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500-1 Series Aluminum Single Section Extension Ladders

>Series Callout
The 500-1 series are one-section round rung straight ladders with a duty rating of 375 lbs. 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. The duty rating goes to 300 lbs with the 18 ft, 20 ft and 24 ft lengths.


    Performance Overview

    SizeStyleReach HeightLoad Capacity
    8 ft -- 24 ftSingle Section11 ft -- 26 ft300 lbs -- 375 lbs



    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

    Type IAA duty rating is for single ladders up to 16 ft