Proteus Gullies

An innovative solution to Gully clipping failures

Rhino is pleased to offer the new Proteus Gully 

• Narrow profile hinged gully grating
• Avoids excessive clipping by traffic
• D400 class
• Retains water clearing efficiency
• Fits a standard 450mm gully footprint 

The new, innovative proteus gully installed using the proprietary Ironmaster system is a solution to continually failing gulley gratings on heavily trafficked roads where the edge of a standard 450mm square gulley is continually struck by HGVs with its related ongoing maintenance problems. 

Site investigations revealed that heavy vehicles—particularly lorries—typically travel with their nearside wheels running approximately 300mm from the kerb edge. As a result, 450mm gullies positioned within this track are repeatedly subjected to direct loading from HGVs and buses.

This consistent wheel impact—known as “gully clipping”—leads to:

• Premature structural failure of the gully and surrounding carriageway
• Localised surface cracking and settlement
• Recurrent maintenance interventions

This pattern of stress and deterioration highlighted the need for a reinforced solution capable of withstanding continual traffic loading without compromise.

✅ The opening of the new Proteus gully is just 280mm from the kerb edge so that HGV wheels avoid driving over the grate which in turn reduces the impact on the frame. 

✅ The unique design retains the minimum waterway area required under HA104/09 by at least double that minimum requirement. 

✅ The hollow chamber under the angled section ensures the same water volume outputs as a traditional 450mm gully. 

✅ It has been tested and approved by BSi and is a class D400 

✅ One of the key elements of the design is that the base plate fits a standard 450mm gully so that this new Proteus Gully can be installed in place of an existing 450mm gully without adjusting the supporting structure. 

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