Johnson-level-tool-mfg RAS-1 Manuel d'utilisateur télécharger pdf (Page 37)

FIG. 20 A Rafter Support Structure for Solar Panels.

Now ﬁnd the support rafter rise and run by using the

tables somewhat in reverse from the way you have done

so far. First ﬁnd the proper table for your support rafter

inch rise and locate your length under the common rafter

lengthcolumn(note:youmayhavetorefertoboththe

Run(ft.)columnplustheRun(inch)columninreferringto

thecorrectlength).Inourexampleweneeda50"or4'2"

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Johnson-level-tool-mfg RAS-1 Manuel d'utilisateur Page 37