Depending upon its purpose and a level of complexity for convenience the metal constructions are subdivided into the following classes (categories):
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Category
|
Type of construction
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| I |
|
| II |
|
| III |
|
| IV |
|
| V |
|
Prior to manufacturing of metal constructions, rolled stock is preliminary cleaned from oxides and metallurgic scale by means of shot-blasting or sand-blasting technology.
Depending upon the type of construction and corresponding metal alloys, the enterprise performs welding by means of automatic machines, semi-automatic welding units and manually.
To protect manufactured metal constructions against corrosion and to make them presentable they are painted by different primers, dyes, zinc.
Galvanizing is performed both by cold method and by dipping the metal constructions into hot-zinc pools
Ready-made metal constructions are used in the construction industry as bearing structures, ensuring the object strength and as various types of bridgings, railings and other products
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