to temporarily secure the relative position of each item to another during use non limiting examples are clamping type means biasing means such as springs and other biasing expansion member pins turn bolts and slots or receiving holes nuts and bolts and other such mechanisms chosen as a matter of convenience of the user another embodiment of the present invention is an apparatus for securing a first structural member relative to a second structural member this apparatus comprises 1 a first clamp for securing to the first structural member the first clamp comprising a first clamp member and a second clamp member the first and second clamp members having means to adjustably engage securely the first clamp to the first structural member 3 a slide plate member comprising means to adjustably securely engage to the first clamp and means to adjustably engage the support member 4 one or more bracket s having means to slideably engage the support member and having means to adjustably securely engage the second structural member preferably the apparatus is one wherein the first structural member is selected from a group consisting of an i beam a t beam a c beam and an l beam the first clamp can be configured to engage a flange of such first structural member another embodiment is an apparatus for securing a set of two or more first structural members relative to a second structural member said apparatus comprising 1 a first clamp for securing each of said first structural member to said second structural member said first.