The unit modular technique is one in which unit modules are prefabricated at a factory and then transported to a construction site for assembly. When the external wall, windows, etc. is damaged during the transportation, the efficiency of unit modular method is deteriorated. Taking this into account, in this study an adapter block used to fix the unit module to a truck was proposed to ensure no damage was caused to the external wall. The L-type adapter block proposed in this study was evaluated the structural safety through simulation method. The result of the simulation is that it seems desirable to set the working load of the L-type adapter block as 15kN for Case 1 and as 30kN for Case 2. Therefore, when the L-type adapter block is utilized under the conditions in which the same load is applied as in Case 2, it is expected that safety will be improved.
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