Car park drainage for public spaces, multi-storeys & undergrounds
Car parks, multi-storeys and underground parking facilities are an essential component of transport infrastructure. These type of surface areas are heavily trafficked everyday by a wide variety of vehicles within residential, retail, public and commercial sectors.
The specified car park drainage systems must account for the frequency of traffic, as well as pedestrian safety. Multi-storeys and underground parking facilities also need to take into consideration the protection of the building’s fabrication.
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There is a range of requirements for channel drainage within parking areas. Heavy or frequent traffic imposing high loads, dynamic forces, corrosive substances and installation depth restrictions are just some of the factors that need to be considered.
Car park drainage needs to consider the following factors:
Load and forces
Vehicles exert significant loads, dynamic forces and stress on surfaces when braking, turning, reversing and accelerating. The car park drainage channel must be strong and robust to withstand a variety of loads and forces, including vertical and lateral ones over a long period of time.
A safe environment for pedestrians requires secure systems with anti-slip surfaces and heelsafe gratings. Incorporating these features within the overall project will provide safety and design flexibility.
Drainage systems must be resistant to frost, de-icing salts and UV-light to ensure longevity and low-maintenance costs.
Parking areas can cover extensive surfaces. For large catchment areas it’s often more cost-effective to choose a car park drainage solution with a higher drainage and retention capacity. A precise and accurate hydraulic calculation will help determine the correct channel size and drainage system for the project under design.
Tyre wear, brake dust, fuel hydrocarbons, as well as other contaminants like petrol, oil, zinc and copper can be found on parking surfaces. These pollutants can enter local sewer systems or natural watercourses. However, by using a sustainable drainage system it can collect and treat surface water at source before being released.
Theft and vandalism
Having a parking drainage system with multiple bolt connections or anti-vandal locking handles can protect the gratings from vandalism and theft.
Need effective car park drainage for your project?
The presence of surface water in underground parking areas can come from a numerous sources. Rainwater or snow carried in from vehicles, testing fire sprinklers, inadequate damp-proofing or poor ramp drainage.
It can also depend upon the following factors:
The number of vehicle movements per day
The size of the vehicles and the underground parking space
The time of year and the length of the routes (e.g. across several levels)
Hydraulic performance – without an accurate hydraulic calculation and a reliable drainage system, it could increase the risk of damage to the building’s structure.
Additional challenges for underground parking:
Loads and forces:
Turning tightly around columns, ramps and small parking spaces imposes significant loads, stress and forces on the system and adjacent surface. Linear drainage across ramps is subject to high impact loads when trafficked.
Parking surfaces and channel gratings are subject to continual attack by corrosive substances including oil, petrol, brake fluid, cleaning detergents and de-icing salts. Therefore, the drainage solution must be durable and corrosion resistant.
Installation depth restrictions:
Floor structures within underground car park, often have limited depth available for installation of surface drainage above damp proof membranes. If there are depth restrictions, linear drainage systems will need to have shallow inverts.
High surface water run-off:
Due to the steep incline of underground ramps, surface water flows more quickly. System gratings should be selected for efficient interception to avoid surface water crossing over drainage channels.
Multi-storey car park drainage
When considering surface drainage for multi-storeys, a distinction must be made between the exterior and interior. Some of the challenges for multi-storey car park drainage are consequently similar to underground parking. For example; snow accumulation by exit and entrance ramps and the protection of the building fabrication. However, the exterior of a multi-storey car park covers a larger surface area that predominantly will be more exposed to climate change.
Installed as a single, durable monolithic unit with an integral grating, RECYFIX MONOTEC is a stable, safe and secure drainage system. The channel units are lightweight and have a large hydraulic capacity when compared to equivalent sized channels.
Environmentally friendly – channel unit made from 100% recycled polypropylene
Installation time and cost savings achieved through value-engineering on large external sites
Strong, rigid top-edge design; resilient to dynamic forces caused by turning wheels
High resistance to frost, de-icing salt and UV light
DRAINFIX CLEAN filtration and drainage system is an ideal solution to treat polluted surface run-off from car park surfaces. Fine particles are captured and retained within a carbonate-rich filter substrate, allowing cleaned water to be released back into natural water courses or sewer systems.
Withstands traffic areas up to F 900 loading class
High water retention capacity for effective cleaning performance, even during heavy rainfall events
Efficient treatment at shallow inverts with smaller installation footprint
Strong and durable with high material resistance to frost, salts, chemicals, extreme temperatures and UV light
Extremely low maintenance requirement
FASERFIX KS: fibre-reinforced concrete channel
FASERFIX KS channel is particularly suitable for draining multi-storeys and underground parking facilities. It is very robust and durable due the channel base made from fibre-reinforced concrete and the extra thick side walls.
Shallow channel options for areas with depth restrictions
Gratings held securely in place with a ten-point locking system over one metre for added safety and security (SIDE-LOCK mechanism plus central locking bolt / bar arrangement)
Class 1A (non-flammable) fire rating (DIN 4102)
Material resistant to frost, salts, chemicals, extreme temperatures and UV light
Additional HAURATON drainage systems and gratings are available for car park applications. Get in touch to discuss your project requirements.