FALLS IN THE WORKPLACE
Mast Climbing Work Platforms
Mast Climbing Work Platforms (MCWPs), or mast climbers, are a type of construction elevating equipment used to perform work at height. Mast climbers are equipped with a powered drive unit for propelling the work platform up and down a vertical mast structure. As with any type of equipment used to accomplish work at height, safety hazards may be present. Such hazards can result in injury or death.
Training is necessary for anyone using mast climber equipment. NIOSH has developed an online tool to help those who might use mast climbers identify common hazards. This educational resource can also help employers, trainers, and safety and health professionals to prevent work-related falls. Using the inspection tool is not a substitute for OSHA training requirements for MCWPs.
Note: Every mast climbing work platform configuration and set-up is specific to the site. Always consult manufacturer specifications and guidelines for each specific set-up as they can vary from site to site. Mention of any company or product does not constitute endorsement by the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention.
This free daily inspection walkthrough tool allows mast climber users to navigate through what is commonly inspected during a pre-shift daily inspection. When prompted, click on the orange outlined section and the related inspection point will be displayed. Please note the pictures displayed are of a typical mast climbing work platform configuration and do not include all set-ups that may be present on site.
Use the MCWP Daily Inspection Walkthrough today!
Falls are the leading cause of death for construction workers, killing more than 200 U.S. workers each year.1
Between 2011-2014, 1,380 workers were injured as a result of operating an aerial lift or scissor lift. 360 of these injuries were a result of slips, trips, and falls from one level to another.2
Between 2011-2014, 87 workers died as a result of operating an aerial lift or scissor lift. 48 of these deaths were a result of slips, trips, and falls from one level to another.3
1CPWR: The Center for Construction Research and Training. Stop Construction Falls: About the Campaignexternal icon (Accessed September 1, 2016).
2US Department of Labor, Bureau of Labor Statistics Survey of Occupational Injuries and Illnesses (nonfatal data)external icon. Date accessed: July 18, 2016.
3US Department of Labor, Bureau of Labor Statistics Census of Fatal Occupational Injuries query system (fatal data)external icon. Date accessed: July 18, 2016.
Why are aerial lifts used?
Aerial lifts are used to elevate workers to various heights to perform a variety of work-related tasks, including: painting, drywall installation, and maintenance. Aerial lifts are mobile making them easy to deploy to a number of jobsites, plus they involve minimal setup time. For these reasons, aerial lifts are often used instead of scaffolding.
Where are aerial lifts used?
Aerial lifts are popular at various jobsites including:
- General building maintenance
- Other industries that are required to elevate workers to: move materials, change lightbulbs, store boxes, and other tasks
What are the risks associated with using aerial lifts?
Aerial lifts can expose workers to risks, such as falls, because they are mobile, used as elevating equipment, and are considered a restricted work space. Aerial lifts are used in a number of different conditions, such as adverse weather conditions and high-traffic, continually-changing worksites. These conditions create other hazards that expose workers to injury, including crushing/trapping hazards, electrocutions, and tip overs. Proper safeguarding can reduce or eliminate injury events.
Recommended safe work practices for aerial lifts are included in ANSI Standards and OSHA Requirements.
The Simulator is designed to help potential aerial lift operators acclimate to aerial lift operation and to identify the common occupational hazards during use, such as depressions (potholes), crushing hazards, tip over hazards, etc. Using the Simulator is not a substitute for required training to operate an aerial lift.
To launch the Simulator:
- Click on the Launch Aerial Lift Hazard Recognition Simulator button below to download the Simulator. Note: The files for the Simulator may take a few minutes to download.
- Click Open on the menu
- Double click LiftSimulator Application
- Click Extract All
- Click Browse to select or create a folder location on your computer’s hard drive. Do not select a networked shared drive.
- Select “Extract” (one folder and one application file will download).
- Open the LiftSimulator Folder that was created.
- Double click Lift_Simulation Application to run the Simulator.
- If on a newer version of Windows 10, you may get a pop up stating that “Windows protected your PC.” Click “More info” and then click “Run anyway.”
- Enable the audio on your computer. Directions are provided audibly.
- Select which Aerial Lift Simulation you would like to play!
To use the Simulator:
- Select the screen resolution and graphics quality if needed by clicking “Settings” in the menu.
- Once launched, you the will be prompted to position the lift in the appropriate area while avoiding hazards.
- To maneuver the lift use your keyboard. Press “h” if you require assistance.
- Follow the green arrows and align the lift with the transparent platforms visible at various locations in the work area.
- You will be notified when you have reached each target area successfully.
- To finish the scenario, park the lift at the final location.
Aerial lifts, commonly used on construction sites, expose workers to falls. To prevent these falls and other aerial lift-related injuries and deaths, NIOSH developed the Aerial Lift Hazard Recognition Simulator. This flyer gives employers, trainers, safety professionals, and aerial lift operators information on the Simulator and how to access it.
The following pages contain helpful information related to the safe use of aerial lifts:
To address aerial lift safety, NIOSH studied and tested elevating devices, specifically the ability of aerial lifts to resist and survive commonly encountered occupational exposures (e.g., pothole depressions, curbs, and horizontal load tests). Exposures examined were primarily those defined by the ANSI standard (A92), which is a mandatory standard by OSHA (A1926.453).
NIOSH wishes to acknowledge the comments and input from the following ANSI committees, representatives and individuals, in reviewing the NIOSH topic page to help ensure that standards and industry-wide procedures for safe operation of aerial lifts were included: ANSI A10.29, A92, as well as Dennis W. Eckstine (Eckstine & Associates, Inc.), Chuck Wigger (Lamar Advertising Company), F.G. (Rick) Heath (Heath and Associates), Michael J. Kassman (International Masonry Training and Education Foundation), Tony Groat (International Powered Access Federation), Denise Almonte (Safety First), and Dave Merrifield (Scaffold Access and Industry Association).