Plate IV. 



r.9"»445"*25' I 



iecti'on of Beam "B 



EEl:: 



*N | 



111' 



I0'j<— 2 ' — ^.I0« A' ■4-" »t.|0".f .-l 



\m^^^±*:^ : v-:^ 



2_U« 6' 



Dra/. 



Steel in Operating Platform oyer Opening A. 



