Lightweight wall for a vehicle, comprising: a wall panel; a plurality of scaffolding struts (110, 120), each scaffolding strut (110, 120) having a first end (111, 121) and a second end (112, 122); a plurality of connectors, each connector having at least two joining points; and a support structure strut; wherein the first end (111, 121) of a first scaffolding strut (110, 120) is connected to a joining point of a first connector; wherein the second end (112, 122) of the first scaffolding strut (110, 120) is connected to a joining point of a second connector; wherein the scaffolding struts (110, 120) together with the connectors form a wall scaffolding, wherein the connectors correspond to nodal points of the wall scaffolding; wherein the wall panel is arranged in an opening of the wall scaffolding defined by the scaffolding struts (110, 120); wherein a first end of the support structure strut is attached to a further joining point of the first or the second connector; wherein a second end of the support structure strut is configured to be connected to a surrounding structure; characterized in that the lightweight wall further comprises a flap device, the flap device having: a folding panel; a pivot mechanism; and a locking mechanism; wherein the folding panel is located in a closed position in an opening defined by the scaffolding struts (110, 120); wherein the locking mechanism releasably connects the folding panel to a surrounding structure in the closed position; wherein the pivot mechanism pivotally connects the folding panel at an underside to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the pivot mechanism is configured to allow the folding panel to pivot open to an open position; wherein the pivot mechanism comprises a four-bar linkage; wherein the four-bar linkage is attached with a first side to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the four-bar linkage is attached with a second side to the folding panel; and whereby the four-bar linkage enables simultaneous pivoting about two axes of rotation that run parallel to each other. a wall panel; a plurality of scaffolding struts (110, 120), each scaffolding strut (110, 120) having a first end (111, 121) and a second end (112, 122); a plurality of connectors, each connector having at least two joining points; and a support structure strut; wherein the first end (111, 121) of a first scaffolding strut (110, 120) is connected to a joining point of a first connector; wherein the second end (112, 122) of the first scaffolding strut (110, 120) is connected to a joining point of a second connector; wherein the scaffolding struts (110, 120) together with the connectors form a wall scaffolding, wherein the connectors correspond to nodal points of the wall scaffolding; wherein the wall panel is arranged in an opening of the wall scaffolding defined by the scaffolding struts (110, 120); wherein a first end of the support structure strut is attached to a further joining point of the first or the second connector; wherein a second end of the support structure strut is configured to be connected to a surrounding structure; characterized in that the lightweight wall further comprises a flap device, the flap device having: a folding panel; a pivot mechanism; and a locking mechanism; wherein the folding panel is located in a closed position in an opening defined by the scaffolding struts (110, 120); wherein the locking mechanism releasably connects the folding panel to a surrounding structure in the closed position; wherein the pivot mechanism pivotally connects the folding panel at an underside to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the pivot mechanism is configured to allow the folding panel to pivot open to an open position; wherein the pivot mechanism comprises a four-bar linkage; wherein the four-bar linkage is attached with a first side to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the four-bar linkage is attached with a second side to the folding panel; and whereby the four-bar linkage enables simultaneous pivoting about two axes of rotation that run parallel to each other. a folding panel; a pivot mechanism; and a locking mechanism; wherein the folding panel is located in a closed position in an opening defined by the scaffolding struts (110, 120); wherein the locking mechanism releasably connects the folding panel to a surrounding structure in the closed position; wherein the pivot mechanism pivotally connects the folding panel at an underside to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the pivot mechanism is configured to allow the folding panel to pivot open to an open position; wherein the pivot mechanism comprises a four-bar linkage; wherein the four-bar linkage is attached with a first side to a horizontal scaffolding strut of the plurality of scaffolding struts (110, 120); wherein the four-bar linkage is attached with a second side to the folding panel; and whereby the four-bar linkage enables simultaneous pivoting about two axes of rotation that run parallel to each other.