Crane Assisted Rigging Removal

Crane Assisted Rigging and removal (CARR) 3-Day Course

This course is for professionals who have primary roles in arboricultural tree removal that utilize cranes and rigging to safely perform their jobs. It is designed for climbers and ground workers, and their various roles and responsibilities on jobsites. Through our CARR course, participants will learn the safe use of mobile cranes when used on an arboricultural worksite. Emphasis on current OSHA and ANSI regulations will be taught throughout the class.

Education, coaching, and practical hands-on experience using compound rigging strategies and setting safe and proper rigging to balance pieces will be explained and demonstrated. Additionally, safe setup of the crane and all required safety measures such as proper outrigger placement, understanding load charts and lifting angles, estimating green log, tree-part weights, and proper cuts to use when working with a crane will also be explained and demonstrated.

Location: Boalsburg, PA
Dates: July 26-28, 2021
Course Times: 7:30am – 4:00pm EST on scheduled course dates; includes a 30-minute lunch break.
Cost: $749 (course registration closes on 7/13/2021). Cost includes use of facilities with lunch provided, as well as all course materials, instructor resources and certificate package. Participants are responsible for their own travel, lodging arrangements, and PPE gear.

Class Size: This course is limited to 24 participants.

Who Should Attend

Professionals who have a primary role in arboricultural tree removal that utilizes cranes and rigging to safely perform their job. This course is designed for both climbers and groundworkers and their various roles and responsibilities on the jobsite.

Safety and Risk Management

  • Integrated risk assessment, tree dynamics and prescribed work risk
  • Emergency action plan and stop work protocols
  • Crane limitations and crane dynamics
  • Determining the effect of weather for continued operations

Working with Cranes, Qualified Crane Operators, and Qualified Arborists

  • Proper crane selection, load bearing, and stability
  • Compliance with CCR Title 8 §3427 Safe working procedures as it pertains to hoisting personnel
  • Safe crane setup, proper outrigger cribbing, and matting
  • Worksite layout, establishing a work zone, and a drop zone
  • Crane operation, load charts and LMAP’s, and lifting capacity
  • Crane operator and climber aloft, communications
  • Qualified crane operator’s responsibilities while hoisting and maintaining a qualified arborist aloft
  • Proper load management during and following the cutting process
  • Anchoring methods and techniques to secure climber to the crane
  • Anchoring systems and techniques to secure climber to tree spur climbing and choking lanyard systems, and safe tie-ins
  • Sit harnesses, lanyards, connectors, knots, slings, chokers, and shackles

Tree Physics and Load Dynamics

  • Estimating green wood and tree part weights
  • Dynamic load vectors, angles of incidence, force, mass, and physics
  • Reactive forces and system load analysis and interpretation
  • Tree dynamics, system dynamics, force management

Lines, Slings, and Rope tools

  • Line selection, care, and maintenance
  • Elasticity, tensile strengths, bend radius, working load, factor of safety
  • Proper sling selection
  • Slings types, constructions, and limitations
  • Compliant interface, terminations, and attachments

Knots, Hitches, Prussics, and Terminology

  • Bight, bend, loop, turn and round turn, tail, lead, fall, standing parts, working and running end
  • Rigging knots and hitches; figure 8, slip knot, cow hitch, timber hitch, running bowline, half hitch, clove hitch, single/double sheet bend, girth hitch, English prussics, French prussics kleimheist, and krutzelkleim

Compound Rigging Techniques and Planning

  • Work planning, teamwork, communication, and accountability
  • Identifying Compression and Tension zones in wood fiber when picking with a crane
  • Safe tree cutting techniques when working with a crane, bore/plunge cut, mismatch, directional notch, lift notch, v-notch, cut straight through
  • Rigging systems, balancing, lifting, and managing tight drop zones
  • Rigging equipment setup, stowage, and operation

Equipment Requirements

Participants are required to bring personal protective equipment, including:
  • Arborist or forestry helmet
  • Hearing protection (muffs or plugs)
  • Eye protection (ANSI Z87)
  • Face screen
  • Work gloves
  • High viz vest/jacket/outerwear (ANSI Class 2 or equivalent)
  • ASTM F1897 (2014) UL approved chainsaw protective pants or chaps (NON-UL labeled chaps or pants will not be allowed)
  • Approved work boots (ANSI or CE approved)
  • Pen and paper
  • Clothing appropriate for outdoor weather conditions (our courses run rain or shine; long pants – not shorts)


Attendees who complete the course will receive a NATS-issued Crane Assisted Rigging and Removal Certificate of Completion (valid for 12 months) for this course.

Continuing Education Units

This course has been submitted for ISA Certified Arborist and TCIA CTSP Continuing Education Units (CEUs).

Applicable Standards

This course meets the ANSI / ASSE Z490.1 Criteria for Accepted Practices in Safety, Health, and Environmental Training as well as OSHA 1910.180 and 1910.184, ASME 30.5 and 30.9, and ANSI Z133.

Age of Majority

Each participant must be over the age of majority in the state in which the course is being held.

Lodging Options

Participants are responsible for making their own lodging arrangements. This course’s facility offers limited primitive camping (no shower facility available) which is first come, first serve. Please indicate below if you are interested in more information on this camping option.

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