. The theory of the flexure and strength of rectangular flat plates applied to reinforced concrete floor slabs . Fig. 18. Failure of ^Mushroom Fig. 19. Failure of ISIushroom Slab. Load Removed. FAILURE OF MUSHROOM TEST SLAB 93 8th. The slab carried its final load of over 120 tons for twenty-four hours without giving way. It demonstrated the impossibilityof its sudden failure by gradually yielding until it reached a finaldeflection of some nine inches, as seen in the views of Dec. 17thand 24th, Figs. 18 and 19. 9th. While the slab steel in each belt was the same as in theNorcross slab, t
. The theory of the flexure and strength of rectangular flat plates applied to reinforced concrete floor slabs . Fig. 18. Failure of ^Mushroom Fig. 19. Failure of ISIushroom Slab. Load Removed. FAILURE OF MUSHROOM TEST SLAB 93 8th. The slab carried its final load of over 120 tons for twenty-four hours without giving way. It demonstrated the impossibilityof its sudden failure by gradually yielding until it reached a finaldeflection of some nine inches, as seen in the views of Dec. 17thand 24th, Figs. 18 and 19. 9th. While the slab steel in each belt was the same as in theNorcross slab, the crossing of the belts increased the percentageof slab reinforcement so much above that of the simple belt rein-forcement that stress in the steel did not pass the yield point andthe failure was largely due to the giving way of the concrete aroundthe cap, but partly to some yielding at the line of weakest ultimateresistance, both of which statements are confirmed by the view ofDec. 24th, Fig. 19, where the removal of the loading permits theirregular circular line previously mentioned to be made out at adistance from the center of each column
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