تحميل كتاب الفصل الرابع مختارات للترجمة عصام مجاهد PDF

تحميل كتاب الفصل الرابع مختارات للترجمة pdf 2014م - 1443هـ الفصل الرابع مختارات للترجمة يضم بعض المختارات للترجمة *** *** THE MEGA HIGH-RISE LIFT DILEMMA : Anytime a high-rise office tower exceeds about 60 stories in height (80 stories for pure double-deck lifts), it probably contains in excess of 93,000 m2 of space, and is usually serviced by four single-deck lifts-up to eight elevators each. The dilemma of how to best serve additional building floors then arises. If we continue attempting to service more upper floors with conventional zones of single-deck or pure double-deck elevatoring solutions, the bottom floor areas are quickly reduced -containing little to nothing but elevator shafts - rendering the project uneconomical. There are at least two viable elevatoring solutions that can be employed to overcome this loss of rentable area and shaft encroachment dilemma: .