Ladder Components Factory
Fixed Ladder Rungs.
20 mm round steel rungs at 280 mm pitch, welded to spec — replacement rungs with low MOQ, verified against the OSHA 12-inch rule. Quote in 24 hours.
Rung Diameter
Rung Spacing
Rung Load
85-100μm Coating
Rung Design
Fixed Ladder Rungs
The rung is the part a climber stands on every single trip, so we do not compromise on it. Our standard is a 20 mm round steel bar welded end-to-end into the side rails at 280 mm centers.
20 mm round bar
Φ20 mm (0.79 in) solid steel — comfortable grip, no sharp edges.
280 mm pitch
Rung spacing of 280 mm (11 in), within the ≤300 mm / 12-inch OSHA rule.
1.5 kN per rung
Minimum concentrated load rating; heavy-duty engineered on request.
Welded, not bolted
Full weld into the side rail per WPS — no loosening over years of use.
Replacement rungs, low MOQ
Need to refurbish an old ladder? Order replacement rungs in small quantities.
Fixed Ladder Rungs Specifications & Dimensions
| Rung Specification | Standard Range | Custom |
|---|---|---|
| Rung diameter | Φ20 mm (0.79″) | Φ22 mm / per spec |
| Rung spacing | 280 mm / 11″ | ≤300 mm (OSHA 12″) |
| Clear width | 500 mm (19.7″) | Custom width |
| Load rating | 1.5 kN per rung | Engineered heavy duty |
| Bar material | Q235B round bar | SS304 / SS316 |
| Attachment | Full weld to side rail | Per WPS |
| Finish | HDG 85 – 100 μm | Pickled / painted |
| Surface option | Smooth round | Serrated anti-slip |
OSHA 1910.27 rung spacing is verified on every drawing — the 12-inch rule is baked into our standard 280 mm pitch.
Rung Compliance
Compliance & DoCumentation (OSHA/BS 4211/EN ISO 14122-4)
- OSHA 1910.27 — Rung Spacing & Load
- OSHA 12-inch rule — spacing ≤300 mm
- BS 4211:2005+A1:2015
- EN ISO 14122-4
- AS 1657 — Australian Compliance
Documentation Package
Every rung order ships with complete documentation — no extra cost, no paywall.
-
Declaration of Conformity (DoC)
-
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)
Rung Options
Fixed Ladder Rung Spacing Options & Configurations
Choose rungs as part of a new ladder, or as replacement parts for an existing installation.
Galvanized Rungs
Q235B round bar with 85–100 μm HDG — the standard for new industrial ladders.
Replacement Rungs
Low-MOQ refurbishment rungs that match your existing rail spacing and pitch.
Factory-Direct Pricing
Factory-Direct Pricing & 24h Quote
Rungs are priced by bar weight and welding process. Order them with your ladder, or as low-MOQ replacements.
Rung quotation priced by weight & process. Industry reference: caged ladders ≈ USD 899–1,099/ton.
Common questions
Φ20 mm round steel bar — Q235B carbon, or SS304/SS316 stainless on request; galvanized per ISO 1461 when specified.
Yes — knurled or serrated rungs are available for wet or oily environments, in carbon steel or stainless.
OSHA requires at least 0.75 in (19 mm); our standard Φ20 mm (0.79 in) exceeds it with margin for the 1.5 kN rating.
Both — single replacement rungs or full sets, quoted as line items with low MOQ, matched to your hole pattern.
Full fillet weld to ISO 5817 Level C as standard; bolted rungs available for field replacement without welding.
Fixed Ladder Rungs
Fixed Ladder Rungs — Φ20 mm, 280 mm Pitch, Replaceable
Rungs take every climb — and every climber. Ours are Φ20 mm round steel at 280 mm pitch, rated 1.5 kN, and available as replacement line items so you repair instead of rebuild.
Rung Specifications
| Parameter | Standard value |
|---|---|
| Diameter | Φ20 mm (0.79″) — OSHA min 0.75″ |
| Spacing (pitch) | 280 mm (11″) — OSHA window 10–14″ |
| Length | 500 mm clear between rails (custom width) |
| Load rating | 1.5 kN per rung (≈337 lbf) |
| Material | Q235B / SS304 / SS316 round bar |
| Surface | HDG 85–100 µm or knurled / serrated option |
| Fixing | Welded to rails (ISO 5817 C) or bolted |
Replacement & Spacing Rules
| Topic | Rule |
|---|---|
| Uniform spacing | All rungs evenly pitched; 280 mm standard |
| OSHA limit | 10–14″ (254–356 mm) center to center |
| Replacement rungs | Sold as line items, low MOQ, matched to rail hole pattern |
| Damaged rung | Cut out and re-weld, or bolt-in replacement per design |
| Inspection | Check wear, bending, weld cracks at monthly checks |
Order rungs with your ladder and they arrive as part of the same fabrication batch — same material, same finish, one fit. Order them later and we match your existing rung geometry from the drawing or a field measurement.
Fixed Ladder Rungs — FAQ
Φ20 mm (0.79″) round steel bar — above the OSHA 0.75″ minimum — at 280 mm (11″) spacing, rated 1.5 kN per rung.
Uniform spacing of 10–14″ (254–356 mm) center to center under OSHA 1910.23; our standard 280 mm pitch sits inside that window.
Yes — replacement rungs are quoted as line items with low MOQ, matched to your rail hole pattern, in carbon steel or stainless.
The rung is cut out and a new one welded (ISO 5817 C) or bolted in, keeping the 280 mm pitch uniform across the ladder.
1.5 kN (≈337 lbf) concentrated load per rung in the standard design, verified by the structural calculation shipped with the ladder.
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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Why Work With Dengtai?
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DoC, MTC, structural calcs included free.
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8–12 containers/month. VCI + ISPM 15 packaging.
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