A vacuum insulated glass (VIG) unit frame assembly , wherein said vacuum insulated glass unit frame assembly comprises: a rectangular vacuum insulated glass unit comprising two glass sheets separated by a gap between said glass sheets , wherein a plurality of support structures are distributed in said gap and wherein said gap is sealed, and a frame comprising elongated frame profile arrangements (20a-20d) which frames said vacuum insulated glass unit in a frame opening extending in a frame opening plane (P2) defined between the elongated frame profile arrangements (20a-20d), and wherein said frame comprises a fixation system fixating the vacuum insulated glass unit at the frame , wherein said fixation system is arranged so as to allow edges (8a-8d) of said vacuum insulated glass unit to thermally deflect (DIS4) in a deflection direction (D1, D2) perpendicular to said frame opening plane (P2) due to a temperature difference (ΔT = T1 - T2) between the two glass sheets , wherein said fixation system is configured to allow the magnitude of said thermal deflection (DIS4) to vary along the edge (8a-8d) between the corners where the respective edge (8a-8d) terminates, wherein said fixation system is arranged to provide a resistance against said thermal deflection (DIS4) of at least two opposing edges (8a-8d) of said vacuum insulated glass unit , said resistance being substantially lower at corner parts of the edges (8a-8d) than at centre parts of the edges (8a-8d), whereby the ratio between the compression force on the fixation system and the thermal deflection (DIS4) at positions at the corner parts is less than half of the corresponding ratio at the centre part of an edge (8a-8d), and wherein said centre parts of said at least two opposing, parallel edges (8a-8d) constitute at least a third, such as half of the extend of the edge (8a-8d) between said corners . a rectangular vacuum insulated glass unit comprising two glass sheets separated by a gap between said glass sheets , wherein a plurality of support structures are distributed in said gap and wherein said gap is sealed, and a frame comprising elongated frame profile arrangements (20a-20d) which frames said vacuum insulated glass unit in a frame opening extending in a frame opening plane (P2) defined between the elongated frame profile arrangements (20a-20d), and wherein said frame comprises a fixation system fixating the vacuum insulated glass unit at the frame , wherein said fixation system is arranged so as to allow edges (8a-8d) of said vacuum insulated glass unit to thermally deflect (DIS4) in a deflection direction (D1, D2) perpendicular to said frame opening plane (P2) due to a temperature difference (ΔT = T1 - T2) between the two glass sheets , wherein said fixation system is configured to allow the magnitude of said thermal deflection (DIS4) to vary along the edge (8a-8d) between the corners where the respective edge (8a-8d) terminates, wherein said fixation system is arranged to provide a resistance against said thermal deflection (DIS4) of at least two opposing edges (8a-8d) of said vacuum insulated glass unit , said resistance being substantially lower at corner parts of the edges (8a-8d) than at centre parts of the edges (8a-8d), whereby the ratio between the compression force on the fixation system and the thermal deflection (DIS4) at positions at the corner parts is less than half of the corresponding ratio at the centre part of an edge (8a-8d), and wherein said centre parts of said at least two opposing, parallel edges (8a-8d) constitute at least a third, such as half of the extend of the edge (8a-8d) between said corners . <EOS>