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Sand Trench Calculator

Calculate utility trench bedding sand cradle, pipe haunching, and protective sand envelope subtracting pipe volume displacement.

Trench Sand Quantities

Real-Time
Net Sand Volume
0.00 yd³
0 CFT
Sand Weight (Tons)
0.00 tons
0 tonnes
Pipe Displacement
0.00 CFT
Subtracted pipe volume
Bulk 50 lb Bags
0 Bags
If pre-bagged
Visual Engineering

Utility Trench Cradle & Protective Cover

Utility pipe cradle bedding and protective envelope volume subtracting pipe displacement.

PIPE 12" COVER + 4" BEDDING TRENCH MATH • Trench Vol = L × W × Bedding Depth • Pipe Vol = π × (OD/2)² × L • Net Sand = Trench Vol - Pipe Vol • Standard Cover: 12" (300mm) top

Utility Trench Cradle & Protective Cover

Utility pipe cradle bedding and protective envelope volume subtracting pipe displacement.

Mathematical Theory

Engineering Calculations & Formulas

Mathematical formulas and engineering constants powering this calculator.

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Trench Gross Volume

Total rectangular prism volume of the bedding and protective envelope zone.

Gross Vol = Length × Width × (Bedding + Pipe OD + Cover)
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Pipe Displacement Subtraction

Deducts cylindrical volume occupied by the drainage or conduit pipe.

Pipe Vol = π × (Outer Diam / 2)² × Trench Length
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Net Sand Required

Exact volume of sand backfill needed around the pipe cradle.

Net Sand = (Gross Vol - Pipe Vol) × 1.10 (Compaction)