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518-1 Extension Ladders |  - Werner Asia


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518-1 18 ft Type IA Aluminum Round Rung Straight Ladder

Performance Overview

SizeStyleReach HeightLoad Capacity
18 ftSingle Section20 ft300 lbs

The 518-1 one-section aluminum round rung 18 ft straight ladder has a duty rating of 300 pounds. The exclusive ALFLO® rung joint means TWIST-PROOF® performance every time. The side rails are extra heavy duty I-beam rails and the aluminum round rungs are deeply serrated for slip resistance.


  • Exclusive ALFLO® rung joint means TWIST-PROOF® performance
  • 1-1/4 in slip-resistant TRACTION-TRED® round rungs
  • Extra heavy duty I-beam rails
  • Heavy duty, self-aligning, free-swinging shoe with slip-resistant tread and replaceable steel spur plate
  • Hoop end caps


FeatureSize / Details
Size18 ft
Max. Open Extended Length18 ft
StyleSingle Section
Load Capacity300 lbs
Approx. Cu. Ft. Per Unit6.4
Base Width16-7/8 in
CertificationsANSI A14.2 (2007); OSHA
Flange Dimension1-1/4 in
Foot DesignHeavy duty shoe with slip-resistant tread and spur plate
Foot MaterialSlip-resistant pad
Number of Sections1
Reach Height20 ft
Rails Dimension3 in
Rung Dimension1-1/4 in
Rung TypeRound
TypeType IA Duty Rating

Package Contents

Part NumberQtyDescription



Additional 500-1 Series Models

Model No.SizeMax. Open Extended LengthLoad CapacityApprox. Cu. Ft. Per UnitBase WidthFlange Dimension
508-18 ft8 ft375 lbs2.916-7/8 in1-3/16 in
510-110 ft10 ft375 lbs3.616-7/8 in1-3/16 in
512-112 ft12 ft375 lbs4.316-7/8 in1-3/16 in
514-114 ft14 ft375 lbs516-7/8 in1-3/16 in
516-116 ft16 ft375 lbs5.716-7/8 in1-1/4 in
518-118 ft18 ft300 lbs6.416-7/8 in1-1/4 in
520-120 ft20 ft300 lbs7.116-7/8 in1-1/4 in
524-124 ft24 ft300 lbs1420-5/8 in1-3/8 in