separated by a sidewall 56 sidewall 56 of the body 49 extends from the first end 52 to the second end 54 at either approximately a 90 degree angle or at an obtuse angle such that the sidewall 56 flares between the second end 54 and the first end 52 first end 52 may be open as shown or may be completely or partially closed as long as the selected material is the proper stiffness to allow for the correct amount of deflection under loading it will also be understood that while the illustrated embodiment of the interface pad 22 d shows tubular body 49 as an approximately cylindrical shape similar shapes such as squares rectangles ovals or other shapes may also be used likewise the tubular body may be hollow as shown or may be partially or completely solid as long as the selected material has the properties to perform as desired under loading lip 50 may be provided at first end 52 extending outwardly of sidewall 56 as shown or inwardly to close or partially close first end 52 lip 50 may also be omitted although it may be preferable in that case to provide a sufficiently large flare in sidewall 56 to ensure that the interface pad 22 d cannot be removed from the concrete tie by pulling on second end 54 alternatively or in addition one or more ribs 57 or other protrusions maybe provided within body 49 to assist in preventing body 49 from rotating within the concrete tie second end 54 may be provided with a contact pad 58 defined by sidewall 60 having an outer perimeter that is preferably somewhat smaller than the perimeter of the sidewall 56 but the perimeter of contact pad 58 could in fact be nearly the same.