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Motorway portals

Motorway portal function is defined as a supporting steel frame construction the primary function of which is to support signs and signboards on roads and railways. These portal constructions are always delivered in various designs necessary for signs, signboards and devices. All requirements have to be met so that service and maintenance have access to install or remove the signboards. Depending on shape there are portals L, T, U . L-and T-type portals are mostly installed on the edge of a motorway or on the division line of motorway lane , U –portal is a frame going over all four lanes of the motorway and it is mostly provided with a walkway on the top. i.e. walkways are made of grating for maintenance in horizontal part. Access ladders are typically provided on vertical parts of the portal.


 

date: 2019-05-21

Name day of: Zina

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770970

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