BOILER GRATING
Steel bar grating for boiler platforms, walkways, and stair treads — supplied as part of the boiler structure or as a standalone package. Fabricated to ASTM, GB, and EN standards with hot-dip galvanizing and full dimensional documentation.
Fundamentals
What is Boiler Grating?
Steel bar grating panels used as the floor surface on boiler platforms, walkways, and stair treads — providing safe footing with open drainage and ventilation.
Role on a Boiler Structure
A boiler structure has multiple elevated platforms — from ground-level ash handling up to top-drum level, often 20–40 m above grade. Every walking and working surface requires a compliant floor material. Steel bar grating is the standard choice because it is load-rated, self-draining, ventilated, and compatible with hot-dip galvanizing for long service life in outdoor industrial environments.
Grating is typically supplied as part of the complete boiler steel structure package, but can also be quoted and shipped separately for retrofit, replacement, or when a local steel contractor handles the main structure but not the flooring.
What We Supply
- Welded steel bar grating panels
- Press-locked grating panels
- Serrated-bar stair treads
- Toe plates and edge banding
- Fixing clips and fasteners
- Dimensional records & packing list
Product Range
Types & Selection
Select by load requirement, opening size, and surface finish needed for your platform application.
Welded Steel Grating
The standard type for boiler platforms. Bearing bars and cross bars resistance-welded at every intersection for maximum rigidity. Available with plain or serrated bearing bars.
- • Resistance-welded intersections
- • Plain or serrated bearing bars
- • ASTM A36 / Q235B / S235JR
- • Hot-dip galvanized as standard
Press-Locked Grating
Cross bars are mechanically pressed into pre-punched slots in the bearing bars — no welding, so suitable for stainless steel and alloy grades where welding is undesirable or where a flush top surface is needed.
- Smooth flush top surface
- Suitable for SS 304 / 316L
- Precise cross bar spacing
- Corrosive or hygienic environments
Serrated Stair Treads
Grating panels with serrated (notched) bearing bar edges for stair tread applications. The serrations grip boot soles and resist slipping on wet, oily, or icy surfaces.
- • Notched bearing bar top edge
- • Pre-sized to customer stair width
- • Nosing plate optional
- • Hot-dip galvanized standard
Ordering platform floor, stair treads, and trench covers together?
We can quote all grating types from one set of drawings — single order, single shipment.
Technical Data
Materials & Specifications
Standard dimensional data and material grades — send your drawing to confirm bearing bar size, pitch, and panel cut dimensions for your project.
Standard Bearing Bar Sizes & Load Classes
Steel Grades & Surface Treatment
Fabrication Standards & Certifications
Why Choose ORL Power
Grating and Boiler Parts from One Source
Consolidating grating, handrailing, and pressure parts into one order reduces freight cost and simplifies site delivery.
EN 1090 Certified Fabrication
Structural fabrication certified to EN 1090-1 / EN 1090-2 EXC2. CE marking and Declaration of Performance available for European and EN-aligned projects.
Boiler Structure Specialist
We fabricate grating alongside the complete boiler structure — familiar with platform loadings, panel cut layouts around openings, and beam-to-grating fixing details at every elevation.
Panel Marking & Packing Lists
Each panel is marked with a position reference matching the layout drawing. Packing lists and dimensional records ship with the goods so site teams can identify panels without guesswork.
Export-Ready Sea-Worthy Packing
Grating panels bundled and packed in wooden crates with protective wrapping for galvanized surfaces. Suitable for long-haul ocean freight to any destination port.
ISO 3834 Welding Quality
All structural welds performed to qualified WPS by certified welders. Welding records maintained and available for third-party inspection witness or QC review.
Combined Shipment with Boiler Parts
Grating, handrailing, and pressure parts can be packed in the same container — one shipment, one customs filing, lower freight per tonne for the complete project package.
Supply grating, handrailing, and steel structure from one source.
Send your platform layout drawings — we'll quote all structural components together.
Industries Served
Who Orders Boiler Grating
Any project with elevated boiler platforms needs compliant floor grating — from single industrial boilers to large utility power stations.
Power Plants
CFB, coal, biomass, and gas-fired power stations with multi-level boiler structures. High-load grating for turbine hall, boiler house, and ash handling platforms.
