Arch Types

The BEBO Arch System consists of a series of predefined highly efficient and optimized arch shapes. The different standard spans and rises allow for the fitting into different layouts such as shallow and high grade separation applications, the accommodation of various clearance profiles for highway overpasses as well as the fulfillment of stringent flow capacity requirements for river crossings.

BEBO E-Series

Span range

3.7m (12ft) up to 25.6m (84ft)

Single Leaf Arch

For the smaller spans up to 12.8m a single arch element forms a complete arch ring. The thickness of the concrete section along the development is constant.

Twin Leaf Arch

For the larger spans from 14.6m upwards two elements form one arch ring. The thickness of the concrete section is constant except for the crown area. The connection of the two arch elements, the patented crown joint, incorporates a locally thickened section to allow for easy in-situ casting of the monolithic connection (no formwork required).

Overfill Heights

The standard range of overfill above the arch crown is 0.6m (minimum) to 5.0m (maximum). Some BEBO E-Series arches can handle higher overfill heights. Such non-standard applications are designed on a project-by-project basis by the BEBO technical staff.

BEBO C-Series

Span range

9.1m (30ft) up to 16.4m (54ft)

Twin Leaf Arch

Due to the dimension of the circular-shaped arches (transportation), for all spans two arch elements form one complete arch ring. The thickness of the concrete section is constant except for the crown area. The connection of the two arch elements, the patented crown joint, incorporates a locally thickened section to allow for easy in-situ casting of the monolithic connection (no formwork required).

Overfill Heights

The standard range of overfill above the arch crown is 0.6m (minimum) to 5.0m (maximum). C-Series arches, however, can handle considerably higher overfills up to 10m and more. Such non-standard applications are designed on a project-by-project basis by the BEBO technical staff.

High Overfilled BEBO Arch - Route 126, Ohio, USA

BEBO T-Series

Span range

10m up to 30m and more

Single Leaf Arch

For the smaller spans up to 12.5m a single arch element forms a complete arch ring. The thickness of the concrete section along the development is constant.

Twin Leaf Arch

For the larger spans from 15m upwards two elements form one arch ring. The thickness of the concrete section is gradually increased towards the arch crown in order to accommodate the patented crown joint connection of the two arch elements.

Overfill Heights

The standard range of overfill above the arch crown is 0.6m (minimum) to 2.0m (maximum).

Foundations

T-Series arches require a special foundation to account for large horizontal support forces. Such foundations have to be designed on a project-by-project basis taking account of the site specific geotechnical data.

BEBO T-Series Arch - Highway 630, Canada