Precast Arch Units:
CON/SPAN® precast arch units are two-hinged arches with vertical legs and variable thickness haunches. They are designed using a non-linear finite element computer model that provides economy by taking soil structure interaction into account. The system currently consists of the following standard arch clear spans:
12, 14, 16, 20, 24, 28, 32, 36, 42 and 48 with rises varying from 5 to 13.
The arch advantages include:
- Structural efficiencycarries heavy loads at low stress levels
- Aesthetics of arch shape
- Curved surface sheds water and salts to increase life cycle length
- Eliminates bumps in approach pavement to bridges