Technical Appendix - Tree grilles and guards

Protect at the right time, dress to measure…

The GHM line of tree grilles and guards gives the city planner the means to encourage the growth of trees in the urban environment. Everyone understands the benefits of vegetation in cities: plants alleviate the weight of the urban environment, bringing a touch of life, nature and serenity. This requires that the correct equipment be used to guarantee the sapling's health when it is planted: a support to maintain it during its growth, protection of the trunk from urban aggressions and the exposure of the soil covering its roots are the functions expected of GHM tree grilles and guards. Round, square, eccentric, in two or four parts, often drawn by famous designers, the GHM the grilles happily merge into contemporary settings. Straight or flared galvanised steel tree guards complete the system available to city planners.

Finishes and colours


All GHM products are carefully prepared before the final coating is applied. Surface preparation: Cast iron: zinc coating (NF EN ISO 2063 standard) / Aluminium: phosphating passivating / Steel: hot dip galvanisation (NF EN ISO 1461), zinc coating (NF EN ISO 2063) / Certified origin timber: varnish sanding, sanding, drying and application of paint or surface treatment. Coating: cast iron, aluminium, steel: application of a polyester thermosetting powder coat in RAL shades.


On demand, some of our tree grille models can be fitted with watering, spotlights to highlight the plants and space to house two or four supports.  Depending on where they are installed, and to meet traffic requirements, reinforced frames are also available.

The materials


Manufactured from grey or ductile cast iron, with non slip surfaces and galvanised steel frames, the GHM tree grilles are especially strong and long lasting.


picto jardin   recommended for
parks and gardens
picto pose sol fini installation on finished
ground surfaces
picto ville  

recommended for
city centers

picto pose encastrement embedded installation
picto vigipirate   vigipirate picto arrosage watering box-hole
picto bois lasure   Surface coated wood picto tuteurs support space
picto pmr  

compliant with the French 18th September 2012 order covering the technical requirements for street and public space accessibility.

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