Try these Dayton Superior sandwich panel connectors. "M" types are commonly used.http://files.engineering.com/getfile.aspx?folder=9e4874a5-a2bc-4367-adc3-d6d528397e64&file=DOC060309.pdf
I would appreciate it if someone could provide the minimum requirements for a SAMPLE precast/ prestressed bridge beam which will be tested for a plant PCI's B4 certification. We are looking for a minimum beam length, minimum number of straight/ deflected strands and other reinforcement, etc...