▁f ett ling ▁sh ops ▁and ▁machine ▁sh ops , ▁all ▁suitable ▁for ▁cast ings ▁up ▁to ▁three ▁tons ▁weight . ▁ ▁Although ▁larger ▁cast ings ▁were ▁made ▁by ▁mixing ▁metal ▁from ▁all ▁the ▁sources ▁these ▁were ▁mach ined ▁and ▁finished ▁outside . ▁ ▁The ▁remainder ▁of ▁the ▁site ▁compr ised ▁the ▁Fab ric ation ▁Sh ops , ▁three ▁b ays ▁laid ▁out ▁for ▁the ▁production ▁of ▁w eld ed ▁fabric ations ▁and ▁heat ▁ex ch angers . ▁ ▁Following ▁World ▁War ▁II ▁a ▁new ▁labor atory ▁block ▁was ▁added ▁adjacent ▁to ▁the ▁She ff ield ▁Road ▁entrance . ▁ ▁This ▁compr ised ▁facilities ▁for ▁Chem ical ▁Analysis , ▁Phys ical ▁Test ing , ▁Non - Dest ruct ive ▁Test ing , ▁Mechan ical ▁Test ing ▁and ▁Metal log raph y . ▁This ▁facility ▁also ▁had ▁its ▁own ▁small ▁machine ▁shop , ▁for ▁making ▁mechanical ▁test ▁pieces , ▁and ▁a ▁reference ▁library ▁/ ▁conference ▁facility . ▁ ▁On ▁the ▁She ff ield ▁Road ▁site , ▁a ▁narrow , ▁tri angular ▁section ▁of ▁land ▁between ▁She ff ield ▁Road ▁and ▁the ▁She ff ield ▁to ▁Don c aster ▁railway ▁line , ▁opposite ▁the ▁Imperial ▁site ▁was ▁at ▁its ▁a pe x ▁the ▁Mag net ▁De pt , ▁the ▁steel ▁heat ▁treatment ▁and ▁w are h ous ing ▁section ▁and , ▁opening ▁in ▁ 1 9 2 7 , ▁the ▁first ▁high ▁frequency ▁steel ▁mel ting ▁plant ▁in ▁the ▁country . ▁Front ing ▁She ff ield ▁Road ▁were ▁the ▁main ▁company ▁offices . ▁ ▁A