What each major reference actually does
Tiers and hours are the frame. Here is the read on each book, in the order our team usually introduces them to a candidate.
CHOP (Canadian Handbook of Practice)
The closest thing the ExAC has to a textbook, and the Examitect recommendation's number-one read. CHOP is not open book, so you need it in memory on test day. It shows up in Section 1 design questions, Section 3 final-project scenarios, and the entirety of Section 4 construction and practice. The high-value chapters are Chapter 6 on project initiation and design, Chapter 7 on construction documents, Chapter 8 on bidding and negotiations, Chapter 9 on construction administration, Chapter 10 on closeout, and Chapter 11 on project management. Read those carefully, then make a second pass on the rest. The CHOP study guide breaks the reading order down chapter by chapter.
CHING (Building Construction Illustrated)
The second of the two cover-to-cover reads on the Examitect recommendation. CHING is not open book either; the visual content has to live in memory. A full read pays off on Section 1 design questions and Section 2 envelope questions, where being able to picture an assembly cold is the difference between confidence and a fifty-fifty guess. If you can sketch a typical wall assembly from memory after a week with CHING, you are in a strong spot.
NBC 2020 (National Building Code of Canada)
The open-book reference for Section 2. The most important thing to understand about the NBC is that you are not going to read it through. You tab it. You drill it with scenarios. You practise finding any clause in under thirty seconds. The Part 3 versus Part 9 primer covers the applicability rule that decides which Part a Section 2 question falls under, and that single rule trips up more candidates than the rest of the code put together.
NECB 2020 (National Energy Code for Buildings)
Paired with the NBC for Section 2 energy questions, and the second tab-and-drill reference. Tab the prescriptive path, the trade-off path, and the envelope tables. The energy questions repeat patterns; once you have drilled six or seven, the format stops surprising you.
Yardsticks for Costing and RSMeans
Cost-question practice references, not chapter-by-chapter reads. Yardsticks teaches the area-based method the ExAC actually tests in Section 1. RSMeans is more granular and more useful in a working office; for prep, light familiarity is enough. The exam booklet supplies the cost tables you need on test day, so your job is to know the method by working questions, not memorise the books.
CCDC 2 and CCDC 24
The two CCDC documents that matter most for Section 4. CCDC 2 governs the owner-contractor stipulated price contract and the architect's certification role. CCDC 24 covers the architect as payment certifier, a closely related supplement. Together they take 8 to 14 hours of focused reading and are well worth it if you have the time. The CCDC 2 vs RAIC Document 6 primer covers the two-contract picture.
RAIC Document 6 and RAIC Document 9
RAIC Document 6 governs the client-architect relationship. RAIC Document 9 covers supplementary architect's services. Both are read-if-you-have-time on the Examitect recommendation. Plan 4 to 6 hours on Doc 6 and 2 to 3 hours on Doc 9, in that order.
Architect's Studio Companion
A practice-oriented reference covering the programming and design-development workflow used by working architects. It does not replace CHOP, but it adds depth to the Section 1 side of the picture and is worth a 6 to 10 hour read once the core stack is in motion. Treat it as second-pass reading, not where you start.
Architectural Graphic Standards and supporting references
These come last. AGS is a beautiful working-architect reference and there is no shame in owning it, but for ExAC prep it does not pay for the hours it asks for. Provincial readings and supplemental committee PDFs sit in the same category: pick from them based on the schedule you have left after the four tiers.