"Definition of Purlins - Types, Design of Purlin Construction"
Автор: SGT University
Загружено: 2020-10-14
Просмотров: 23164
Purlins are supported either by rafters or the walls of the building. They are most commonly used in metal buildings, though they sometimes replace closely spaced rafters in wood frame structures. Purlins are manufactured from hot dipped galvanized steel with a coating, in line with other common lightweight steel structural building products. This gives good protection in most exposed internal environments. Run off from, or contact with, materials which are incompatible with zinc should be avoided. The purpose of secondary framing is to distribute loads from the building’s surfaces to the main framing and the foundation. Secondary framing can add longitudinal support that helps resist wind and earthquakes. And it can provide ateral bracing for compression flanges that are part of the primary framing, increasing overall frame capacity.
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