Concrete form shuttering

Claim 1

An adjustable form for forming a structure, the form comprising an inner form and an outer form, a space being defined between the inner form and the outer form for forming the structure therein, the inner and the outer forms each having a plurality of spaced-apart form plates, each form plate having form plate edges and a rear side, web members being provided between adjacent form plates of the inner form and between adjacent form plates of the outer form, a first circumferentially closed, force-transmitting support ring being arranged horizontally spaced from and inside the inner form, a second circumferentially closed, force-transmitting support ring being arranged horizontally spaced from and outside the outer form, threaded spindles being mounted in the support rings, the threaded spindles being slidable in approximately horizontal direction, means for fixing the threaded spindles, each threaded spindle having an end engaging a form carrier, wherein a form carrier is mounted to each form plate and each web member, the web members engaging over the form plate edges at the rear sides of the form plates, wherein each web member has on a surface facing the space between the inner and outer forms a support which corresponds in thickness approximately to the thickness of the form plates, the supports extending between the form plate edges of adjacent spaced-apart form plates.