The Tree Grille protects the roots while allowing rain and water to pass through. The Tree Grille's sub-frame provides support from underneath.

Tree grille

Anders Nyquist

Tree grilles are extensions of the pavement, providing an attractive but functional feature in urban areas. As they protect the roots they allow rain to funnel through to water the tree. This tree grille can be fitted directly into the surrounding pavement or placed atop a sub-frame that keeps it level during the tree’s growth. A steel version of the sub-frame can withstand up to 12 tonnes of weight. It can be ordered for heavily-trafficked areas that require reinforcement.

Dimensions
TREE GRILLE
Length: 140 cm
Width: 140 cm
Depth: 5 cm
Weight of each component: 76 kg
Number of components: 4

SUB-FRAME
Length of sub-frame: 140 cm
Width of sub-frame: 140 cm
Depth: 8 cm
Weight of each component: 37 kg
Number of components: 2

ROOT BARRIER
Length: 140 cm
Width: 140 cm
Depth: 60 cm
Weight of each component: 145 kg
Number of components: 5
Product number
Ö30-71 Tree Grille
Ö30-71BT80 Irrigation tank 80 l
Ö30-72 Fixtures (4 pieces)
Ö30-73 Sub-frame in steel
Ö30-75 Lifting device for tree grilles
Variants
One version is available in steel to withstand heavy loads. Another version has a concrete sub-frame to control root growth and an optional irrigation tank.
Materials
The tree grille is made from cast iron with a thickness of 50/44 cm. The sub-frame is made from zinc electro-plated steel with U-beam USP80. The root control barrier is made from reinforced concrete with a thickness of 10 cm (there are openings in the bottom to enable roots to grow deeper).
Placement
The surface grille’s own weight is substantial enough to secure it to the sub-frame without fittings. If it is installed without the sub-frame we recommend securing it with metal fittings Ö30-72, which you will need to include in your order.
Maintenance
Over time, cast iron may develop rust on the surface but it will not affect the structural integrity. Anti-rust treatments may be applied from time to time.
Character
Tree grilles are extensions of the pavement that protect the roots while allowing rain to funnel through to water the tree.