Complete Strategic Guide: Obtaining the RBQ 6.1 Licence – Wood Framing Contractor

1. What Is the RBQ 6.1 Licence and Who Needs It?

The RBQ 6.1 licence — Wood Framing Contractor (Entrepreneur en charpentes de bois) — is a specialized licence issued by the Régie du bâtiment du Québec (RBQ) for contractors who build, modify and renovate wood frames. It authorizes construction work involving:

• Wall frames — studs, sill plates, top plates, headers and wall sheathing;
• Floor frames — joists, beams, subflooring, bridging and cantilevers;
• Roof frames — rafters, ridge boards, hip and valley rafters, collar ties and roof sheathing;
• Roof trusses — manufactured trusses, temporary and permanent bracing;
• Fastening devices — nails, screws, joist hangers and framing anchors;
• Fire stops — blocking at concealed space junctions to limit fire and smoke spread.

With 82 skills across 4 modules and 11 competency elements, the RBQ 6.1 is the parent licence for category 6 (Wood Structures). It also covers the work included in subcategory 6.2. This licence is essential for any contractor involved in residential and light commercial wood framing across Quebec.

2. Scope of the Licence: From Sill Plates to Ridge Boards

The RBQ 6.1 covers the construction, modification and renovation of all wood frames — walls, floors, roofs, roof trusses, beams, joists, rafters and bracing. Unlike finishing trades, the 6.1 focuses on the structural skeleton of wood-frame buildings — the load-bearing system that supports everything from the foundation sill to the roof peak.

The central reference for this licence is section 9.23 of the Quebec Construction Code (National Building Code of Canada 2015). This section contains the maximum span tables for joists, rafters, beams and lintels — the foundation of nearly every calculation question on the exam. Candidates must navigate quickly between sub-sections: 9.23.3 (wall framing), 9.23.4 (floor framing), 9.23.8 to 9.23.13 (roof framing, lintels, beams). The span tables are provided at the exam, but knowing where to find the right table and how to apply corrections is the key skill.

A distinctive feature of the RBQ 6.1 is its reliance on the Canadian Wood-Frame House Construction guide (CMHC) — a practical, illustrated reference provided at the exam alongside the Construction Code and the Safety Code. This three-document open-book arsenal gives candidates substantial reference material, but efficient navigation under time pressure remains the challenge. The exam also tests the mechanical properties of visually graded lumber — grade stamps, MSR (machine stress-rated) lumber, and SPF (Spruce-Pine-Fir) grade designations — knowledge that must be memorized as it falls outside the open-book documents.

3. RBQ Exam Format: What to Expect

• Question type: Multiple choice (MCQ)
• Duration: 3 hours (180 minutes)
• Passing grade: 60%
• Languages: French or English
• Skills assessed: 82 skills across 11 competency elements
• Exam type: Mixed (3 open-book documents + 3 closed-book documents)
• Tools provided: Calculator, ruler, paper and pencil

With 82 skills and a mixed open/closed-book format, the RBQ 6.1 exam requires efficient navigation of three open-book documents and solid memorization of 3 closed-book documents. Module 4 (Standards and Work Execution) accounts for 52 of 82 skills — 63% of the exam — making it by far the most heavily weighted module.

4. Exam Documentation: Open Book vs. Closed Book

The RBQ 6.1 exam is a mixed exam with 3 documents provided (open book) and 3 to memorize (closed book) — 6 documents total.

Documents PROVIDED During the Exam (Open Book)

• Quebec Construction Code — Chapter I, Building (National Building Code of Canada 2015) — The primary technical reference for wood framing, containing the maximum span tables in section 9.23, stud dimensions, bracing rules, and fastening requirements.
• Safety Code for Construction Work (CQLR, c. S-2.1, r. 4) — Health and safety standards applicable to construction sites, including fall protection, scaffolding, and material handling.
• Canadian Wood-Frame House Construction (CMHC) — A practical, illustrated guide covering all aspects of wood-frame construction from foundations to roofing, provided as a field reference alongside the Construction Code.

