This paper, presents a postprocessor subprogram for design of the tubular joints in ISO-19902 code. The subprogram was developed using Mat Lab and Net-Beans Java platform. Although the current design software provides extensive structural design checks, complementary analysis are, in some cases, necessary. Therefore, this subprogram is intended aid the engineers conduct complementary checks efficiently. Comparison of results showed that the unity check ratios obtained by using the post-processor, were consistently lower than SACS' joint can post processor. This paper also presents the design provision for the tubular joint of fixed offshore steel jacket platforms. © 2012 IEEE.