EN 14844:2006+A2:2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions, symbols and
  abbreviated terms
4 Requirements
5 Test methods
6 Evaluation of conformity
7 Marking
8 Technical documentation
Annex A (informative) - Additional information
        for the design of box culverts
Annex B (normative) - Verification by calculation
        aided by physical testing
Annex C (informative) - Installation
Annex ZA (informative) - Clauses of this European
         Standard addressing the provisions of
         the EU Construction Products Directive
Bibliography

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 subwaysFor 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.