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Products > Climbing-Equipment > Stepladders > P370 Series > P373 3 ft Type IA Aluminum Platform Ladder > P373

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P373 3 ft Type IA Aluminum Platform Ladder

Performance Overview

StyleSizeReach HeightLoad Capacity
Platform3 ft9 ft300 lbs

The P373 Aluminum 3 ft Platform Ladder has a duty rating of 300 pounds and features a safety guard rail to encourage proper use. The large platform provides a secure and comfortable work area. The slip-resistant TRACTION-TRED® steps are double riveted. A full set of rear horizontals are spaced one foot apart. The heavy duty aluminum foot bracket secures the slip-resistant foot pad and protects the bottom of the rail.


  • Safety guard rail encourages proper ladder use
  • Large platform provides secure and comfortable work area
  • Slip-resistant TRACTION-TRED® steps are double riveted
  • Step braces on top and bottom step
  • Full set of rear horizontals spaced one per foot
  • Heavy duty aluminum foot bracket with slip-resistant foot pad
  • Double-braced bottom 3 steps


FeatureSize / Details
Size3 ft
Height to Platform3 ft
Reach Height9 ft
Platform Width12-5/8 in x 18 in
Max. Standing Height2 ft 10 in
Load Capacity300 lbs
Approx. Product Width23 in
CertificationsANSI A14.2 (2007); OSHA
Approx. Spread36-1/4 in
Platform Depth12-5/8 in x 18 in
Approx. Overall Ladder Length (Closed)5 ft
Approx. Shipping Weight Lbs.14.5
Approx. Cu. Ft. Per Unit3.9
Description of Top FeaturesCan Hook
Performance Rating

Package Contents

Part NumberQtyDescription


Front Rails Dimension3 in
Front Flange Dimension7/8 in
Rear Rails Dimension1-1/4 in
Rear Flange Dimension1 in
Steps Dimension3 in

Additional P370 Series Models

Model No.SizeHeight to PlatformReach HeightMax. Standing HeightApprox. Product WidthApprox. SpreadBuy Online
P3722 ft2 ft8 ft1 ft 11 in21-1/4 in30 in
P3733 ft3 ft9 ft2 ft 10 in23 in36-1/4 in
P3744 ft4 ft10 ft3 ft 10 in24-3/4 in42-3/4 in
P3766 ft6 ft12 ft5 ft 9 in28-1/4 in54-3/4 in
P3788 ft8 ft14 ft7 ft 8 in31-3/4 in67 in

Is there an add-on shelf for the P373?

Is there an add-on shelf that I can install at the top of the P373 platform ladder?
Asked by: catalert
We do not offer a shelf for this model
Answered by: Werner Customer Care
Date published: 2017-03-01

What does the P374 weigh?

Why would you publish the shipping weight, but not the actual weight of the ladder? I don't care how much weight the delivery guy is carrying around. I care about how much I have to carry around the house. This goes for all your ladders. I'm trying to compare weight since that is an important factor to me, but of the 7 I clicked on, not one listed the actual weight of the ladder, only the shipping weight.
Asked by: Insufficient Information
The 17lb listed shipping weight of this ladder is the actual weight of the ladder.
Answered by: Werner Customer Care
Date published: 2016-09-09

if the black plastic sections were removed from the ladder, would that do anything to the OSHA rateing?

Asked by: Missy
No modifications should ever be made to the ladder. It would not be safe and not in OSHA compliance.
Answered by: Werner Customer Care
Date published: 2016-10-14

How much the P373 weight

please provide the lightest material offered I have the 265 ladder for 20 yrs it is one of my favorite items Is the P373 the replacement I'm concern about weight carrying it around the apt
Asked by: buster
We still manufacture the 265 aluminum platform ladder. This is a 5ft aluminum platform ladder. The 265 weighs 15lbs and has a duty rating of 200lbs. The P373 is a 3ft platform ladder with a duty rating of 300lbs. The P373 weighs 14.5lbs
Answered by: Werner Customer Care
Date published: 2015-07-20

How many inches is it from the top of the platform to the top of the top rail?

Asked by: Anonymous
Answered by: Werner Customer Care
Date published: 2017-03-03

What are the folded dimensions?

My concern is amount of space to store the ladder
Asked by: Anonymous
When this ladder is folded down to be stored it would stand at 8ft. The width is 28 1/4". The thickness would be 5 1/4".
Answered by: Werner Customer Care
Date published: 2014-11-25


For the P378, you can add casters. Part number 40-2HD comes with two casters. You will need to order two each of 40-2HD to get four casters.
Answered by: Werner Customer Care
Date published: 2016-07-07
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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.