equal to the thickness of the portion of the saddle 36 within the recess 38 so that that portion of the saddle 36 is generally flush with the surface 26 the saddle 36 vane 22 and recess 38 in the surface 26 of the platform 24 are shown as having complementary configurations that form shiplap joints therebetween as evident from fig4 in particular both the seal 34 and saddle 36 is depicted as having l shaped cross sections that nest with each other and with a recess 40 defined in a wall of the vane 22 defining overlaps in both the plane parallel to the surface 26 and the plane normal to the surface 26 the presence of in series shiplap joints serves to reduce gas leakage between the vane 22 and platform 24 as noted above the fins 30 serve to reduce the temperature of the platform 24 by promoting radiation heat transfer from the platform 24 and reducing the thermal mass of the platform 24 with the combination of the seal 34 and saddle 36 represented in fig3 through 5 the interface structure 32 thermally insulates the vane 22 from the platform 24 thereby reducing thermal gradients within the vane 22 that could cause structural damage the interface structure 32 further enables the vane 22 to be secured to the platform 24 in a manner that allows the vane 22 to expand.