Abstract: A device is provided for positioning a first structural member relative to a second structural member, the second structural member being attractable to a magnetic material. The device comprises a body comprising the magnetic material and having an engagement surface adapted for engagement with and magnetic attachment to a surface of the second structural member. An elongate lever arm having a first lever arm end is connected to the body. A second lever arm end extends laterally outward from the body. The device further comprises a jacking arrangement attached to the second lever arm end. The jacking arrangement has an engagement member adapted for selectively engaging and applying a force to the first structural member to move at least a portion of the first structural member relative to the surface of the second structural member.