Key:structure
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 structure
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| Description |
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Describes the structure of masts (e.g. of high-voltage line masts or catenary masts). 
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| Group: power |
| Used on these elements |
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| Requires |
| Useful combination |
| Status: de facto |
| Tools for this tag |
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This tag describes the structure of pylons carrying high voltage electricity cables, tagged on power=tower and for catenary masts carrying overhead wires, tagged on power=catenary_mast.
Values
Pylons
For steel towers (or if no material tag is specified) the default value is lattice. For wooden or concrete towers the default is solid.
Catenary mast
There are several designs that can describe power=catenary_mast directly (tags given in the upper part of the following table). But for other masts, that doesn't fit that tags, there is an generic tagging (tags given in the lower part of the table) to describe the shape and the material with the known and used tag material.
| Key | Value | Description | Photos |
|---|---|---|---|
structure
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mapping by specific design of construction | ||
lattice |
lattice, based on tagging structure |
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frame |
flat frame masts consist of two U-profiles that are connected with flat steels | 
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h-beam |
catenary masts made of H-profiles or double T-beams (also known as Peiner-masts) | .jpg)
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trunk |
mast made from a tree trunk (means both simply debarked tree trunks and cylindrically milled tree trunks) | 
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pipe |
round solid steel wall masts | 
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wall_mount |
house wall or wall is used for supporting the overhead contact line, e. g. usual for tram electrification; a point is to map in the edge of the area marking the house (=wall of the house), cantilever or overhead span starts from the wall | 
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mapping by description of design of construction, specification via mapping of material is recommended - the following tags should only be used if none of the above mentioned tags describing a specific design fit
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spun |
spun poles have a round cross-section, are tapered and hollow on the inside; the production takes place by filling a round mould with a liquid/viscous material (often concrete is used - material can be defined by the tag material=*) while it is being spun and the material hardens |
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cylindrical |
solid masts wit cylindrical or (slightly) conical shape that are not hollow (catenary masts made of a trunk are mapped with the tag structure=trunk described above) |
_(2).jpg)
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polygonal |
solid masts with more than 4, but less than infinit (then they would be cylindrical) edges | 
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rectangular |
solid masts with 4 edges, rectangular cross-section | 
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