Lamp post designed to break on impact - incorporates bored-out section above ground level to produce relatively weak section

The post (1) for supporting lighting, wires etc. is of wood and is solid in its upper section. The lower section (L) has its core (2) bored out, leaving a supporting wall. On impact by a vehicle, the bored-out section breaks comparatively easily compared to its solid equivalent. The post wall thickn...

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Bibliographic Details
Main Authors ROPPONEN, EERO, HEINOLA, FI, FORSMAN, CURT
Format Patent
LanguageEnglish
Published 15.07.1993
Subjects
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE
BUILDING
BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
FENCING
FIXED CONSTRUCTIONS
MASTS
SWIMMING OR SPLASH BATHS OR POOLS
TENTS OR CANOPIES, IN GENERAL
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Summary:The post (1) for supporting lighting, wires etc. is of wood and is solid in its upper section. The lower section (L) has its core (2) bored out, leaving a supporting wall. On impact by a vehicle, the bored-out section breaks comparatively easily compared to its solid equivalent. The post wall thickness can be between 23 to 35 mm, and can preferably be 35 mm. The height of the bored-out section above ground can be between 0.3 mm and 1.5 mm. USE/ADVANTAGE - Economic street lamp post which breaks easily on impact.
Bibliography:Application Number: DE19924239795