Firestopping mechanical, electrical, and plumbing (MEP) penetrations through fire-rated assemblies in Alberta homes demands drawing precision, explicit code references, and clear documentation of tested systems. Every phase-from initial plan sheets to on-site installations-relies on a robust integration of Alberta Building Code requirements, manufacturer listings, and jobsite-verifiable call-outs.

Drafting ABC Part 3 & 9 Code References and FRR Indications on Fire Separation Plan Sheets

Explicit Code Annotations and Fire Resistance Rating Labelling

On fire separation plan sheets for Alberta residential projects, each wall, floor, or shaft with a fire-resistance requirement must be called out with its fire-resistance rating (FRR) and referenced to the precise Alberta Building Code (NBC(AE)) article. General notes, section call-outs, and legends should refer directly to the relevant code sections:

  • 3.1.8.1. Fire Separations: “All fire separations to comply with NBC(AE) Article 3.1.8.1., with fire-resistance ratings as specified on the drawings.”
  • 9.10.9.1. Protection of Openings: “Openings in fire separations to be protected per NBC(AE) Article 9.10.9.1.”
  • 9.10.8.1. Floors and Roofs & 9.10.8.3. Walls: “See assembly schedule for required ratings per NBC(AE) Article 9.10.8.X.”

Fire separations must not only be dimensioned, but also graphically identified with standard symbols. A solid line with a “1 HR” label is used for 1-hour rated walls; a dashed line with “45 MIN” identifies 45-minute assemblies. These conventions are cross-referenced in legends, and assembly details in section views point to specific sheet/drawing numbers:

  • Example Call-Out: “1 HR FIRE RATED WALL - SEE 4/A6.1”
  • General Note Example: “Refer to wall assembly schedule for fire-resistance rating and construction per NBC(AE).”

Referencing Local Amendments and City Standards

The National Building Code - Alberta Edition incorporates unique local requirements, such as encapsulated mass timber fire safety. Documents like the City of Calgary Fire Safety Plan Guidelines may further influence permissible assembly types or details during construction. Local permit reviewers scrutinize plan sheets to ensure Alberta-specific amendments are not overlooked.

Addressing Common Plan-Review Deficiencies on FRRs

Missing or unclear FRR call-outs are a frequent review redline. Commentary typically notes:

  • “FRR not labelled for south corridor wall-add 1-hour rating symbol and reference detail.”
  • “No ABC reference for shaft enclosure; clarify compliance with NBC(AE) 3.1.8.1.”
  • “Nonstandard symbol for 45-min wall; use dash with '45 MIN' annotation in legend.”

Specifying assembly dimensional build-ups is key. For example: 1-hour gypsum-framed walls require two layers of 12.7 mm Type X each side, mineral wool in cavity, and full height continuity.

Developing Dimensioned Firestopping Details for Common MEP Penetrations

Creating Scalable, Tested Assembly Details

Each MEP penetration through fire-rated assemblies (walls, floors, shafts) must be identified with a dimensioned detail reflecting a tested firestop system for the exact wall or floor construction and type/size of service.

  • Single Metallic Pipe Through 1-Hr Gypsum: Typical dimension calls for a 25 mm (1") maximum annular space, with a specified bead of 19 mm (3/4") firestop sealant, backed by 64 mm (2-1/2") depth mineral wool, firestop manufacturer and listing labelled directly on the detail.
  • Multiple Plastic Pipes Through 45-Min Wood Floor: Plastic (combustible) penetrations require intumescent collars or wraps per the tested system, annular space typically 13-19 mm (1/2"-3/4") depending on system, detail to show collar fastener location, sealant bead depth and backing.
  • Cable Tray Through 2-Hr Concrete Wall: Detail shows opening size, tray dimensions, mineral wool packing (usually full wall thickness minus 25 mm, per tested system), and a 13 mm (1/2") depth fire-rated sealant at both wall faces, reference to system number (e.g., “Refer to UL W-L-XXXXX”).

Labelling F-rating and T-rating Requirements

Every through-penetration firestop detail must explicitly denote both the F-rating (flame resistance) and, where applicable, the T-rating (temperature rise):

  • “F Rating not less than 1 hour, T Rating not less than 1 hour, per CAN/ULC-S115.”

Section 3.1.9.1. of the NBC(AE) requires the F-rating to match the assembly rating. Where the T-rating is not required by code (as is common in residential low-rise), note it as “N/A unless otherwise required by AHJ.”

Annular Space, Sealant Bead, and Backing Details

Dimensioned details must match the firestop system’s tested specifications:

  • Annular Space: Clearly state min/max values: e.g., “ANNULAR SPACE: Min 6 mm (1/4"), Max 25 mm (1") as tested.”
  • Sealant Bead: “Apply 19 mm (3/4") depth intumescent sealant, both sides, as per UL System CAJ7034.”
  • Backing: “Pack opening with mineral wool, minimum 64 mm depth.”

