LadderCageEngineer-Written · 6-Minute Read
Cage Ladder Selection Guide
Six decisions pick the right caged ladder: the height rule in your market, the climb frequency, the material, the loads, the exit, and the paperwork. Get them wrong in order and you buy twice. This guide walks each decision with the exact numbers our shop builds to.
The 6 decisions on one card
- 1Height rule by market - OSHA 24 ft / EN 3 m / AS 1657 3 m
- 2Climb frequency & exit - walk-through vs side-step
- 3Material & environment - HDG / painted / SS304 / SS316
- 4Loads & dimensions - Φ20 rung @ 280, cage Φ700, 1.5 kN
- 5Accessories - platforms, gates, wells, guards
- 6Documentation - DoC + MTC 3.1 + weld + HDG records
Decision 1 & 2
Start With the Height Rule of Your Market
The same physical ladder can be compliant in Manchester and illegal in Houston. Fix the governing code before anything else - it decides whether you need a cage at all, and whether a cage is even allowed.
| Market | Code | Cage Trigger | Watch-Out |
|---|---|---|---|
| United States | OSHA 1910.23 / 1910.28 | 24 ft (7.3 m) - pre-2018 installs | New installs after 19 Nov 2018 need a ladder safety or fall-arrest system; existing cages run to 18 Nov 2036. OSHA proposed revoking the update in Sept 2025 - confirm before you spec. |
| Europe / EN markets | EN ISO 14122-4:2016 | 3.0 m climb | System above 10 m needs rest platforms (interval up to 6 m); hoop pitch max 1500 mm. |
| Australia | AS 1657:2018 | 3 m climb | Ask for the AS 1657 conformity statement on the DoC. |
| UK-spec projects | BS 4211:2005+A1 | Caged access spec | Often written alongside EN ISO 14122-4 - state which governs. |
| Singapore | WSH (WAH) Regs 2013 | Caged access above height | Climbs above 9 m: landings at max 9 m spacing. |
Climb once a week → side-step exit
Occasional maintenance access. Side exit onto a platform with a separate handhold above the landing. Cheapest compliant layout.
Climb daily → walk-through exit
Frequent roof or tank access. Exit forward through guardrails, both hands on rails, never turning on the rung. Our walk-through exit sets run $90-$250.
Decision 3
Material: Buy the Environment, Not the Metal
The atmosphere around the ladder picks the material. Price follows: hot-dip galvanized Q235B starts at $95 per meter of climb, SS304 at about 1.8x, SS316 at about 2.5x.
| Environment | Spec | Why |
|---|---|---|
| Dry inland, general industrial | Q235B + HDG (85-100 μm, ISO 1461) | Default spec; decades of life for the lowest cost per meter. |
| Indoor, budget, repaintable | Q235B painted | Upfront savings where rain never hits it; repaint on schedule. |
| Outdoor, humid, polluted | SS304 | ≈1.8x HDG price; no coating to scratch during installation. |
| Coastal, pool chlorine, chemical mist | SS316 | ≈2.5x HDG price; molybdenum resists chlorides that pit 304. |
| Weight-sensitive / non-magnetic | Aluminium | Ask for a engineered quote - cage hoops change section. |
Decisions 4-6
Dimensions, Accessories, Paperwork
These are the numbers that separate a compliant caged ladder from a cheap one that photographs well.
Geometry we build to
- · Rungs Φ20 mm at 280 mm pitch
- · Stile width 500 mm
- · Cage diameter Φ700 mm
- · Hoops 40×5 mm, pitch ≤1500 mm
- · Straps 30×3 mm vertical ties
- · Cages fitted from 2.2 m climb
Loads & limits
- · 1.5 kN per rung, verified in QC
- · 14 m max single piece
- · Above 10 m (EN): platforms ≤6 m apart
- · Above 9 m (Singapore): landings ≤9 m
- · Platforms $150-$400 each
- · Gates $60-$180 · exit sets $90-$250
Paperwork that ships free
- · Declaration of Conformity
- · EN 10204 3.1 Mill Test Certificate
- · Weld inspection per ISO 5817 Level C
- · HDG report per ISO 1461 (85-100 μm)
- · Trial-assembly photos before dispatch
- · All records retained 10 years
Evidence
The Inspector's 6-Point Walkaround
Before you accept any caged ladder - ours or anyone's - an inspector checks these six things first. They are the fastest tells of a build that will pass or fail.
