shaped protrusions which are bonded to k shaped spars having correspondingly shaped intrusions application_number US 22164203 A description referring to fig1 in the drawings a prior art wing construction is illustrated a rib 11 includes channels 13 into which are mechanically installed angle clips 15 angle clips 15 are mechanically coupled to i beams 17 carried by an upper stiffened skin 19 and a lower stiffened skin 21 a c shaped spar 23 is coupled to rib 11 and or upper and lower skins 19 and 21 this is a typical mechanical assembly which requires a relatively large number of parts and which requires a complex assembly process referring now to fig2 a and 2b in the drawings the k spar bonded structure configuration of the present invention is illustrated a rib 31 includes a plurality of generally rhombus shaped intrusions 33 an upper stiffened skin 35 includes a plurality only one shown of generally correspondingly rhombus shaped protrusions 37 that are aligned with rib intrusions 33 on the upper surface of rib 31 in a similar fashion a lower stiffened skin 39 includes a plurality only one shown of generally correspondingly rhombus shaped protrusions 41 that are aligned with rib intrusions 33 on the lower surface of rib 31 it should be understood that the geometric shape of the protrusions can vary widely from application to application a k shaped spar or k spar 51 is configured to conform to the end of rib 31 as best seen in fig2 b k spar 51 is also wedge shaped in the vertical direction having a protruding ridge 57 which mates with an intruding channel 59 in one or more ribs 31 upper skin 35 includes a triangular protrusion 53 likewise lower skin 39.