SKTTIXC HAU'OXY HKAMS \\D (Ol.lMNS AT 33n KIXM)K 



14th story 10-in. 30-lb. channels, which arc main- 

 tained to the basement story. The short diagonals 

 change at the 23d floor to 4 x 3 x 8-lb. angles, and 

 at the 19th floor to 7-in. 5^-lb. single channels, at the 

 12th floor to 8-in. 12f-lb. channels, which continue 

 the same size through the remaining stories to the 

 basement. 



"In eight panels the wind braces terminate at 

 the 2d floor and in eight panels they are carried en- 

 tirely independent, but at the Hroadway front the 

 irregular location of the piers led to a special arrange- 

 ment and to double grillage beams, as indicated in 

 the part plan. In nine sets of bracing below the 

 12th floor all panels have full-length diagonals with- 

 out special provision for window or door openings. 

 In these- panels the horizontal struts are all pairs of 

 l.j-in. :5.'5-lb. channels and the diagonals are single 

 10-in. 30-lb. channels. In five panels the bracing 

 terminates at the basement floor where the columns 

 are seated on the grillages and transmit the wind 



stresses directly to the foundation. In three panels 

 the bracing is extended one story lower to reach the 

 lower end of the columns at the pump-room floor. 



"The regular bracing corresponds to the 1st 

 story and all members are shipped separately and 

 field-riveted together at the intersections of diago- 

 nals and at extremities to the connection plates 

 shop-riveted to the column. As the webs of the diago- 

 nal channels are in the same vertical plane, one of 

 them is cut to clear the other and is spliced across it 

 by a web plate shop-riveted to both pieces and field- 

 riveted to the intersecting channel. The portal brac- 

 ing between columns in the 2d floor is of two types, 

 one having simple knee-braces connected to vertical 

 web plates riveted between the channels forming a 

 horizontal strut and projecting below their lower 

 Manges, and the other type having scmidiagonals at- 

 tached to the lower flanges of the horizontal struts 

 and braced at their center points with horizontal and 

 diagonal members." 



I -"' I 



