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Overhead Cranes-Cab Controlled C31


Unit Standard (SAQA Reg. No 116231)

What is an overhead crane? Commonly called a bridge crane, and is a type of crane found in industrial environments.

An overhead bridge crane is a configuration of a single girder or double girder design. In simple terms, a bridge girder, or beam, is the support structure that allows the operator to move trolley and hoist from side-to-side along the bridge. The trolley is used to precisely position the hoist prior to raising or lowering a load in a safe work manner.

Cab overhead cranes is an encased setup with glass panelled flooring for operator to view the cargo from above whilst being moved.

Unlike mobile or construction cranes, Cab overhead cranes are typically used for either manufacturing or maintenance applications, where efficiency or downtime are critical factors.

Operators who are not adequately trained in the Cab controlled overhead crane operations are at great risk of injury or death. Training is a vital issue and DMR 18(11) prohibits the operation of Overhead cranes by untrained persons.

Successful candidates credited with this unit standard are able to:

  • Demonstrate knowledge of the functions of a cab controlled overhead crane
  • Identify the safety and suitability of the crane
  • Apply the recognised methods for inspecting and recording the operational fitness of all components of the crane
  • Operate a cab controlled overhead crane


  • Novice: 5 Days
  • Refresher: 1 day



Quality Assured Partner: Transport Education And Training Authority



Cab Controlled overhead Crane Learning Outcomes

Learners who master the applied competence described in this course will contribute to the development of a professional community of Civil Engineering Construction Crane Operators who are able to competently use science and technology when applying operation techniques. Demonstrating an integrated practical and theoretical grounding in Crane Operations according to safe handling and maintenance practices in compliance with crane manufacturer’s and legislated standards. The area of focus of this programme will be;

Programme Introduction

Unit Standard Information

Legislative Requirements

  • General Duties Of Employers To Their Employees
  • General Duties Of Employers And Self-Employees Persons To Persons Other Than Their Employees
  • Driven Machinery Regulations (DMR 18)
  • Managerial Responsibility

Legislation Applicable To Employees

  • General Duties Of Employees At Work

Cranes Defined


  • Jib Crane
  • Lifting Tackle

Crane Codes

Attachments & Special Operations

General View Of A Cab Controlled Overhead Crane

Principles Of Crane Operations

Principles Of Leverage

  • Levers Defined
  • Classification of Levers
  • The Law Of Moments

Data & Capacity Plates

  • Understanding The Rated lifting Capacity of Overhead Cranes

Cab Controlled Overhead Crane Components

  • Lockouts & Lockable Isolation switches
  • Interlocking Devices
  • Practical Sessions
  • Main Hook And Block
  • Auxiliary Hook Block & Hook
  • Anti-Two Block Safety Device

Below The Hook Lifting Devices

Crane Magnets

  • How A Crane Magnet Works
  • Safety Guidelines
  • Operation & Inspection Information
  • Maintenance & Handling Information
  • Actual Capacity Value
  • Important Information

Lifting Beams And Spreader Bars

  • Instructions For Use
  • Selecting The Correct Lifting Beam
  • Storing And Handling Lifting Beams

