Tie anchor for sandwich panels of reinforced concrete

Claim 1

A tie anchor for sandwich panels and the like, particularly panels of the type which consist of inner and outer panel layers of concrete and an intermediate layer of an at least partially compressible thermally insulating material, the tie anchor comprising: a continuous strip or band of steel which is shaped into a series of undulations defined by opposing loop portions and substantially straight leg portions connecting the loop portions, the spacing between the opposing loop portions being such that they alternatingly reach into the inner and outer panel layers; and means for anchoring the opposing loop portions in the concrete of the associated inner and outer panel layers; and wherein at least one centrally located leg portion is a diagonal leg portion which is oriented at an angle to a transverse plane that is perpendicular to the panels, thereby serving as a diagonal brace between itsadjoining loop portions in the inner and outer panel; and the other leg portions on both sides f the central diagonal leg portion, or portions, resectively, are oriented parallel to each other and to te transverse plane, thereby serving as parallel links which, by bending within the thickness of the compressble intermediate layer, are capable of accommodating longitudinal displacements of their embedded opposing loop portions which occur, when the inner and outer panels expand and contract unequally in response to temperature changes.