Drawing A Scotia

Slide 1: Drawing a scotia (Quadrants and elliptical) _ Stonemasonry technical skills at SkillsTech Australia

Slide 2: Scotia construction: (Quadrants and elliptical) Method •Lay out a grid •Find the centre points of quadrants and their common point (confluence) •Scribe curves and add fillets at top and bottom of scotia

Slide 3: Step 1: Draw a grid of squares and mark out curve centres and confluence Quadrants

Slide 4: Step 2: Draw the first quadrant to the confluence point Quadrants

Slide 5: Step 3: Draw the second quadrant, meeting the first quadrant at the confluence point Quadrants

Slide 6: Step 4: Add fillets at top and bottom Quadrants

Slide 7: Step 5: Clean up construction lines and draw outlines Quadrants

Slide 8: Step 6: Draw a horizontal centre line, and a line at 60 to it 0 Elliptical

Slide 9: Step 7: Step off three times up and down from the centre line Elliptical

Slide 10: Step 8: Step off three times horizontally from the top and bottom, and mark the first radiating intersection point Elliptical

Slide 11: Step 9: Step off an equal amount to mark the second radiating point Elliptical

Slide 12: Step 10: Draw the first set of radiating intersection lines Elliptical

Slide 13: Step 11: Draw the second set of radiating intersection lines Elliptical

Slide 14: Step 12: Mark the points of the curve Elliptical

Slide 15: Step 13: Draw the curve freehand Elliptical

Slide 16: Step 14: Clean up the construction lines. Add fillets, and draw outlines Elliptical