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OSHA Trench Safety: Soil Classification, Sloping, and Excavation Requirements
OSHA 1926.652 trench protection requirements. Soil type classification, slope ratios, protective systems, competent person duties, and excavation volume calculations.
Excavator Production Rates: Bucket Fill, Cycle Time, and Fleet Sizing
How to estimate excavator production in cubic yards per hour. Fill factors, swell factors, cycle time optimization, and matching truck fleets to excavator output.
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NFPA 13 sprinkler hydraulic calculator. Compute flow using K-factor, Hazen-Williams friction loss in piping, and total system demand at the riser with hose stream allowance.