SP20J precast headwalls are produced with a horizontal wing walls at the front of the apron. SP20J 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. SP20J precast headwalls have been designed to suit plastic and clay pipework up to 1200mm and concrete pipework up to 1350mm. The backwall height is 2000mm. SP20 J precast headwalls are manufactured in 2 sections. Althon SP20J precast concrete headwalls are cast 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.

SP20 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. The SP20J headwall weighs 7700kg / 3850kg per half.

SP20 J Headwall line drawing
Product Name
Max Pipe Opening PCC
Max Pipe Opening Plastic / C'ware
Backwall Height
Approx Headwall Weight (kg)
SP20 J Headwall
1200
1350
2000
7700

Filters for SP20 J Headwall Downloads

    All Available Downloads for SP20 J Headwall - Page 1 of 66

    Title
    PDF
    CAD
    Add to Zip File

    SP20 J Headwall + Sfa1 375 Outfall Safety Grille

    SP20 J Headwall + Sfa1 450 Outfall Safety Grille

    SP20 J Headwall + Sfa1 600 Outfall Safety Grille

    SP20 J Headwall + Sfa1 750 Outfall Safety Grille

    SP20 J Headwall + Sfa1 900 Outfall Safety Grille

    SP20 J Headwall + Sfa1 1050 Outfall Safety Grille

    SP20 J Headwall + Cranked Grating

    SP20 J Headwall + Sloped Grating

    SP20 J Headwall + 3 Sided Kee Klamp

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 600 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 750 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 900 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Sfa1 1050 Outfall Safety Grille

    SP20 J Headwall + 3 Sided Kee Klamp + Cranked Grating

    SP20 J Headwall + 3 Sided Kee Klamp, Gate And Ladder

    SP20 J Headwall + 3 Sided Kee Klamp, Gate And Ladder

    SP20 J Headwall + 3 Sided Kee Klamp, Gate And Steps

    SP20 J Headwall + Backwall Kee Klamp

    SP20 J Headwall + Backwall Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP20 J Headwall + Backwall Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP20 J Headwall + Backwall Kee Klamp + Sfa1 600 Outfall Safety Grille

    SP20 J Headwall + Backwall Kee Klamp + Sfa1 750 Outfall Safety Grille

    Datasheet and Installation Instructions for SP20 J Headwall

    Free headwall design service

    If you cannot find what you are looking for our Free Headwall Design Service can help.

    More information