====== Object library - Constructions ======

===== References =====
The height reference for the design and construction of the substructure, whether for fillings, cuts, bridges or tunnels, should always be the top of the rail. For the distance between the rail top and the formation plane, refer to the ballast chapter in the Technical Regulations.[[https://trv.banenor.no/wiki/Overbygning/Prosjektering/Ballast|ballast-kapittelet]] i Teknisk Regelverk.

See otherwise [[https://trv.banenor.no/wiki/Underbygning/Prosjektering_og_bygging|design and construction]] in the Technical Regulations



**[[{|width:20em; color:blue}objektbibliotek2:underbygning:trekkekum|cabel manhole]]**
**[[{|width:18em; color:blue}objektbibliotek2:underbygning:kabelkanaler|cabel duct]]**
**[[{|width:12em; color:blue}objektbibliotek2:underbygning:Elementkulvert|element culvert]]**

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