A modular machine support frame for supporting a machine, the frame comprising - a top part comprising a horizontally extending support plate with mounting structures on top of the support plate for mounting the vibration sensitive machine, and a set of horizontally elongate top bars connected to a bottom of the support plate; - a bottom part comprising a set of horizontally elongate bottom bars configured to support the frame on a floor; and - an intermediate part comprising a set of vertically (XZ,YZ) extending side plates connected between the top and bottom parts (10,30); wherein the side plates are fixed by bolting to respective vertical sections (11v,31v) formed by downward and upward (±Z) extending parts of the horizontally elongate top and bottom bars (11,31), respectively; wherein the top part of the frame is carried by the side plates at an adjustable height from the floor; wherein the vertical sections (11v,31v) in at least one of the top and bottom bars (11,31) comprise a respective plurality of vertically extending elongate slots (11s, 31s) arranged side-by-side horizontally along a respective length of the at least one of the horizontally elongate top and bottom bars (11,31) for the bolting of the side plates at a specific position (ΔH) along a length of the slots (11s, 31s) to determine the adjustable height, wherein the respective vertical sections (11v,31v) of the top and bottom bars (11,31) are sandwiched between respective sets of at least two of the side plates on either sides of the vertical slots (11s, 31s), wherein each set of side plates is held together by a plurality of adjacent bolts through adjacent slots (11s,31s) of the respective plurality of vertically extending elongate slots (11s, 31s), wherein the side plates are respectively bolted to the top bars and/or bottom bars by the adjacent bolts arranged with a bolting density of between five and fifty bolts per meter per bar; wherein, by the bolting through the side plates sandwiching the vertical sections (11v,31v), respective friction connections are formed with at least two frictional surfaces on either side of the vertical sections (11v,31v) between each side of the respective vertical section (11v,31v) and side plate for the carrying of the top part of the frame while maintaining the specific position (ΔH) of the bolting along the slots (11s, 31s). - a top part comprising a horizontally extending support plate with mounting structures on top of the support plate for mounting the vibration sensitive machine, and a set of horizontally elongate top bars connected to a bottom of the support plate; - a bottom part comprising a set of horizontally elongate bottom bars configured to support the frame on a floor; and - an intermediate part comprising a set of vertically (XZ,YZ) extending side plates connected between the top and bottom parts (10,30); wherein the side plates are fixed by bolting to respective vertical sections (11v,31v) formed by downward and upward (±Z) extending parts of the horizontally elongate top and bottom bars (11,31), respectively; wherein the top part of the frame is carried by the side plates at an adjustable height from the floor; wherein the vertical sections (11v,31v) in at least one of the top and bottom bars (11,31) comprise a respective plurality of vertically extending elongate slots (11s, 31s) arranged side-by-side horizontally along a respective length of the at least one of the horizontally elongate top and bottom bars (11,31) for the bolting of the side plates at a specific position (ΔH) along a length of the slots (11s, 31s) to determine the adjustable height, wherein the respective vertical sections (11v,31v) of the top and bottom bars (11,31) are sandwiched between respective sets of at least two of the side plates on either sides of the vertical slots (11s, 31s), wherein each set of side plates is held together by a plurality of adjacent bolts through adjacent slots (11s,31s) of the respective plurality of vertically extending elongate slots (11s, 31s), wherein the side plates are respectively bolted to the top bars and/or bottom bars by the adjacent bolts arranged with a bolting density of between five and fifty bolts per meter per bar; wherein, by the bolting through the side plates sandwiching the vertical sections (11v,31v), respective friction connections are formed with at least two frictional surfaces on either side of the vertical sections (11v,31v) between each side of the respective vertical section (11v,31v) and side plate for the carrying of the top part of the frame while maintaining the specific position (ΔH) of the bolting along the slots (11s, 31s).