Box Culvert Designer IRC 112:2020 · IRC 6:2017

Edit inputs - Box Culvert

Enter geometry, materials, soil properties and loading. Units are shown with each field.

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Project

Identification printed on the report and drawings.

Box geometry

Cells are of equal clear span. Thicknesses in metres.

1 = single span; 2-8 = multi-cell
Ignored for single cell
0 for no haunch
Along the culvert axis
For record; analysis is square

Road, fill and levels

0 when the road runs on the slab

Foundation & protection works

Proportioned nominally for GAD and BOQ.

Railing / crash barrier

At both barrel ends, on a headwall up to road level; continued over the approach slabs.

Crash barrier only
RCC railing only
RCC railing only
RCC railing only
0 = both railings spread over barrel length; >0 = check end strip of this width

Approach slab & bracket

Approach slab top flush with top slab; one end rests on a bracket cast with the outer wall.

Along traffic
Along barrel; ≤ barrel length

Materials & detailing

Characteristic strength fck (IRC 112 Table 6.5)
HYSD bars to IS 1786; fyk used in design
Sets crack width limit (IRC 112 Table 12.1)
Diameters the design may choose from
Diameters the design may choose from

Soil & water

Winkler springs under base

Live load (IRC 6)

Vehicles are moved across the span in both directions.

Used when impact = manual
1.0 = 45°
IRC 6 cl 214.1.1.3

ULS partial factors (adverse)

IRC 6:2017 Table B.2. Relieving factors are 1.0 for permanent and 0 for variable actions.

BOQ rates

Unit rates used for the cost estimate.