Retrofit Safety Cage · OSHA 1910.28 / EN ISO 14122-4
Ladder Safety Cage System
A bolt-on safety cage that upgrades an existing fixed ladder — no ladder replacement. Welded from Q235B or SS304 in our Shijiazhuang factory, then load-tested batch by batch.
Gallery
Warehouse run
Heavy industry
Industrial plant
Facade access
Product Overview
What Is a Ladder Safety Cage System?
A ladder safety cage system is a hooped guard that wraps a fixed vertical ladder. It catches a climber who slips backward on a tall run. Ours is built to retrofit — the hoops and vertical bars bolt onto a ladder you already own.
This is not a whole new ladder. Where our Caged Roof Access Ladder ships as one welded unit, this system is the cage on its own. You keep the existing stringers and rungs, and we add the cage for compliance or a safety upgrade. That keeps cost and downtime low.
We sell straight from the plant. Every order leaves with material certificates, weld reports, and load-test data. ISO 9001:2015 has governed our shop since 2003, and we welcome factory audits.
Safety cage detail — hooped guard with vertical bars
Technical Specifications
Specs & Materials: Q235B, SS304 & SS316 Safety Ladder Cage
Cage components
Hoops, vertical bars, bolt-on brackets
Retrofit geometry — bolts onto your existing ladder
We set the cage to the governing code and to your ladder's actual width. Send a few photos and the rung pitch. Our engineers return a bolt-on layout that fits.
| Parameter | Value |
|---|---|
| Install type | Bolt-on retrofit (cage only) |
| Cage material | Q235B carbon steel; SS304 / SS316 stainless |
| Corrosion protection | Hot-dip galvanized ~85 µm (carbon) |
| Hoop spacing | ≤ 1500 mm (EN ISO 14122-4) |
| Vertical bar spacing | ≤ 300 mm |
| Cage clear width | ≥ 400 mm |
| Cage start height | 2100–2400 mm above landing |
| Rung point load | |
| Bracket fixing | Bolted clamps to existing stringers; no hot work |
| Batch testing | Sample tensile test per batch; report supplied |
Retrofit Installation
Retrofit Installation: Bolt-On Cage for an Existing Ladder
Cage retrofit on a process tank
Representative project — details
1. Survey the existing ladder
We start from photos and a few measurements — rung pitch, stringer width, climb height. No site visit needed for the quote.
2. Match hoops to your width
Hoops are rolled to suit your ladder. Clear width stays at or above 400 mm, so the cage feels open, not tight.
3. Bolt-on brackets, no hot work
Brackets clamp to the stringers. On galvanized or in-service ladders, bolting avoids welding sparks and re-coating.
4. Fit the vertical bars
Vertical bars space at 300 mm or less. They tie the hoops together and stop a climber slipping between rings.
5. Torque and check
Every bolt is torqued to spec. We supply a check sheet, so your crew can sign off the install on site.
6. Documents on handover
Material certificates, weld reports, and batch load-test data ship with the cage. Third-party inspection (SGS or TÜV) is available on request.
Standards & Compliance
OSHA Ladder Cage Compliance: OSHA 1910.28 & EN ISO 14122-4
Cage start height
OSHA 1910.28 and EN ISO 14122-4 set where the cage begins above the landing — typically 2.1–2.4 m.
Hoop & bar spacing
EN ISO 14122-4 keeps hoops ≤ 1.5 m apart. Vertical bars sit ≤ 300 mm apart around the ring.
Clear width
Clear width stays ≥ 400 mm, so the cage guides a fall without trapping the climber.
OSHA 1910.28 phase-out
On new US fixed ladders over 24 ft, OSHA now favors a ladder safety system over a cage. Cages still serve existing ladders and non-US codes.
Cage Family
Related Caged Ladder Systems
Caged Roof Access Ladder
The full welded version — ladder and cage as one unit, for new roof and tank runs.
Fixed Ladder Safety System
Rail-and-glider fall arrest, used where OSHA rules out a cage on a new tall ladder.
Vertical Fixed Access Ladder
The base fixed ladder you can retrofit this cage onto, in Q235B or stainless.
FAQ
Frequently Asked Questions
Get Factory-Direct Retrofit Cage Pricing & Lead Time
Send the climb height, the ladder width, and the governing standard. Our engineers return a bolt-on layout, a cage-compliance note, and factory-direct pricing — usually within one working day.