January_1971 — Page 22

447-

L

-

F

-

ф

Fig. 5. Plan detail of high block's precast floor planks

High block

Erection booms in position for lifting main beams

18

וּ

די

TH

THE

*

Placing main beams by means of erection boom at middle span and derrick at top of core wall

Joint between beams and columns before Section of precast floor planks in place before the topping is cast column head is cast