100 industrial park road hingham massachusetts 02043 the upper surface of the lubrite plate 47 moreover is convex and is also treated in the above described manner to provide suitable lubrication further in this respect a forged support block 50 has a concave lower surface 51 that conforms with and rests upon the matching convex upper lubricated surface of the lubrite plate 47 a circularly disposed and longitudinally aligned array of bores of which only bores 52 53 are shown have countersunk recesses formed in the concave surface each to accommodate respective bolts only the bolts 54 and 55 having been shown in the drawing the upper surface of the support block 50 has a lower extending flange with a diameter which is somewhat greater than the diameter of the underlying lubrite plate 47 but which is nevertheless still smaller than the diameter of the circular bore 42 that is formed in the base plate 34 in order to provide sufficient clearance to permit the heat exchanger 10 to move relative to the foundation 17 a shear key 56 is diametrically disposed on the upper surface of the support block 50 the shear key 56 is seated in a keyway slot 57 that is formed in a lower contact face in lower forging 60 that forms a portion of the heat exchanger 10 as illustrated in the drawing the bolts 54 55 as well as the other bolts that serve to connect the support block 50 with the lower forging 60 which are.