- From the corner measure horizontally and make a mark at the desired box height. This is point a.
- From point a, measure horizontally the length of the desired box and make a mark. This is point b.
- From point b, measure horizontally the desired box height. Add the thickness of the blueboard being used and make a mark. This is point c.
- From point c, measure horizontally the length of the desired box. Add twice the thickness of the blueboard being used and make a mark. This is point d.
- From point d, measure horizontally the desired lid height and make a mark. This is point e.
- Returning to the starting corner, measure vertically and make a mark at the desired box height. This is point f.
- From point d, measure vertically the width of the box and make a mark. This is point g.
- From point e, measure vertically the desired box height and make a mark. This is point h.
- Draw a line from each point perpendicular to the edge. That is, points a through e will have vertical lines drawn and points f through h will have horizontal lines.
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