Material and product decision guide
Steel Grating vs Perforated Metal
Bar grating uses discrete bearing bars; perforated metal begins as sheet or plate with punched openings. Similar visual openness does not make their structural behavior equivalent.
Choose the surface function first, then obtain product-specific section, support, load, deflection, edge and attachment data for the selected form.
Side-by-side decision matrix
This matrix is a screening aid. It identifies what must be compared; it is not a substitute for the approved design or product data.
| Decision | Steel bar grating | Perforated metal |
|---|---|---|
| Base form | Bearing bars joined by cross bars. | Sheet or plate with a defined hole pattern. |
| Load path | Bearing direction is explicit. | Sheet thickness, folds, stiffeners and support geometry matter. |
| Open area | Set by bar spacing and cross bars. | Set by hole size, shape, pitch and margins. |
| Edges | Banding and cutout support are grating details. | Cut margins, returns and stiffeners can be critical. |
| Evidence | Use the exact grating manual or supplier table. | Use the exact sheet, hole pattern and formed-panel data. |
Choose Steel bar grating when
- The project needs an open load-carrying floor with a defined bearing direction.
- The required opening pattern and load table are available.
- Banding, support and attachment are coordinated.
All conditions still need confirmation against the exact panel, support, load case and governing specification.
Choose Perforated metal when
- A smaller or different hole pattern is a functional requirement.
- The formed or stiffened panel has verified structural data.
- Drainage, cleaning and edge safety are resolved.
Ask the supplier to identify any qualification, exception or missing evidence before treating the option as equivalent.
Inputs required for a defensible comparison
A quotation cannot resolve the choice unless both suppliers receive the same technical basis. Include the following in the RFQ and record assumptions explicitly.
- Bar spacing or hole pattern and open area
- Sheet/plate thickness or bearing-bar section
- Span, support, stiffeners and load footprint
- Edges, margins, cutouts and attachment
- Material, finish and order-specific data
Related product information: Steel grating product center · RFQ specification checklist. For preliminary sizing, use the load and deflection guide.
What this guide does not decide
It does not approve structural capacity, slip resistance, fire performance, chemical compatibility, electrical suitability, accessibility or legal compliance. Those decisions depend on the installed system, jurisdiction, test method and order-specific evidence reviewed by the responsible project team.
Primary references
Checked 2026-09-04. Confirm the edition and scope accepted by your project.