Factory-Direct Since 2004
Fixed Ladder
Specifications
Every measurement you can verify on delivery — Φ20 mm rungs at 280 mm pitch, 500 mm clear width, 1.5 kN rated, HDG 85–100 μm. Built to spec, quoted in 24 hours.
Fixed Ladder Measurements
Fixed Ladder Specifications
The numbers buyers ask for before they order — rung data, well widths, load ratings. All values are what we actually fabricate.
The standard build is Φ20 mm (0.79″) rungs spaced 280 mm (11″) center-to-center, with a 500 mm (19.7″) clear width between stiles. Rungs are rated 1.5 kN each. Those four numbers define almost every fixed ladder we ship.
Where a well enclosure is specified, OSHA 1910.27 and 1917.118 expect well clearance in the 27–30 in band. Our Φ700 mm (27.5″) safety cage and matching well enclosures are built inside that envelope, with the exact opening quoted from your well opening size.
OSHA 1910.27 allows 10–14 in (25–36 cm) center-to-center. Our 280 mm (11″) standard sits comfortably inside that band, and BS 4211 / EN ISO 14122-4 accept the same pitch. The hard cap we hold to is 300 mm (11.8″).
Our standard clear width is 500 mm (19.7″) between the stiles. OSHA 1910.27 requires a minimum climbing width of 16 in (41 cm), so 500 mm gives you margin. Narrower or wider widths are cut to your spec.
Standard rungs are rated 1.5 kN (≈337 lbf) each. If your site needs a heavier rating — for maintenance crews with tools, or high-frequency traffic — we engineer the rung diameter and stile section to match and include the structural calc in the docs.
Standard lengths run 10/12/14/16/18/20/25/29 ft — the conventional ladder tiers in the market. Anything in between is cut to your rise, and custom heights are engineered up to 40 ft with platform spacing per code.
HDG is applied at 85–100 μm to ISO 1461 on steel builds — thick enough to pass the zinc coating test and survive outdoor service. SS304/SS316 and aluminum skip galvanizing and get their own finish (electropolish or anodize on request).
Fixed Ladder Measurements at a Glance
The Four Numbers That Define a Spec
Grab these four and you can start a quote. The rest is fall protection, material grade and finish.
Fixed Ladder Measurements by Configuration
Fixed Ladder Measurements Options & Configurations
The core measurements stay the same — the configuration changes standoff, fall protection and the top landing.
Wall-Mounted
8 mm standoff brackets set the climbing clearance. Closer bracket spacing stiffens the run for taller heights.
Walk-Thru Top
The top rungs are replaced by a walk-thru platform — same 500 mm clear width, with egress onto the landing.
With Rest Platform
Runs over 50 ft get rest platforms every 50 ft per OSHA — platform width and guardrail are engineered into the package.
Specifications
Fixed Ladder Specifications Specifications & Dimensions
The full parameter sheet behind the answers above. Standard heights 10–25 ft, full custom engineering available up to 40 ft. Verify every value against the drawings you receive.
| 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 |
Factory-Direct Pricing
Factory-Direct Pricing & 24h Quote
Send your measurements — we itemize the quote by material weight and process. Free drawing review, structural calcs included.
Custom quotation priced by weight & process. Industry reference: caged ladders ≈ USD 899–1,099/ton.
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.
-
Declaration of Conformity (DoC)
-
Material Test Certificates — EN 10204 3.1
-
Structural Calculations
-
Welding Procedure Specifications
-
Surface treatment certificates (HDG per ISO 1461)
Common questions
Q235B carbon steel (≈ASTM A36 / EN 10025), SS304 or SS316 stainless — with MTC 3.1 material certificates for every batch.
Any height — sections are joined with rest platforms every 50 ft; the HDG bath handles single pieces up to 14 m.
7 in (178 mm) behind the rungs to the wall, held by 200 mm standoff brackets with 8 mm plates.
2.2 m (≈7 ft) above the base with a flared entry, extending 42 in (1.1 m) above the landing platform.
Machining per ISO 2768-mK with full dimension verification on the final inspection report.
