main stair

基本解釋

The information center program is on the second floor so the Main exterior stair is link directly from the plaza that opens to the public.
信息中心功能在二樓，因此主外部樓梯直接連接向公眾開放的廣場。
There are four key points of plate spiral stair design, and they are model building, inner force calculation, overall stability analysis and joints design between the stair and the main structure.
對板式鋼結(jié)構(gòu)旋轉(zhuǎn)樓梯的有限元計算進(jìn)行了全面的分析，并對其與主體結(jié)構(gòu)的連接節(jié)點(diǎn)進(jìn)行了設(shè)計。
Doors of engine casing and stair casing on main deck are of fire doors with self-closing device.
主甲板機(jī)艙棚圍壁和梯道環(huán)圍等處安裝的門為帶閉門器的防火門。