Documents to MEMORIZE (Closed Book)

• Building Act (CQLR, c. B-1.1) — The foundational statute governing construction, safety, and contractor qualifications in Quebec.
• Regulation respecting the professional qualifications of contractors and owner-builders (CQLR, c. B-1.1, r. 9) — Defines the qualification requirements and conditions for obtaining a licence.
• Occupational Health and Safety Act (CQLR, c. S-2.1) — The foundational statute for workplace safety in Quebec.

5. The 4 Training and Competency Modules

Module 1 — Definitions and Types of Frames

Covers the foundational knowledge of wood framing: types of wood frames (platform framing, balloon framing, post-and-beam), structural components (studs, joists, rafters, beams, lintels, headers, sill plates, top plates), mechanical properties of visually graded lumber (grade stamps, MSR ratings, SPF grade designations), load paths in wood-frame buildings (how gravity and lateral loads are transferred from roof to foundation), and the distinction between load-bearing and non-load-bearing partitions.

Module 2 — Legislative, Normative and Regulatory Framework

Covers the regulatory framework for wood framing: the Building Act, the Quebec Construction Code (Chapter I, Building — National Building Code of Canada 2015), the Regulation respecting professional qualifications, the Safety Code for Construction Work, the OHS Act, and the CMHC Canadian Wood-Frame House Construction guide. This module tests your ability to identify which document governs which aspect of wood-frame construction work.

Module 3 — Plans and Specifications

Covers the ability to read and interpret wood framing plans: reading floor framing plans (joist layout, beam locations, bridging, cantilevers), interpreting wall framing elevations (stud spacing, header sizes, opening locations), understanding roof framing plans (rafter layout, ridge board, hip and valley intersections), reading roof truss erection plans (truss types, spacing, bracing details), performing quantity take-offs for lumber (board feet, linear metres), and interpreting specification divisions for wood framing work.

Module 4 — Standards and Work Execution (52 skills — 63%)

The most heavily weighted module on the exam. With 52 skills, this module covers: determining maximum spans from Code tables for joists, rafters, beams and lintels (section 9.23), calculating allowable deflections (1/240, 1/360, 1/420) and applying span corrections for additional dead loads (concrete topping, heavy roofing materials), determining stud dimensions and spacing for wall frames, fastening device requirements (nail length, spacing, type and quantity by location), temporary and permanent bracing of wall and roof frames, fire resistance of assemblies and fire stops at concealed space junctions, structural rules for cantilevers and load transfer for bearing partitions, and health and safety specific to wood framing (fall protection, scaffolding, material handling).

6. Key Competencies and Technical Requirements (Official Context)

Section 9.23 of the Construction Code: The Span Table Universe

Section 9.23 is the single most important section for the RBQ 6.1 exam — it is the central section for wood framing of small buildings in the Quebec Construction Code (National Building Code of Canada 2015). It contains the maximum span tables for joists (9.23.4), rafters (9.23.4), beams (9.23.4), and lintels (9.23.12), as well as the fastening requirements (9.23.3), stud dimensions for wall frames (9.23.10), bracing rules (9.23.13), and the requirements for sill plates, top plates and cantilevers. The exam tests not just your ability to read a table, but to choose the correct table based on the loading condition, species group, grade, and spacing — then apply corrections when additional dead loads are present. Candidates must be able to navigate quickly between sub-sections 9.23.3 through 9.23.13 under time pressure.

Deflection Calculations and Span Corrections

Deflection limits are a recurring calculation topic on the RBQ 6.1 exam. The Code specifies different allowable deflection ratios depending on the member type and its finish: 1/360 for floor joists supporting plaster or ceramic tile, 1/240 for floor joists with flexible finishes, and 1/180 for roof members. The exam requires candidates to determine maximum allowable deflection for a given span, then compare it against the deflection produced by the specified loads. Additionally, the span tables assume specific dead loads — when the actual dead load exceeds the table assumption (e.g., concrete topping on a floor, heavy roofing materials), candidates must apply span correction factors that reduce the allowable span. Prof-RBQ.ca includes targeted exercises on these calculations.

