“Seismic connectors” is broad buyer language for components or connection details that restrain or accommodate movement in building elements, including non-structural interior partitions. For an Ontario project, do not select a connector from the keyword alone: confirm the required movement direction and displacement, substrate, framing layout, fasteners, clearances, drawings, specifications, and engineer-approved detail first.
What “seismic connectors” means in interior framing
In interior framing, seismic connectors are part of a designed attachment or restraint assembly. The assembly may include steel studs, track, clips, anchors, braces, fasteners, or a head-of-wall detail that allows the partition to respond to building movement without transferring unintended forces into the wall or surrounding construction.
The phrase does not identify one universal Ontario product category. Project documents may instead use terms such as seismic attachment, lateral restraint, non-structural component connection, head-of-wall connection, deflection accommodation, or engineered clip and connector detail.
A standard framing clip, slotted track, or connector may be useful in a movement detail, but its name alone does not establish a seismic rating, movement capacity, spacing, fastener requirement, or suitability for a particular partition.
The Ontario code and design context
Ontario’s 2024 Building Code came into effect on January 1, 2025. The current code framework and the project’s approved drawings and specifications should control the design review for seismic attachment and restraint.
For Part 4 building design, Ontario identifies seismic hazard values through the 2020 National Building Code of Canada Seismic Hazard Tool. The values depend on site location and site designation, so a generic movement allowance cannot replace the project’s design criteria. See the official seismic hazard data guidance for the applicable context.
Some regulated connections of non-structural elements also have specific requirements. Ontario’s Building Code regulation states, for applicable connection conditions, that friction from gravity loads must not be treated as resistance to seismic forces. Review the relevant Ontario Building Code connection requirements with the project design team.
These references do not form a complete design method for every interior partition. The engineer of record, structural drawings, architectural details, specifications, and approved project conditions determine the final connection detail.
Connector, joint, cable, track, or clip: which role are you solving?
The terms below describe different functions. Some identify products, while others describe a gap, assembly, or engineered condition. Treating them as interchangeable can lead to unsuitable substitutions.
| Term | Primary role | What it does not establish | Confirm before selection |
|---|---|---|---|
| Seismic connector | Connects, restrains, or accommodates movement between building elements as part of a designed detail. | It does not establish a universal movement range or code approval. | Movement direction, displacement, load path, substrate, fasteners, clearances, and approved product data. |
| Seismic joint | Separates portions of a building or assembly so relative movement can occur across the joint. | It is not automatically a connector or wall attachment. | Joint location, expected relative movement, fire and acoustic requirements, cover or trim, and the complete detail. |
| Expansion joint | Provides planned separation for thermal, shrinkage, settlement, or other building movement. | It is not automatically designed for earthquake movement. | The movement case addressed by the detail and whether seismic movement is included. |
| Seismic cable | May provide restraint or support in a particular building system as part of a cable-based assembly. | It is not a universal substitute for a rigid connector, brace, or partition head detail. | Application, cable geometry, anchorage, pretension or slack, clearance, and approved installation detail. |
| Slotted deflection track | Can provide a framing interface intended to accommodate specified movement at the head or base of a wall. | It does not automatically provide lateral restraint or satisfy a seismic design requirement. | Vertical movement, lateral stability, stud engagement, slot geometry, fasteners, clearances, and approval. |
| Framing clip | Connects or supports framing members at a particular location. | A general clip name does not prove seismic capacity or multi-directional movement capability. | Geometry, material, loads, attachment surfaces, fasteners, movement, spacing, and documentation. |
How does a seismic joint work?
A seismic joint creates deliberate separation between elements that may move relative to one another. It provides a controlled location for movement, while surrounding cover, firestop, acoustic treatment, and finish details must remain compatible.
What is seismic cable?
Seismic cable is a cable-based restraint or support component used only where its anchorage, geometry, capacity, and installation method have been designed. It should not replace a connector, brace, or partition detail unless the project documents accept the substitution.
What is the difference between an expansion joint and a seismic joint?
An expansion joint generally addresses a defined movement such as thermal expansion, shrinkage, or settlement. A seismic joint addresses relative movement associated with seismic response. The movement case and design criteria must be stated instead of inferred from the joint name.
The six inputs that determine the right connection detail
Start with the movement problem, not the product catalogue. These six inputs turn a broad request for “seismic connectors” into a technically reviewable connection requirement.
1. Identify the wall and framing role
Confirm whether the partition is non-load-bearing, load-bearing, shaftwall, exterior-related, or part of another assembly. Record the stud type, gauge or thickness, track type, wall height, stud spacing, board layers, and any bridging or bracing shown in the documents.
2. Define the movement direction
Ask which movement the detail must address: lateral, vertical, in-plane, out-of-plane, or a combination. A head-of-wall detail that accommodates vertical building movement solves a different problem from a connection that restrains a tall partition against out-of-plane movement.
3. Obtain the required displacement
The required displacement must come from project design criteria, drawings, specifications, or an engineer-approved detail. It should state the direction and whether the value applies to the connector, joint, partition, or complete assembly.
If the documents give only a general seismic designation without a usable connection movement requirement, ask the design team to define the criteria before ordering. There is no responsible universal movement allowance for every interior partition.
4. Confirm the substrate and attachment zones
Identify whether the connection attaches to concrete, structural steel, a deck, wall, beam, ceiling system, or another framing member. Confirm the available attachment zone, edge distances, thickness, reinforcing conflicts, and whether the substrate accepts the specified fastener or anchor.
5. Coordinate the framing and board geometry
Check how the connection interacts with the stud web, flanges, track, gypsum board, insulation, services, ceiling grid, firestop, and adjacent construction. The detail must leave the required movement path open while maintaining the wall’s alignment and finish conditions.
