Structural and base materials · Timber & Wood
Timber Connector Hardware
Treats the connector as a purchased component rather than as an accessory to the timber it serves, and explains why the fastener, the coating and the fit are all part of the component.
Educational reference entry. Suitability depends on the complete assembly, substrate, exposure, installation method, manufacturer documentation, local requirements and qualified professional review.
Overview
What timber connectors is
Timber connector hardware is the family of manufactured metal components used to join one piece of timber to another, or timber to masonry, concrete or steel. It covers joist hangers of many patterns, framing anchors and angle brackets, restraint and lateral straps, hold-downs and tension ties, truss clips, and the punched metal plates pressed into the joints of fabricated trusses. They are ordered by reference under their own names, and they are not spare parts belonging to the timber they connect.
The fastener is part of the component. Hangers and anchors are made with a defined pattern of holes and are designed around a particular nail or screw filling every one of them. Leaving holes empty, using a shorter or thinner fastener because that is what is on site, or substituting a general-purpose screw for the connector nail the manufacturer names, produces a different connection from the one that was chosen. This is the single most common way a correctly specified connector ends up not being the connection that was specified.
Fit is the second half of it. A hanger is made for a particular depth and width of member and is intended to be hard against the supporting timber with the carried member seated fully into it. Packing out a loose hanger, cutting the timber short so it does not reach the back of the hanger, bending or mitring a connector to make it fit a situation it was not made for, or nailing through the wrong holes all change the component into something the manufacturer never described. The same applies to straps, which are made in lengths for a reason and which have to engage enough of the structure at each end.
The metal matters because connectors live where timber, damp and sometimes masonry meet. Galvanised, stainless and coated products exist for that reason, and the pairing between a connector and the timber it sits against is something the manufacturer addresses — particularly where the timber has been treated, where the connection is external, or where it is built into masonry. Which connector goes where, how many fasteners it takes and what it is being asked to carry are outputs of a structural design, and the design and the manufacturer's information are inseparable.
Terminology
Common names and aliases
These names describe the same thing. The library keeps one entry per material so that an acronym, a trade name or a regional spelling never becomes a second, thinner page.
- Joist hangers
- Framing anchors
- Restraint straps
- Punched metal connector plates
- Timber-to-timber connectors
Applications
Common applications
Where this material is typically encountered. A typical application is not a statement that it suits your project.
- Hanging floor joists from trimmers, beams, wall plates and steel members.
- Connecting rafters, ceiling members and wall plates in a roof carcass.
- Strapping timber floors and roofs back to masonry walls for lateral restraint.
- Joining the members of fabricated trusses with pressed plates at each joint.
- Anchoring timber frames and posts down to concrete, masonry or steel below.
Consideration
Where it is commonly considered
- Wherever timber members meet and the connection is carrying something rather than merely holding position.
- Where a floor or roof is being built and the designer has scheduled the connections.
- Where engineered timber members are used, whose accessories are specified with them rather than after them.
- Where an existing floor or roof is being altered and new members meet old structure.
- Where timber is being connected to masonry, concrete or steel and a purpose-made component is needed.
Professional review
Where additional professional review is especially important
These are the situations where the answer depends on the specific building, and where a qualified professional should be involved before anything is decided.
- Choosing or substituting a connector on site, since what it carries is a structural matter.
- Using fasteners other than the ones the manufacturer names for the connector, including leaving holes unfilled.
- Bending, cutting, mitring or otherwise altering a connector to make it suit a situation it was not made for.
- Reusing connectors recovered from other work, or using components of unknown material in damp positions.
- Fixing into engineered timber members, treated timber or masonry without checking the relevant guidance.
Properties
Key properties to discuss
Qualitative topics worth raising. Measured values, classes and grades come from the manufacturer's technical documentation for the specific product, not from a reference page.
- Installation dependency
- Every hole is meant to be filled with the fastener the manufacturer names. A part-nailed hanger, or one fixed with whatever screws were in the van, is not the connection the design assumed.
- Substrate dependency
- What the connector is fixing into governs the component: solid timber, an engineered joist, masonry, concrete and steel each call for different products and different fixings.
- Weathering and exposure
- Galvanised, stainless and coated products exist because connectors sit where timber and damp meet. External positions and connectors built into masonry are where the material choice earns its keep.
- Moisture behaviour
- A connector holding timber tight against a damp surface can keep that timber wet, which is a detailing matter as much as a hardware one.
- Repairability
- Connectors are usually buried behind finishes once the building is complete, so what can be corrected is whatever is caught before the linings go on.
- Maintenance
- There is nothing to maintain in a concealed connector. What shows instead is movement, deflection or a squeaking floor, and interpreting that is a job for someone qualified.
- Surface wear
- Coatings are damaged by cutting, hammering and by being dragged around a site, and a scarred coating on a component going into a damp position is worth noticing.
- Documentation
- The connector schedule, the manufacturer's information and a record of what went where are what anyone altering the floor or roof later will need.
Exposure
Exposure and environmental conditions
- Is this connection internal and dry, or external, damp or built into masonry?
- Is the timber treated, and has the manufacturer been consulted about metal in contact with it?
