Chicago : Engineering and Contracting Pub. Co. · leaf 472
laced above and bolted in position at the bottom andbrought to the proper lines of the shaft. Theconcrete was then mixed in a cubical mixerlocated at the top of shaft, poured into thebucket, lowered, distributed into the form bymeans of a movable chute supported on a tem-porary platform at the top… … NO. 4 HOISTING SHAFT. Thick- Total ness depth to of bed bottom Material. in feet, of bed. Fill 5.00 5.50 Surface soil 5.00 10.50 Sandy clay 8.50 19.00 Hard pan 1.00 20.00 Fine sand (water) 4.00 24.00 Sand and gravel (water) 4.50 28.50 Fine sand (water) 7.00 35.50 Blue drift (clay) 1.00 36.50 Blue…
Buildings
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