Local strength check for bulk carrier based on IACS URS25

Based on the local strength requirement in IACS URS25 of maximum allowable and minimum required mass in each hold and any two adjacent holds as functions of draught in sea-going condition as well as during loading and unloading in harbour for bulk carrier,the functions for maximum allowable as well as minimum required mass in hold and draught were established according to design loading conditions for local strength requirements in IACS URS25,and hold mass curves showing the functions were plotted,and results of real ship's calculations validate their correctness.The influence on strength control for bulk carrier was studied after new requirements taking effect by real ship calculating,and some advice and solution which be useful for mariners are put forward,which aims to remind mariners controlling bulk carrier's hull strength in practice according to IACS URS25,and reduce the operation risk of bulk carrier.