1.《(?)起(Qi)重(Zhong)机(Ji)械(Xie)安(An)全(Quan)规(Gui)程(Cheng)》(?)中(Zhong)规(Gui)定(Ding)：(?)吊(Diao)钩(Gou)应(Ying)有(You)制(Zhi)造(Zao)单(Dan)位(Wei)的(De)合(He)格(Ge)证(Zheng)等(Deng)技(Ji)术(Shu)证(Zheng)明(Ming)文(Wen)件(Jian)，(?)方(Fang)可(Ke)投(Tou)入(Ru)使(Shi)用(Yong)。(?)否(Fou)则(Ze)应(Ying)经(Jing)检(Jian)验(Yan)，(?)查(Cha)明(Ming)性(Xing)能(Neng)合(He)格(Ge)后(Hou)方(Fang)可(Ke)使(Shi)用(Yong)。(?)

2.起(Qi)重(Zhong)机(Ji)械(Xie)不(Bu)得(De)使(Shi)用(Yong)铸(Zhu)造(Zao)吊(Diao)钩(Gou)；(?)吊(Diao)钩(Gou)宜(Yi)设(She)有(You)防(Fang)止(Zhi)吊(Diao)物(Wu)意(Yi)外(Wai)脱(Tuo)钩(Gou)的(De)保(Bao)险(Xian)装(Zhuang)置(Zhi)；(?)吊(Diao)钩(Gou)表(Biao)面(Mian)应(Ying)光(Guang)洁(Jie)、(?)无(Wu)剥(Bao)裂(Lie)、(?)锐(Rui)角(Jiao)、(?)毛(Mao)刺(Ci)、(?)裂(Lie)纹(Wen)等(Deng)；(?)吊(Diao)钩(Gou)材(Cai)料(Liao)应(Ying)采(Cai)用(Yong)优(You)质(Zhi)低(Di)碳(Tan)镇(Zhen)静(Jing)钢(Gang)或(Huo)低(Di)碳(Tan)含(Han)金(Jin)钢(Gang)；(?)

3.锻(Duan)钩(Gou)一(Yi)般(Ban)应(Ying)用(Yong)GB699—(?)88《(?)优(You)质(Zhi)碳(Tan)素(Su)结(Jie)构(Gou)钢(Gang)技(Ji)术(Shu)条(Tiao)件(Jian)》(?)中(Zhong)规(Gui)定(Ding)的(De)20钢(Gang)；(?)

4.板(Ban)钩(Gou)一(Yi)般(Ban)应(Ying)用(Yong)GB700—(?)88《(?)普(Pu)通(Tong)碳(Tan)素(Su)结(Jie)构(Gou)钢(Gang)技(Ji)术(Shu)条(Tiao)件(Jian)》(?)中(Zhong)规(Gui)定(Ding)的(De)Q235，(?)或(Huo)GB／(?)T1591—(?)94《(?)低(Di)合(He)金(Jin)高(Gao)强(Qiang)度(Du)结(Jie)构(Gou)钢(Gang)》(?)中(Zhong)规(Gui)定(Ding)的(De)16Mn钢(Gang)。(?)

5.吊(Diao)构(Gou)上(Shang)的(De)缺(Que)陷(Xian)不(Bu)得(De)补(Bu)焊(Han)。(?)