17) 多層建築物におるけ同時流出について : 第6報 個別的図式解法II

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  • 17) SIMULTANEOUS EVACUATION FROM FLOORS OF MULTI-STOREY BUILDING
  • 多層建築物における同時流出について-6-
  • タソウ ケンチクブツ ニ オケル ドウジ リュウシュツ ニ ツイテ 6

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In case of the outbreak of a fire or other condition dangerous to life in Multi-Storey buildings, evacuations onto the stairs occur simultaneously from each floor soon after an alarm or the announcement to the occupants to leave the building. To minimize danger to life from fire, smoke, fumes or panic before building are vacated, there must be the means of exits sufficient to permit prompt escape of occupants. To obtain the adequacy of menas of exits, it is first necessary to know the time which will he required for evacuation from each storey. Here, I tried for the method of calculating that time for evacuation graphically as the base for determining necessary width of stairs, landings or platforms. But in order to ascertain the requisite width of staircase, it will first be necessary to assume a width and then to determine whether it is adequate. The storey heights, number of people and width of stair on each floor or storey may be varied or equal. This graphic solution is related with the one on the same theme which was reported on Transactions of the A.I.J., No. 66.

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