Tag Archives: Andrew Mentis


There is a trend away from serrated grating because while it is suitable for some applications, there are others where over an extended period it will no longer provide the underfoot traction required to ensure safety.

Floor grating is never a case of one size fits all, and according to Lance Quinlan, national technical sales consultant at Andrew Mentis, in certain applications the serrated feature on the grating surface becomes filled with grime. “This means that the serrated edge, chosen for this specific feature, no longer functions as a tractive surface and does not provide adequate grip,” he explains.

Andrew Mentis has more than sixty years’ experience producing floor grating at its ISO accredited manufacturing facility and is known as the benchmark product across Africa. Quinlan says it is always important to not only consider the finish of the floor grating selected for an application, but also critical to look at how the grating is being manufactured.

Mentis Flat Top floor grating is manufactured from slit coil material which provides the major advantage of having the flat top finish for which this product is named.
This is unlike other manufacturers in the industry where the top of the flat bar has a rounded finish due to the manufacturing process at the mills. The disadvantage of the rounded top is that it will give little to no grip underfoot.

In addition to its Mentis RS40 (40/40) floor grating which is considered the benchmark product across a range of industry sectors, Andrew Mentis, long ahead of the curve when it comes to providing solutions in floor grating, has also engineered a specific floor grating product that has a unique positive/raised non-slip characteristic on the flat bar section.

“While we do offer the serrated top if requested, we prefer to supply positive non-slip to our customers,” says Quinlan. “By serrating the bar the strength of the grating can be reduced by up to 25%. We see that as an uneconomical use of steel which does not translate into value for our customers.”

By manufacturing the flat bar section with this unique raised dimple feature, Andrew Mentis has provided a grating which offers a far better tractive surface than just the plain Mentis flat bar grating and the Mentis serrated grating, while retaining the same strength as the flat top product.

Mentis Rectagrid RS40 (40/40) Non-Slip grating is available ex stock in panel sizes of 2400 mm by 1200 mm. And importantly, for customers who have specific application requirements the floor grating can be tailored to meet the specific drawing requirements.
It is also available in mild steel unpainted, bitumen painted and galvanised.

This highly engineered floor grating product is produced at Andrew Mentis’ world class facility at Elandsfontein, Johannesburg.
The company offers a full technical advisory service to assist to customers in the selection process, and Quinlan says this service has become increasingly popular with industry.


Floor grating is a critical element in process plants and similar structures, yet it is often the Cinderella of components when it comes to the design and engineering work. For this reason, Andrew Mentis is urging design houses and EPCM contractors to pay particular attention to the selection of appropriate floor grating products.

Lance Quinlan, national technical sales consultant at Andrew Mentis, says that while floor grating could be considered an off-the-shelf product and popular sizes are generally available ex-stock, it is a serious error to believe that this product complies with the one-size-fits-all-rule.

“There is more than one option available when it comes to floor grating, and we have increasingly found that many younger engineers are not aware of this, and this is where Andrew Mentis’ strength of technical expertise and applications knowledge plays a vital role in industry,” Quinlan says.

In urging design houses and engineering operations to speak to the company’s technical team prior to the feasibility stage on projects, Quinlan says that the company concedes that architects and engineers do not know all the ins and out when it comes to floor grating. “This is why we interact so closely with our customer base enabling them to make appropriate and fit-for-purpose choices when it comes to floor grating,” he says.

“Because strength to weight ratio is important to our customers, we discuss each customer’s exacting needs. This information, together with structural steel drawings supplied by the customer, is then used by our processing department to compile a layout for the required products. An evaluation of the ambient climatic conditions, the volume of traffic expected on the floor grating and a thorough understanding of the load bearing capacity of grating combine to ensure that the correct floor grating product is selected for an application,” Quinlan says.

Load bearing capacity is critical in all floor grating applications, and it is essential that engineers review the manufacturing processes of the supplier to ensure that the product selected will provide optimum safety of people walking or working on the walkways, catwalks, platforms and ramps.

“While taking into account the customer’s application needs, there are specific non-negotiable factors that Andrew Mentis applies in the production of all our floor grating products,” Quinlan says. “The manufacturing method we use, for instance, ensures that the transversals are positively and permanently locked to the bearer bars.”

The production process ensures that the round transverse bar fits tightly through the pierced bearer bar. This not only guarantees the superior structural integrity of the product, but also eliminates vulnerability to corrosion.

Floor grating is available in a variety of finishes including unpainted mild steel, bitumen coated mild steel or hot dip galvanised. The product can also be manufactured in stainless steel or 3CR12, depending on the application requirement.

Significantly, Andrew Mentis is a single source supplier of floor grating, stair treads, handrailing and expanded metal, and through access to the level of technical expertise residing within the company customers can be assured that products selected will be fit-for-purpose.


Andrew Mentis offers the advantage of an open-ended system (OES) on its RS40 (40/40) Rectagrid floor grating panels. This eliminates the banding of panels and because no welding is required, corrosion is minimised.

Lance Quinlan, marketing manager at Andrew Mentis explains that accurate pitching provides aesthetically pleasing pattern matching and an unjointed appearance when one joins open-ended panels. “In addition, the Rectagrid OES simplifies design and erection, and reduces cost to customer,” he says.

Rectagrid is formed by the unique Mentis process of compressive locking of bearer bars and transversals. This process ensures permanent locking and accurate bearer bar pitching, resulting in the industry’s safest grating. Manufactured in compliance with the international ISO 9001 quality management system, Rectagrid grating has a maximum width of 1 440 mm and a maximum length of 4 760 mm.

All transverse bars on the Rectagrid OES are 7.7 mm in diameter and the RS40 (40/40) Rectagrid panels finish on half pitches in both directions, with an allowance for a 4 mm clearance between the panels. “Saddle clamps will automatically hold panels at full-pitching spacing and calculations can therefore be based on full-pitches in both directions, without needing to make allowances for clearance between the panels,” Quinlan explains.

Standard OES panels are considerably more cost effective than banded panels and provide added cost and time savings to those customers who commonly cut and fit standard panels on site.