在遍寻了整个房子后，他走出到29楼的阳台，看到梯子支撑着铁栏杆。
After searching the apartment, he walked out to the 29th-floor balcony and saw a ladder propped up against the railing.
建筑师解释说：“主楼梯是从上面的横梁上架起来的，用来支撑每一个踏板栏杆作为楼梯的护栏。”
"The main stair is strung from beams above, and the rods used to support each tread serve as guardrail for the stair," the architects explained.
栏杆柱支撑着栏杆。
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