RBQ 4.1 — Contractor in masonry structures: preparing for the qualification exam
The 4.1 — Contractor in masonry structures subclass authorizes structural masonry and exterior masonry veneer walls. This page presents the scope of the licence, the format of the Régie du bâtiment du Québec (RBQ) exam, and how Prof-RBQ.ca prepares you for it.
1. What is the 4.1 licence and who needs it?
The contractor-in-masonry-structures licence is for the contractor who carries out or supervises load-bearing masonry and exterior masonry cladding: load-bearing walls in concrete block or brick, veneers, cavity walls, lintels, and site-built chimneys and open fireplaces. A candidate who passes the exam can act as the designated officer for the execution of this subclass of work with the RBQ.
2. Scope: the authorized work
- Structural masonry and exterior masonry veneer walls.
- The construction work included in subclass 4.2 of Schedule III.
- Similar or related construction work.
3. RBQ exam format
- Duration: 3 hours
- Pass mark: 60%
- Type: multiple-choice questions
- Language: French or English
- Competency structure: 4 modules, 12 competency elements, 99 skills
4. A partially open-book exam
An important feature of the 4.1 exam: two documents are provided and may be consulted during the exam. For those, the challenge is knowing how to navigate and quickly locate the right article. Everything else must be memorized.
Documents provided at the exam (open book)
- Construction Code, Chapter I – Building (CQLR, c. B-1.1, r. 2) — Part 9: foundations (9.15), masonry (9.20), chimneys (9.21), open fireplaces (9.22).
- Safety Code for the construction industry (CQLR, c. S-2.1, r. 4) — scaffolds (s. 3.9), fall protection (s. 2.9, 3.8, 2.10.12).
Recommended documents to master (closed book)
- Building Act (CQLR, c. B-1.1) and the Regulation respecting the professional qualification of contractors (r. 9).
- CSA masonry standards: CSA A371 (masonry construction for buildings), A179 (mortar and grout for unit masonry), A165 (concrete masonry units and brick), A82 (fired masonry brick from clay or shale), A370 (connectors), A405 (masonry chimneys and fireplaces).
5. The competency modules
- Module 1 — Definitions and types of structures: live load, dead load, bearing area, allowable deflection, lime and mortar types (M, N, S, O, R), lateral loads, bracing and stability.
- Module 2 — Legislative, normative and regulatory framework: the Construction Code, the role of the CSA, masonry standards and incorporation by reference.
- Module 3 — Plans and specifications: reading plans, symbols, dimensions and sections, veneers, quantity takeoff and Division 04 — Masonry.
- Module 4 — Standards and execution of the work: foundations, above-grade masonry, chimneys and fireplaces, quality control and health and safety.
6. Key skills and technical context
Choosing the mortar is not a detail
Standard CSA A179 defines mortar types M, N, S and O (plus type R for repointing). You do not simply pick "the strongest everywhere": type M suits work below grade, S resists lateral loads, N is for ordinary above-grade walls, and O for interior non-load-bearing work. A mortar that is too rigid can damage softer units.
Masonry resists lateral forces poorly
Strong in compression but weak in tension and bending, masonry must be stabilized: lateral supports at the top of walls, anchorage (Construction Code 9.20.11), bonding and ties (9.20.9), joint reinforcement and reinforced masonry (9.20.15). This is at the heart of plan reading and execution.
Chimneys and fireplaces: the signature of the 4.1
Site-built chimneys (Construction Code 9.21) and open fireplaces (9.22) require walls of standardized thickness, a refractory lining, clearances to combustible materials and a compliant cap — complemented by standard CSA A405.
Quantity takeoff, a numerical skill
Estimating a block order means computing the net wall area and dividing by the unit module (a 390 × 190 mm block with a 10 mm joint covers 0.08 m², i.e. 12.5 blocks/m²), then adding a waste allowance.
7. Preparation strategy
Two winning habits: memorize the material that is not provided (mortars, CSA standards, the legal framework, takeoff calculations) and practise locating the articles in the Construction Code and the Safety Code, which may be consulted in the exam room. The Prof-RBQ.ca question banks reproduce the reading traps, jobsite scenarios and "best answer / first action" questions of the actual exam.
8. Why Prof-RBQ.ca
Prof-RBQ.ca designs preparation courses anchored on the official RBQ competency profile: lessons structured by competency element, technical diagrams, a multiple-choice question bank and revision flashcards, in both French and English versions.
Frequently asked questions
Is the 4.1 subclass exam open book?
It is partially open book: the Construction Code, Chapter I – Building and the Safety Code for the construction industry are provided and may be consulted. The CSA standards, the legal framework and the calculations must be memorized.
How long is the exam and what is the pass mark?
The exam lasts 3 hours, uses multiple-choice questions, and the pass mark is 60%. It can be taken in French or in English.
What work does the 4.1 licence authorize?
Structural masonry and exterior masonry veneer walls, the work of subclass 4.2 (Schedule III), and similar or related construction work.
Which CSA standards must I know for masonry?
Mainly CSA A371 (masonry construction for buildings), A179 (mortar and grout for unit masonry), A165 (concrete masonry units and brick), A82 (fired masonry brick from clay or shale), A370 (connectors) and A405 (chimneys and fireplaces).
Does the 4.1 cover chimneys and fireplaces?
Yes. Site building of masonry chimneys (Construction Code 9.21) and open fireplaces (9.22) is an integral part of the competency profile, together with standard CSA A405.
