Sections- Half, Offset, Revolved, Removed
I continue our discussion on technical drawing sections by moving beyond the full section. I start by demonstrating the Half Section , where we cut away only a quarter of the view to show both the exterior and interior simultaneously [00:26]. Next, I explain the Offset Section , which uses 90-degree jogs in the cutting plane line to pass through multiple features that aren't aligned, emphasizing that you treat the cut surface as one solid piece without showing the jog lines in the sectioned view [02:14]. A key rule I cover is how to properly draw a section through a web or rib by leaving the thin feature unsectioned, as sectioning it would misleadingly suggest a solid block of material [06:12]. Finally, I detail the difference between a Revolved Section (in place) and a Removed Section (taken out and placed elsewhere) to show the true cross-sectional shape of an object [09:45], and I finish by showing how to use Break Lines to shorten long parts for a better fit and clearer detail on the drawing sheet [15:44].
Video Chapters
[00:26] Introduction to the Half Section
[02:14] Explanation of Offset Sections and using 90-degree jogs
[06:12] Sectioning through a Web or Rib (and why we don't section them)
[09:45] How to draw a Revolved Section (section in place)
[14:11] The purpose and placement of Removed Sections (section out of place)
[15:44] Using Short and Long Break Lines to shorten a drawing