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現有的塔式起重机載重稳定性的計算方法极不精确。这一計算方法远在1936—1937年已經提出,因为当时还没有研究起重机的动力学,自然在这个計划方法中沒有考虑到影响起重机工作的許多因素。为了計算塔式起重机的載重稳定性,曾使用以下公式:式中:M_1,M_2,M_3,M_4,M_5,M_6和M_Q——由以下各力产生的傾翻力矩: P_1——在起重机构起动或制动时重物質量产生的慣性力;
The calculation method of the load stability of the existing tower crane is extremely inaccurate. This method of calculation was proposed as far back as 1936–37, because at that time the dynamics of the crane had not been studied. Naturally, many factors affecting crane work were not taken into account in this planning method. In order to calculate the load-bearing stability of the tower crane, the following formula has been used: where: M_1, M_2, M_3, M_4, M_5, M_6, and M_Q - Tilting moments generated by the following forces: P_1 - in crane construction Inertial force resulting from the weight of the weight when starting or braking;