Lock assembly (1, 201) comprising a housing (10, 210), a front plate (11, 211) at one side of the housing (10, 210), a first opening (12, 212) in the front plate (11, 211) and a bolt assembly (2, 202) which is placed within the housing (10, 210), wherein the lock assembly is provided with a bolt bearing that bears the bolt assembly (2, 202) with respect to the housing (10, 210), wherein the bolt bearing allows for a translation of the bolt assembly (2, 202) with respect to the housing (10, 210) along a bolt path between a retracted position wherein the bolt assembly (2, 202) is substantially retracted into the housing (10, 210) and an extended position wherein the bolt assembly (2, 202) extends from the housing (10, 210) through the first opening, wherein the lock assembly (1, 201) is provided with a primary blocking element (6, 206) and a primary blocking bearing that bears the primary blocking element (6, 206) with respect to the housing, wherein the primary blocking bearing (6, 206) allows for a movement of the primary blocking element (6, 206) with respect to the housing (10, 210) along a primary blocking path transverse to the bolt path between a primary blocking position and a primary unblocking position, wherein the primary blocking element (6, 206) is fixed with respect to the housing (10, 210) against translation in the direction of the bolt path, wherein the bolt assembly (2, 202) and the primary blocking element (6, 206) comprise a first abutment surface (59, 258) and a second abutment surface (68, 269), respectively, wherein the second abutment surface (68, 269), when the bolt assembly (2, 202) is in the extended position and the primary blocking element (6, 206) is in the primary blocking position, abuts the first abutment surface (59, 258) in a primary abutment point, wherein the normal vector of the abutting abutment surfaces (59, 68, 258, 269) at the primary abutment point is under an angle in a range of one to thirty degrees with respect to the bolt path, characterized in that the lock assembly (1, 201) comprises a secondary blocking element (8, 208) and a secondary blocking bearing that bears the secondary blocking element (8, 208) with respect to the housing (10, 210), wherein the secondary blocking bearing allows for a movement of the secondary blocking element (8, 208) with respect to the housing (10, 210) along a secondary blocking path transverse to the primary blocking path between a secondary blocking position and a secondary unblocking position, wherein the secondary blocking element (8, 208) is fixed with respect to the housing (10, 210) against movement in the direction of the primary blocking path, wherein the primary blocking element (6, 206) and the secondary blocking element (8, 208) comprise a third abutment surface (65, 365) and a fourth abutment surface (88, 288), respectively, wherein the fourth abutment surface (88, 288), when the primary blocking element (6, 206) is in the primary blocking position and the secondary blocking element (8, 208) is in the secondary blocking position, abuts the third abutment surface (65, 365) in a secondary abutment point, wherein the normal vector of the abutting abutment surfaces (65, 88, 288, 365) at the secondary abutment point is under an angle in a range of one to thirty degrees with respect to the direction of the primary blocking path at the secondary abutment point.