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Products > Climbing-Equipment > Extension Ladders > D1200-2 Series > D1240-2 40 ft Type II Aluminum D-Rung Extension Ladder > D1240-2

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D1240-2 40 ft Type II Aluminum D-Rung Extension Ladder

Performance Overview

SizeStyleApprox. Closed LengthReach HeightLoad CapacityPerformance Rating
40 ftMulti Section20 ft37 ft225 lbs

The D1240-2 Aluminum 40 ft Extension Ladder has a duty rating of 225 pounds and interlocking side rails. The TRACTION-TRED® D rungs are slip resistant and the side rails are interlocking. Heavy duty spring-loaded locks operate smoothly. Durable shoes rest flat or are held in spur position with SHU-LOK® feature. Mar-resistant end caps help protect the surface ladder is leaning against. Exclusive ALFLO® rung joint means TWIST-PROOF® performance every time.


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-3/4 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
  • Heavy Duty modified I-beam side rails
  • Durable shoe rests flat on slip resistent pad or is held in spur position with SHU-LOK® feature


FeatureSize / Details
Size40 ft
Max. Safe Working Height35 ft
Max. Open Extended Length35 ft
StyleMulti Section
Load Capacity225 lbs
Rung TypeD-Rung
Foot MaterialSlip-resistant pad
Number of Sections2
Base Width17-3/8 in outside rails
CertificationsANSI A14.2 (2007); OSHA
Approx. Closed Length20 ft
Reach Height37 ft
Approx. Shipping Weight Lbs.73.5
Approx. Cu. Ft. Per Unit14.4
Performance Rating

Package Contents

Part NumberQtyDescription


Rails Dimension3 in
Flange Dimension1 in
Rung Dimension1-3/4 in
Fly Width15-1/4 in

Additional D1200-2 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 ft22
D1220-220 ft17 ft17 ft10 ft19 ft27
D1224-224 ft21 ft21 ft12 ft23 ft33.5
D1228-228 ft25 ft25 ft14 ft27 ft43
D1232-232 ft29 ft29 ft16 ft31 ft54
D1236-236 ft32 ft32 ft18 ft34 ft62.5
D1240-240 ft35 ft35 ft20 ft37 ft73.5

D1240-2 40 ft Type II Aluminum D-Rung Extension Ladder is rated 4.0 out of 5 by 1.
Rated 4 out of 5 by from Good, Light Ladder I needed an all purpose ladder for working around a two story home. As I'm getting older, I also needed it to be light. I'm 170 lbs, so I had good weight range for this ladder. The spring-loaded locks don't work smoothly, so keep an eye on those.
Date published: 2015-11-06
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  • clientName_werner

need part number for flipper kit for D1240-2

Asked by: fortyfoot
In order to see if we have a flipper kit available for this model of ladder, we would also need the MK/Mark number off the ladder. Please visit our website at www.buywerneronline.com to order your desired replacement parts online. Contact our customer care department if you have any questions. Please have your model number and MK/MARK number available off of your ladder/accessory at the time of your call so we can provide the correct direction. Our customer service toll free number is 888-523-3370 Monday through Friday 8 AM till 5 PM EST.
Answered by: Werner Customer Care
Date published: 2015-05-27

Ladder Locks for D1240-2

Can I purchase replacement Ladder Locks for my ladder? When I search replacement parts it has no results for my model number.
Asked by: JRC
In order to see if we have replacement locks available for your D1240-2, we would also need to know the mark number (MK) of the ladder. This can also be found on the duty rating sticker on the side rail of the ladder. Once you find the MK and enter the info online, our website should provide you with the correct part number of the lock you need. If you have any additional questions or concerns, please contact our Customer Care Department when convenient at 888-523-3370 Monday through Friday 8 AM till 5 PM EST for further details on your issue and/or question.
Answered by: Werner Customer Care
Date published: 2015-10-27

Can the D1240-2 be separated and the base used as a single section ladder?

Asked by: Steve
No, the D1240-2 can not be separated and used as a straight ladder.
Answered by: Werner Customer Care
Date published: 2016-05-02

What does this ladder weigh ?

Asked by: Old roofer
Weight of the D1240-2 ladder is 73.5lbs
Answered by: Werner Customer Care
Date published: 2017-09-30

How can I buy new ladder keepers for my werner 1128-2 28' extension ladder?

Asked by: steve
You can purchase new locks from our website, www.wernerco.com. The Replacement Parts section can be accessed from our main site and utilized to procure replacement parts. Thank you for your inquiry.
Answered by: Werner Customer Care
Date published: 2015-06-02

Can the two sections of the D1228-2 be separated so that each 14 ft. piece could be used as a fixed length ladder?

Asked by: Anonymous
The D1228-2 can not be separated into sections. The fly section does not have the proper footing to be used as a single ladder.
Answered by: Werner Customer Care
Date published: 2017-05-24

what is the width of the ladder

Asked by: Anonymous
The D1232-2 Aluminum Extension ladder is 17-3/8 inches wide, outside to outside of the rails.
Answered by: Werner Customer Care
Date published: 2015-03-21

Full dimensions in closed position

Can you please tell me all the dimensions of the ladder in the closed position? I assume it is 12 feet (height), 17 3/8 inches (width), and 6 inches (side length of both rails)?
Asked by: Anonymous
The D1224-2 is 146 9/32" when it is in the closed position.
Answered by: Werner Customer Care
Date published: 2017-01-02

Adjustable EverLevel® leveling system

To Whom it May Concern, Do you hava an adjustable leveling system for the Model # D1232-32' Type II Aluminum Extention Ladder? Also, is there a stablizer bar with optional soft rubber end caps available for the stabilizer bar? Thank you,
Asked by: Bill
For the D1200-2 Aluminum Type II Extension Ladder, the proper leveling kit would be the PK80-2 Automatic Ladder Levelers. The AC96 Aluminum Stabilizer has rubber end caps that would protect the work surface.
Answered by: Werner Customer Care
Date published: 2013-10-22

i need the labels for the d1224-2 extension ladder mark 21 where can i get these

Asked by: juan
Werner Co. does offer replacement safety label kits and duty rating label kits. These kits may be special ordered through your local distributors. Please provide the distributor with your model number and they can special order the correct kits for your unit.
Answered by: Werner Customer Care
Date published: 2017-08-13
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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.