E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
E04G21/14—Conveying or assembling building elements
E04G21/16—Tools or apparatus
B—PERFORMING OPERATIONS; TRANSPORTING
B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
Système d'ancrage permettant d'extraire et déplacer des éléments encastrés dans le sol tels que plaques d'égouts, grilles ou toutes autres pièces existant actuellement sur le marché.