10 吨、20 吨、32 吨吊车，吊车梁的设计逻辑完全不同。疲劳，是它唯一的敌人。10t, 20t, 32t cranes mean very different girders. Fatigue is the only enemy.
吊车梁是厂房里工作状态最严酷的构件：每天成百上千次往复加载，它的设计核心不是强度，而是疲劳。
按吊车吨位分三档：10t 以下轻级工作制，可采用型钢吊车梁，经济简单；10–20t 中级工作制，多采用焊接工字钢梁，需设置制动结构承担横向刹车力；32t 以上重级工作制，上翼缘与制动板的连接必须按疲劳验算，焊缝等级提高到一级。
三个常见误区：吊车梁跨中拼接缝设在受力最大处、轨道连接采用死固定（应为压板或弯钩螺栓允许调整）、忽视柱间支撑对纵向刹车力的传递路径。
吊车配置请在询价时一次性给全：吨位、台数、轨道型号、工作级别（如 A5/A6），后补的信息往往导致返工。
Crane girders endure the harshest duty in any plant: thousands of load cycles daily. The design core is not strength — it's fatigue.
By tonnage: below 10t (light duty), rolled-section girders are simple and economical; 10–20t (medium duty) typically uses welded I-girders with a braking structure for horizontal traction; above 32t (heavy duty), the top flange and brake-plate connections need fatigue verification and Class 1 welds.
Three common mistakes: splicing the girder at midspan where bending peaks; rigidly fixing the rail (use clamp plates or hook bolts that allow adjustment); and ignoring the load path of longitudinal braking into the column bracing.
When inquiring, give the full crane configuration at once: tonnage, number of cranes, rail type and duty class (A5/A6). Late additions almost always mean rework.
上海雄岚钢结构 · 出口 60+ 国家 · EN 1090 CE 认证 · 24 小时内工程师回复
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