某原料均化库厂房，跨度48m，柱距12m，采用三铰钢架结构，并设置有悬挂的胶带机通廊和纵向天窗，厂房剖面如题图中的(a)图所示。

刚架梁(A1)，桁架式大檩条(A2)，椽条(A3)及屋面水平支撑(A4)的局部布置简图如(b)图所示。屋面采用彩色压型钢板，跨度4m的冷弯型钢小檩条(图中未示出)，支承在刚架梁和椽条上，小檩条沿屋面坡向的檩距为1.25m。跨度为5m的椽条(A3)支承在桁架式大檩条上：跨度12m的桁架大檩条(A2)支承在刚架梁(A1)上，其沿屋面坡向的檩距为5m，刚架柱及柱间支承(A7)的局部布置简图如(c)图所示。桁架式大檩条结构简图如(d)图所示。

三铰拱刚架结构采用Q345B钢，手工焊接时使用E50型电焊条：其他结构采用Q235B钢，手工焊接时使用E43型电焊条：所有焊接结构，要求焊缝质量等级为二级。

山墙骨架柱间距4m，上端支承在屋面横向水平支承上；假定山墙骨架柱两端均为铰接。当迎风面山墙上的风荷载设计值为0.6kN/mm²时，试问，作用在刚架柱顶的风荷载设计值W₁（kN）应与下列（）项数值最为接近。

提示：参见题24～29图中的c图，在刚架柱顶作用风荷载W₁。

A．205

B．172

C．119

D．93

Slavery was abolished in AHFC. Segregation in the AIE0s, however, was still epidemic in the United States. In the northern states it was the custom, while in the southern states it was the law. For example, in Montgomery, Alabama, in AIED, a black citizen was not allowed to sit in the front. If the front was full and more white passengers got on the bus, he had to give up his seat in the back and ride standing. One small event, which happened on Thursday, December A, AIEE, helped change the direction of American history. That day, Mrs. Rosa Parks refused to give up her seat to a white man and she was arrested. Dr. Martin Luther King heard about this and decided to help her. They organized a bus boycott for one day, which was completely successful. Afterwards, he advocated nonviolence protest against segregation. Although suffering greatly from distress, he stuck it out. Due to his unswerving struggle, the Civil Right Act of AIFD was passed. Dr. King also received the Nobel Peace Prize. Unfortunately, Dr. King was shot to death by a white man on April D, AIFH. The civil rights movement, however, continues. Prejudice and discrimination still exist and there is a long way to go to abolish them completely.