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Products > Climbing-Equipment > Extension Ladders > D500-2 Series > D520-2 20 ft Type IAA Aluminum D-Rung Extension Ladder > D520-2

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D520-2 Extension Ladders |  - Werner Asia


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D520-2 20 ft Type IAA Aluminum D-Rung Extension Ladder

Performance Overview

SizeStyleReach HeightLoad Capacity
20 ftMulti Section20 ft375 lbs

The D520-2 20 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.


  • 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
  • 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


FeatureSize / Details
Size20 ft
Load Capacity375 lbs
TypeType IAA Duty Rating
StyleMulti Section
Max. Open Extended Length17 ft
Number of Sections2
Foot DesignHeavy duty shoe with slip-resistant tread and spur plate
Foot MaterialSlip-resistant pad
Approx. Cu. Ft. Per Unit8.8
Rails Dimension3-1/4 in
Base Width19-1/8 in outside Shoes
Fly Width16-7/8 in
Flange Dimension1-3/16 in
CertificationsANSI A14.2 (2007); OSHA
Reach Height20 ft
Rung Dimension1-3/4 in
Rung TypeD-Rung

Package Contents

Part NumberQtyDescription



Additional D500-2 Series Models

Model No.SizeLoad CapacityTypeMax. Open Extended LengthApprox. Cu. Ft. Per UnitBase Width
D520-220 ft375 lbsType IAA Duty Rating17 ft8.819-1/8 in outside Shoes
D524-224 ft375 lbsType IAA Duty Rating21 ft10.419-1/8 in outside Shoes
D528-228 ft375 lbsType IAA Duty Rating25 ft12.119-1/8 in outside Shoes
D532-232 ft375 lbsType IAA Duty Rating29 ft13.819-1/8 in outside Shoes
D536-236 ft300 lbsType IA Duty Rating32 ft15.419-1/8 in outside Shoes
D540-240 ft300 lbsType IA Duty Rating35 ft1719-1/8 in outside Shoes
D544-244 ft300 lbsType IA Duty Rating39 ft21.420-1/8 in
D548-248 ft300 lbsType IA Duty Rating43 ft23.320-1/8 in