Series 4000 Ladder

Series 4000 Supported Cantilever Ladders Logo

300 lb. load rating.

  • Framework is 1″ O.D. steel tubing. Base is 2″x2″x1/4″ steel angle.
  • Can be folded for shipping or storing.
  • Steps are 24″Wx7″D. Top step is 24″Wx10″D (20″ deep top step is available).
  • Horizontal distance from rear of base to vertical support is 32″ (8-12 step), 20″ (6 step), and 14″ (5 step).
  • 4″ rigid casters on rear, 4″ swivel casters with SafeLock on front, and 2-1/2″ diameter rubber pads on legs.
  • Series 4000 ladders meet applicable OSHA and ANSI standards.

Series 4000 Supported Cantilever Ladders Logo


RML 6500 Series Tread

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

  • All tube members are 1” steel tube construction.
  • Gray Powder coat is the standard finish.

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.

RML Series 1000 Tread Serrated

cotterman UnaGrip Logo  (A3)

RML Series 1000 Tread Expanded

Expanded Metal (A1)

Open step design prevents debris buildup.


The Series 5000 ladder comes with 24″ wide steps.

RML Series 1000 Tread 24

24″ Tread Width

On The Ground

RML Series 1000 caster2

5-12 Step  SafeLock™

with 4” wheels. Foot-activated locking mechanism with swivel casters and rigid rear wheels. Standard on all Series 5000 models.

Choose your Series 4000 Ladder

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:

Rolling Metal Ladders FTF

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.

*Options such as deeper top steps are available, and will increase the base length. Top steps are available in 10″ – 12″(standard), 20″ – 24″, and 30″.

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.

Description Top Step Height Overall Height Working Height Part Number
5 Step Steel Cantilever Rolling Metal Ladder 50 92 116 4005R
6 Step Steel Cantilever Rolling Metal Ladder 60 90 126 4006R
7 Step Steel Cantilever Rolling Metal Ladder 70 112 136 4007R
8 Step Steel Cantilever Rolling Metal Ladder 80 110 146 4008R
9 Step Steel Cantilever Rolling Metal Ladder 90 132 156 4009R
10 Step Steel Cantilever Rolling Metal Ladder 100 130 166 4010R
11 Step Steel Cantilever Rolling Metal Ladder 110 152 176 4011R
12 Step Steel Cantilever Rolling Metal Ladder 120 162 186 4012R

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