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Products > Climbing-Equipment > Extension Ladders > D7100-2 Series > D7120-2 20 ft Type IAA Fiberglass D-Rung Extension Ladder > D7120-2

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D7120-2 20 ft Type IAA Fiberglass D-Rung Extension Ladder

Performance Overview

SizeStyleApprox. Closed LengthReach HeightLoad CapacityPerformance Rating
20 ftMulti Section10 ft19 ft375 lbs

The D7120-2 extension ladder boasts a duty rating of 375 pounds and features the exclusive ALFLO® rung joint that guarantees TWIST-PROOF® performance. External guides at top of base section help secure the interlocking side rails. Pre-pierced holes at the top of the fly section allow for easy field installation of accessories. The plate and rung assembly are riveted at four points to each side rail. The TRACTION-TRED® D rungs are slip resistant and the durable rail shield and shoe bracket protects the rail from damage. NOTE: Image displayed is D7124-2 24 ft Type IAA Fiberglass D-Rung Extension Ladder


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-1/4 in slip-resistant TRACTION-TRED® D-rungs
  • Plate and rung assembly are riveted at four points to each side rail to allow for rung replacement
  • Smooth operating pulley with polypropylene rope
  • Interlocking Side Rails with nylon coated internal rail guides on bottom of fly section increase ease of operation
  • External guides at top of base section securely interlock rails
  • Base and fly separate easily to use base section as single ladder
  • Slip-resistant TRACTION-TRED® D-rungs
  • Rugged, heavy duty extruded rung locks are spring loaded to operate smoothly
  • Pre-pierced holes for easy field installation of accessories
  • Durable rail shield and shoe bracket protects rail from damage
  • Dual action feet with slip-resistant pad and spur plate for use on hard or penetrable surfaces
  • Mar-resistant molded end caps
  • Ideal for utility and telecommunication industries


FeatureSize / Details
Size20 ft
Max. Safe Working Height17 ft
Max. Open Extended Length17 ft
StyleMulti Section
Load Capacity375 lbs
Rung TypeD-Rung
Foot MaterialSlip-resistant pad
Number of Sections2
Base Width19 in outside shoes
CertificationsANSI A14.5 (2007); OSHA
Approx. Closed Length10 ft
Reach Height19 ft
Approx. Shipping Weight Lbs.50
Approx. Cu. Ft. Per Unit8.7
Performance Rating

Package Contents

Part NumberQtyDescription


Rails Dimension3-5/16 in
Flange Dimension1-3/16 in
Rung Dimension1-5/8 in
Fly Width16-1/8 in

Additional D7100-2 Series Models

Model No.SizeMax. Safe Working HeightMax. Open Extended LengthLoad CapacityBase WidthApprox. Closed LengthBuy Online
Not equipped with rope and pulley
16 ft13 ft13 ft375 lbs19 in outside shoes8 ft
D7120-220 ft17 ft17 ft375 lbs19 in outside shoes10 ft
D7124-224 ft21 ft21 ft375 lbs19 in outside shoes12 ft
D7128-228 ft25 ft25 ft375 lbs19 in outside shoes14 ft
D7132-232 ft29 ft29 ft375 lbs19 in outside shoes16 ft
D7136-236 ft32 ft32 ft300 lbs22 in outside shoes18 ft
D7140-240 ft35 ft35 ft300 lbs22 in outside shoes20 ft

D7120-2 20 ft Type IAA Fiberglass D-Rung Extension Ladder is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Best Ladder you'll ever own! Using this ladder is like standing on the ground, yes it's that solid. I am a 250 pound man lugging up my tools and sometimes very heavy parking lot lights and I never once thought this ladder would fail me. I've had my D7124-2 24 for 15 years now. It has sat on my roof racks on my truck for 15 grueling New England seasons, from the extreme heat to the -40 temperatures in northern New Hampshire enduring the worst conditions possible plus throwing in mud, sand, sun and road salt.I'm here on the website today because It's finally time to replace it due to the truck roof racks were starting to wear into it and the gel coat is virtually gone.If you want your family to see you at the end of the day be sure to get the D7100 series, if you want to save a few bucks and get a cheapy your not doing yourself any favors, it's well worth the extra. I wouldn't even consider buying anything else.
Date published: 2015-11-01
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Can I add a aftermarket ladder leveler to this product?

