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GRP TopBox Roof Entry for UK Police Firing Range

  • Writer: Hill Grwp
    Hill Grwp
  • Sep 24
  • 1 min read

Updated: Sep 30

We designed, manufactured, and supplied 2no. GRP TopBoxes (GRP Substations) specifically for a UK police firing range. Each unit was engineered to house ductwork and electrical containment in a safe, secure, and weather-protected environment.


Industrial equipment for roof entry (TopBox by Hill Grwp) in a factory setting with gray units and yellow crane hoists above. Green and metallic accents in the background.

Key features include:

  • Integrated Access Hatches – strategically positioned for wiring and routine maintenance, ensuring quick and safe access without disruption to operations.


  • Water-Sealed Construction – Incorporating advanced sealing solutions to prevent water ingress and protect all internal services.


  • Durable GRP Fabrication – Robust, with long-term corrosion resistance and minimal maintenance requirements.


  • Custom Design – Tailored to the site’s technical requirements, ensuring seamless interface with the existing ducting and containment systems.


These TopBoxes demonstrate our ability to provide specialist GRP solutions for challenging environments where safety, reliability, and performance are critical.



Large gray industrial equipment for roof entry (TopBox by Hill Grwp) on a flatbed truck in a warehouse. Yellow crane in the background, open garage door visible.
Large gray roof entry (TopBox by Hill Grwp) suspended by chains, with orange machinery nearby. Metallic reflective padding underneath. Indoor industrial setting.
Gray industrial roof entry (TopBox by Hill Grwp) with metal cable trays extending outward. Yellow support brackets attached. Bright warehouse lighting above.

Large gray roof entry (TopBox by Hill Grwp) in an industrial setting with chains and hooks for lifting. Bright yellow beams and green walls in the background.
Industrial setting with a large gray roof entry (TopBox by Hill Grwp) on metal legs, suspended by chains. Green background elements, exposed ceiling beams.
Gray roof entry (TopBox by Hill Grwp) with hatches and hinges hangs from yellow straps in an industrial setting. Overhead lighting creates shadows.

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