TrackBeginner to intermediateExam opens 4 Jan
Reading drawings and specifications
How to read a real drawing set the way the people who build from it do: the title block and the engineer's seal, scales, legends, plans, sections and details, the general notes, the specification and how it turns into quantities, and what to do when the drawings and the model disagree. Taught on a real, public-domain construction set (the Benton Street Bridge, 1947–48) and a teaching sheet of the clinic. Ends with an exam and a certificate.
3 chapters · 8 lessons · about 48 minutes
Finish all 8 lessons to download a certificate of completion.
Chapter 1. Reading the sheet
0/3 done- 1.1 Anatomy of a drawing setA drawing set is read from the outside in: the list of drawings, then each sheet's title block, then the drawing itself. The title block tells you what the sheet is, who is responsible for it, which revision it is and whether you may build from it.
- 1.2 Scales, lines and legendsBefore you read what a drawing says, learn how it says it: the scale of each view, what each line type means, the symbols and abbreviations, and the legend that defines them for this set.
- 1.3 Plans, sections and detailsA structure is described by views that each show part of the truth: plans from above, elevations from the side, sections cut through it, and details at larger scale. Reading a set means moving between them and checking that they agree.
- Chapter recap
Chapter 2. The words behind the drawing
0/3 done- 2.1 General notesThe notes on a drawing set are where the designer writes what can't be drawn: design standards, material grades, loads, tolerances, sequences and workmanship. They apply to every sheet they cover, and they are the part of a set most often skipped.
- 2.2 Reading specificationsThe specification is the written half of the design: what materials must be, how work is done and checked, and how it is measured and paid. Drawings say where and how big; the specification says what and how well.
- 2.3 From specification to quantitiesQuantities are where drawings, specification and model meet money. Each specified material or grade becomes its own quantity line, measured the way the measurement rules say, and the model can only produce it if its elements carry the right properties.
- Chapter recap
Chapter 3. When drawings and models disagree
0/2 done- 3.1 Drawings against the modelDrawings are exported from the model, then often edited by hand: a dimension overridden, a tag typed, a wall drawn with lines, a room renamed. Each edit makes the sheet say something the model doesn't. Finding those differences before they reach site is one of a coordinator's most useful checks.
- 3.2 Revisions and transmittalsDrawings change. A revision records what changed, when and by whom; clouds and triangles show where on the sheet; a transmittal records who was sent which revision. Together they let anyone prove which version they built from.
- Chapter recap
The exam opens on 4 JanA new track exam opens every week. Finish the lessons now and you’ll be ready on the day; the certificate goes on your LinkedIn profile.The release calendar →
Your learning route
Each station is a chapter; completed lessons are ticked.
- 1Reading the sheetChapter 1 · 3 lessons
- 2The words behind the drawingChapter 2 · 3 lessons
- 3When drawings and models disagreeChapter 3 · 2 lessons