6. Verify fasteners, clearances, exposure, and documentation
Record the specified fastener type, diameter or size, embedment, edge distance, spacing, and installation direction. Also confirm corrosion or exposure conditions, fire and acoustic requirements, inspection points, and required approval documents.
How to read the drawings and specification before requesting a quote
Structural drawings may contain design criteria or attachment requirements. Architectural drawings may show partition heights, head conditions, joints, and finish interfaces. Partition schedules and specifications may control materials, fasteners, testing, submittals, and approved substitutions.
- Performance requirement: what the connection must resist or accommodate, including movement direction and design displacement.
- Named product or system: the component or assembly identified by the project documents.
- Engineered detail: the drawing, calculation, or design instruction defining how the product connects to the structure and framing.
A named product without an attachment detail may not be enough for procurement. A performance requirement may permit an alternate, but only after the responsible design team reviews and accepts the change.
Questions to resolve before the RFQ
- Which partition and wall type require restraint or movement accommodation?
- What movement directions and design displacement govern?
- Where is the connection attached, and what substrate is available?
- Which studs, track, clips, braces, anchors, and fasteners are shown?
- What clearances must remain open after board, insulation, services, and finishes are installed?
- What product data, drawings, calculations, installation instructions, or approval documents are required?
- Who reviews substitutions and approves the final connection detail?
Three hypothetical interior-framing selection scenarios
The examples below illustrate the decision process only. They are not installation details, product recommendations, or evidence that a particular component has a seismic rating.
Scenario 1: A tall non-load-bearing partition needs independent lateral restraint
A full-height partition extends above a typical ceiling and requires independent lateral restraint. The team must define the restraint direction, design demand, attachment substrate, connection locations, and clearance from adjacent construction. A standard clip or track cannot be assumed adequate until its capacity and installation detail match the design.
Scenario 2: A head-of-wall condition must accommodate vertical movement
A partition meets a structure that can move vertically relative to the wall. Confirm the required displacement and what prevents lateral drift. Deflection track may be relevant, but it is not automatically a complete seismic restraint assembly. Coordinate track geometry, stud engagement, lateral restraint, board attachment, firestop, sealants, and clearances.
Scenario 3: A partition crosses a building or seismic joint
A partition or finish system passes near or across a deliberate separation between building elements. Determine whether the wall stops at the joint, bridges it with a movement-capable assembly, or uses separate framing on each side. The answer affects framing continuity, joint width, covers, fire and acoustic treatment, services, and finish transitions.
Installation coordination: what must be checked before the wall is closed
Field installation should follow the approved project detail, not a generic product image or verbal interpretation. Before concealment, verify the substrate, attachment locations, stud alignment, movement gaps, clearances, fasteners, and interfaces with adjacent construction.
- Confirm that the actual substrate matches the approved attachment condition.
- Check anchors and fasteners at the specified locations, with required edge distances and embedment.
- Verify that studs, track, clips, and restraints are oriented and connected as shown.
- Keep the intended movement zone free of rigid board, sealant, services, insulation, or ceiling components that would bridge it.
- Coordinate firestop, acoustic seals, finishes, and access panels with the movement detail.
- Inspect or photograph concealed connections before the wall is closed if required by the project plan.
Safety note: Seismic restraint work must follow the approved project detail because incorrect attachment can compromise the intended load path and expose workers or occupants to avoidable risk.
Pre-order and submittal checklist for seismic interior framing
Project and design information
- Project name, location, building level, and partition reference.
- Partition type, wall height, stud spacing, stud and track sizes, gauge or thickness, and board assembly.
- Movement directions and design displacement or performance requirement.
- Substrate type, attachment zones, edge conditions, and access limitations.
- Connection locations, clearances, movement gaps, and interfaces with ceilings or adjacent walls.
- Fire, acoustic, corrosion, finish, and exposure requirements.
- Drawings, details, specifications, addenda, approved alternates, and engineer instructions.
Supplier and procurement information
- Exact product or system proposed, including manufacturer and model where specified.
- Verified movement capability and direction.
- Material, dimensions, loads, fasteners, anchors, spacing, and installation limitations.
- Product data, technical drawings, installation instructions, and approval documents if required.
- Compatibility with the specified studs, track, clips, braces, board, and substrate.
- Quantities, lengths, packaging, lead time, phased delivery, and receiving constraints.
- Inspection points and responsibility for reviewing substitutions.
Do not mark an item suitable merely because its name contains “seismic,” “deflection,” “clip,” or “connector.” The submittal should show how it satisfies the project’s defined movement and attachment requirements.
Where a steel framing supplier fits into the process
A supplier can evaluate a proposed order more effectively when the wall type, movement requirement, substrate, connection detail, quantities, and documentation requirements are provided together. This information allows the procurement team to compare the proposed components with the approved design and identify missing details before ordering.
The supplier’s role is to provide the specified or proposed material and its available product documentation. The engineer of record and project design team remain responsible for determining the required connection, approving substitutions, and confirming that the selected assembly meets the project criteria.
Do not treat a supplier listing as confirmation that a product is a dedicated seismic connector or that any framing component has a seismic rating. Request product-specific documentation and compare it with the approved design.
Request the right detail before you order
Do not order by the phrase “seismic connector.” Send the project drawings, movement criteria, substrate, framing layout, clearances, fastener requirements, and submittal checklist for review first. That process distinguishes a restraint connection from a movement joint, deflection interface, cable assembly, or ordinary framing clip.
To review available framing components, visit Dass Metal Products’ steel framing products range and compare the listed options with the approved project detail.