Fastening Devices: The Nailing Schedule

Fastening is one of the most detail-intensive topics in wood framing — and the exam tests it thoroughly. The Construction Code specifies the type, length, spacing, and quantity of fasteners for every connection in a wood frame: joist-to-sill plate, stud-to-plate, sheathing-to-stud, rafter-to-top plate, and subflooring-to-joist. Common fastener types include common nails, spiral nails, ring-shank nails, and proprietary connectors (joist hangers, hurricane ties, framing angles). The exam may ask for the minimum nail length for a given connection, the maximum spacing of nails on sheathing panels, or the number of nails required at a specific joint. Section 9.23.3 of the Code — provided at the exam — contains these requirements, but candidates must know how to find the right table row quickly.

Temporary and Permanent Bracing

Bracing is critical for both safety during construction and long-term structural performance. Temporary bracing holds wall and roof frames plumb and stable until sheathing, permanent bracing, and connections are completed — without it, an erected wall frame can collapse under its own weight or a gust of wind. Permanent bracing includes diagonal let-in bracing, structural sheathing panels (OSB or plywood), and metal bracing straps. For roof trusses, the exam specifically tests the erection bracing sequence — trusses must be braced laterally at top chord, bottom chord, and web members at specified intervals until the roof sheathing is installed. The CMHC guide (open book) provides practical illustrations of bracing layouts that complement the Code requirements.

Fire Stops at Concealed Space Junctions

Fire stopping is a unique competency for wood framing that directly relates to life safety. In platform framing, each floor acts as a natural fire stop — but wherever concealed spaces connect vertically (e.g., balloon-framed walls, dropped ceilings meeting exterior walls, soffits connecting to attic spaces), the Code requires fire stops — tight-fitting blocking of wood, sheet metal, or other approved materials that prevent fire and hot gases from spreading through concealed pathways. The exam tests candidates on fire stop locations (which junctions require blocking), acceptable materials (minimum thickness of wood, type of sheet metal), and the fire resistance rating of wood-frame assemblies. This is a memorization-heavy topic because the specific fire stop locations are in the Code but must be recognized from plan reading questions.

Visually Graded Lumber: Grade Stamps, MSR and SPF

Understanding lumber grading is essential for selecting the correct table in section 9.23 — the span tables are organized by species group and grade. Visually graded lumber is classified by defects visible to a trained grader: knots, slope of grain, wane, checks, and splits. The common species group in Quebec is SPF (Spruce-Pine-Fir), available in grades such as Select Structural, No. 1, No. 2, and Stud. MSR (Machine Stress-Rated) lumber is tested mechanically and assigned a specific bending strength value (e.g., 1650f-1.5E). The grade stamp on each piece of lumber identifies the species group, grade, mill number, and grading agency. This knowledge is closed-book — candidates must memorize grade designations and their relationship to the span tables to select the correct row in the open-book Code.

7. Preparation Strategy and Tips for Success

The RBQ 6.1 exam covers 82 skills across 4 modules with 3 open-book and 3 closed-book documents. Here is a recommended strategy:

Phase 1 — Master the span tables in section 9.23 (provided at the exam). This is the key to the calculation questions. Focus on sub-sections 9.23.3 through 9.23.13: joist spans, rafter spans, beam spans, lintel spans, stud dimensions, and fastening requirements. Practice selecting the correct table based on species group, grade, spacing, and loading condition — then applying span corrections for additional dead loads.

Phase 2 — Dominate Module 4 (Standards and Work Execution). With 52 skills (63% of the exam), this module covers the entire framing workflow. Focus on deflection calculations (1/240, 1/360, 1/420), fastening schedules, temporary bracing of walls and trusses, fire stops, cantilever rules, and load transfer for bearing partitions — these are the highest-yield topics.

Phase 3 — Use the CMHC guide strategically. The Canadian Wood-Frame House Construction guide is provided at the exam and contains practical illustrations that complement the Code tables. Familiarize yourself with its chapter structure so you can quickly find framing details, bracing layouts, and construction sequences during the exam.

Phase 4 — Memorize the 3 closed-book documents. The Building Act, the Professional Qualifications Regulation, and the OHS Act must be memorized. Focus on the key articles: contractor obligations, licence categories, and worker safety rights. Use Prof-RBQ.ca's flashcards to retain the essential provisions.

Phase 5 — Complete full timed simulations. With 82 skills and 3 open-book documents, you have roughly 132 seconds per question. Practice navigating between the Construction Code, the Safety Code, and the CMHC guide under timed conditions to build speed and confidence.

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