Super Duty Aluminum Rolling Ladder

For the workspace that demands the toughest ladder. Period.

Every day, work is done where equipment needs to be able to take a beating and keep working. For the toughest jobs, Cotterman® offers the Super Duty Aluminum Workmaster™ ladder. Built with extra heavy duty components, the Aluminum Workmaster™ ladder is resistant to bumps and dings in harsh work environments. It’s aluminum construction creates a more lightweight ladder for easier mobility.

500 lb. load rating.

  • 59° climb angle.
  • 1-1/2 diameter x 14 gauge tube construction.
  • 24″ x 24″ platform.
  • Adjustable steel front legs level the ladder.
  • Yellow powder coated handrail and bottom step finish creates high visibility.
  • Aluminum Workmaster™ Super Duty ladders meet applicable OSHA and ANSI standards.



  • All tube members are 1-1/2” x 14 gauge tube construction.
  • Handrails & Bottom Step constructed from steel.
  • All welded construction.
  • Gray Powder coat with safety yellow handrails is the standard finish.

8 stairway tread support welds per step, for a stronger, longer lasting, and safer ladder.

Multiple Tread OPTIONS

Cotterman® offers a variety of tread types to suit your needs. So, no matter what environment your ladder will be in, we have a tread that will offer the optimal grip.


Heavy Duty Serrated (A3)

Open step Premium Serrated Tread.


The Workmaster™ comes standard with 24″ wide steps.


24″ Tread Width

Open step Premium Serrated  Heavy Duty Tread.

On The Ground


Modular Front Leg and Locking Casters

Field Replaceable, Adjustable Front Legs that level the ladder. Casters lock and unlock with a simple up and down foot pedal.

Cotterman-workmaster-super heavy duty

Optional Self-Closing Safety Gate

Protects user from accidentally falling off the top platform. Spring-Loaded Self-Closing Safety Gate opens easily and closes behind the user. Available on all sides of the platform.

Cotterman-workmaster-super heavy duty


First Thing’s First

First, we need to determine what size ladder you need. One of the most common mistakes made in ordering many ladders is getting them too large for the available workspace. Here are some things to consider before ordering your new ladder:


A: Working Height

is the approximate height that you would like to be able to comfortably reach. It is usually calculated at 5.5′ above the ladder’s platform height.

B: Overall Height

is VERY important. You want to be sure that your ladder will not be too tall to fit into your workspace. This includes being able to fit through any doors that you may need to move it through, or under any ceilings or fixtures that you may have.

C: Top Step Height

is the measurement of the top step from the ground. It’s important that this measurement is not too far above or below your desired working height.

D: Base Width

is also very important because as ladders get taller, the base width increases. It is important to be sure that the ladder will not be too wide for your workspace. We offer different tread widths to accommodate most work areas.

E: Base Length

is the measurement of how long the base of the ladder runs. This is dependent upon the height of the ladder. The taller the ladder, the longer the base. Also lower climb angles increase base length.

Product Selection Guide

Our NEW Product Selection guide can assist you in choosing the correct ladder for your application. Once you find the ladder that has the correct dimensions for you, just select the red model number, we’ll then ask you to select your tread type, tread width and platform depth. After that we’ll show you the model number(s) that is the best fit for your use.

Short DescriptionTread TypePlatform HeightOverall HeightWorking HeightPart Number
5 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread5092116WMXA05R37A3P3
6 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread60102126WMXA06R37A3P3
7 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread70112136WMXA07R37A3P3
8 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread80122146WMXA08R37A3P3
9 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread90132156WMXA09R37A3P3
10 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread100142166WMXA10R37A3P3
11 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread110152176WMXA11R42A3P3
12 Step Aluminum Workmaster Super Duty Rolling Ladder(A3) Serrated Tread120162186WMXA12R42A3P3

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