Safe Use Of Lifting Beams

  • In-Service Inspection And Maintenance
  • Other Attachments

Daily Inspection For Cab Controlled Overhead

Cranes Inspections-Pre-Start Checks

  • Personal Protective Equipment
  • Main Isolator
  • Support Beam/Structure
  • Pillars
  • Service Platform
  • Hand Railing
  • Long Travel Unit (Gantry) Structure
  • Long Travel Girder(S)
  • End Stops/Buffers
  • Long Travel Unit
  • Crab Structure
  • Crab Rails
  • Monorail Single Carrying Beam/Swing Beam
  • Joints
  • Cables
  • Cable Glands
  • Cable Brackets/Hold Down Clamps
  • Panel Box
  • Insulated Rails/Buzz Bars
  • Panel Handle
  • Earth Connection
  • Key Switch
  • Selector Switch
  • Controls
  • Hoist Drive Motor
  • Hoist Gear Box
  • Hoist Gear Box Oil Level
  • Hoist Gear Box Breathing Plugs
  • Hoist Brake
  • Over Lowering Limit Switch
  • Over Hoisting Limit Switch
  • Ultimate Limit Switch (Where Applicable)
  • Hoist Rope
  • Hoist Rope Guide
  • Rope Securing Device
  • Hoist Drum
  • Main Hoist Hook
  • Auxiliary Hoist Hook
  • Hook Block(S)
  • Safety Catches
  • Sheave Wheels
  • Cross Travel Unit
  • Cross Travel (Crab)Drive Motor
  • Cross Travel Gearbox
  • Cross Travel Gear Box Oil Level
  • Cross Travel Gearbox Oil Breathing Plugs
  • Crab Travel Gears
  • Grease Point On Pinion And Gears
  • Cross Travel Wheels
  • Cross Travel Brake
  • Cross Travel Limit Switch (Where Applicable)
  • Long Travel Unit
  • Long Travel Wheels
  • Long Travel Drive Motor
  • Long Travel Gearbox
  • Long Travel Gearbox Oil Level
  • Long Travel Gearbox Oil Breathing
  • Long Travel Brake Plugs
  • Long Travel Limit Switch (Where Applicable)
  • Weather Covers
  • Cable Reel Cable Reel Drive Motor
  • Cable Reel Drive Gearbox
  • Cable Reel Gearbox Oil Breathing Plugs
  • Cable Reel Drive Belt(S)
  • Cable Reel Drive Pulleys
  • Load Limit Device
  • General Condition Of Overhead Crane
  • No Obstruction Under Crane
  • Operator’s Cabin

Operational Checks (The Cabin)

  • Operator’s Seat
  • Hydraulic Controls

Long Travel Brake Test

Cross Travel Brake Test

Hoist Brake Test (Lowering)

Hoist Over Lowering Limit Switch Test

Hoist Over Raising Limit Switch Test

Operator’s Daily Checklist: Overhead Crane

Cab Controlled Overhead Crane Operational Procedures

Freight Handling

Duty To Inform

Identifying And Classifying Freight

  • Material Safety Data Sheets (Documentation)
  • Employer Responsibilities
  • Sections Of The MSDS’s And Their Significance

Labelling: Dangerous Goods & Substances

  • Toxic And/Or Corrosive (Combustible) Substances
  • Radioactive Material (Low To High Level Radiation
  • Flammable Liquids (Polar/Water-Miscible) Potential Hazards
  • Flammable Solids-Toxic And/Corrosive Potential Hazards
  • Substances-Spontaneously Combustible-Toxic (Air-Reactive) Potential Hazards
  • Substances-Water-Reactive (Emitting Flammable And Toxic Gasses
  • Oxidizers (Unstable) Potential Hazards
  • Organic Peroxides (Heat And Contamination Sensitive/Temperature Controlled Potential Hazards
  • Substances-Toxic (Non-Combustible) Potential Hazards
  • Infectious Substances Potential Hazards
  • Mixed Load/Unidentified Cargo Potential Hazards
  • Gases-Inert Potential Hazards
  • Gases-Flammable-Corrosive Potential Hazards
  • Gases-Oxidizing (Including Refrigerated Liquids) Potential Hazards

Labelling Symbols

  • Safety Colours And Symbols
  • Typical Signs: Examples

Rigging And Slinging

Lifting Tackle

  • Driven Machinery Regulation (DMR 18)

Determining Load Weights

  • Weight Tags
  • Waybills
  • Known Quantity
  • Test Picks

Centre Of Gravity

Location Of The Load (COG)

Estimating The Centre Of Gravity

  • Finding The COG By Using Known Weight
  • Finding The COG By Weighing The Load

Chain Slings

  • Selecting A Chain For The Job
  • Chain Slings-Types
  • Using Chains And Chain Slings Safely And Correctly
  • Chain Working Load Limits
  • Chain Inspection
  • Chain, Chain Slings, Hooks And Shackles-3 Monthly Inspection

