叉车额定起重量是指货物重心(位于叉车纵向中心平面内)至货叉前壁的距离等于载荷中心距时允许起升的最大重量。实际工作时,货物重心与载荷中心很难重合,当货物重心的位置大于载荷中心距时,由于纵向稳定性的约束,起重量应按“载荷曲线”铭牌(见图1) Forklift rated lifting weight refers to the center of gravity of the cargo (located in the longitudinal center plane of the forklift truck) to the front wall of the fork is equal to the load center distance allows lifting the maximum weight. In actual work, the center of gravity of the cargo is hard to coincide with the load center. When the position of the center of gravity of the cargo is greater than the center of the load, due to the constraint of the longitudinal stability, the lifting capacity should be according to the nameplate of “Load Curve” (see Figure 1)