Box Culvert

Design Specifications
EC Box Culvert is designed according to the following design criterias:

Design Loading requirements a) MS 1293 : Part 1 : 1992 b) BD 31/87 - Buried Concrete Box type structures Reinforced Concrete design requirements a) BS 8110 : Part 1 : 1985 b) BS 5400 : Part 4 : 1984 Concrete grade : 40 N/mm2

Minimum reinforcement cover = 25mm~35mm Coefficient of earth pressure at rest = 0.5 Bulk density of soil = 19 KN/m3 EC Box Culvert comply to proof load of 112.5 KN over an area of 320mm x 320mm placed at any position on the Culvert Lid EC Box Culverts are designed to cater for surcharge load of between 0.6m to 2.0m of fill weight and 45 units of HB loading

Installation of the Box Culvert

The U-Drain/ Box Culvert should be laid on compacted sand bedding to the required level. Area where soil condition is bad, excavate deeper and replace with suitable material beneath the sand bedding, according to the engineer's design requirements for the foundation. Gap at joining area should be filled with cement mortar. Back of weepholes should be filled with suitable filter material.

Handling of the Box Culvert

Weepholes are to be utilized as lifting holes for handling and installing the U-Drain/ Box Culvert. A Lifting Beam is to be used for lifting the U-Drain/ Box Culvert to prevent excessive stress to the legs. (see Figure 2) All U-Drains/ Box Culverts are to be placed or stacked on level and firm ground at all times on site.