Althon SFA Type 3 gratings are similar to Type 1 gratings except the grate finishes 150mm above the invert level of the incoming pipe allowing low flows to run uninterrupted without compromising safety.
The Sewers for Adoption/Scotland compliant outfall safety grille should be used on outfalls of 350mm diameter or greater. Manufactured from 70 x 70 x 10mm Steel Angle for the frame and 50 x 12mm Flat Bars at 100mm Spacing for the screen all fully galvanised to BS EN 1461 after manufacture.
The grating is hinged on one side and provided with a padlock facility on the other. The grating should be a minimum 270mm wider than the outside diameter of the pipe being used. The grating & frame can be supplied with chemical anchor fixings to fit existing outfalls or supplied fitted to our Headwall range.