Sugar Mills
Bagasse-fired cogeneration boilers in tropical climates. HDG carbon steel grating is standard — resistant to humidity, steam, and bagasse dust.
Waste Heat Recovery
HRSG and waste heat boilers in steel, cement, and metallurgical plants. Grating often specified with anti-corrosion coating due to surrounding process gases.
Waste Incineration
MSW and WtE boilers. Corrosive flue gas environment may require stainless steel grating or heavy-duty coating for access areas near the flue gas path.
EPC Contractors
EPC and turnkey project contractors who source structural components — grating, handrailing, and steel structure — from the same supplier as the boiler to simplify logistics.
O&M Replacement
Plant operators replacing corroded or damaged grating panels during planned outages. Re-fabricated to existing panel dimensions or reverse-engineered from site measurements.
Manufacturing Process
Factory & Process
From structural steel incoming to galvanized, marked, and packed — how ORL Power controls each step of grating fabrication.
Frequently Asked Questions
Grating FAQ
Common questions from EPC contractors and plant engineers ordering boiler structural packages.
What is the difference between welded and press-locked grating?
Welded grating fixes cross bars to bearing bars by resistance welding at every intersection. This is the most common type for industrial platforms — strong, robust, and straightforward to manufacture in carbon steel for hot-dip galvanizing.
Press-locked grating punches slots in the bearing bars and presses the cross bars in mechanically — no welding heat. This is preferred for stainless steel (where welding affects corrosion resistance), for applications needing a flush top surface, or where very precise cross bar spacing is required. Press-locked panels are slightly more expensive but allow stainless and alloy grades without the distortion issues of welded construction.
When should I specify serrated bearing bars instead of plain?
Serrated bars have notched top edges that grip boot soles and resist slipping when wet, oily, or greasy — they are the standard specification for stair treads on all boiler access staircases. Many project specifications also require serrated grating on all walking surfaces around burner fronts, ash handling areas, and any zone where oil or water may be present.
Plain bars are acceptable for areas that are dry underfoot and infrequently accessed, such as cable trench covers and maintenance hatches. If your project specification is silent on this, we recommend defaulting to serrated bearing bars for all personnel access areas.
What surface treatment do you recommend for outdoor boiler platform grating?
Hot-dip galvanizing to ISO 1461 (85–100 µm zinc) is the standard recommendation for outdoor boiler platforms. Galvanized grating does not require periodic repainting — important because painting open-mesh panels on an operating boiler is difficult and costly. Galvanized carbon steel grating is particularly well suited to tropical climates (sugar mills in Southeast Asia, Latin America, and Africa) where constant humidity accelerates corrosion of painted surfaces. For plants where grating will be painted to match a corporate colour scheme, we supply shot-blasted and primed panels ready for finish coat application on site or at the erection contractor's workshop.
What information do you need to prepare a grating quote?
The fastest route to a quote is a platform layout drawing showing panel positions, cut dimensions, and openings. If drawings are not yet ready, the following allows a preliminary estimate:
- • Total area of platform flooring (m²) by elevation
- • Number and dimensions of stair tread sets
- • Bearing bar size and spacing (or load class required)
- • Surface treatment (HDG / painted / primer only)
- • Steel grade (carbon steel or stainless)
- • Applicable code or standard (ASTM / GB / EN)
- • Destination port and required delivery date
Can you supply grating together with handrailing, steel structure, and boiler pressure parts?
Yes. ORL Power supplies complete boiler structural packages including grating, handrailing, steel structure (columns, beams, staircase stringers), and all pressure parts under one order. Consolidating into one shipment reduces freight cost, simplifies customs documentation, and means the site team deals with a single supplier for any dimensional or delivery queries. For EPC contractors handling multiple boiler units, this is typically the most efficient arrangement and allows one inspection team to cover the complete package.
Get a Quote
Contact Our Engineering Team
Share your platform drawings or area estimates — we confirm bearing bar size, surface treatment, and lead time in one reply.
Get Your Grating Quote
Share your drawings or specs — we reply within 24 hours.
What to Include in Your Inquiry
- • Platform layout drawings (preferred)
- • Total m² by elevation or type
- • Stair tread count and stair width
- • Bearing bar size / load class required
- • Surface treatment (HDG / painted)
- • Steel grade and applicable code
- • Destination port & delivery date