Bolt extension as link which do not destroy connective by component at process unload tide usedmany in so many industrial area like at bridge construction, building construction and variousappliance of engine tool. Usage of amount 3 (bolt fruit three) at 5 (standard hole five) at oneparticular extension construction can be seen at tacking on two plate with bevel form at buildingroof construction. If usage more at one particular construction extension hence will have an in withwide of section, apart between hole at each bolt as well as its esthetics value. Formation arrangesituation an bolt extension at one particular construction very having an effect on to failure ofextension construction, is in this case done conducted by examination to an extension constructionby 3 bolt fruit at 10 position differ from the target of searching optimal position in accepting styleshift at bolt extension construction used by bolt is galvanic type have full of thread to. Is later got bytension value shift at each bolt and got by optimal position (strong position) and weak position from10 existing position in accepting style shift [at] extension construction. Optimal position in thisexperiments are position 2 and 4. The position not optimal is position 6.
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