CRCB - California RC bridges (Chen et al. 2025)

The following models are available:

• CRCB.E1 - Era 1 (pre-1970)
• CRCB.E2 - Era 2 (1971–1990)
• CRCB.E3 - Era 3 (post-1991)
• CRCB.E123 - single-span (any era)