Abstract: The invention relates to a coupling element comprising a body with an axial axis arrangeable in an opening of an object, which body is provided along its outer periphery with at least one outward extending locking cam, wherein the body is provided with at least one resiliently movable tongue extending therefrom, to which tongue the locking cam is connected, wherein the at least one tongue is movable inward by a force being exerted thereon.

Abstract: The invention relates to a modular construction system comprising at least one object and a coupling element releasably connectable to the object, wherein: the object comprises at least one surface with at least one opening, which opening comprises a number of inward extending lips arranged distributed over the periphery of the opening; the coupling element comprises a body with an axial axis arrangeable in the opening, which body is provided along its outer periphery with at least one outward extending locking cam; wherein the coupling element is arrangeable in at least one arranging orientation in the opening of the object, and is rotatable in the opening relative to the object to at least one locking orientation, in which locking orientation the coupling element is locked in an axial direction and a rotational direction. The invention also relates to a coupling element, object and tool intended and configured to form part of such a modular construction system.

Abstract: The invention relates to a device for fixing a gutter to a building construction, and a building construction with such a device, the device comprising: —a fixing member for arranging fixedly on the building construction; —a support member releasably connectable to the fixing member for supporting the gutter, the support member comprising two connecting elements extending at an angle to each other, wherein: —a first connecting element of the two connecting elements is configured to be connected releasably to the fixing member and extends substantially parallel to the building construction, and—the second connecting element is configured to be connected to the gutter and extends substantially vertically. The invention further relates to a building construction with a number of such devices, and to such a fixing member and support member.