I have a design-build project where I am considering using prefabricated power centers in two areas.  The design-builder has asked us to obtain additional information on using precast concrete structures versus prefabricated metal structures.  My two structures currently have interior dimensions of 30'x15' and 14'-8&quot;x21'.

1)  What are the limits of size/use for precast structures?  Your website mentions &quot;full electrical and customer supplied equipment integration&quot;--does that mean the precast building can ship with the electrical equipment already installed?  Is there a limit to how large of a structure you can build?

2)  What are the limits on shipping splits for precast (with and/or without preinstalled equipment)?