www.RitchiesOffshoreServices Crane Calculation Template Stage 1: Gross Load Calculation Stage 2: Crane Utilization Stage 3: Crane Selection Template Stage 4: Crane Matt Calculation Template Stage 5: Actual Bearing Pressure under Selected Mat Stage 6 Actual Bearing Pressure under Selected Mat Net Load = 5,500 Kg + Accessories = 100 Kg Hook Block = 500 Kg + Stored Fly Jib if Used = N/A Kg Gross Load = 6,100 Kg Gross Load X 100 Divided by SWL @ the Radius Worked: % (Maximum75%) Counterweight Used 16 t Boom Length Used 38.2 m Length & Angle if Fly Jib Used N/A m deg Maximum Radius Used 18 m SWL at Radius Used 8.5 t Maximum Radius at Boom Length Used 10 m Outrigger Spread 7000 mm X 8171 mm Rigged Weight of Crane Plus Ballast 64 t X0.75% 48 t + Gross Load 54.1 t Divided by Ground Bearing Allowance 10 t /m² Minimum Area of Mat Required 5.41 m² Actual Area of Mat Size Used 6.25 m² Matt Size or Diameter if Circular 2500mm X 2500mm Resulting Loading: Maximum Point Loading 54.1 t Divided by the Actual Area of Mat to be Used 6.25 t Resulting Pressure 8.7 t Or resulting Pressure from Crane Programme t /m² Ground Surface i.e Solid, Gravel etc. Mud, Peat, March 0 t /m² Cohesive Ground Soft 4 t /m² Cohesive Ground Firm: This Figure to be used Unless the Exact Measurement is known (Civil Engineers Report) 10 t /m² Paving, concrete Plinths, Heavy Duty Roads 50 t /m² Ground Load Bearing Capability Known t /m²
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Crane - Load Calculation Template - Ritchies Offshore … Template Stage 5: Actual Bearing Pressure under Selected Mat Stage 6 Actual Bearing Pressure under Selected Mat Net Load =
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