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Oct. 31, 2026
A repeat steel grating order may look simple, but a small change in panel size, bearing-bar spacing, material, or finish can affect fit and performance. Use this repeat steel grating order checklist to compare the new request with the approved drawings and site conditions. Whether you are reordering steel bar grating panels for a plant, walkway, or platform, confirm the details below before approving production.
A repeat steel grating order is a new purchase of grating intended to match panels supplied or approved previously. “Repeat” describes the buying history; it does not guarantee that the old specification still matches the current project. The original drawing may have been revised, the installation may have changed, or the new panels may need to meet updated project requirements.
Steel bar grating is an open grid made from load-carrying bearing bars joined by cross bars. The bearing bars span between supports and carry most of the applied load. Cross bars hold the bearing bars in position and help form the grid. Common order terms include:
Bearing-bar size: The bar’s depth and thickness. These affect the panel’s strength and fit.
Bearing-bar spacing: The distance between the load-carrying bars, usually measured center to center.
Cross-bar spacing: The distance between cross bars across the panel.
Span and direction: The distance between supports and the direction the bearing bars must run.
Panel size: The overall length and width, including any specified cutouts or edge details.
Finish: The specified surface treatment, such as painted or hot-dip galvanized steel.
Ask the supplier to identify the units and measurement conventions used on the drawing. A dimension stated in inches must not be assumed to mean millimetres, or vice versa.
A commercial grating supplier needs more than an old invoice or a panel count to make a reliable repeat. Two panels with the same outside dimensions can differ in bearing-bar size, spacing, material, load capacity, or finish. If any of those details change, the replacement may not fit the supports or perform as expected.
Complete order information also helps prevent avoidable delays. A controlled drawing, a written specification, and a clear revision number give the buyer and supplier the same reference point. For safety-critical floors and access ways, have the responsible engineer confirm that the selected grating suits the actual span, loads, and support conditions. Do not use a supplier’s general product description as a substitute for project-specific engineering approval.
Find the latest approved drawing, bill of materials, or purchase specification. Compare its revision number and date with the records from the previous order. Check whether the site team, engineer, or contractor issued a change after the first delivery. If the drawing is unclear or missing, measure the installation and obtain written approval before ordering. Do not rely on memory or an old email description.
Confirm each panel’s length, width, quantity, and installation location. Check the bearing-bar direction against the support layout: the load-carrying bars normally span between supports, but the project drawing must define the required orientation. Record cutouts for columns, pipes, drains, or equipment, along with notch locations and edge details. Confirm whether measurements refer to the finished panel or to a fabrication dimension.
For a large or irregular installation, use a panel schedule that links each panel mark to a location and drawing. This makes it easier to identify panels during delivery and installation.
Confirm the clear span between supports and the loads the grating must carry. Relevant loads may include people, stored materials, carts, vehicles, or equipment, depending on the site. Also check whether the design calls for a particular deflection limit, concentrated load, or safety requirement. The supplier should receive the project’s approved design information, and the responsible engineer should verify the selection.
Do not assume that a panel from an earlier area is suitable for a new location just because it looks the same. Different spans and uses can require different grating specifications.
State the required base material and grade, along with any corrosion-protection or coating requirements. If the order calls for hot-dip galvanizing, identify the applicable project specification and acceptance requirements. ASTM A123/A123M is a recognized specification for zinc coatings on iron and steel products made by the hot-dip process; confirm with the project engineer whether it applies to the product and contract.
Also confirm any requirements for painted finishes, stainless steel, or other materials. Consider the operating environment, including moisture, chemicals, temperature, and exposure to outdoor conditions. A finish that worked in one area may not be suitable in another.
Confirm the required dimensional tolerances, squareness, banding, end treatment, and weld or attachment details. State which standard or project specification governs acceptance. The ANSI/NAAMM MBG 531 Metal Bar Grating Manual is an industry reference buyers may encounter, but the purchase documents should clearly say which requirements apply. Avoid assuming that a standard has been adopted unless the contract or responsible project professional confirms it.
Reconcile the panel count with the panel schedule and include any spare panels if the project requires them. Confirm marking and labeling so each panel can be matched to its installation location. Discuss packaging, unloading, delivery access, and the requested delivery date. If the job has multiple delivery phases, list the quantities and dates for each release.
Ask how changes will be handled after order approval. A written process for drawing revisions and change requests can reduce the risk of producing panels to superseded information.
Before placing the order, agree on what records will be supplied, such as material documentation, coating information, dimensional checks, or inspection reports, when required by the contract. Specify how the buyer will review the goods and report a discrepancy. Keep the approved drawing, purchase order, supplier confirmation, and delivery records together for future maintenance or replacement orders.
Steel grating is used where a strong, open walking or working surface is needed. Common applications include:
Industrial platforms, mezzanines, and equipment access areas.
Walkways, stairs, landings, and maintenance routes.
Drainage covers and trench covers, where the design and local requirements allow.
Power, water, manufacturing, and processing facilities.
Commercial and infrastructure sites that need access panels or service platforms.
The correct specification depends on the location and intended use. For example, a walkway exposed to wet conditions may need a different surface or finish from an indoor service platform. Confirm slip resistance, opening size, load needs, and applicable site rules with the project team.
A carefully checked order can help panels fit their supports, match the approved design, and arrive ready for installation. Accurate panel marks and delivery details make site handling easier. Confirming material and finish helps align the order with the service environment, while clear inspection requirements make acceptance more straightforward.
These benefits depend on correct project information and suitable engineering review. No checklist can replace a load calculation, site measurement, or applicable safety requirement.
Send the supplier a complete order package: approved drawings with revision numbers, a panel schedule, material and finish requirements, load and span information, quantity, delivery instructions, and inspection expectations. Ask the supplier to acknowledge the key specifications in writing before production. Review the confirmation against your purchase documents rather than assuming the previous order details were copied correctly.
When comparing suppliers, consider their ability to answer technical questions, control drawing revisions, identify panels, and provide the documentation required by your contract. CANRI can be included in your supplier review; share the same specification and evaluation criteria with every prospective supplier so you can compare responses fairly.
An invoice can help identify the earlier purchase, but it may not show all engineering details, drawing revisions, or site changes. Use the approved drawing and specification as the main reference, then ask the supplier to confirm the current requirements.
Provide panel dimensions and quantity, bearing-bar and cross-bar details, span and load information, material and finish, cutouts and edge details, applicable specifications, delivery requirements, and the latest drawing revision. If some information is not available, identify it clearly and ask the project engineer to confirm it.
No. The required coating and acceptance criteria depend on the applicable specification, product, and contract. State the governing requirement in the purchase documents and confirm it with the project team. ASTM A123/A123M is one recognized hot-dip zinc coating specification, but its applicability must be established for the order.
That depends on the project’s maintenance plan, the difficulty of sourcing replacements, and the cost of storing spare panels. If spares are needed, identify them in the panel schedule and label them clearly so they can be matched to the correct location later.
Have the supplier return a written order confirmation tied to the approved drawing revision. Check the dimensions, panel marks, quantity, material, finish, and delivery details. Obtain engineering approval for load-related selections before authorizing fabrication.
Use this checklist to prepare the next purchase, then compare the supplier’s confirmation with the approved project documents before authorizing production. Keep the final drawings and inspection records for future maintenance. When planning reordering steel bar grating panels, clear specifications and a documented review are more dependable than assuming the next batch will match the last. Contact CANRI to discuss your requirements and request the product information needed for your evaluation.
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