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Show 1: M ROOF Army and Navy Engineers Point Out Evidence of Inferior Work WASHINGTON, Feb. 8. Twenty-one Twenty-one "evidences of work of an Inferior grade for such an important structure" struc-ture" wus submitted late Tuesday In a report on the collapse of the Knickerbocker Knicker-bocker theatre roof by five army and navy engineers at the coroner's Inquest. In-quest. The fall of the roof, with the loss of 98 lives, tho report stated, "was a direct result of failure to sufficiently sufficient-ly provide for the unusual conditions existing at the Junction of the curved Columbia road wall to the stage wall." The report was submitted after testimony tes-timony had been given by Robert Henry Davis, engineer In the building ; Inspector's office, that Iron construction construc-tion intended to support the roof was i below the requirements of the plans for the building filed In the inspector's I office. The "evidences" of weakness In the trui Hire, aS set forth In the report Include: I Use of tile walls to carry heavy con-! con-! central. mI loads. The unusual height and length of !tho unsupported tile wall on "olum-jbla "olum-jbla road. Lack of u column with knee brace or pilasters tinder the main truss at the wall. Inadequate bearings of beams on ;the tile wall v.ith small bearing plates. Insufficient anchorage of steel to walls. Roof slab too thJn for. span and doadlng. and sufficient steel relnforce-I relnforce-I mem . Absence of restraint at sides of roof slabs Celling load concentrated in center .of roof Klab. j Absence of bracing between steel members and particularly at ends of main truss. Use of .bolts Instead of rivets on all field connections and Insufficient bolts at truas connections. NO evidence of increase of reinforcement reinforce-ment In end panels of .dabs. Heavy loud of nine and one-half Inches of cinder concrete fill at center cen-ter of drainage ridge. Ioads of ventilating equipment Where cinder fill occurred and absence jof special bracing to take vibration. |