A skid base (130, 200) for supporting a prime mover and a driven machine, the skid base comprising: a pair of first support members, each of the first support members having an inner surface along a length of the respective first support member and an outer surface along the length of the respective first support member; and a pair of second support members coupled to the first support members, each of the second support members having an inner surface along a length of the respective second support member and an outer surface along the length of the respective second support member, wherein a portion of the inner surface of each of the second support members overlaps a portion of the outer surface of each of the first support members to form an overlapping section (135, 230) that extends along a length direction of the first and second support members (210, 220), characterized in that: the skid base (130, 200) includes a driven machine section for supporting the driven machine, the driven machine section provided at a first end of the overlapping section (135, 230) and formed by a remaining portion of the second support members, and a prime mover section for supporting the prime mover, the prime mover section provided at a second end of the overlapping section (135, 230) and formed by a remaining portion of the first support members; and the length of the overlapping section (135, 230) is such that the resonant frequency of the modular skid base (130, 200) with the prime mover and the driven machine is outside of an operating frequency of the prime mover. a pair of first support members, each of the first support members having an inner surface along a length of the respective first support member and an outer surface along the length of the respective first support member; and a pair of second support members coupled to the first support members, each of the second support members having an inner surface along a length of the respective second support member and an outer surface along the length of the respective second support member, wherein a portion of the inner surface of each of the second support members overlaps a portion of the outer surface of each of the first support members to form an overlapping section (135, 230) that extends along a length direction of the first and second support members (210, 220), characterized in that: the skid base (130, 200) includes a driven machine section for supporting the driven machine, the driven machine section provided at a first end of the overlapping section (135, 230) and formed by a remaining portion of the second support members, and a prime mover section for supporting the prime mover, the prime mover section provided at a second end of the overlapping section (135, 230) and formed by a remaining portion of the first support members; and the length of the overlapping section (135, 230) is such that the resonant frequency of the modular skid base (130, 200) with the prime mover and the driven machine is outside of an operating frequency of the prime mover. the skid base (130, 200) includes a driven machine section for supporting the driven machine, the driven machine section provided at a first end of the overlapping section (135, 230) and formed by a remaining portion of the second support members, and a prime mover section for supporting the prime mover, the prime mover section provided at a second end of the overlapping section (135, 230) and formed by a remaining portion of the first support members; and the length of the overlapping section (135, 230) is such that the resonant frequency of the modular skid base (130, 200) with the prime mover and the driven machine is outside of an operating frequency of the prime mover.