English [Español]
United States [Change]
Products > Climbing-Equipment > Extension Ladders > D1100-2 Series > D1120-2 20 ft Type III Aluminum D-Rung Extension Ladder > D1120-2

Product Image


  •  View D1100-2 Series Page
  •  Series Comparison
  •  Replacement Parts
  • Share
  •  Email page | Print this page


Complementary Products

You May Also Consider

D1120-2 20 ft Type III Aluminum D-Rung Extension Ladder

Performance Overview

SizeStyleApprox. Closed LengthReach HeightLoad CapacityPerformance Rating
20 ftMulti Section10 ft19 ft200 lbs

The D1120-2 Aluminum 20 ft Extension Ladder is lightweight yet has a duty rating of 200 pounds. The TRACTION-TRED® D rungs are slip resistant. Spring-loaded locks operate smoothly for easy operation. Pivoting shoes with slip-resistant foot pads. Mar-resistant end caps help protect the surface the ladder is leaning against. Exclusive ALFLO® rung joint means TWIST-PROOF® performance every time.


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-1/2 in slip-resistant TRACTION-TRED® D-rungs
  • Durable extruded rung locks are spring loaded to operate smoothly
  • Mar-resistant end caps
  • Smooth operating pulley with polypropylene rope
  • Modified I-beam side rails to optimize strength and weight
  • Pivoting shoe with slip-resistant pad


FeatureSize / Details
Size20 ft
Max. Safe Working Height17 ft
Max. Open Extended Length17 ft
StyleMulti Section
Load Capacity200 lbs
Rung TypeD-Rung
Foot MaterialSlip-resistant pad
Number of Sections2
Base Width16 in outside rails
CertificationsANSI A14.2 (2007)
Approx. Closed Length10 ft
Reach Height19 ft
Approx. Shipping Weight Lbs.23
Approx. Cu. Ft. Per Unit6.2
Performance Rating

Package Contents

Part NumberQtyDescription


Rails Dimension2-3/4 in
Flange Dimension15/16 in
Rung Dimension1-1/2 in
Fly Width14-1/8 in

Additional D1100-2 Series Models

Model No.SizeMax. Safe Working HeightMax. Open Extended LengthApprox. Closed LengthReach HeightApprox. Shipping Weight Lbs.Buy Online
Not equipped with rope and pulley
16 ft13 ft13 ft8 ft15 ft18.5
D1120-220 ft17 ft17 ft10 ft19 ft23
D1124-224 ft21 ft21 ft12 ft23 ft30
D1128-228 ft25 ft25 ft14 ft27 ft38.5

What is a type III duty Rating?

Asked by: Tom
A type III duty rating is rated at 200lbs.
Answered by: Werner Customer Care
Date published: 2017-01-02


Asked by: NONNA
Please visit our website at www.buywerneronline.com to order your desired replacement parts online. Have your model number and MK/MARK number available off of your ladder at the time to order the correct replacement parts.
Answered by: Werner Customer Care
Date published: 2016-09-27

Is there a leveling kit available for Model D 1120-2 ?

Asked by: exvetter
The PK80-2 leg leveler will fit your model of ladder.
Answered by: Werner Customer Care
Date published: 2015-11-28

Contracted length?

What is the length of the ladder when it is contracted to its minimum, shortest length?
Asked by: gstraub
Answered by: Werner Customer Care
Date published: 2014-10-02

How do I make sure it is locked when extended?

Asked by: Ginny
When the extension section is raised, the locks will fully engage by hooking over the base rung. The locks should be seated fully on both rungs, one on the fly and one on the base. When the locks are fully engaged, the fly section will remain secured in place.
Answered by: Werner Customer Care
Date published: 2014-03-04


Asked by: Mac
Pricing and product are solely provided by distributors in your area. Please visit our website at www.wernerladder.com and utilize our distributor locator to identify the nearest distributors in your area.
Answered by: Werner Customer Care
Date published: 2015-05-04

what stablilizer will work on D1120-2 ladder

Asked by: homeowner
For the D1100-2 series Aluminum Extension Ladders, either the AC96 Aluminum Stabilizer, or the 97P Adjustable Stabilizer would fit.
Answered by: Werner Customer Care
Date published: 2015-01-21

type of aluminum

what type of aluminum is this made out of? have an older one that's been cracked and wondering what to weld it with? what grade? or can you tell me what your people use to weld this?
Asked by: drew bob
If you have a cracked ladder, you will need to take it out of commission. No welding is to be done to a ladder. This is aluminum. The grade of aluminum is proprietary to Werner Co.
Answered by: Werner Customer Care
Date published: 2016-11-10

Can I fully extend ladder to lock in last available rung safely?

Need to reach as high as possible. Ladder doesn't seem to want to catch farther than 3 rungs from end.
Asked by: june
you cannot
Answered by: Werner Customer Care
Date published: 2017-05-15

Stabilizer AC78

Why can't the stabilizer AC78 be used with the Werner Type III 200lbs ladder?
Asked by: 2win4
We do not suggest using the AC78 on a type III extension ladder due to the amount of stress it can cause on the fly section of the ladder. This is something we suggest for your safety.
Answered by: Werner Customer Care
Date published: 2015-07-07
  • y_2017, m_9, d_20, h_23CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_32
  • loc_en_US, sid_D1120-2, prod, sort_[SortEntry(order=LOCALE, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_werner

Different types of ladders are designed to keep you safe and productive when climbing or standing. Using the wrong style of ladder or simply ignoring the limitations of climbing equipment can result in a fall or serious injury.
Height is referring to the actual ladder height. Extension ladders should be 7 to 10 feet longer than the highest support or contact point, which may be the wall or roof line. The highest standing level is four rungs down from the top. The highest permitted standing level on a stepladder is two steps down from the top.

Reach height is the maximum reach assuming a 5’6” person with a vertical 12” reach.
Ladders are designed to safely hold up to a specific amount of weight. The Werner Performance System defines five different capacities using a color and star rating system. The Duty Rating is defined as the maximum safe load capacity of the ladder. A person’s fully clothed weight plus the weight of any tools and materials that are carried onto the ladder must be less than the load capacity.

Werner offers ladder made from fiberglass and aluminum. Each material has characteristics which make it best for certain applications, or one material may simply fit the personal preferences of the user. For example, if working around electricity users should select fiberglass products due to their non-conductive side rails.