This is only aluminium plate and does not include bracing. You may add bracing as an option. Obstruction markers may be used to delineate obstructions within or above the road. Typical uses of these markers are -

(i) to highlight road closures, either mid-block or at the end of a cul-de-sac; and
(ii) to delineate vertical clearance above the road where height restrictions exist, i.e. overhead structures requiring the display of a sign LOW CLEARANCE ...m (R6-11) (see Clause 3.6.6.1 (g)).

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