What should a trailer inspection checklist cover?

A trailer inspection checklist should cover coupling and connection (coupling type, coupling secure and locked, safety chains, correct rating, secure, crossed, breakaway system, electrical plug, air lines if fitted), tyres and wheels (condition, tread, pressures, wheel nuts, spare tyre), brakes (override/electric/air operation, adjustment, handbrake/park brake), body and structure (chassis/frame, floor/deck, gates/sides/tailgate, ramps, tarpaulin/cover), lights and electrics (tail lights, indicators, brake lights, clearance/marker lights, number plate light, reflectors), and load restraint (tie-down points, chains/straps, headboard). Any defects should be recorded and reported before towing.

How often should trailers be inspected?

Trailers should be inspected before every trip or tow - a pre-trip check each time the trailer is coupled to a towing vehicle. This covers coupling, lights, tyres, brakes and load restraint. In addition, trailers should receive a more detailed periodic inspection, typically monthly or quarterly that checks chassis integrity, brake adjustment, wheel bearing condition, ramp mechanisms and structural welds. Many organisations also conduct an annual roadworthy or engineering inspection. If a trailer is used in harsh conditions (off-road, heavy payloads, frequent loading/unloading), increase the inspection frequency accordingly.

What are the legal requirements for trailer inspections in Australia?

In Australia, trailers must be registered and roadworthy. Under the Heavy Vehicle National Law (HVNL), heavy trailers (over 4.5 t GVM) fall under Chain of Responsibility (COR) obligations, meaning all parties in the transport chain share responsibility for safety. For lighter trailers, state and territory road rules require that trailers are safely coupled, lights are working, tyres are in good condition and loads are properly restrained. While no single national law prescribes a specific inspection checklist, regulators expect operators to demonstrate that trailers are inspected before use and defects are recorded and actioned. A pre-trip inspection checklist is one of the most common ways to demonstrate compliance.

Is the template free to use without MapTrack?

Yes. Download and use the template for free. Open the HTML file in any browser and use Print then Save as PDF to generate a printable copy. No MapTrack account is required. If you later want digital trailer inspections linked to each trailer with automatic defect notifications, coupling verification workflows and fleet-wide compliance dashboards, MapTrack can help. Book a demo to see how it works.

What load restraint requirements apply to trailers in Australia?

All loads on trailers in Australia must be restrained in accordance with the National Transport Commission Load Restraint Guide. The load must be restrained so it cannot shift, fall, be dislodged or hang over the sides. Restraint methods include tie-down (using rated straps, chains or ropes to create friction and clamping force), containment (using gates, sides and headboards to physically block movement), and direct restraint (attaching directly to the load). The total lashing capacity must be at least 80% of the load weight for rearward restraint, 50% for forward and 50% for sideways. Under Chain of Responsibility legislation, all parties in the transport chain, including the loader, driver and consignor, share responsibility for proper load restraint.

Free trailer inspection checklist

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Free trailer inspection checklist (PDF-ready). Covers coupling, safety chains, lights, tyres, brakes, ramps and load restraint. Download free.

Jarrod Milford

Commercial Director

Updated 3 May 2026

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What is a trailer inspection checklist?

A trailer inspection checklist is a structured inspection form completed before a trailer is towed. It covers coupling and connection (coupling type, locking, safety chains, breakaway system, electrical and air line connections), tyres and wheels (condition, tread, pressures, wheel nuts, spare), brakes (override/electric/air operation, adjustment, park brake), body and structure (chassis/frame integrity, floor/deck, gates/sides/tailgate, ramps, tarpaulin), lights and electrics (tail lights, indicators, brake lights, clearance/marker lights, number plate light, reflectors), and load restraint (tie-down points, chains/straps, headboard). The completed form provides a documented record that the trailer was inspected and any defects reported before use.

Learn more about pre-start inspections in MapTrack.

