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T7400 Series Fiberglass Twin Step Ladders

Series Callout
Werner T7400 Twin Step Ladders feature a duty rating of 375 pounds per side of the ladder. Designed for one or two-person jobs, the T7400 ladders have heavy gauge aluminum tops and feature heavy duty internal spreaders to resist damage around the worksite or in transit. The GLAS*MARK® Violater stripes on the rails make the ladder more visible and the EDGE® bracing system and external rail shields add to the long lasting durability of these ladders. Fiberglass rails are non-conductive for working near electricity.


  • 4 rivets attach top to each front rail
  • Aluminum top
  • Back-up plates to reinforce top connectors
  • Designed for one or two person jobs
  • Designed for one person jobs
  • Designed for two person jobs
  • Every rivet backed up by metal plate or washer to protect fiberglass
  • Internal Spreaders
  • Molded braces
  • Rail Shields
  • Shoulder bolt and nut on top hinge
  • Slip-resistant foot pad
  • Slip-resistant Traction-Tred steps
  • Slip-resistant Traction-Tred steps all knee braced

Performance Overview

StyleSizeReach HeightLoad CapacityType
Twin Stepladder 4 ft -- 20 ft 8 ft -- 24 ft 300 lbs -- 375 lbs Type IAA Duty Rating


Top DimensionFront Rails DimensionFront Flange DimensionRear Rails DimensionRear Flange DimensionSteps Dimension
8-1/4 in x 14-1/2 in3-1/8 in1-3/16 in3-1/8 in1-3/16 in3 in


Model No.SizeReach HeightMax. Standing HeightLoad CapacityTypeApprox. Width Buy Online
T74044 ft8 ft1 ft 11 in375 lbsType IAA Duty Rating21-1/2 in
T74055 ft9 ft2 ft 10 in375 lbsType IAA Duty Rating23-1/2 in
T74066 ft10 ft3 ft 10 in375 lbsType IAA Duty Rating25 in
T74088 ft12 ft5 ft 9 in375 lbsType IAA Duty Rating28-3/4 in
T741010 ft14 ft7 ft 8 in375 lbsType IAA Duty Rating32 in
T741212 ft16 ft9 ft 7 in375 lbsType IAA Duty Rating35-1/2 in
T741414 ft18 ft11 ft 6 in300 lbsType IA Duty Rating39 in
T741616 ft20 ft13 ft 5 in300 lbsType IA Duty Rating42-1/2 in
T741818 ft22 ft15 ft 4 in300 lbsType IA Duty Rating46 in
T742020 ft24 ft17 ft 3 in300 lbsType IA Duty Rating49-1/2 in

Type IAA duty rating is for stepladders up to 12 ft. Designed for one or two person jobs. Note: When used as a double stepladder, the maximum load per side, including person and materials, shall not exceed the duty rating of ladder


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.