x TABLE OF CONTENTS 



Ketchum's Saw Tooth Roof 186 



Pitch of Roof . . .191 



Pitch of Truss 192 



Economic Spacing of Trusses 192 



Transverse Bents 195 



Truss Details 197 



Columns 202 



Column Details 205 



Struts and Bracing 211 



Purlins and Girts 213 



Design of Parts of the Structure 213 



Design of Trusses 214 



Design of Columns 217 



Design of Plate Girders 221 



Crane Girders 224 



CHAPTER XVIII. CORRUGATED STEEL. 



Introduction 225 



Fastening Corrugated Steel 227 



Strength of Corrugated Steel 230 



Corrugated Steel Details 232 



Anti-condensation Roofing 241 



Corrugated Steel Plans 244 



Cost of Corrugated Steel 244 



CHAPTER XIX. ROOF COVERINGS. 



Introduction 246 



Corrugated Steel Roofing 246 



Slate Roofing 247 



Tile Roofing 250 



Tin Roofs 251 



Sheet Steel Roofing 253 



Gravel Roofing 254 



Slag Roofing 256 



Asphalt Roofing 257 



Shingle Roofs 258 



Asbestos Roofing 258 



