Open a new part and select the Front plane.
Click Line
(Sketch toolbar),
and coincident with the origin, sketch a horizontal line.
Click Smart
Dimension 
(Dimensions/Relations
toolbar), and dimension the line to 76.
Open a new part and select the Front plane.
Click Line
(Sketch toolbar),
and coincident with the origin, sketch a horizontal line.
Click Smart
Dimension (Dimensions/Relations
toolbar), and dimension the line to 76.
Although dimensions are not required in this
layout sketch, you add one dimension as a reference to proportion the
rest of the sketch. This allows you to insert another compatibly-sized
block in the sketch. Later, when you build the crane, you learn how to
scale blocks.
Click Line
(Sketch toolbar),
and using inferences as you sketch, add three non-parallel and non-perpendicular
sketch entities.
As you drag the pointer, the line length updates dynamically.
Press Esc to clear the tool, and click in the graphics area to clear the selection.
