Johnson-level-tool-mfg RAS-1 Manual do Utilizador descarregar pdf (Página 29)

roof. For a pitched roof, use the angle scale and make your

marknexttotheanglethatistheresultoftheroofinchrise

angle minus the overhang inch rise angle.

DEGREE SCALE

With the degree scale on our square, any angle can be found

onaboard.Figure16showsacoupleofexamples.Tondan

obtuseangle,forexample105°,putthepivotpointonthe

mark where the cut is to be made. Lay the square so that the

“T”barisheldtightagainsttheboardanddrawaperpendicu-

lar line across the board. Now ﬂop the square on its opposite

side(makingsureyou’reusingthesamepivotpoint)andpivot

thesquaresothedegreescalereads15°(105°-90°).Scribing

a line along the bottom edge of the square now gives you a

105°angle(andalsoa75°angleanda15°angle).

FIG. 16 Resulting Angles Using the Degree Scale on a Board.

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Johnson-level-tool-mfg RAS-1 Manual do Utilizador Página 29