LadderCageCage Ladder Standard Dimensions
Cage Ladder Standard Dimensions
Cage ladder dimensions — 19.7 in (500 mm) clear width, 10–14 in rung spacing, 337 lb rated. Free dimension sheet and quote; custom sizes at factory price.
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Key Sizes at a Glance
Cage Ladder Dimensions - Key Sizes
The three numbers that matter most for a compliant cage ladder: clear width, rung spacing and load rating.
19.7 in Clear Width
500 mm clear width inside the cage — the standard OSHA / ANSI enclosure dimension.
10–14 in Rung Spacing
280 mm (11 in) rung spacing, within the OSHA 1910.23 / ANSI A14.3 range.
337 lb Rated
1.5 kN per rung rating for a single concentrated load.
Rung Spacing & Full Dimensions
Cage Ladder Rung Spacing
Rung spacing is the most inspected dimension on a cage ladder. We hold 280 mm (about 11 in) as standard — comfortable to climb and inside every major standard.
- 280 mm Rung Pitch
Consistent, comfortable and code-compliant
- 500 mm Clear Width
Full 19.7 in (500 mm) enclosure for the climber
- Φ700 mm Cage
Hoops 40×5 @≤1500, straps 30×3
| Specification | Value |
|---|---|
| Rung Diameter | Φ20 mm |
| Rung Spacing | 280 mm (≤300 mm / 10–14 in) |
| Clear Width | 500 mm (19.7 in) |
| Cage Diameter | Φ700 mm (hoops 40×5 @≤1500, straps 30×3) |
| Cage Start | 2.2 m above floor |
| Load Rating | 1.5 kN per rung (337 lb) |
| Entrance | Flared / flared splay entry |
| Standards | OSHA 1910.28 · EN ISO 14122-4 · BS 4211 |
Multi-Standard Compliance
Compliance (OSHA 1910.23 / ANSI A14.3 / EN ISO 14122-4)
OSHA 1910.23
Fixed ladder cage, clear width and rung spacing per OSHA general industry rules.
ANSI A14.3
American National Standard for ladders — fixed safety requirements.
EN ISO 14122-4
European standard for permanent means of access — machinery and buildings.
DoC and MTC 3.1 ship with every order at no extra cost.
Get My Dimension SheetCustom Sizes at Factory Price
Custom Sizes & Free Dimension Sheet
Standard dimensions cover most projects — but every site is different. Custom heights, widths and materials are built to your drawing at factory-direct prices.
- Free Dimension Sheet
Standard dimension sheet sent free with every quote
- Custom Heights & Widths
Any height to 25 m single run, custom clear width on request
- Factory-Direct Price
No distributor markup on custom work
Get a Free Dimension Sheet
Get My Cage Ladder Dimension Sheet
Free dimension sheet and itemized quote within 24 hours, with custom sizes at factory-direct prices.
- Free dimension sheet
- Custom sizes at factory price
- 24h itemized quote
- DoC & MTC included
Dimensions That Plan Your Site, Not Just the Ladder
Drawing dims decide more than the ladder — they fix the space you reserve around it.
Start with the climbing line. A wall-mounted ladder stands 200 mm off the face on 8 mm brackets at 1800 mm centres, so reserve that standoff plus boot depth along the climb. Around it, the 700 mm cage circle governs clearance: nothing may encroach inside that hoop — or the flared entry zone at its base — or the enclosure is no longer compliant. Clear width between stringers is 500 mm and rungs are 20 mm bar at 280 mm centres — together the climb rhythm inspectors check against OSHA 1910.23 and EN ISO 14122-4.
Height dimensions carry the compliance load. The cage begins at 2.2 m in our build — below the 3 m EN ISO 14122-4 and AS 1657 thresholds — and tall systems add a rest platform every 6 m. At the top, allow for the handrail extension above the last rung and the step-across to your roof or platform edge; both are dimensioned on the elevation view, not improvised in the field.
Finally, plan for the steel before it is a ladder: a single hot-dip galvanized piece runs up to 14 m, so confirm access for a crate of that length plus staging room for hoops, straps and brackets at the wall. Getting these clearances right on paper is why our drawing set dimensions the surrounding structure, not only the product.
Where Dimension Projects Actually Go Wrong
Measure Twice, Order Once — the Field Check
A ladder built to the wrong number is scrap steel at 6 m of height. The six measurements every order needs, and the four measuring habits that generate rework.
Six numbers we need from you
- Climb height — finished floor to top rung or landing edge, in millimetres
- Wall build-up — material and thickness behind every bracket position
- Cage envelope clearance — anything intruding within the Φ700 mm cage circle along the climb
- Anchor substrate — concrete grade or steel plate, which decides the M12 anchor plan
- Top exit condition — walk-through, step-across or landing platform, with handrail extents
- Rest-platform positions — where landings can tie into structure at the standard's intervals
Four measuring habits to stop
- Rounding to the nearest 100 mm — rungs at 280 mm centres expose every rounded edge
- Measuring from grade when the finished floor goes on top — quote from the finished surface
- Assuming the wall is plumb — standoff at 200 mm needs the deviation measured, not hoped for
- Ignoring the 14 m single-piece limit — anything longer needs splice positions planned before ordering
Send your tape numbers and two photos to sales@dtsteelladder.com — we dimension-check them against the drawing before anything is cut. The check is free.
Numbers That Survive an Inspection
What a Dimensioned Factory Drawing Gets You
Dimensions are the difference between a product and a liability. Five rows of what ours are engineered to deliver.
| Feature | Advantage | Your Outcome |
|---|---|---|
| Fixed core geometry | rungs Φ20 at 280 mm, clear width 500 mm, cage Φ700 from 2.2 m | every climber meets the same envelope your inspector measured |
| Structure dimensioned, not just the ladder | the drawing set calls out wall clearances and anchor zones | site trades build around real numbers, not guesses |
| Platform positions mapped | rest intervals set to your governing standard before quoting | no platform added by an inspector after installation |
| Single pieces up to 14 m | fewer splices engineered where the structure allows | shorter install, fewer bolted joints to inspect |
| Free dimension check | your field numbers verified against drawings pre-order | the rework you never have is the cheapest kind |