Method of manufacturing a concrete prestressed in at least two directions, in which: / p & & p & - at least one wire of prestressing 10 is placed between the zig zag - dimensions 2 - 5 of a bed of coulee 1 extending in two directions a and b which cross one another to form a thread 11; / p & & p & - the threads are subjected to a prestressing; and / p & & p & - the concrete is introduced into the bed in order to form a matrix of concrete prestressed, characterizes in that the wire is passed from prestressing 10 through at least between two uprights opposite fixed 2 - 5 of the bed of coulee on the basis of a third dimension 4 of the bed of coulee in a direction parallel to the two dimensions above. This process and device for implementing it possible to put in place and on a wire prestressing of a simple.
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