All frames have been designed to positively key into the surrounding concrete slab (or mortar infill)
    and feature Mascot's "key lock" system of cast-in frame ties for maximum resistance to deflection.

  Load ratings in accordance with the AS3996 where applicable.
  Many sump and kerb entry grates have been created to withstand specific loads imposed bother
      than legally roads registered vehicles.  That is road construction machinery or commercial
      passenger aircraft, etc.
  Please consult with your nearest Mascot Sales Office for more details.

NON-STANDARD FEATURES

  All framed gratings can be fitted with holding down bolts for the prevention of grate removal or
     pit access.

  Mascot's hold-down bolts (unless otherwise requested) are high tensile steel Allen bolts.

  If Required, some grates and frames can be supplied in a variety of cast metals including brass or
     aluminum.   As  tensile and compressive strengths vary between alloys, consult your local
     Mascot Sales Office to provide load rating estimates and costs.

The provision of grates and frames cast into a concrete surround is also available on request.  This
     includes all load ratings in both standard and "V-Drain" configuration.
In certain cases, hinge pins can be fitted to allow easier access if regular pit entry is required.

  If fitting the grate after the pit has been constructed, form a rebate to the entire perimeter of the pit wall. 
       Correct rebate sizes can be seen in the table below.