Abstract: A clamp comprises a lower section and an upper section. The lower section has a U-shaped cross-section forming a channel extending along a first axis. The channel has a flat bottom and two sides extending from the bottom along a second axis. Openings are formed in the bottom of the channel. The upper section has two elongate plates that extend from the two sides of the channel along the first axis. The elongate plates are offset along the second axis from the bottom of the channel. Apertures pierced along a third axis are distributed along the first axis on each of the elongate plates. Corresponding apertures pierced in the two elongate plates are coaxial with each other. Two clamps are anchored on a wall at their channels and two brackets are bolted to the clamps to support a compressor while providing clearance of the compressor from the wall.