It requires the ladder to have holes drilled in the base. Does this void the warranty? Is the latter considered 'safe' after this modification?
Asked by: Anonymous
You can install the PK70-1 or PK80-2 levelers. Installing these correctly will not make the ladder unsafe
Answered by: Werner Customer Care
Date published: 2017-06-27

What are the dimensions (plural) as in all three dimensions, not just the length, of the collapsed ladder?

This ladder is going in a fabricated metal box. I need to quarantee that it will fit in the box. I need all three dimensions of the collapsed ladder.
Asked by: Anonymous
The dimensions of the D7116-2 are 100 3/8" X 19 1/16" X 6 5/16".
Answered by: Werner Customer Care
Date published: 2015-08-31

What are the collapsed dimensions of this ladder?

Asked by: Anonymous
The closed dimension of the D7116-2 is 100 3/8".
Answered by: Werner Customer Care
Date published: 2016-02-21

Why are the specs on the 1AA 40ft ext. Ladder conflicting?

Part of the discription says its 375lb rated and part says its only 300lb rated. What's correct? Is it actually a1AA ladder?
Asked by: Surfpalani
For the models D7116-2 through D7132-2, these models are rated at 375lbs. Models D7136-2 and the D7140-2 are rated at 300lbs. Therefor the D7140-2 has a 300lb duty rating.
Answered by: Werner Customer Care
Date published: 2015-08-30

How do you separate the base from the fly section?

It seems like you would have to remove an end cap to eliminate interference in one of the brackets. It seems the end caps are permanently mounted.
Asked by: Russ
Yes the D7140-2 can be separated so you can use the base section as a straight ladder. You would not need to remove any end caps in order to separate the 2 sections. You would need to slide the fly section off the base section through the top of the ladder.
Answered by: Werner Customer Care
Date published: 2015-08-30

Winter Storage - I need to store the ladder outside in New England weather. Should I look at fiberglass or aluminum?

Asked by: John
Our ladders are not weatherproof. Werner ladders can tolerate some degree of elements but are not 100% rust proof. If exposed to extreme weathering, some components such as rivets, nuts, bolts, etc could rust over time. Exposure to the sunlight and weathering can affect resin coating on a fiberglass ladder. A ladder left in these conditions can experience a Surface Weathering or Fiber Bloom. In this situation it is recommended to recoat the ladder. Please visit the Literature section of our website to find the Fiberglass Technical Manual for further information and treatment for a fiberglass ladder. When it comes to life expectancy, one will not last longer than the other.
Answered by: Werner Customer Care
Date published: 2015-12-01

What is the warranty on a 28' fiberglass ladder?

Asked by: Gary
Werner Co. does not offer a written or implied warranty on its products. We do stand behind the quality and workmanship of our models. Issues of this nature would usually become evident within the first 6 to 12 months of ownership.
Answered by: Werner Customer Care
Date published: 2014-10-27

Ladder top support point

I'm having a bit of difficulty in correlating ladder height vs. reach height vs. maximum working length vs. maximum open extended length vs. height to gutter or top support point. I want to access second floor dryer exhaust vent caps at about 28 feet above ground level. I was thinking in terms of a D7128-2 ladder, which looks to fit my needs in all regards until I see the height to top support point specification from http://www.wernerco.com/us/support/ladder-safety-tips/how-to-choose-a-ladder which seems to indicate that I need a standoff of some sort in the range of 17 to 21 feet above the ladder base with no further support allowed as I climb the rest of the ladder to having my feet at about a 23 or 24 foot level above the ground. Am I correctly understanding this? Thank you.
Asked by: Cucarache
If you need to reach 28 feet I would recommend the D7132-2 it has a 31 ft reach height. The D7128-2 only has a reach height of 27 ft
Answered by: Werner Customer Care
Date published: 2017-05-15

What is the length of each section D132-2 32'

Asked by: Jim
A 32 foot extension ladder, such as the D7132-2 is made from two 16 foot sections. The length of the ladder is total length of the two sections.
Answered by: Werner Customer Care
Date published: 2013-10-22

16 foot ladder

What is the collapsed length of your 16 foot extension ladder? D7116-2?
Asked by: Gina
The D7116-2 is made from two 8 foot sections of ladder, totalling 16 feet when addeded together. The collapsed length of the ladder is 8 feet.
Answered by: Werner Customer Care
Date published: 2013-10-22
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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.