谁能合理解释这个句子的语法结构?

问题描述:

谁能合理解释这个句子的语法结构?
my proposal was to build a wharff there fit for us to stand upon.句子fit for us to stand upon在句子作什么成分?我在 语法书上找不到这语法点.

形容词短语作定语.例句:
He is a man responsible for his job.他是一个对工作尽责的人.