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Outdoor Carpark Drainage Solutions from ACO

Outdoor carpark drainage

Outdoor car parks: common hazards from a user's perspective

When designing an outdoor car park, it pays to always be aware of the hazards that can adversely affect both people and vehicles. While it is the car park owner’s responsibility to ensure that the park is well-maintained, designers of these spaces should be aware of the potential risks found in outdoor car parks. To assist designers detail safe, flat pavements to mitigate these risks, ACO has compiled a list of design challenges and solutions.

1. Water ponding causing inconvenience
Water ponding occurs when an uneven surface allows water to collect in one or multiple locations instead of being adequately drained away. In light rain, this is not too much of a hazard but stormwater can very quickly accumulate with sustained or heavy rain, fast becoming a dangerous nuisance for carpark users to navigate.

The principle cause of an undulating surface is a poorly integrated drainage system in the outdoor car park. These often come in the form of a grated pit and pipe system which are reliant on pavement gradients. Carparks that are designed in this way are typically covered by numerous grated pits spread out over its trafficable surface. Each pit is surrounded on all sides by gradients to naturally allow water, in the vicinity of the grate, to runoff into it. If these pits or grates become blocked or the surface gradients change due to the pavement settling, then water ponding can occur. This can make large areas of the car park inaccessible or can block in motorists who have already parked their vehicles.

2. Runaway trolleys causing damage
A frequently experienced hazard in any car park is the danger posed by runaway shopping trolleys. Wayward trolleys are often caused by undulating surface gradients and ramps, which can lead the trolley to gain speed before coming to a stop when the surface evens out or it hits a vehicle or pedestrian. Additionally drainage systems reliant on gradients can instigate trolleys moving of their own accord.

While shopping trolleys are designed to be easily manoeuvrable, the hazard presented by them cannot be underestimated. Damage caused to vehicles by trolleys is up to $1 million per year with the average cost per vehicle being $800. When laden with groceries and out of control, trolleys can reach speeds of up to 10km/h, fast enough to collide with car park users with little time to react.



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1300 765 226

Emu Plains, NSW, 2750

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Aco Profile

1300 765 226

ENQUIRE HERE

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