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5220K Extension Ladders - Keller US
5220K Extension Ladders - Keller US


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5220K 20ft Type IAA Fiberglass D-Rung Extension Ladder


SizeStyleApprox. Closed LengthReach HeightLoad Capacity
20ftMulti Section120in19ft350lb

The 5220K extension ladder boasts a duty rating of 375 pounds and features the exclusive 3-piece rung-to-rail connection that guarantees twist-proof peformance. External guides at top of base section help secure the interlocking siderails. 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 D rung steps are slip resistant and the durable rail shield and shoe bracket protects the rail from damage.


  • Exclusive 3-piece rung-to-rail connection means twist-proof performance
  • 1-1/4in slip-resistant D-rung steps
  • 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
  • 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


FeatureSize / Details
Max. Safe Working Height17ft
Max. Open Extended Length17ft
StyleMulti Section
Load Capacity350lb
Duty RatingType IAA Duty Rating
Rung TypeD-Rung
Foot MaterialSlip-resistant pad
Foot DesignHeavy duty shoe with slip-resistant tread and spur plate
Section x Rungs2 x 10
Number of Sections2
Base Width19in
CertificationsANSI A14.5 (2007); OSHA
Max. Load375lb
Approx. Closed Length120in
Reach Height19ft
Approx. Shipping Weight (lb)50
Approx. Product Weight (lb)50
Approx. Cu. Ft. Per Unit8.7

Package Contents

Part NumberQtyDescription


Rails Dimension3-5/16in
Flange Dimension1-3/16in
Rung Dimension15in x 1-5/8in
Fly Width16-1/8in

Additional 5200K Series Models

Model No.SizeMax. Safe Working HeightMax. Open Extended LengthLoad CapacityDuty RatingSection x Rungs
5216K16ft13ft13ft350lbType IAA Duty Rating2 x 8
5220K20ft17ft17ft350lbType IAA Duty Rating2 x 10
5224K24ft21ft21ft350lbType IAA Duty Rating2 x 12
5228K28ft25ft25ft350lbType IAA Duty Rating2 x 14
5232K32ft29ft29ft350lbType IAA Duty Rating2 x 16
5236K36ft32ft32ft300lbType IA Duty Rating2 x 18
5240K40ft35ft35ft300lbType IA Duty Rating2 x 20

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 reach 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.

Performance system
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.