Benefits of using this trailer inspection checklist

Road safety: catch coupling, brake, tyre and light issues before the trailer enters traffic, reducing the risk of accidents.
Legal compliance: demonstrate that trailers are inspected before use, supporting roadworthiness and Chain of Responsibility obligations.
Load restraint confidence: confirm that tie-down points, chains/straps and headboard are in good condition before loading.
Reduced downtime: early detection of tyre wear, brake issues, ramp faults and structural damage prevents costly roadside failures.
Fleet visibility: a consistent inspection process across all trailers gives fleet managers visibility of trailer condition and recurring defects.
Audit trail: a signed inspection form provides documented evidence for insurance claims, incident investigations and fleet audits.

Benefits of digitising forms in MapTrack

When you digitise trailer checklists in MapTrack, you get:

Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
Automatically get alerts when faults are identified.
Link every form digitally as a PDF to the relevant asset, location or person.
Receive a digital PDF copy with every submission to your email.
Ability to share forms digitally.
Build conditional logic (show or hide questions based on answers).
Take pictures or attach photos. Not possible with a paper-based form.
Electronic signatures.
Edit forms later without reprinting.
Restrict permissions (who can view, complete or approve).
Build forms with AI (describe what you need and MapTrack suggests the form).
Auto-schedule pre-start forms so operators are prompted before every shift.
Flag overdue pre-starts on the dashboard so nothing leaves the yard unchecked.
Link each pre-start to the asset record for a complete inspection history.

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What to include in a trailer inspection checklist

This trailer inspection checklist covers 11 key areas:

Trailer details: registration, type (box/flat/tipper/plant/tanker), make/model, fleet number.
Inspector details: name, date, towing vehicle rego.
Coupling and connection: coupling type (ball/pintle/fifth wheel), coupling secure and locked, safety chains (correct rating, secure, crossed), breakaway system, electrical plug, air lines (if air brakes).
Tyres and wheels: tyre condition and tread, tyre pressures, wheel nuts torqued, spare tyre (if fitted).
Brakes: brake operation (override/electric/air), brake adjustment, handbrake/park brake.
Body and structure: chassis/frame (cracks, corrosion, damage), floor/deck, gates/sides/tailgate, ramps (condition, hinges, locking pins, anti-slip), tarpaulin/cover.
Lights and electrics: tail lights, indicators, brake lights, clearance/marker lights, number plate light, reflectors.
Load restraint: tie-down points (rating, condition), chains/straps (available, rated), headboard (if fitted).
Overall result: Pass / Action Required / Fail.
Defects table: defect description, action taken, rectified by.
Inspector and supervisor sign-off: signature, name, date and time.