Wire Rope Slings

  • Wire Rope Slings-Types
  • Using Wire Ropes Safely And Correctly
  • Causes Of Deterioration
  • Wire Rope Working Load Limits
  • Wire Rope Inspection
  • Calculations
  • Fibre Ropes, Steel Wire Ropes, Slings, Hook And Shackles-3 Monthly Inspection

Polyester Webbing Slings

  • Types Of Polyester Webbing Lifting Slings
  • Polyester Webbing Sling Properties
  • Selection, Safe Use And Maintenance Of Polyester Slings
  • Safe Working Load (SWL) Of Polyester Slings
  • Recommendation For Inspection Of Polyester Slings For Detection Of Damage

Rigging Attachments

Eye Bolts And Ring Bolts

  • Lifting With Eye Bolts
  • Alignment Of Eye Bolts
  • Safe Working Loads Corresponding To Angle Of Pull


  • Alloy Bow Type Shackles
  • Large Dee With Screw Collar Pin Galvanised

Crosby Clamps

  • Green Pin-U.S. Fed Specification
  • Commercial
  • Recommended Methods Of Applying Crosby Clamps
  • Rope Clips
  • Incorrect Methods Of Applying Wire Rope Clips


  • Eye One End Hook Other End


  • Ordinary Galvanised
  • Standard Commercial Galvanised


  • Hook Inspection

Wire Rope Blocks

  • Calculation: Parts Of Line Required

Rope Reeving

  • Symmetrical (Balanced) Reeving
  • Eccentric (Unbalanced) Reeving

Slinging General Information

  • Eccentric Loading

Slings And Safe Working Load Sling Configuration

  • Single Vertical Hitch
  • Bridle Hitch
  • Single Basket Hitch
  • Double Basket Hitch
  • Double Wrap Basket Hitch
  • Single Chocker Hitch
  • Double Chocker Hitch
  • Double Wrap Chocker Hitch
  • Endless Slings Or Grommet Slings

Sling Angles

  • Effect Of Sling Angle On Sling Load

Wind Loading

  • Beaufort Wind Scale For Use On Land

Operator’s Communication (Standard Hand Signal)

Requirements For Hand Signals

  • Start & Stop
  • Selection Of Hoists
  • Raising And Lowering Of Hook
  • Movement
  • Travel Of Crane
  • General Movement
  • Overhead Crane Horn (Hooter) Signals

Two-Way Radio

Semaphore Flag Signal

Cab Controlled Overhead Cranes: General Safety

General Safety Regulation

Cab Controlled Overhead Crane Safe Operational Responsibilities

  • Site Supervision
  • Crane Operational Responsibilities

Cab Controlled Overhead Crane Safety Rules

  • Before Operation
  • Hazards Associated With Overhead Cranes And Lifting Equipment

Risk Control Situations

  • General
  • Selection
  • Inspection
  • Disposal
  • Storage
  • Fibre Rope Slings

Emergency Response

Care And Maintenance Of Your Fire Extinguishers

  • Fire Extinguisher Inspection
  • Fire Extinguisher Maintenance
  • How A Fire Extinguisher Works
  • Types Of Fire Extinguishers
  • How Fire Works
  • Basic Fire-Fighting Tips
  • How To Fight A Fire Safely
  • Never Fight A Fire When
  • What To Do When Your Clothes Catch Fire


.Entry level requirements into this programme?

All new entrants intended under this code (Novice or Re-licensing) shall provide training institution with the required documents as specified under the National Code Of Practice (NCOP No 43835) Promulgated 23 October 2020

  • An employer declaration or medical certificate confirming the medical fitness of the learner to undergo the intended training
  • An eye test results issued by a person trained to carry out such tests
  • All new entrants intended under this code will be required to hold at least a Grade 9 (Std 7) school certificate
  • Learners shall provide training institution with a valid certified copy of his/her Identity Document
  • Employers must provide a valid copy of the Cab Controlled Overhead Crane Load Test Certificate
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