1 Scope
This European Standard deals with both large (structural) and small (non-structural
or light structural) box culverts of rectangular cross-section formed monolithically
and designed as continuous elements with a joint detail shaped to allow the possible
incorporation of sealing materials. Box culverts can be used for creation of voids
below ground for conveyance and storage of materials. e.g. conveyance and storage
of wastewater, cable tunnels and subways
For the purposes of this European Standard, box culverts having internal cross-sectional
dimensions (W and H in Figure 1) less than or equal to 1 250 mm are considered as small (non-structural or light
structural). All other units are defined as large. The elements are generally manufactured in factories using either normal weight or
lightweight concrete and usually require reinforcing steel. This standard does not
include units manufactured from autoclaved aerated concrete, nor prefabricated reinforced
box culverts of lightweight concrete with open structure.
Each unit is structurally complete. They are used in combination to form a total structure
of appropriate length (including joints) and capacity.