Calculation Framework Site Benchmark Mode Quick Slope & Drop Mode
True Slope = ((High Invert − Low Invert) / Total Run) × 100 —%
Total Drop / Fall —
Laying Direction Upstream (Low to High) Downstream (High to Low) Pipe & Material
Pipe Material Library Custom (manual wall & length) 4" SDR-35 PVC (Wall: 0.01' | Length: 14') 6" SDR-35 PVC (Wall: 0.02' | Length: 14') 8" SDR-35 PVC (Wall: 0.02' | Length: 14') 10" SDR-35 PVC (Wall: 0.03' | Length: 14') 12" SDR-35 PVC (Wall: 0.03' | Length: 14') 15" SDR-35 PVC (Wall: 0.04' | Length: 14') 4" DR-18 C900 (Wall: 0.02' | Length: 20') 6" DR-18 C900 (Wall: 0.03' | Length: 20') 8" DR-18 C900 (Wall: 0.04' | Length: 20') 10" DR-18 C900 (Wall: 0.05' | Length: 20') 12" DR-18 C900 (Wall: 0.06' | Length: 20') 12" Corrugated HDPE (Wall: 0.06' | Length: 20') 15" Corrugated HDPE (Wall: 0.07' | Length: 20') 18" Corrugated HDPE (Wall: 0.08' | Length: 20') 24" Corrugated HDPE (Wall: 0.10' | Length: 20') 30" Corrugated HDPE (Wall: 0.11' | Length: 20') 36" Corrugated HDPE (Wall: 0.13' | Length: 20') 12" RCP Concrete (Wall: 0.17' | Length: 8') 15" RCP Concrete (Wall: 0.19' | Length: 8') 18" RCP Concrete (Wall: 0.21' | Length: 8') 24" RCP Concrete (Wall: 0.25' | Length: 8') 30" RCP Concrete (Wall: 0.29' | Length: 8') 36" RCP Concrete (Wall: 0.33' | Length: 8') 48" RCP Concrete (Wall: 0.42' | Length: 8') 4" Ductile Iron (Cement-Lined) (Wall: 0.03' | Length: 20') 6" Ductile Iron (Cement-Lined) (Wall: 0.04' | Length: 20') 8" Ductile Iron (Cement-Lined) (Wall: 0.04' | Length: 20') 10" Ductile Iron (Cement-Lined) (Wall: 0.04' | Length: 20') 12" Ductile Iron (Cement-Lined) (Wall: 0.05' | Length: 20') 16" Ductile Iron (Cement-Lined) (Wall: 0.05' | Length: 20') Include Mid-Pipe Checks (L/2)Extra station halfway along each pipe
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Height of Instrument Setup FEET · DECIMAL Height of Instrument
HI = Benchmark + Rod Reading —ft
Free trial: 10 of 10 free runs left
/ 0–? ft3 columns
Engineering Tenths (.00) Inches / Fractions (1/8")
Tap 🔒 LOCK RUN to generate the grade sheet
Elevations in feet IMPORTANT FIELD DISCLAIMER: Trench Master is a field estimation tool designed strictly to assist with calculations. Users must manually verify all physical grade elevations, laser alignments, and invert measurements with a calibrated engineering level prior to placing bedding stone or laying pipe. The developer assumes zero liability for construction layout errors, structural defects, re-excavation costs, or field installation mistakes resulting from the use of this software.
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