In support of T.J.N.'s comment, "... spend 2 days reading it," it is very important to have a good understanding of expansion joint theory before you work on them. For example, EJ's can create very high anchor loads, they require proper guiding, etc. Be sure to get a copy of the EJMA (Expansion Joint Manufacturers Association) standards and guidelines and read everyting thoroughly.
Also, don't forget to specify the exact properties of the fluid in your spec. I know of one application installed recently in which several large-diameter EJ's began leaking within 6 months of installation because the corrosive nature of the fluid was not correctly specified.
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Ricardo