受压弦杆 meaning in English

compression boom
compression chord

Cross - check the main roof truss roof installation quality of the surface is not perpendicular to the vertical center two blocks ; roof surface pressure chord of the roof truss vertical bending side , we must ensure that such errors do not exceed the allowable deviation to ensure roof stability and comply with the design requirements of the state by force
屋架安装质量主要检查屋架跨中对两支座中心竖向面的不垂直度;屋架受压弦杆对屋架竖向面的侧面弯曲,必须保证上述偏差不超过允许偏差,以保证屋架符合设计受力状态及整体稳定要求