Fixed Ladder Measurements
Fixed Ladder Specifications & Dimensions — Full Table
Every dimension below is what we fabricate. Values are verified against OSHA 1910.23, ANSI A14.3, BS 4211 and EN ISO 14122-4, and each order ships with a Declaration of Conformity plus structural calcs.
| Parameter | Standard Value | Standard Reference | Custom Option |
|---|---|---|---|
| Overall height | 10 – 25 ft (3 – 7.6 m) | — | Engineered up to 40 ft, multi-section |
| Rung diameter | Φ20 mm (0.79″) | OSHA min 0.75″ (19 mm) | Per project spec |
| Rung spacing (pitch) | 280 mm (11″) — within OSHA 10–14″ | OSHA 1910.23(d)(1) | Per project spec |
| Clear width (between rails) | 500 mm (19.7″) | OSHA min 16″ (406 mm) | Custom width |
| Rung-to-wall clearance | ≥7″ (178 mm) behind rungs | OSHA 1910.23(d)(1) | Standoff bracket depth |
| Side rail extension | 42″ (1.07 m) above landing | OSHA 1910.23(d)(1) | Per project spec |
| Cage inside diameter | Φ700 mm (27.5″, ≈29″ ID industry) | ANSI A14.3 / BS 4211 | Custom |
| Cage start height | 2.2 m (7.2 ft) above base | OSHA legacy cage rule | Per project spec |
| Ladder well inside width | 27 – 30 in (686 – 762 mm) | OSHA well rule / ANSI A14.3 | Custom enclosure |
| Rung load rating | 1.5 kN per rung (≈337 lbf) | EN ISO 14122-4 / BS 4211 | Engineered higher |
| Material | Q235B carbon steel / SS304 / SS316 | — | Duplex, 6063-T5 aluminum |
| Galvanizing | HDG 85 – 100 µm | ISO 1461 | Heavier coating on request |
| Welding quality | ISO 5817 level C | ISO 5817 | Level B |
| Fall protection | Cage, well, or ladder safety device (PFAS) | OSHA 1910.28(b)(9) | PFAS rail as standard for new >24 ft |
| Finish | HDG / pickled / painted | — | Electropolish (stainless) |
The minimum required inside width of a fixed ladder well is 27 in (686 mm); our standard enclosure keeps 27–30 in of clear climbing space. If your tender specifies dimensions, send the drawing — we fabricate to the number on the sheet, not to a brochure.
Fixed Ladder Specifications — FAQ
Standard: 10–25 ft height, Φ20 mm rungs at 280 mm pitch, 500 mm clear width, Φ700 mm cage where fitted — all dimensions custom-engineered on request.
27 in (686 mm) minimum; we build well enclosures at 27–30 in inside width so climbers have full clearance for the body and a fall-arrest harness if worn.
Center to center, vertically. Our standard pitch is 280 mm (≈11″), inside the OSHA 10–14″ (254–356 mm) window for uniform spacing.
1.5 kN (≈337 lbf) per rung in the standard configuration, verified by structural calculation supplied with every order.
Yes — Declaration of Conformity, MTC 3.1 material certificates, and structural calculations accompany every order, referencing the applicable standard.
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
HDGGet Your Quote
Talk to an Engineer
Free drawing review. Itemized quote in 24 hours. No obligation.
Why Work With Dengtai?
Full Compliance Docs
DoC, MTC, structural calcs included free.
24-Hour Quote
Engineering review + itemized quote within one day.
Global Delivery
8–12 containers/month. VCI + ISPM 15 packaging.
Request a Quote
Related Fixed Ladder Specifications Pages
More fixed ladder measurements, standards and configuration detail.
What Is a Fixed Ladder
Definition and the four rules that make a ladder "fixed"
Fixed Ladder Safety Cage
Φ700 mm cage, 2.2 m start, PFAS ready for OSHA
Fixed Ladder Wells
Well enclosures built to 27–30 in clearance
OSHA Fixed Ladder Specifications
Rung spacing and cage dimensions per 1910.27
Fixed Ladder Rungs
Rung diameter, pitch and load data in one place
Compliance Standards
OSHA, BS 4211, EN ISO 14122-4 and AS 1657 references