1. Hoop pitch with a tape. Anything beyond 1500 mm gaps the EN spec and hands the climber a long unprotected fall window. Measure center-to-center, not edge-to-edge - vendors cheat with edge measurements.
2. Strap welds at the stiles. The 30×3 straps carry hoop loads into the ladder. Look for full-length fillets per ISO 5817 Level C, not tack welds that crack under vibration.
3. Rung deflection under load. Every rung is proofed to 1.5 kN in our shop. On site, stand-bounce the third rung from the bottom - permanent set means the section is under-built.
4. HDG at the cut ends. Coating thickness is measured where steel was cut or drilled after galvanizing - 85-100 μm per ISO 1461 should still read at repairs, or the touch-up was skipped.
5. MTC type on paper. A "material certificate 2.1" is a declaration; an EN 10204 3.1 MTC is mill-tested chemistry with a stampable trail. Specifications increasingly write 3.1 explicitly - check the document, not the invoice line.
6. Cage-to-platform handhold. The top hoop should place the climber's hands level with the platform edge on the final step - the moment most falls happen. Trial-assembly photos in your document pack show this joint before you ever receive the ladder.
Decision Block
Cage Ladder Selection Table
Eight common jobs and the spec that wins each. If your job is not here, the form below goes straight to an engineer.
| Your Job | Spec That Wins | Budget Marker |
|---|---|---|
| US roof hatch, pre-2018 building, 6 m | HDG caged, side-step, hoop ≤1500 | $600-$900 ex-works + $280-$550 sea |
| New US install above 24 ft | Ladder with fall-arrest interface - confirm rule status first | Ask - config depends on OSHA rule in force |
| EU water tank, 8 m, weekly | HDG + walk-through + EN 14122-4 file | ≈$760/m-set + exit set $90-$250 |
| Coastal pump station, 5 m | SS316 caged, 316 hardware | ≈2.5x HDG per meter |
| Chemical plant, 11 m | SS316 + platform at 6 m + gate | 2.5x + platform $150-$400 + gate $60-$180 |
| Silo battery, 16 m, daily | HDG, spliced sections + 2 platforms + walk-through | Engineered quote in 24 h |
| Singapore rooftop, 10 m | HDG + landing within 9 m rule + WAH docs | Engineered quote in 24 h |
| Warehouse wall, 3.5 m, rare | HDG caged from 2.2 m, side-step | From ≈$95/m × climb |
Traps
5 Selection Mistakes That Cost a Reorder
Specifying a cage for a new US ladder above 24 ft. Since 19 Nov 2018 a cage alone does not comply for new installs - a ladder safety or fall-arrest system is required (existing caged ladders are grandfathered to 18 Nov 2036, and OSHA's Sept 2025 proposed revocation may yet change this). Confirm the rule status with us before the PO; the fix is configuration, not price.
Under-specifying the material for the atmosphere. SS304 by a pool or at the coast pits within years. The 304→316 delta is about 0.7x of HDG price; a replacement ladder plus downtime is several times that.
Skipping rest platforms on long climbs. Above 10 m EN ISO 14122-4 requires platforms (≤6 m intervals); above 9 m Singapore requires landings ≤9 m apart. A 16 m continuous cage is non-compliant in both markets no matter how strong it is.
Deciding the top exit after ordering. Walk-through vs side-step changes the top hoops, platform cutouts and guardrail set. It is a drawing-stage decision; retrofitting on site means welding on galvanized steel.
Comparing per-meter prices without the geometry. Two "caged ladders at $95/m" differ entirely if one spaces hoops at 1500 mm with 40×5 hoops and the other stretches to 2000 mm with 30×4. Ask for hoop section and pitch on the quote - it is on ours, line by line.
Cage Ladder Selection FAQ
What happens after you submit
No sales script. Your numbers go to an engineer who has built caged ladders since 2004.
Engineer Reply in 4 Working Hours
Someone who knows hoop pitch from strap section reviews your request within 4 working hours.
Itemized Quote in 24 Hours
Material + fabrication + HDG + packaging, line by line — ex-works from $95/m in Q235B HDG.
Production in 15–25 Working Days
Five-stage QC ends with trial assembly and photo records kept 10 years.
Request your selection quote
5 fields - that is all we need to start.