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Products > Climbing-Equipment > Extension Ladders > D500-2 Series > D540-2 40ft Type IA Aluminum D-Rung Extension Ladder

D536-2_PI D540-2



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D540-2 40ft Type IA Aluminum D-Rung Extension Ladder

Performance Overview

SizeStyleReach HeightLoad CapacityTypePerformance Rating
40ftMulti Section37ft300 lbsType IA Duty Rating

The D540-2 40ft aluminum extension ladders have a duty rating of 300 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 375 pounds for 20ft-32ft models.


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-3/4in 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 double pulley pulley design with 3/8in 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
Reach Height37ft
Max Working Length35ft
Extended Length35ft
StyleMulti Section
Load Capacity300 lbs
TypeType IA Duty Rating
Performance Rating
Rung TypeD
Foot MaterialSlip-resistant pad
Number of Sections2
Base Width19-1/8in outside Shoes
CertificationsANSI A14.2 (2007); OSHA
Approx. Cu. Ft. Per Unit17
Approx. Shipping Wt. Lbs.99.5


Rails Dimension3-1/4in
Flange Dimension1-1/4in
Rung Dimension1-3/4in
Fly Width16-15/16in

Additional D500-2 Series Models

Model No.SizeReach HeightMax Working LengthExtended LengthLoad CapacityType
D520-220ft20ft17ft17ft375 lbsType IAA Duty Rating
D524-224ft23ft21ft21ft375 lbsType IAA Duty Rating
D528-228ft27ft25ft25ft375 lbsType IAA Duty Rating
D532-232ft31ft29ft29ft375 lbsType IAA Duty Rating
D536-236ft34ft32ft32ft300 lbsType IA Duty Rating
D540-240ft37ft35ft35ft300 lbsType IA Duty Rating
D544-244ft41ft39ft39ft300 lbsType IA Duty Rating
D548-248ft45ft43ft43ft300 lbsType IA Duty Rating

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.

Performance Overview

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Dimensions Overview

To ensure you choose the product best suited to your needs, you should follow the Werner Safety Tips.

Specifications Overview

To ensure you choose the product best suited to your needs, you should follow the Werner Safety Tips.