MIT OpenCourseWare http://ocw.mit.edu 4.510 Digital Design Fabrication Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.ornamental structures assignment 5 | digital design fabricationwarm up this segment utilized dovtail joints to lock the ‘tails’ to the ‘knuckle’ideal jointthe first approach to this assignment, was to create a joint that used the same dove-tail connection to lock together the ribs of the wall system, as well as the flanges thatclip the wall panel in place. while this unit held together nicely, it is not easily scal-able to the entire wall, as the major structural elements have to run continuous overthe course of the wall. the second attempt tried to address this problem by makingthe joint that connects both modular frame systems as well as infill attachments. this version proved to be structually unstable, and did not make any provision for cross-bracing, and the bridle joint at the knuckle posed a problem when addressing edgeconditions. while it appears to work well for the field condition, it was scrapped for aversion that can adapt to edge and field positions.ideal jointthe final joint provides structural stability in multiple directions through crossbracingand is easily adaptable to both field and edge conditions. Each element in the assem-bly is modular and is discontinous across the wall. The joint requires careful assemblyand when the final post is put in place, then entire joint is locked together. It only relieson friction to hold the final piece in the assembly, but this piece is not subjected to fric-tion forces.the ideal joint was made of only 3different elements, the frame, the crossbracing and the pin the final wall configuration the real jointwhile it was anticipated that this joint would require minimal variation across the wall, itbecame immediately apparent that few elements from the sixteen joints are reusable.A host of variations of the joint, cross bracing, pin and even the frames was required to produce the sixteen separate conditions in the nine-panel wall. The crossbracing also required a joint Rather than customize the frame the pint was expanded to and ‘L’ toin order to make the structure continu-in every location where there was provide bracing across the wall, and inous, but also modular. Because of the no crossbracing connection, it order to address both field and edgevarious edge conditions, there were became apparent that additional conditions, the pin varied between an Lseveral variations on the most simple blocking was necessary to fill out and a T. In addition the pin was rede-connection element. and make the joint standardized. signed to provide a locking connectionbetween all the elements. While the frame was the onlyelement that remained relativelyconstant across the wall, to givethe wall the correct proportions,two versions of the frame were necessary.9 x 9 wall
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