Roof construction with stabilized Z-purlins
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United States of America Patent
Stats
-
Oct 11, 1983
Issued Date -
N/A
app pub date -
Apr 2, 1979
filing date -
Oct 25, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A roof construction having at least one roof slope is disclosed wherein at least four Z-purlins are laid across and secured to a number of rafters on the roof slope in a building and the roof deck is then secured on top of the Z-purlins. Tendencies toward Z-purlin roll over failure are counter balanced when at least two of the Z-purlins on the roof slope are oriented to face downwardly of the roof slope and at least two of the Z-purlins on the roof slope are oriented to face upwardly of the roof slope. The downwardly and upwardly oriented Z-purlins may be arranged in pairs of adjacent Z-purlins, each pair comprising one upwardly and one downwardly facing Z-purlin, or so that Z-purlins of one group face upwardly and Z-purlins of the other group face downwardly. The Z-purlins are stabilized by means of stiffeners secured to the purlins at bearing points and by means of tie straps extending between adjacent purlins.
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Cited Art Landscape
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