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Products > Climbing-Equipment > Stepladders > T370 Series > T378 8ft Type IA Aluminum Twin Ladder

T378_PI T378 T370_FI_ALSTP T378 T370_FI_Foota T378 T370_FI_Footb T378



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T378 8ft Type IA Aluminum Twin Ladder

Performance Overview

StyleSizeReach HeightLoad CapacityTypePerformance Rating
Twin8ft12ft300 lbsType IA Duty Rating

The T378 Aluminum Multi-use Twin 8ft Step Ladder has a large aluminum extruded top and features a duty rating of 300 pounds per side making these ladders ideal for one or two-person jobs. The slip-resistant TRACTION-TRED® steps on the front and rear sections are all double riveted. Heavy duty aluminum brackets hold the slip-resistant foot pads.


  • Twin sided ladder design for one or two-person jobs
  • Maximum load per side, including person and materials, shall not exceed duty rating of ladder
  • Large aluminum extruded top with thick side plates
  • Slip-resistant TRACTION-TRED® steps on front and rear sections
  • Heavy duty internal spreaders
  • Step braces on top step and bottom three steps
  • Heavy duty aluminum foot bracket with slip-resistant foot pad


FeatureSize / Details
Reach Height12ft
Max. Standing Height5ft 9in
Load Capacity300 lbs
TypeType IA Duty Rating
Performance Rating
Approx. Width28-1/4in
Approx. Spread64in
With Pail ShelfNo
Spreader MaterialAluminum
CertificationsANSI A14.2 (2007); OSHA
Approx. Cu. Ft. Per Unit8.2
Approx. Shipping Wt. Lbs.31


Top Dimension8-1/4in x 14in
Front Rails Dimension3in
Front Flange Dimension7/8in
Rear Rails Dimension3in
Rear Flange Dimension7/8in
Steps Dimension3in

Additional T370 Series Models

Model No.SizeReach HeightMax. Standing HeightApprox. WidthApprox. SpreadApprox. Cu. Ft. Per Unit
T31010ft14ft7ft 9in31-3/4in78in11.1
T3744ft8ft1ft 11in21-1/4in36in3.5
T3766ft10ft3ft 10in24-3/4in50in5.7
T3788ft12ft5ft 9in28-1/4in64in8.2

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.

Performance Overview

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Dimensions Overview

To ensure you choose the product best suited to your needs, you should follow the Werner Safety Tips.

Specifications Overview

To ensure you choose the product best suited to your needs, you should follow the Werner Safety Tips.