Material tags and leader lines on each detail reference the exact model/type.

Plan Review and On-site Coordination Issues

Reviews often flag undocumented penetrations (“No firestop detail for cable bundle south wall office-submit tested system.”) or generic sealant spec (“Specify UL-listed system for ABS penetration; general fire caulk not accepted.”). Coordinating detail numbers with the plan key, and ensuring each fire separation is notated for penetrations, is expected during Alberta reviews.

Integrating Manufacturer-Specific Firestop System Specifications and UL/cUL Listed Assemblies into Drawing Sets

Direct Specification of UL/cUL Systems and Proprietary Materials

Drawings must specify manufacturer, product, and listing number for every firestop system:

  • “Install firestop per 3M Fire Barrier RC-1, UL System W-L-1234 for 2” copper pipe through 1-hr fire-rated gypsum wall.”
  • “ABS pipe penetration firestopped with Hilti CP 643N collar, installed per UL System C-AJ-1651.”

Systems are referenced both in detail call-outs and schedule format. For each penetrant:

  • Location ID
  • Assembly Type (e.g., 1-hour wall, 2-hour floor)
  • Penetrant Type/Size (e.g., 32 mm ABS, 102 mm steel duct)
  • Firestop System (e.g., STI SpecSeal SSS Sealant, UL Classified W-L-3145)
  • F-/T-rating as required

Engineering Judgments for Field Conditions

Where a field condition deviates from tested systems-for example, oversized holes, odd angles, or clustered penetrants-a formally issued Engineering Judgment (EJ) must be referenced within the drawing set:

  • “Firestop penetration per Hilti Engineering Judgment EJ-4037 (included in appendix to this set).”

EJs are stamped, job-specific documents provided by the firestop manufacturer, showing exact materials, installation sequence, and limitations. It is essential to attach the EJ in the drawing set and provide a detail cross-reference wherever the EJ applies.

Material Schedule and Coordination with Specifications

A “Firestopping Schedule” table is typically provided, listing:

  • All penetrations by location and type
  • Assembly - their individual FRR (e.g., 1 Hr, 2 Hr)
  • Specified firestop system name and exact UL/cUL or CAN/ULC listing number
  • Manufacturer, product series, install notes (“Sealant depth per listing; pack with min. 32 kg/m3 mineral wool backing”)

General notes will further direct: “No substitutions permitted without written approval from project architect and authority having jurisdiction.”

Typical Plan Review Redlines Related to Listing Details

  • “Specify UL/cUL system number on all firestop details.”
  • “Provide Engineering Judgment for bundled wires at corridor wall-not covered under submitted Hilti W-L-1054.”
  • “Material schedule missing manufacturer's listing; products must be traceable to tested system.”

The expectation is system-specific clarity on all drawings, substantiated by documentation physically in the permit submittal set.

Anticipating Plan Review Redlines and Drafting Jobsite Compliance Call-Outs for Firestopping

Pre-empting Common Deficiencies at Drawing Stage

Reviewers repeatedly flag the following for firestopping:

  • Omitted firestop details for unique penetrant types or locations (“No firestop at main gas line-provide system detail or engineer’s letter.”)
  • Mismatch between assembly FRR and firestop system (“Proposed detail for plastic pipe is 1 hr, but floor assembly is 2 hr-revise or submit 2-hr listed system.”)
  • Annular space outside tested limits (“Annular space exceeds max per system cUL/UL listing; provide oversized opening approval or patch opening.”)
  • Lack of reference to specific tested system or installation method (“Specify system and confirm installation per detail XX-XX; ‘fire caulk’ alone not acceptable.”)

Drawing-Sheet Call-Outs for On-site Inspector Verification

Proactive notes alert the contractor and inspector to mandatory field verifications. Examples include:

  • “Confirm UL-listed system installation per Detail 7/A6.2; verify all requirements met prior to concealment.”
  • “Inspector to check sealant depth-min. 19 mm per listing for metallic penetrations, both faces.”
  • “Annular space at all penetrations shall be maintained within 6-25 mm per the approved firestop system-field verify prior to sealant.”
  • “Any deviations to be submitted as Engineering Judgment with AHJ approval before concealment.”

Section and key plan symbols direct attention to all firestopping points, reducing the risk of unsealed or incorrectly sealed penetrations missed in construction.

Ensuring Material and Assembly Compatibility

Material schedules and details must account for assembly type, penetration type, and interaction. For instance, mineral wool density, firestop sealant thickness, and collar type must all be validated for compatibility-not just “fire rated”-to the exact product and listing.

