| EXPANDABLE 
Cast iron tree grates provide the advantage of being easily
expandable without losing their structural integrity. Over the years as tree trunks become
larger, the tree opening can be enlarged in increments to accommodate the growth. The best
method is to use an abrasive cutting wheel and notch the radial spokes at the junction of
the expansion rings. Then just break away the portion to be discarded. If you prefer, use
a power hacksaw and in some cases even a sharp cold chisel will work.
LIGHTING
Trees are beautiful in daylight - yet in the darkness of the night
they become shapeless and non-descript. But their natural beauty can be extended through
the hours of darkness with tree grate night illumination. Most of the tree grates in our
catalog can be made with removable light-opening sections so that subgrade lighting units
can be easily installed. All light-opening sections are secured with countersunk screws to
prevent unauthorized removal.
SECURITY BOLTING
The best security a tree grate can have is inherent in its own size
and weight. For additional security, most grates can be bolted to their frames at the
factory and shipped assembled to the job site. Standard bolting would be done with
flathead screws, countersunk flush with the grate surface. (Various tamper-proof bolts are
also available if required.)
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