Factory-Direct Since 2004
Fixed Ladder
Definition
A fixed ladder is a ladder permanently attached to a structure — non-self-supporting, non-adjustable in length, installed at 60–90°. Built to spec with full compliance docs, quote in 24 hours.
What Is a Fixed Ladder?
Fixed Ladder Definition
Straight answers to the definition questions buyers ask before they spec. Every answer below uses our real build data — not marketing language.
A fixed ladder is a ladder that is permanently attached to a structure and cannot be moved or adjusted. By the ALI definition it is non-self-supporting, its length cannot be changed, and it is mounted at an incline of 60–90° from horizontal. At Dengtai we build them in steel, SS304/SS316 and aluminum to that definition.
Under OSHA 1917.118 and the ALI definition, what counts as a fixed ladder is a permanently mounted access ladder that is non-self-supporting and non-adjustable in length. It can be built as an individual rung ladder (rungs fixed to the structure) or with side rails, and may include a cage, well, or ladder safety device for fall protection. If it leans and moves, it is a portable ladder — not a fixed ladder.
A portable ladder is freestanding or leaning, designed to be carried and repositioned. A fixed ladder is permanently attached to a wall, tank, or structure with steel brackets or welds. It is non-self-supporting — the structure carries the load — and its length is set at the factory, typically from 10–25 ft standard with custom heights engineered up to 40 ft.
Not always. A fixed ladder can be mounted anywhere from 60° to 90° from horizontal. A vertical fixed ladder sits at 75–90° and needs a cage or fall-arrest system above 24 ft under OSHA 1910.27. Whatever angle your site calls for, we set rung pitch, standoff and cage to match the actual incline.
The fixed ladder parts that appear on every build are the side rails (stiles), rungs (Φ20 mm at 280 mm pitch), and standoff mounting brackets. Fall protection can be a safety cage (Φ700 mm), a well enclosure, or a ladder safety device that rides the rungs. Every part is quoted as a line item so you see exactly what your fixed ladder is made of.
Depending on your site it will be OSHA 1910.27, BS 4211:2005+A1:2015, EN ISO 14122-4, or AS 1657. We build to whichever governs your project and ship the Declaration of Conformity, MTC 3.1 material certificates and structural calcs with every order — free.
Yes — every Dengtai fixed ladder is made-to-order from your drawing or ours. Send a sketch or a dimension set and an engineer reviews it within 4 hours, with a shop drawing for approval before production. Quote in 24 hours, no obligation.
The Definition in Four Rules
What Counts as a Fixed Ladder
Four characteristics separate a fixed ladder from every other ladder type. If it fails any of these, it is not a fixed ladder.
Non-Self-Supporting
The structure carries the load. The ladder is attached to a wall, tank, column or roof — it never stands on its own.
Non-Adjustable Length
Height is fixed at fabrication. Standard tiers 10/12/14/16/18/20/25/29 ft, or engineered to your exact rise up to 40 ft.
Permanently Attached
Bolted or welded into place with steel standoff brackets — 8 mm brackets on standard builds, engineered anchors for seismic sites.
60–90° Incline
Mounted at 60–90° from horizontal. Steeper than 75° is a vertical fixed ladder and triggers fall-protection rules above 24 ft.
Fixed Ladder Definition in Practice
What Is A Fixed Ladder Options & Configurations
The definition stays the same — the configuration adapts to your structure, height and fall-protection requirement.
Caged Fixed Ladder
A fixed ladder with a Φ700 mm safety cage from 2.2 m — the classic fall protection for vertical access.
Wall-Mounted Fixed Ladder
Standoff brackets fix the ladder to a wall at the designed clearance — non-self-supporting by definition.
Fixed Ladder with Platform
Rest platforms split long runs — every 50 ft per OSHA — and a walk-thru top gives safe egress onto the landing.
Specifications
Fixed Ladder Definition Specifications & Dimensions
Real numbers behind the definition. Every value is what we fabricate, not a brochure range. Standard heights 10–25 ft, full custom engineering up to 40 ft.
| Specification | Standard Range | Custom |
|---|---|---|
| Height | 10 – 25 ft (3 – 7.6 m) | Up to 40 ft engineered |
| Material | Q235B / SS304 / SS316 | Duplex / 6063-T5 AL |
| Rung Diameter | Φ20 mm (0.79″) | Per spec |
| Rung Spacing | 280 mm / 11″ (≤300 mm) | Per project spec |
| Clear Width | 500 mm (19.7″) | Custom width |
| Cage Diameter | Φ700 mm (27.5″) | Custom |
| Load Rating | 1.5 kN per rung (≈337 lbf) | Engineered |
| HDG Thickness | 85 – 100 μm (ISO 1461) | Heavier coating |
| Finish | HDG / Pickled / Painted | Electropolish (SS) |
| Fall Protection | Cage or PFAS | Ladder safety system |
Certifications
Compliance & DoCumentation (OSHA/BS 4211/EN ISO 14122-4)
- OSHA 1910.27 — Full Compliance
- BS 4211:2005+A1:2015
- EN ISO 14122-4
- AS 1657
- Cal/OSHA Title 8
Documentation Package
Every order ships with complete documentation — no extra cost, no paywall.
