1. Introduction<br> In building construction, large varieties and tremendous amounts of materials are required. Important planning items to be considered in construction planning include methods of logistic activities (carrying-in, elevating, and transporting), the capacity of construction equipment, scheduling, and the locations and areas of the stock yard for materials.<br> The author's previous paper discussed the methods for representing activity-oriented models such as assembling, installation, and demolition works at a construction site, as well as calculation methodologies for simulation. This paper discussed the method for representing logistics-oriented models such as the activities of carrying-in, elevating, transporting of materials, and carrying-out of waste materials. The author verified the validity of the simulation results based on case studies.<br><br> 2. Components at a construction site<br> When classifying logistics at a construction site, the following three aspects should be considered: (1) the condition of components, (2) the location for unloading components from carts and for unwrapping packages, and (3) the generation of wastes from activities using the materials. Activities for logistics include (1) carrying-in to a site, (2) loading to an elevator, (3) elevating, (4) unloading from an elevator, (5) unloading from a cart, (6) unwrapping a package, (7) transporting to an activity area, and (8) carrying-out of empty carts and wastes from a site.<br><br> 3. Outlines of methodologies for representing activity-oriented work models<br> The author shows methodologies for representing and simulating activity-oriented work models discussed in the previous paper.<br><br> 3. Methodologies for representing logistics-oriented models<br> The above-mentioned logistic activities are modeled based on the work models discussed in the previous paper. For logistics -oriented models, the author creates scripts with various functions to simulate the logistics handling materials at a site. This paper also discussed the representing methods using graph structures and scripts, as to model both constraints of volume in stock area, and the movements of an elevator in detail. The material carrying-in schedules should be decided according to the start dates of each installing work. This paper clarified that the material carrying-in schedule can be obtained through several repeated simulations.<br><br> 4. Application to a construction project<br> In a case study of the methodologies discussed in this paper, work models are created assuming the logistics of interior works for an apartment house. Simulation is carried out at 0.5 minute intervals. An apartment house is 9-stories high with 8 dwellings on each floor (from second to ninth floor), so it has 64 dwellings in total. There are 15 logistic works and 10 interior finishing works. Logistic works are done for each materials, and interior finishing works are done for 64 dwellings. Therefore, the number of works re aches about 900 activities as a whole.<br> Based on the results of simulations, together with the movements of an elevator, detailed time schedules from carrying-in to installation of materials, and time schedules of whole construction works, the author verified that this simulation can reproduce the progress of logistics at a site accurately.<br><br> 6. Conclusion<br> This paper verified that the progresses of logistic activities are reproduced accurately with the proposed simulation models and the simulations.