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 efficiency—carries 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