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Length-Measuring Instruments Using Mechanical Means
(AREA)
Abstract
The roof structure shall find application in road construction. It is relatively simplified and economical, its assembly is easier at greater accuracy of the superstructure of the height of the cover compared with the level of the road surfacing depending on the specific requirements. The roof structure includes a cover (3), supporting component (4) having the shape of cover (3) under which the adjustment part (5) is fitted attached to the walls (6) of the shaft. The adjustment part (5) is made of hard material and can have the form of a polygon or be round, and furthermore it is also possible to connect together several parts (5) to obtain the required height. 5 claims, 8 figures
BG10268898U1998-08-121998-08-12Roof structure of an inspection shaft
BG102688U
(en)