- Is the building coastal or in an aggressive atmosphere where the material choice changes?
- Could the connector be holding timber tight against a wet surface?
- Is there any chance of condensation forming at this connection in use?
Assembly
Substrate and system dependencies
What this material sits on, is fixed to or depends on. This is usually where performance is won or lost.
- The member sizes and the supporting structure determine which component can be used at all.
- Engineered joists and trusses come with their own requirements for connectors and for where fixings may go.
- Fixing into masonry or concrete brings a second set of components and a second set of requirements.
- Where connectors are built into masonry as the wall rises, the masonry and carpentry sequences have to align.
- Notching, drilling or trimming timber near a connection changes the connection whether or not anyone intends it to.
Appearance
Appearance and finish considerations
- Most connectors are concealed by finishes and contribute nothing to how a room looks.
- In exposed timber structures the connector is visible, and its finish and geometry become part of the design.
- Straps built into masonry may show at the wall face and need making good deliberately rather than incidentally.
- Where connectors are exposed externally, staining running from a connector down the timber is a familiar sight.
- A visibly bent, packed or improvised connector reads as a defect even to people who cannot say why.
Durability
Durability questions
Questions to raise rather than a service life to expect. No material has a universal lifespan — it depends on the assembly, the exposure and the upkeep.
- Is the connector on site the one that was specified?
- Are all the fastener holes filled with the fasteners the manufacturer names?
- Is the material of the connector right for the dampness of this position?
- Are members seated fully into hangers, hard against the supporting timber?
- Has any connector been cut, bent or packed to make it fit?
Upkeep
Maintenance and repair considerations
- If a floor moves or squeaks later, how would anyone establish what connectors are in it?
- Is there a schedule or record of which connectors went where?
- What would be involved in inspecting connections behind finished ceilings?
- If an opening is formed in a floor later, who decides what happens to the connections around it?
- Are any connectors accessible for inspection, and which ones are permanently concealed?
Installation
Installation dependencies
What the installation depends on — not how to do it. Method belongs to the manufacturer's instructions and the trades carrying out the work.
- Fasteners are the ones named by the manufacturer, in every hole, and they are part of the specification.
- Members are cut so that they seat fully into hangers rather than being packed or left short.
- Straps and components built into masonry go in as the wall rises, in sequence with the carpentry.
- Fixings into engineered members follow the joist or truss manufacturer's rules about where fixings may go.
- Connections are checked before linings and ceilings close them in, because after that nothing can be seen.
Documentation
Documentation to request
Ask for these in writing, for the specific product being proposed, and keep them with the project record.
- The structural engineer's connection schedule or drawings for the floor, roof or frame.
- The manufacturer's information for each connector type, including the fasteners it requires.
- The joist or truss manufacturer's guidance where engineered members are involved.
- A record of what was installed where, kept with the building information.
- Any instruction covering treated timber, external positions or metal in contact.
Conversations
Questions for qualified professionals
Bring these to the relevant qualified professional, manufacturer or authority. Requirements vary by project and location.
- Who has specified these connections, and what are they carrying?
- Which connector is being used at each position, and is that what is on site?
- What fasteners does the manufacturer require, and are those being used in every hole?
- What material and coating has been specified for connectors in damp or external positions?
- Are these engineered joists or trusses, and what do their makers say about connectors and fixings?
- Has any connector been altered on site to make it fit?
- Who is checking the connections before the ceilings go on?
- What record of the connections will exist for whoever alters this floor later?
Blind spots
Commonly overlooked points
- The fastener is part of the connector, and a part-nailed hanger is a different connection from the one specified.
- Substituting a general screw for the connector nail named by the manufacturer changes the component.
- A member that does not seat fully into its hanger is bearing differently from the way the design assumed.
- Bending or cutting a connector to fit turns a specified component into an improvised one.
- Connectors are concealed for the life of the building, so the only chance to check them is before the linings go on.
- Engineered joists and trusses have their own rules about where anything may be fixed, and those rules come from their makers.
What this page does not do
- Connector selection, quantity, fastener specification and what any connection carries are engineering decisions for qualified professionals and cannot be taken from a reference page.
- Nothing here indicates that any connection is structurally adequate or correctly installed.
- Concerns about an existing floor, roof or frame call for assessment by someone qualified to carry it out.
- Requirements vary by location and building type and must be verified against local requirements before work is planned.
Component forms
Building components commonly formed from this material
Elements this material is commonly used to make, named by the position they occupy in an assembly rather than by what they are bought as. This states common practice only — it is not a statement that this material suits any of these components in a particular building.
Related entries
Often used alongside
Entries commonly encountered together with this one. Co-occurrence only — never a claim that any combination is compatible or suitable.
Inspiration
Related Ideas Library pages
Design directions where this material commonly appears.
Preparation
Related planning checklists
Owner-side preparation before the conversation where this material comes up.
Go deeper
Related Build Design Hub guides
Planning guidance and neutral comparisons behind the decisions on this page.
Timber & Wood-Based Materials
Reference entries for solid timber and wood-based panels and engineered products — from structural softwood and plywood to cross-laminated timber, OSB, MDF and veneers.
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