Headwalls in attenuation ponds

Balancing ponds or attenuation ponds are a vital flood prevention method. You will often see these attenuation ponds complete with headwalls, on new construction projects such as housing estates, new roadways etc. The purpose of them is during heavy or prolonged wet weather the drainage system on new construction projects can be overwhelmed due to the sheer amount of excess water being discharged. The attenuation pond is designed to control the amount of excess water entering the drainage system to reduce the likelihood of flooding.

The headwalls in the photos we have factory fitted one with a close coupled grating and the other with a penstock which can control and isolate water, cranked grating over the valve and 3 sided kee klamp for fall protection.

For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk

Extra Large SFA Headwall 

A recently cast SFA headwall with extension pieces added to make it wider. This headwall is made to suit 2 x 1800mm concrete pipes and is currently being factory fitted with an SFA hinged and lockable outfall grating. It also has a separate toe beam and Kee Klamp handrail will be factory fitted before it arrives on site.

For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk 

Cladding precast concrete headwalls

We have recently supplied several splayed and rectangular precast concrete headwalls with dovetail slots, flap valves and gratings for a project in Horsham. When a client wishes to clad our precast concrete headwalls and they also require factory fitted accessories we simply still predrill the headwalls with the fixing points and then supply site with longer fixings making installation much safer and faster. 

All the headwalls have now been installed and cladded by site and we think the finished result looks great.

For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk 

Level Invert on Headwalls

The photo above is one of our smaller RSFA headwalls (RSFA18B 01 1150) showing a great example of when a customer requires the pipe ID at level invert. We cast in a slightly larger opening than the OD of the pipe to make installation easier on site, once the pipe is in the correct position site will fill the void around the pipe with high strength non shrink grout. The SFA1 Outfall Safety Grille is fitted to the headwall 150mm up from the spillway as standard when the pipe ID is level with the spillway.

For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk 

Bespoke Angled Rectangular Headwall

Here at Althon we have 100’s of different precast concrete headwall options to suit a wide range of pipe sizes and materials. However sometimes you still cannot find the one you need to suit your site requirements, so we are always happy to look at designing a bespoke option for you.

Our latest bespoke headwall being cast in the factory is an angled rectangular headwall factory fitted with pedestrian guardrail, slides for aluminium stop logs and a fixed grating for a box culvert opening. This design suits the clients site requirements and having the accessories factory fitted to a precast concrete structure saves time on site and has great health and safety benefits.

For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk