English [Español]
United States [Change]
Products > Climbing-Equipment > Extension Ladders > D500-2 Series > D524-2 24 ft Type IAA Aluminum D-Rung Extension Ladder > D524-2

Product Image


  •  View D500-2 Series Page
  •  Series Comparison
  •  Replacement Parts
  • Share
  •  Email page | Print this page


Complementary Products

You May Also Consider

D524-2 24 ft Type IAA Aluminum D-Rung Extension Ladder

Performance Overview

SizeStyleApprox. Closed LengthReach HeightLoad CapacityPerformance Rating
24 ftMulti Section12 ft23 ft375 lbs

The D524-2 24 ft aluminum extension ladders have a duty rating of 375 pounds and feature the exclusive ALFLO® rung joint for a TWIST-PROOF® performance every time. The end caps are mar resistant and notched for easy separation of sections. Both the base and the fly sections can be used separately. Internal guides increase the ease of operation when raising and lowering. The feet are heavy-duty, self-aligning and free swinging for hard or penetrable surfaces. Rugged spring-loaded locks operate smoothly. TRACTION-TRED® D rungs are slip resistant. Duty rating changes to 300 pounds for 36 ft-48 ft models.


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-3/4 in slip-resistant TRACTION-TRED® D-rungs
  • Heavy Duty extruded rung locks are spring loaded to operate smoothly
  • Base and fly separate easily for use as an extension or two single sections
  • Smooth operating pulley design with 3/8 in rope
  • Internal guides increase ease of operation
  • Extra Heavy Duty I-beam rails
  • Rugged spring loaded locks operate smoothly
  • Heavy duty, self-aligning, free-swinging shoe with slip-resistant tread and replaceable steel spur plate
  • Mar-resistant end caps notched for easy separation of sections


FeatureSize / Details
Size24 ft
Max. Safe Working Height21 ft
Max. Open Extended Length21 ft
StyleMulti Section
Load Capacity375 lbs
Rung TypeD-Rung
Foot MaterialSlip-resistant pad
Number of Sections2
Base Width19-1/8 in outside Shoes
CertificationsANSI A14.2 (2007); OSHA
Approx. Closed Length12 ft
Reach Height23 ft
Approx. Shipping Weight Lbs.49
Approx. Cu. Ft. Per Unit10.4
Performance Rating

Package Contents

Part NumberQtyDescription


Rails Dimension3-1/4 in
Flange Dimension1-3/16 in
Rung Dimension1-3/4 in
Fly Width16-7/8 in

Additional D500-2 Series Models

Model No.SizeMax. Safe Working HeightMax. Open Extended LengthLoad CapacityBase WidthApprox. Closed LengthBuy Online
D520-220 ft17 ft17 ft375 lbs19-1/8 in outside Shoes10 ft
D524-224 ft21 ft21 ft375 lbs19-1/8 in outside Shoes12 ft
D528-228 ft25 ft25 ft375 lbs19-1/8 in outside Shoes14 ft
D532-232 ft29 ft29 ft375 lbs19-1/8 in outside Shoes16 ft
D536-236 ft32 ft32 ft300 lbs19-1/8 in outside Shoes18 ft
D540-240 ft35 ft35 ft300 lbs19-1/8 in outside Shoes20 ft
D544-244 ft39 ft39 ft300 lbs20-1/8 in22 ft
D548-248 ft43 ft43 ft300 lbs20-1/8 in24 ft

The collapsed length of my fiberglas extension ladder is approx. 12'-6". What length would this ladder be considered?

Asked by: Anonymous
The length of a ladder is measured by the total length of the rails, both sections. If both sections of the ladder are 12 feet long, this would be a 24 foot ladder.
Answered by: Werner Customer Care
Date published: 2015-09-27

Is this ladder comparable to the Model D13282 [250# limit], or is another current model more similar? I am looking for a similar quality ladder.

Asked by: Bobby
The D524-2 is a 24ft 375lb rated extension ladder. For an aluminum 250lb rated extension ladder you will need the D1328-2 for 28', and D1324-2 for 24'.
Answered by: Werner Customer Care
Date published: 2016-05-02

what is the collapsed height ?

Asked by: clint
The shipping length is 12'.
Answered by: Werner Customer Care
Date published: 2017-01-04

Does this ladder meet NFPA 1932 requirements?

Asked by: chief590lclsc
The NFPA 1932 requires that the ladder be rated for 750 pound load rating. The D524-2 ladder is only rated for 375 pounds.
Answered by: Werner Customer Care
Date published: 2016-04-14

if the ladder has a bend in it is it still usable. are there any guidlines to follow?

Asked by: Dave B
Unfortunately in this case the ladder will need to be taken out of service. Any kind of bend in the ladder will compromise the strength and stability of it, and it can no longer be used.
Answered by: Werner Customer Care
Date published: 2016-02-04

good morning can you please give me a price for the above

Asked by: Anonymous
Pricing for all of our products must be provided through one of our Werner distributors. Please utilize the link below to locate the closest vendor in your area. http://www.wernerco.com/us/en/where-to-buy?r=20&z=16153#wtbmap
Answered by: Werner Customer Care
Date published: 2017-01-27

is there a top v rung or pole lash that will fit this ladder?

need to use ladder to trim palm fronds, need to secure top of ladder to palm trunk
Asked by: robert
The V-Rung and Pole Lash assemblies are only designed to be used with fiberglass ladders. These accessories are typically used on a utility pole, where electricty is present and aluminum ladders should not be used. The fiberglass ladders have the predrilled holes to allow for adding accessories to the top of the ladder.
Answered by: Werner Customer Care
Date published: 2015-01-19

can I purches rang lock 0nly?

one of my ladder rang lock is broken. when I push the ladder up, it locks and does not come down because of that lock. how much it coast each? Also it is very hard to push up and even harder to come down. Is there any lubricant to go up and down smooth? please advise. thanx
Asked by: Mr. Yousif
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: 2015-05-18

What is "MT" Series?

In a previous question a customer asked what the country of manufacture is? Werner answer "MT" ladders are made in Mexico. How do we know what an "MT" series ladder is? The Model is series D500. Where are the D500 Type 1AA ladders made?
Asked by: S
The MT is made in China. You can go to the following website to view the MT series ladders. http://www.wernerco.com/us/en/results?s=mt The D500 series ladders are made in Juarez, Mexico.
Answered by: Werner Customer Care
Date published: 2016-06-24

What is the country of origin?

Asked by: Frank
The MT Series of ladders are manufactured in Mexico. In recent years Werner Co. has expanded globally to become the world leader in the manufacturing and distribution of ladders, climbing equipment and ladder accessories. Werner is now available in new markets and product categories and has added manufacturing and distribution facilities in the U.S. and around the world to satisfy global demand.
Answered by: Werner Customer Care
Date published: 2016-06-23
  • y_2017, m_10, d_15, h_22CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_33
  • loc_en_US, sid_D524-2, 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.