Translation of "châssis de grille mécanique " (French → English) :

In the case of the use of hexavalent chromium in corrosion preventive coatings related to bolt and nut assemblies for chassis applications, described in point (13)(b) of the Annex, the Commission will assess, by 1 July 2007, whether the expiry date of that exemption has to be reviewed in order to ensure that no accidental disconnection of essential mechanical parts can occur in the lifetime of the vehicle.

1. Except where their context or note 4 to this chapter otherwise requires, the headings of this chapter cover only products which are in the crude state or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), crushed, ground, powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or physical processes (except crystallization), but not products which have been roasted, calcined, obtained by mixing or subjected to processing beyond that mentioned in each heading.

1. Except where their context or Note 4 to this Chapter otherwise requires, the headings of this Chapter cover only products which are in the crude state or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), crushed, ground, powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or physical processes (except crystallisation), but not products which have been roasted, calcined, obtained by mixing or subjected to processing beyond that mentioned in each heading.

You want that material in the forest soil, and not in a boiler system. It causes slagging, fouling and technical issues of corrosion inside combustion systems, and creates mechanical operational issues of forming essentially glass in your boiler grates, large clinkers or moon rocks.