Steel Structures

1      Abstract A semi-automated structural weight optimization system is presented for framed structures of post and beam construction which is based on basic structural member design principles.   The approach is to adjust member properties in a manner that...

How to identify the spoolpiece lifting points?

In the offshore construction industry, the connection between the newly installed pipeline and the riser is accomplished via a series of ‘spoolpieces’ (or spools). The spool is fabricated by welding pipe joints to form an L-shaped, Z-shaped, or possibly a straight...

Sea Pressure Loads Calculation based on DNV Rules

Introduction   Sea pressure loads are an important factor in the structural design of a vessel. What is sea pressure load? As the term suggests, it is the external pressure on the vessel due to the surrounding sea. What kind of pressure it is, and how to...