Abstract: Top plate tie-down arrangements are used for securing the roof of a structure against damage caused by high winds, earthquakes, and the like by anchoring the top plate of a wall to a foundation slab. An anchor for use in a top plate tie-down arrangement has a self-tapping thread on one end that allows it to be threaded into a hole drilled into the slab. The upper end of the anchor, which protrudes through a sill plate, is threaded to engage a connecting nut that ties the anchor to an elongated vertical fastener attached to the top plate. The lengths of various portions of the anchor and of the hole into which it is threaded are selected so that the sill plate is captured between the connecting nut and the slab.

Abstract: An arrangement for anchoring a roof of a building so that it can resist wind forces captures each roof truss, or other roof framing member, under a wire rope passed through a sequence of eyebolts protruding above a top plate of one of the walls of. Each of the eyes is the upper portion of one of a plurality of rod assemblies, each of which is connected to a respective one of a plurality of anchors disposed beneath the wall. A turnbuckle connecting each rod assembly to a respective eyebolt is used to draw the eyebolt down against the top plate and hence apply tension to the wire rope. A connecting nut at the bottom of each rod assembly attaches the rod assembly to a threaded upper end of an anchor set in the foundation of the building. Thus, tightening the turnbuckles firmly ties down the roof to the foundation.