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SP21 J Headwall
SP21J precast headwalls are produced with a horizontal wing walls at the front of the apron. SP21J precast headwalls are for inlets or outlets situated in locations with high or steep embankments or where the structure is required to provide protection to an accessory such as a flap valve, duck bill valve, stop logs or weir wall. SP21J precast headwall has been designed to suit plastic or clay pipework up to 1200mm and concrete pipework up to 1350mm ID. It has a backwall height of 2050mm and a flat spillway. Althon SP21J precast concrete headwalls are cast in two pieces and to suit the diameter and type of pipe being used and can be provided with fixings cast in at the time of manufacture to accommodate gratings, trash screens, flap valves, ladders, guardrails and flow and depth monitoring equipment.
SP21 precast headwall units can be factory fitted with a range of accessories such as flap valves, penstocks, Kee Klamp® handrails and a selection of gratings depending on the application.
As standard our headwalls have a natural concrete finish.
We can offer coloured headwalls in 4 colours but the final shade is affected by many influences.
We can offer coloured headwalls in 4 colours but the final shade is affected by many influences.
Natural
Cotswold
Agate
Raven Grey
Everglade
Product Name
Max Pipe Opening PCC
Max Pipe Opening Plastic / C'ware
Backwall Height
Approx Headwall Weight (kg)
Wingwall Profile
SP21 J Headwall
1350
1200
2050
8269
Horizontal