Engineering and Contracting . roofs. Details and Methods of Design.—From an inspection ofFigs. 2 and 3 it will be seen that the roof slab units con-sist of a 3-in. slab, the inner portion of which, 5 ft. 9in. wide, is reinforced transversely between two longi-tudinal beams and an outstanding or cantilever wing por-tion having a 4-ft. projection beyond the outer longitudi-nal beam, which is reinforced longitudinally between can-tilever rib beams spaced 5 ft. on centers. These centi-lever beams are 4 in. deep at the ends and 18 in. deep at October 2Vol. XLVI. 3, 19 16No. 17 359 the connection, w
Engineering and Contracting . roofs. Details and Methods of Design.—From an inspection ofFigs. 2 and 3 it will be seen that the roof slab units con-sist of a 3-in. slab, the inner portion of which, 5 ft. 9in. wide, is reinforced transversely between two longi-tudinal beams and an outstanding or cantilever wing por-tion having a 4-ft. projection beyond the outer longitudi-nal beam, which is reinforced longitudinally between can-tilever rib beams spaced 5 ft. on centers. These centi-lever beams are 4 in. deep at the ends and 18 in. deep at October 2Vol. XLVI. 3, 19 16No. 17 359 the connection, with the longitudinal beam; this section The design features of typical column units are sown in is carried over to the inside longitudinal beam to Fig. 4. These units consist of a 12xl6-in. column with a give added stiffness to the unit and anchorage for the cross beam to support the slab units, which are cast in- reinforcement of the cantilever (see Fig. 3). To facili- tegral with the column. They have an overall length of. Fig. 7—General View of Casting Yard. tate the removal of units from the forfns all beams aregiven a bevel of 3 in. on both sides. The roof slabs and beams were designed for a totalload of 70 lb. per square foot, of which 82 lb. per square L7 ft. 8 in. and weigh about 7,000 lb. each. The columnsare reinforced with four 1-in. square bars tied togetherwith ^,4-in. diameter hoops spaced about 10 in. on protect the edges of column, a steel guard angle about
Size: 1929px × 1296px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
