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4. Curves
4.1 Low arch
Data :
bay width: l ;
arc starting point: B ;
bow arrow: f.
Layout :
take the axis of the l/2 bay on which the center of the arc of circle C lies;
trace the horizontal line passing through B which intersects the axis at D ;
plotted on the [DA] axis = f ;
construct the perpendicular to the midpoint of [AB] which intersects the axis at C ;
draw the arc with radius R = [CA] (figure 12 ).
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Curves