Sangjin Development Co., Ltd., has always been in the forefront in the supply of gratings and engineering service for oil field, refinery, marine industries and industrial plants as well as civil areas worldwide since its incorporation in 1970. Sangin's principal business segments are; 　* flooring & civil grating 　* hot dip galvanizing 　* hot rolled steel bar 　* grating production plant implementation 　* other road safety equipment as like sound proof noise barrier and guard rail Sangjin's mission is to be recognized as the best quality grating supplier in the world with its modern facilities and equipments, long experience, profound expertise and customer-oriented workforce. Sangjin's accreditation to ISO 9002 in 1998, ISO 9001 (scope of registration : manufacturing of steel grating, hot dip galvanizing) in 2000, KS D 8308 (hot dip galvanizing) in 1997, Certificate of Grating Quality and Delivery in 1999, Certificate of Sound Transmission Loss (sound proof noise barrier) in 2001 is the testimony of its dedication in being the best unique source for customers.