Detailing Nuances for Combustible vs. Non-Combustible MEP Services and Varying FRR Assembly Types

Combustible Penetrations-Intumescent Measures and Critical Detailing

Penetrations by combustible piping or services (ABS, PVC) require firestop measures that expand and seal during a fire. Typical detail conventions:

  • Intumescent Collars: “Install 3M fire collar model FC-222 for 76 mm PVC; secure with min. 3 steel anchors at 120° spacing, align collar flush with finished surface.”
  • Fire-Resistive Wraps: “Apply 2 layers of Hilti FS-195 wrap strip, 25 mm width, tightly around ABS pipe prior to sealing annular space.”
  • Sealants: “Fill annular space with 19 mm of intumescent sealant (Hilti FS-One Max), back with min. 64 mm mineral wool as per system W-L-1324.”

Combustible penetrants cannot be firestopped using nonintumescent product; if the wrong product is specified, plan review will reject the detail.

Non-Combustible Penetrations-Sealant-Only and Mortar Options

For penetrations such as steel pipe, copper pipe, EMT conduit, and metal ducts in gypsum, wood, or concrete fire separations:

  • Mineral wool backer, 32-64 mm depth; sealant bead, typically 13-25 mm depending on tested system (“Pack opening full depth with mineral wool and apply 19 mm non-intumescent firestop sealant both faces”).
  • Concrete floor penetrations may use sleeves filled with firestop mortar, per system details and NBC(AE) requirements for non-combustible assemblies.

Flexible conduits require systems tested for movement and deflection-including expansion joint detail, and increased inspection notes.

Ducts, Cable Trays, and Multiple Penetrant Scenarios

Metal ducts require fire damper call-outs where duct penetrates rated walls (“Provide 1-hr listed galvanized damper, UL555 classified, see 5/A8.4”). Cable trays and bundles involve combination systems (mineral wool plus firestop sealant), annular space as per listing, and are detailed with “Multiple Penetrant System-see UL W-J-5020.”

Assembly Types and Associated Detailing Techniques

  • Gypsum Board Walls: Details show layered Type X board, vertical continuity to deck, mineral wool backer at service cavity. Details must specify “Sealant and packing to match wall thickness, min. 89 mm.”
  • Concrete Slabs: Cast-in-place sleeve or device noted in plan and section, “Fire caulk min. 19 mm, both faces,” and bead shape tested for system in question.
  • Wood I-joist Floors: Special care to preserve assembly rating, typically with additional wrap or collar, system must be specifically listed for wood floor construction. Drawing notes, “No field substitutions; EJ required if manufacturer standard not applicable.”

All details are cross-referenced with system listing schedules: e.g., “Firestop System: STI SSW Red, UL W-L-5031, 1-hr, ABS in wood I-joist.”

Typical Dimensions and Material Specs Per System/Assembly Type

  • Annular Space: 6-25 mm (refer to tested system; oversize requires patch or EJ)
  • Sealant Depth: 13-25 mm (system-specific)
  • Mineral Wool: 32-64 mm depth, 32-64 kg/m³ density typical
  • Collar/Wrap: per manufacturer, number of wraps/layers or collar model/anchor detail specifically called out
  • All firestop products to be UL/cUL/CAN/ULC listed for installation condition and penetrant type

Systems are dimensioned in both plan and enlarged section, tagged to “Firestopping Schedules.”

Ensuring Integrated Drawings for Firestopping Coordination and Approval in Alberta

Establishing a Traceable, Reviewable, and Buildable Record

Proper integration of all the above strategies produces plan sheets and detail sets that are review-ready and jobsite-compliant:

  • Every fire separation (as per NBC(AE) 3.1.8.1., 9.10.8.X) is labelled in both plan and section, with explicit fire-resistance annotation and legend reference.
  • MEP penetrations are dimensioned, detailed, and matched in the “Firestopping Schedule” to manufacturer-tested systems, UL/cUL/CAN/ULC listing numbers, and product specs; deviations require attached EJs and jobsite notes “Call inspector prior to concealment.”
  • Combustible and non-combustible penetrants are distinguished by firestop method (intumescent collar, standard fire caulk, mortar, etc.), with assembly compliance directly connected to tested system dimensions/materials.
  • Each detail, call-out, and schedule is internally cross-referenced (“See Detail 8/A10.3”), with all code references and manufacturer documentation included in the submission set for review, installation, and inspection.

This methodology ensures clarity for all parties during review, approval, and construction phases, reducing redlines, field RFIs, and costly rework.

Kingsway Drafting & Design delivers construction-ready, code-driven drawings that ensure Alberta’s homes achieve full firestopping compliance at every penetration.