Premium Australian-made Stronglite composite P5 lid, Class B to AS 3996-2019
The Stronglite P5 composite lid is a premium Class B cover for P5 plastic pits. It carries a Class B load rating to AS 3996-2019, yet it weighs just 9 kg. As a result, it is under a third of the weight of a concrete P5 lid and lighter than many composite lids on the market.
A pit is a small underground chamber that houses cables, conduit or other infrastructure. A lid sits flush at ground level to cover it. P5 is a standard pit and lid size, so you’ll find it across telecommunications, electrical, rail, road and water projects in Australia.
Every Stronglite lid is designed and made in Australia from fibreglass-reinforced polyurethane. Because production is local, we can turn around custom lids quickly. For example, you can choose your own colours, markings, engraved text or logos, and lockable or non-lockable options.
This lid covers underground P5 plastic pits where light vehicles may cross, such as driveways, footpaths open to vehicles, verges and livestock areas.
SA Power Networks has approved the Class B lid. We also supply the Stronglite range to Metro Trains. In addition, selected VicRoads and Department of Transport and Planning (DTP) project drawings specify Stronglite lids.
Working on a VicTrack project? VicTrack requires Class C, so choose the Stronglite P5 Class C instead. VicTrack has approved the Class C lid, and the VicTrack Comms marking is only available in Class C.
For standard orders, choose from 11 markings: Plain, ARTC, Comms, Electrical, Rail Sign Comms, V/Line, VERNet, VicRoads Comms, VicRoads Electrical, Vocus and Water. Grey is standard on every marking. In addition, bitumen black is standard on Comms and Electrical, so those lids blend in with asphalt and bitumen surfaces.
The marking only shows which network or authority owns the lid on site. However, it doesn’t change the material, dimensions or load rating, because those stay the same across every option. Check your project specification for the correct marking and colour before ordering.
Need something outside the standard range? Australian production means a shorter supply chain and quick turnaround. Because of this, your lids can match your project’s requirements instead of whatever happens to be on the shelf.
For example, we can supply Stronglite lids with:
Minimum order quantities apply to custom lids, so contact us early to discuss your project.
Concrete lids cost less up front. However, they can crack and chip over time, and eventually they need replacing. As a result, every replacement means buying, handling and installing another heavy lid. Stronglite costs more initially, but it stays in service longer and is far easier on the people who lift it.
Overall, Stronglite is the premium choice where light vehicles may cross, lids come off often, you need a custom finish, or the pit needs locking.
The lid fits P5 plastic (polymer) pits and measures 650 x 400 x 50 mm (±2 mm). Because it weighs just 9 kg, it is far easier to lift, carry and place than a concrete lid.
Dimple screws (6 mm self-tapping) sit in the sides of the lid. You can adjust them to take up minor variation in pit openings, so the lid fits firmly and is less likely to shift during flooding. Two lifting holes then let you remove the lid for access.
Need to secure the pit? Then choose the Stronglite P5 Class B – Lockable (Barri Bolt), which has Barri Bolt holes in two diagonally opposite corners. Barri Bolt is the only locking option we offer.
| Length | Width | Depth | Weight | Class |
|---|---|---|---|---|
| 650mm | 400mm | 50mm | 9kg | B |
Tolerance ±2mm on length, width and depth. Dimensions and weight are the same across all markings and colours. If critical, please contact us to verify before use.
| Class | Typical Use | Nominal Wheel Loading | Serviceability Design Load | Ultimate Limit State Design |
|---|---|---|---|---|
| B | Cars and light vehicles at slow speed — e.g. driveways, footpaths open to vehicles, livestock areas. Not for trucks. | 2,670kg | 53kN | 80kN |
Manufactured and tested to a Class B load rating under AS 3996-2019. Rim marking: “CLASS B AS 3996-2019”.
| Property | Standard | Result |
|---|---|---|
| Load class | AS 3996-2019 | Class B |
| Impact resistance | AS 3996-2019 | Meets requirements |
| Slip resistance (wet pendulum) | AS 4586 | Class P5 — highest class |
The P5 slip resistance class is unrelated to the P5 pit size.
This lid is Class B — for cars and light vehicles at slow speed. If slow-moving commercial vehicles will cross the pit, see the Stronglite P5 Class C (manufactured to a Class C load rating; not certified to AS 3996-2019). AS 3996 directs that where there’s any doubt about which class a site needs, the stronger class should be chosen. See our Load Class Guide for the full class range, from Class A through to Class G, or contact us before ordering if you’re unsure.
Yes, at slow speed. Class B under AS 3996-2019 covers cars and light vehicles at slow speed, such as driveways and footpaths open to vehicles. It is not for trucks. If commercial vehicles will cross the pit, a higher class is needed.
Yes. The Stronglite range is designed and manufactured in Australia. Local production means quick turnaround, particularly on custom lids.
Concrete lids cost less up front, but they can crack and chip over time and need replacing, and at around 31 kg they are heavy to lift. Stronglite costs more initially, but it meets the impact resistance requirements of AS 3996-2019, resists chipping and cracking, and lasts longer in service. At 9 kg, it also reduces manual handling strain every time the pit is opened.
The Stronglite top surface achieves slip resistance class P5 under AS 4586, using the wet pendulum test. P5 is the highest class on that scale. The P5 slip class is unrelated to the P5 pit size.
Yes. We can make Stronglite lids with custom colours, custom markings, engraved text or logos, and lockable or non-lockable configurations. Because they are made in Australia, custom lids are turned around quickly. Minimum order quantities apply. Contact us to discuss your project.
9 kg. That is under a third of the weight of our 31 kg Class A concrete P5 lid, and lighter than many other composite P5 lids on the market, which can weigh up to around 20 kg.
It is designed to fit P5 plastic (polymer) pits. The lid measures 650 x 400 x 50 mm (±2 mm).
Only the marking on top of the lid. The material, size, weight and load rating are the same on every version. Choose the marking that matches your project’s network or authority, or Plain if no marking is needed. Custom markings can also be made to order.
Grey is standard on every marking. Bitumen black is standard on Comms and Electrical. Other colours can be made to order.
Class B is manufactured and tested to AS 3996-2019 and weighs 9 kg. Class C is manufactured to a Class C load rating for slow-moving commercial vehicles and weighs 10 kg. Class C is not certified to AS 3996-2019.
Selecting the correct class is the designer’s responsibility, and AS 3996 directs that the stronger class be chosen where there’s any doubt. See our Load Class Guide or contact us before ordering if you’re unsure.
Not this version. The Stronglite P5 Class B Lockable has Barri Bolt holes for locking to the pit. Barri Bolt is the only locking option we offer.
Yes. SA Power Networks has approved the Class B lid. We also supply the Stronglite range to Metro Trains, and selected VicRoads and Department of Transport and Planning (DTP) projects have specified Stronglite lids.
No. VicTrack requires Class C, so choose the Stronglite P5 Class B Lockable instead. VicTrack has approved the Class C lid, and the VicTrack Comms marking is only available in Class C.
