Stromberg Carlson makes two different types of auxiliary RV ladder: a four-tread bunk ladder for climbing into an interior sleeping area, and the LA-2022152 three-tread starter ladder that attaches temporarily to a compatible exterior roof-access ladder. They have different hooks, fasteners and installation instructions.
Compare the model label and attachment method before ordering. A bunk ladder is not a removable exterior ladder extension, even though both have similar-looking aluminum rails and molded treads.
Bunk ladder or starter ladder?
| Exact model | Installed use | Factory length | Treads | Attachment and capacity |
|---|---|---|---|---|
|
LA-2021460 (silver) LA-2021460B (black) |
Interior bunk access | 60 in | 4 | Upper hooks or included mounting brackets; max 250 lb at manufacturer's 11° mounting angle |
|
LA-2021466 (silver) LA-2021466B (black) |
Interior bunk access | 66 in | 4 | Upper hooks or included mounting brackets; max 250 lb at manufacturer's 11° mounting angle |
| LA-2022152 | Temporary exterior roof-ladder starter section | 51½ in | 3 | Locking cage pins around existing ladder; both feet on ground, 10°–13° angle, max 250 lb |
The bunk-ladder tubes can be shortened to suit some lower bunk heights, following the factory trim instructions. The starter ladder is intended to be removed before driving and must never be used vertically without its locking pins.
Bunk ladder exploded assembly and hook placement
The illustrated instructions identify the two upright tubes, molded treads, hook pair, optional bunk brackets and tread fasteners. Pay special attention to the mounting direction of the hooks and the orientation of each tread when assembling the ladder.
The original bunk ladder assembly illustration opens as a PDF with zoomable tread, hook and bracket details.
Open original manufacturer illustration (PDF)LA-2022152 starter ladder assembly and secure attachment
The starter ladder extends downward from a compatible exterior ladder while the RV is parked. Its two locking cage pins must engage around the existing ladder, its hinged top brackets must be secure, and both rubber-tipped legs must reach the ground.
Open the manufacturer's starter-ladder drawing to enlarge the locking-cage-pin arrangement and recommended lean angle.
Open original manufacturer illustration (PDF)Do not travel with the removable starter ladder attached. Check its locking pins before each use, and keep both feet on firm level ground. This extension is designed to work with LA-401 and LA-401BA exterior ladders, or other ladders that meet the manufacturer's actual attachment dimensions.
Manufacturer replacement-component identification
Stromberg Carlson's parts illustrations separate the small hardware for the two families. These components are shown here to help identify what is worn or missing; the complete ladders linked below are sold separately from individual service parts.
| Manufacturer part | Component | Relevant ladder family |
|---|---|---|
| 8532-RB | Rubber foot for 1-inch-diameter ladder tube | LA-2021460 / 1466 bunk and LA-2022152 starter |
| 2150 | Mounting and assembly hardware kit | LA-2021460 and LA-2021466 bunk ladders, including their listed finish versions |
| 2151 | Attachment and assembly hardware kit | LA-2022152 starter ladder only |
| Molded replacement tread | Replacement tread matching the correct ladder generation | Verify the exact current part code and original tread style with Stromberg Carlson before ordering |
Replacement hardware and tread styles should be matched to the complete original model. For illustrations of the individual feet, treads and hardware kits, see the 2026 Stromberg Carlson parts catalog, printed page 20.
Shop the exact bunk and starter ladder models
The three listings below are complete ladder assemblies. Select the correct length and intended location before ordering.
For service components not listed for sale on NewRVParts, use the original manufacturer model identifier when asking about a replacement. You can also compare the manufacturer's bunk-ladder service parts and starter ladder specifications.
For the fixed rear ladder and its standoff, hinge or rung replacements, see our LA-401 exterior RV ladder parts diagram, or return to the RV parts diagram index.