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T812 Step Ladders - Keller US
T812 Step Ladders - Keller US


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T812 12ft Type IAA Aluminum Twin Ladder


StyleSizeReach HeightLoad CapacityMax. Load
Twin Stepladder12ft16ft375lb375lb

The T812 Aluminum Multi-use Twin 12ft Step Ladder has a duty rating of 375lb per side making the T812 ladder is ideal for one or two-person jobs. The top is made of heavy gauge extruded aluminum.  The extra wide steps are slip-resistant and are connected with a solid double riveted construction.  The bottom steps are braced with full U channel knee braces.


  • Thick side plates
  • Heavy gauge aluminum extruded top
  • Shoulder bolt and lock nut on top hinge; 4 solid aluminum rivets attach top to each rail
  • Solid double riveted construction
  • Heavy duty external aluminum spreaders on 4ft and 6ft models; internal spreaders on 8 ft, 10ft and 12ft
  • Extra wide slip-resistant steps
  • Full U-channel bracing on bottom steps
  • Slip-resistant foot pad
  • Design for one or two-person jobs
  • Maximum load per side, including person and materials, shall not exceed duty rating of ladder


FeatureSize / Details
StyleTwin Stepladder
Max. Safe Working Height9ft 7in
Reach Height16ft
Max. Standing Height9ft 7in
Load Capacity375lb
Duty RatingType IAA Duty Rating
Approx. Cu. Ft. Per Unit25
Approx. Product Weight (lb)69
Approx. Shipping Weight (lb)69
Approx. Spread92-1/4in
CertificationsANSI A14.2 (2007); OSHA
Front Flange Dimension1-1/8in
Front Rails Dimension3-1/8in
Max. Load375lb
Approx. Product Height144in
Approx. Product Width35-1/4in
Rear Flange Dimension1-1/8in
Rear Rails Dimension3-1/8in
Top Dimension8-1/4in x 14in
Steps/Rung Dimension3in

Package Contents

Part NumberQtyDescription



Additional T800 Series Models

Model No.SizeMax. Safe Working HeightReach HeightMax. Standing HeightApprox. Cu. Ft. Per UnitApprox. Product Weight (lb)
T8044ft1ft 11in8ft1ft 11in521.5
T8066ft3ft 10in10ft3ft 10in8.831
T8088ft5ft 9in12ft5ft 9in13.342
T81010ft7ft 8in14ft7ft 8in18.755
T81212ft9ft 7in16ft9ft 7in2569

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 reach 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.

Performance system
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.