()LD/T 106-1998 l()()2()() GBl2801-91 GB/T15236-94 ()3 ()1033.1() construction project ()()()3.21abour safety and health33forecast evaluation of labur safety and health () 34hazardous factors35harmful factors36harmful substances3.7toxic substances38unit of evaluation39hazardous degree310endanger degree4()55152() 53 () () 54() 55 ()5657 ()661 611 3() () 612() ()613614()615 6151 6152 6153 6154 6155 616 62771 711 7111 7112 7113() 712 7121 7122 713 71.4 7141() 7142 715 ,71.672881 82 83 84 85 86(1) () (2)()(3)