How to use this trailer inspection checklist

Fill in the trailer details (registration, type, make/model, fleet number) and inspector details (name, date, towing vehicle rego) at the top of the form.: Record the trailer registration, trailer type (box, flat top, tipper, plant, tanker or other), make and model, fleet number and the date. Enter your name and the registration of the towing vehicle. This information links the inspection to a specific trailer and tow combination for compliance records and fleet reporting.
Check the coupling and connections. Confirm the coupling is the correct type, is secure and locked, safety chains are crossed and rated, the breakaway system is functional, the electrical plug is connected and lights work, and air lines are connected if fitted.: Verify the coupling type (ball, pintle or fifth wheel) matches the towing vehicle. Confirm the coupling is fully engaged and the locking mechanism is secure. Check safety chains are crossed under the coupling, rated for the trailer GVM and free of excessive wear or corrosion. Test the breakaway system by pulling the lanyard to confirm the trailer brakes activate. Connect the electrical plug and walk to the rear to verify tail lights, indicators and brake lights illuminate correctly. For air-braked trailers, connect both air lines and check for audible leaks.
Inspect tyres - condition, tread depth, pressures and wheel nuts. Check the spare tyre if fitted.: Check each tyre for tread depth (minimum 1.5 mm across the full width), cuts, bulges, sidewall damage and signs of uneven wear. Measure tyre pressures with a gauge and compare to the placard or manufacturer specification. Confirm all wheel nuts are tight using a torque wrench or by checking torque indicator markers. Inspect the spare tyre condition and inflation, and confirm it is securely mounted.
Test brakes - confirm the override/electric/air brakes are operational, adjustment is correct and the park brake holds.: For electric brakes, apply the in-cab controller at various gain settings and confirm the trailer brakes engage progressively. For override (surge) brakes, check the actuator slides freely and the coupling is not seized. For air brakes, check for leaks at all connections and confirm air pressure holds when the engine is off. Engage the park brake and confirm the trailer holds stationary on level ground. Check brake adjustment by measuring free play at the adjuster or slack adjuster.
Walk around the body and structure. Check the chassis/frame for cracks or corrosion, inspect the floor/deck, gates/sides/tailgate, ramps (condition, hinges, locking pins, anti-slip) and tarpaulin/cover.: Examine the chassis rails and cross-members for cracks, corrosion, weld failures or impact damage. Check the floor or deck for rot, corrosion or damage that could allow cargo to fall through. Open and close all gates, sides and the tailgate to confirm latches engage securely. Inspect ramps for hinge condition, locking pin engagement and anti-slip surface wear. If fitted, check the tarpaulin or cover for tears, UV degradation and that the tensioning system works.
Check all lights - tail lights, indicators, brake lights, clearance/marker lights, number plate light and reflectors.: With the electrical plug connected, have a colleague or use a wall reflection to confirm both tail lights, both indicators (left and right), both brake lights and the number plate light are working. Check clearance and marker lights are functional and lenses are not cracked. Inspect all rear and side reflectors for damage or fading. Replace any blown globes or damaged lenses before towing.
Verify load restraint - tie-down points are rated and in good condition, chains/straps are available, and the headboard is secure.: Inspect each tie-down point for cracks, deformation or corrosion and confirm the rated capacity is visible on the lashing ring or placard. Check that sufficient chains and ratchet straps are available and that webbing straps are free of cuts, fraying or UV damage. If a headboard is fitted, confirm it is securely bolted and not cracked. Verify the total lashing capacity meets the requirements of the Load Restraint Guide for the planned load.
If any item fails, record it in the defects table with a description and action taken. Do not tow the trailer if defects affect safety until they are rectified.: Write a clear description of each defect, the immediate action taken (e.g. tyre replaced, globe changed, coupling greased) and who was notified. For safety-critical defects such as brake failure, coupling issues, missing safety chains or structural damage, the trailer must not be towed until repairs are completed and reinspected. Attach an out-of-service tag if the trailer is withdrawn from use.
Select the overall result (Pass / Action Required / Fail), sign and date the form. Save or print a copy for the fleet records.: Mark the overall result based on the inspection findings. Sign and date the form, and obtain a supervisor countersignature if required by your site or fleet policy. File the completed form in the trailer logbook, upload to your fleet management system or submit digitally through MapTrack so the record is linked to the trailer asset for compliance tracking and fleet audits.

In MapTrack, you can run digital pre-starts attached to each asset. Each submission is stored as a timestamped PDF against the asset record.

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How often should you complete this checklist?

Trailers should receive a pre-trip inspection every time they are coupled to a towing vehicle. This quick check covers coupling, lights, tyres, brakes and load restraint - ensuring the trailer is safe before it leaves the yard. In addition, trailers should receive a more detailed monthly or quarterly inspection that covers chassis integrity, brake adjustment, wheel bearing condition, ramp mechanisms and structural welds. Many organisations also require an annual roadworthy or engineering inspection. If a trailer is used in demanding conditions (off-road, heavy payloads, frequent loading/unloading with ramps), increase the inspection frequency accordingly.

Frequently asked questions

Applicable regulatory standards

This template aligns with the following regulations and standards:

WHS Act 2011 (Section 19 - Primary duty of care)
Heavy Vehicle National Law (HVNL) (Chapter 4 - Vehicle standards)
National Transport Commission Load Restraint Guide
AS 2693 (Vehicle trailers - Tow coupling and safety chains)

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