Levelling spacer device

A levelling spacer device for the laying of slab-shaped products for coating surfaces, comprising:

• at least one base having a lower surface and an opposite upper surface defining a support plane for two slab-shaped products placed side by side;
• a spacer bridge perimetrically delimiting a through opening adapted to be crossed by a pressure wedge along a crossing direction, wherein the bridge is provided with:
• at least two legs placed side by side between each other along a flanking direction orthogonal to the crossing direction and each one projecting from a respective portion of the upper surface of the base, in a direction orthogonal thereto, wherein each leg of the bridge is frangibly connected to the respective base portion;
• and
• a crosspiece, which joins the top of the two legs along the flanking direction;
• wherein each leg has:
• an inner sidewall provided with a top end which joins at the cross-piece and a base end which joins at the upper surface of the base, wherein the inner sidewall delimits later-ally the through opening;
• and
• an opposite outer sidewall, wherein the outer sidewall is provided with a top end which joins at the crosspiece and a base end which joins at the base, wherein the top end of the outer sidewall is placed at a first distance along the flanking direction from the top end of the inner sidewall and the base end of the outer sidewall is placed at a second distance along the flanking direction from the base end of the inner sidewall,
• wherein the outer sidewall of each leg converges towards the inner sidewall and/or the inner sidewall of each leg converges towards the outer sidewall, so that a ratio between the second distance and the first distance is lower than 1;
• wherein each leg of the bridge is frangibly connected to the respective base portion by a respective predefined weakening zone, wherein the weakening zone comprises a fracture line, wherein the fracture line comprises a longitudinal cut extending for a predetermined section of the width of the respective leg with a longitudinal axis parallel to the flanking direction, wherein the longitudinal cut is placed at a predetermined cutting distance from the lower surface of the base;
• and wherein the cutting distance is lower than a maximum distance between the upper surface and the lower surface of the base.

A levelling spacer device for the laying of slab-shaped products for coating surfaces, comprising:

• at least one base having a lower surface and an opposite upper surface defining a support plane for two slab-shaped products placed side by side;
• a spacer bridge perimetrically delimiting a through opening adapted to be crossed by a pressure wedge along a crossing direction, wherein the bridge is provided with:
• at least two legs placed side by side between each other along a flanking direction orthogonal to the crossing direction and each one projecting from a respective portion of the upper surface of the base, in a direction orthogonal thereto, wherein each leg of the bridge is frangibly connected to the respective base portion;
• and
• a crosspiece, which joins the top of the two legs along the flanking direction;
• wherein each leg has:
• an inner sidewall provided with a top end which joins at the cross-piece and a base end which joins at the upper surface of the base, wherein the inner sidewall delimits later-ally the through opening;
• and
• an opposite outer sidewall, wherein the outer sidewall is provided with a top end which joins at the crosspiece and a base end which joins at the base, wherein the top end of the outer sidewall is placed at a first distance along the flanking direction from the top end of the inner sidewall and the base end of the outer sidewall is placed at a second distance along the flanking direction from the base end of the inner sidewall,
• wherein the outer sidewall of each leg converges towards the inner sidewall and/or the inner sidewall of each leg converges towards the outer sidewall, so that a ratio between the second distance and the first distance is lower than 1,
• wherein the base comprises two reinforcing elements placed externally to the legs of the bridge with respect to the flanking direction, and
• wherein each reinforcing element is defined by a longitudinal beam the longitudinal axis of which is orthogonal to the flanking direction.