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Declaration of Conformity (DoC)
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Material Test Certificates — EN 10204 3.1
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Structural Calculations
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Welding Procedure Specifications
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Surface treatment certificates (HDG per ISO 1461)
Factory-Direct Pricing
Factory-Direct Pricing & 24h Quote
Every fixed ladder is quoted item by item — material weight, machining, welding, finishing, packaging — so the definition of your price is as transparent as the ladder itself.
Custom quotation priced by weight & process. Industry reference: caged ladders ≈ USD 899–1,099/ton.
Common questions
Rungs, side rails (or individual rungs), standoff brackets, and optional cage, well or ladder safety device — plus rest platforms on long runs.
Q235B steel, SS304/SS316 and 6063-T5 aluminum, with HDG 85–100 μm, pickled or painted finishes.
Φ20 mm rungs at 280 mm (11 in) spacing, 500 mm clear width, rated 1.5 kN (≈337 lbf) per rung.
Roof hatches, tanks and silos, plant rooms, ship access and machinery platforms — anywhere permanent vertical access is needed.
Under OSHA, fall protection is required above 24 ft — a cage, well or ladder safety system; below that a plain fixed ladder is compliant.
Fixed Ladder Definition
What Is a Fixed Ladder? The ALI & OSHA Definition
A fixed ladder is a ladder that is non-self-supporting, cannot be adjusted in length, and is permanently attached to a structure. This is the working definition used by the American Ladder Institute (ALI) and mirrored in OSHA rules.
Definition Elements (ALI)
| Element | ALI Requirement |
|---|---|
| Support | Non-self-supporting — fixed to the structure |
| Length | Not adjustable in length |
| Attachment | Permanently attached to the structure |
| Inclination | 60–90° from horizontal (vertical ladders ~75–90°) |
| Climbing element | Individual rung ladder (OSHA 1917.118 term) |
OSHA Terms You Will See
| Term | Meaning (OSHA 1917.118 / 1910) |
|---|---|
| Individual rung ladder | Ladder with rungs but no side rails or cage |
| Cage | Enclosure of hoops and vertical bars around the climbing space |
| Well | Enclosure around the ladder with 27–30 in clear inside width |
| Ladder safety device | Vertical rail or cable system that arrests a fall (PFAS-compatible) |
| Side rail | Vertical member the rungs are welded or bolted to |
What counts as a fixed ladder in practice: a wall-mounted or structure-mounted ladder with rungs at 280 mm (11″) spacing, 500 mm clear width, permanently fixed with brackets or welds — not a ladder you carry, lean, or adjust. Real production data: rungs of Φ20 mm round steel, 1.5 kN rated per rung, hot-dip galvanized 85–100 µm.
Fixed Ladder Definition — FAQ
A fixed ladder is non-self-supporting, cannot be adjusted in length, and is permanently attached to a structure at an inclination of 60–90° from horizontal.
It means the ladder is bolted, welded, or embedded to the structure — e.g. 8 mm standoff brackets or welded lugs — and cannot be repositioned by hand.
A cage is a hoop-and-bar enclosure (Φ700 mm), a well is a solid enclosure with 27–30 in inside width, and a ladder safety device is a vertical rail/cable fall-arrest system.
No. Step and extension ladders are portable and self-supporting or adjustable; a fixed ladder is permanently attached and length is not adjustable.
60–90° from horizontal per ALI; most industrial fixed ladders are vertical (75–90°). Our standard is a vertical rung ladder with 280 mm rung pitch.
Proven in real facilities
Reference projects are shown by industry, country and scale. Client names are available on request with approval.
National utility projects — 15+ countries
23 documented projects, 2021-2025 · 2025
All standardsEnergy & industrial clients — Global
500+ projects since 2004 · 2004-2025
Full compliance docsLargest single order — Malaysia
60 units in one project · 2021
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Related Fixed Ladder Definition Pages
Go deeper into fixed ladder definitions, types and the standards that govern them.
Fixed Ladder Specifications
Real rung data — Φ20 mm @ 280 mm, 500 mm width
Types of Fixed Ladders
Rail, individual-rung, side-step, through and caged
Fixed Ladder Parts
Side rails, rungs, standoff brackets and cage options
Fixed Ladder Guidelines
OSHA 1910.27 and 14122-4 rules in plain language
Are Fixed Ladders Permanently Attached
How fixed ladders bolt to structure with steel brackets
Compliance Standards
OSHA, BS 4211, EN ISO 14122-4 and AS 1657 references