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370 Series Aluminum Single Sided Step Ladders

>Series Callout
The 370 aluminum Step Ladders have a duty rating of 300 pounds yet are lightweight and easy to transport. The TOOL-TRA-TOP® has a drill holster, convenient tray for tools/paint and small parts. There is also a sturdy molded paint can hanger on the backside of the top. The SPILL-PROOF® pail shelf has a rag rack and holds a gallon paint can and automatically closes with the ladder. There is a full set of horizontals on the rear section and the 4', 5 ft and 6 ft models have a unique H spreader with hand grip for easy one-handed carrying and closing. The TRACTION-TRED® steps are slip resistant and double riveted.


  • Designed for one person jobs
  • Full set of rear horizontals
  • H-spreader for one-handed carry & close
  • Knee-braced top & bottom steps and horizontals
  • Paint can hanger on top
  • Slip-resistant foot pad
  • Slip-resistant Traction-Tred steps

Performance Overview

StyleSizeReach HeightLoad Capacity
Single-Sided3 ft -- 10 ft7 ft -- 14 ft300 lbs


Top DimensionFront Rails DimensionFront Flange DimensionRear Rails DimensionRear Flange DimensionSteps Dimension
5-1/8 in x 12-1/8 in3 in7/8 in1-1/4 in1 in3 in


Model No.SizeReach HeightMax. Standing HeightApprox. Product WidthApprox. SpreadApprox. Shipping Weight Lbs.Buy Online
31010 ft14 ft7 ft 8 in30 in66-1/2 in31
3733 ft7 ft1 ft17-3/4 in23-3/8 in9
3744 ft8 ft1 ft 11 in19-1/2 in29-1/2 in11
3755 ft9 ft2 ft 10 in21-1/4 in35-3/4 in13.5
3766 ft10 ft3 ft 10 in23 in41-7/8 in15.5
3788 ft12 ft5 ft 9 in26-1/2 in54-1/4 in22.5


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.