Chicago : Engineering and Contracting Pub. Co. · leaf 77
acks give their 9or 11 jacks a half turn (180°). After this is]done the operation is repeated, all men start-ing their round at the same time. This halfturn raises the forms % in. This indicatesthat the men make 288 rounds in raising thejacks 3 ft. As there are 480 minutes in a dayand it takes a… … Fig. 3.— View of Jacks on Circular Bins. up. When the work is moving forwardsmoothly 3 ft. are poured in 8 hours. In thisbuilding .! ft. of wall includes about 100 cu.yds. of concrete. The rate, however, whichthe building rises is not 3 ft. a day because ofthe delays which are necessary to place…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
