Certified Heavy Crane Lifts & Rigging Engineering
Certified heavy crane lifts and rigging engineering — PE-sealed critical lift plans, crane selection, rigging design, and field execution for vessels, exchangers, boilers, and heavy industrial equipment.
PE-Certified Critical Lift Plans
Grey Engineering Enterprises provides certified critical lift plans sealed by a licensed Professional Engineer — the engineering document required by OSHA 1926.1431 and ASME B30.5 for lifts exceeding 75% of crane rated capacity, multiple crane lifts, and lifts over energized power lines or occupied structures. Our lift plans include crane selection and positioning, load radius calculations, rigging configuration, ground bearing pressure analysis, and step-by-step lift procedures.
Crane Selection & Ground Bearing Analysis
Selecting the right crane and confirming the ground can support it are the two most critical decisions in any heavy lift. We perform ground bearing pressure calculations for crane outrigger loads, specify crane mats and cribbing, and select crane models based on load weight, lift radius, boom configuration, and site constraints. Our engineers have planned lifts in congested operating plants where space, overhead obstructions, and live plant operations demand precise engineering.
Field Execution by Experienced Engineers
Our PE-led team is present at the lift — not just on paper. We supervise rigging attachment, verify sling angles and hardware ratings, confirm crane setup against the lift plan, and provide real-time engineering judgment during the lift. This field presence is what separates a certified lift from a certified accident waiting to happen. We have set pressure vessels, heat exchangers, boilers, and structural steel inside operating facilities across the United States.
Common questions about Heavy Crane Lifts
What is a critical lift plan and when is it required?
A critical lift plan is a detailed engineering document required by OSHA 29 CFR 1926.1431 and ASME B30.5 for lifts that exceed 75% of the crane's rated capacity, involve multiple cranes, or are performed over energized power lines or occupied structures. The plan must be prepared and signed by a qualified person, and for the most demanding lifts, sealed by a licensed Professional Engineer. Grey Engineering produces PE-sealed critical lift plans that satisfy OSHA, ASME, and owner requirements.
What does a PE-certified lift plan include?
A PE-certified lift plan includes: load weight and center of gravity determination, crane selection and rated capacity at the required radius, boom configuration and counterweight specification, rigging configuration including sling type, length, and angle, ground bearing pressure calculations for outrigger loads, crane mat and cribbing specifications, lift radius and clearance diagrams, and step-by-step lift procedures. Grey Engineering seals all critical lift plans with a licensed Professional Engineer's stamp.
Can Grey Engineering execute lifts inside operating industrial plants?
Yes. Executing heavy lifts inside congested, operating industrial plants is a core competency of Grey Engineering Enterprises. We have set pressure vessels, heat exchangers, boilers, and structural steel inside operating facilities where overhead obstructions, live piping, and active plant operations require precise engineering and careful execution. Our PE-led team is present at every critical lift to supervise rigging, crane setup, and lift execution.
What is the difference between a standard lift and a critical lift?
A standard lift is any routine crane operation within the crane's rated capacity and standard operating conditions. A critical lift is defined by OSHA and ASME B30.5 as a lift that exceeds 75% of the crane's rated capacity, involves multiple cranes working in tandem, or is performed over energized power lines, occupied structures, or in other high-consequence situations. Critical lifts require a formal written lift plan, additional pre-lift inspections, and in many cases a PE-sealed engineering document. Grey Engineering handles both standard and critical lift planning and execution.