I have just surveyed an existing roof with long-span precast double tees (approx 60'-0" clear) with a 4'-0 width and depth of stem of 16-inches (plus an assumed 2" think flange).  The precast tables from PCI do not have these smaller size double tees.  The project is located near Philadelphia, PA.  Does anyone know a good source or have tables for similar DT construction?

Find who the supplier was. the names have changed and I do not have a close knowledge of the suppliers when the  units were supplied, most have been consolidated by international companies that are usually very good about maintaing records and a "paper trail".

Most precasters are PCI certified (80-90%), which requires records to be kept and the supplier also has information on the specific units supplied and may have done some of the engineering for the EOR for approvals.

The tables are not from PCI, but the supplier may have what you are looking for and possibly some detail suggestions.

Dick