Outrigger Bearing — Over Buried Services
Pad pressure vs allowable bearing on over buried services, with required mat area.
A 100 kPa pad over a shallow water main or HDPE duct bank transfers most of that pressure to the pipe crown. Statutory utility drawings lie by a metre as a habit — pothole the line, bridge it with mats spanning PERPENDICULAR, or move the pad. The cheapest lift never finds the pipe.
Formula
Note: Rigging and crane decisions are life-safety critical. This calculator is a planning aid — the load chart, sling tags, site lift plan and a qualified lift director govern every real lift.
Pad pressure vs allowable bearing on over buried services, with required mat area. A free crane load, wind & rigging safety tool — no sign-up, no upload, instant results in your browser.
About Outrigger Bearing — Over Buried Services
Outrigger Bearing — Over Buried Services computes the governing relationship P = (W_crane + W_load) × share ÷ pad area vs q_allow live as you type. A 100 kPa pad over a shallow water main or HDPE duct bank transfers most of that pressure to the pipe crown. Statutory utility drawings lie by a metre as a habit — pothole the line, bridge it with mats spanning PERPENDICULAR, or move the pad. The cheapest lift never finds the pipe. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Outrigger Bearing — Over Buried Services
- 1Enter your values — Crane weight (with counterweight), Load + rigging, Worst-case share on one pad, Pad/mat contact area and more (sensible defaults are pre-filled).
- 2Read the live results: Pad load, Bearing pressure, Mat area needed.
- 3Check the "with your numbers" line to see P = (W_crane + W_load) × share ÷ pad area vs q_allow substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Outrigger Bearing — Over Buried Services?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula P = (W_crane + W_load) × share ÷ pad area vs q_allow with authoritative sources cited on the page (OSHA 29 CFR 1926 Subpart CC — Cranes & derricks in construction; FEM 5.016 / Liebherr ground-pressure guidance)
- ✓A 100 kPa pad over a shallow water main or HDPE duct bank transfers most of that pressure to the pipe crown.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the outrigger bearing — over buried services use?+
It evaluates P = (W_crane + W_load) × share ÷ pad area vs q_allow, exactly as published. Sources: OSHA 29 CFR 1926 Subpart CC — Cranes & derricks in construction; FEM 5.016 / Liebherr ground-pressure guidance. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
A 100 kPa pad over a shallow water main or HDPE duct bank transfers most of that pressure to the pipe crown. Rigging and crane decisions are life-safety critical. This calculator is a planning aid — the load chart, sling tags, site lift plan and a qualified lift director govern every real lift.
When is this calculator the right tool for the job?+
Pad pressure vs allowable bearing on over buried services, with required mat area. A free crane load, wind & rigging safety tool. Statutory utility drawings lie by a metre as a habit — pothole the line, bridge it with mats spanning PERPENDICULAR, or move the pad. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
Related tools
- Lift Weight Buildup — Rooftop HVAC Unit
- Lift Weight Buildup — Precast Beam
- Lift Weight Buildup — Pad-Mount Transformer
- Lift Weight Buildup — Tilt-Up Panel
- Lift Weight Buildup — Standby Generator
- Lift Weight Buildup — Curtain Wall Module
- Lift Weight Buildup — Roof Truss (Paired)
- Air Velocity Check — Explosives Magazine Drift
- Roller Coverage — Intelligent Compaction (IC)
Related Manufacturing tools
Spindle Speed Calculator — Aluminum 6061
Carbide starting RPM for milling Aluminum 6061: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Mild Steel 1018
Carbide starting RPM for milling Mild Steel 1018: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Stainless 304
Carbide starting RPM for milling Stainless 304: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● Live