vi PREFACE 



In writing this book the author has been assisted by several of his former students. Credit 

 is due to Mr. I. C. Crawford, Instructor in Civil Engineering, for assistance in calculating tables 

 and reading proof; to Mr. C. S. Sperry, Instructor in Engineering Mathematics, for assistance in 

 calculating tables; to Professor H. C. Ford, of Iowa State College, and Mr. T. A. Blair, Instructor 

 in Civil Engineering, for assistance in preparing the drawings; and especially to Mr. W. C. Hunt- 

 ington, Assistant Professor of Civil Engineering, for assistance in arranging and calculating tables, 

 reading proof and assistance in other ways. 



The author will appreciate notices of errors and suggestions for the improvement of future 

 editions. 



M. S. K 



BOULDER, COLORADO. 

 August 23, 1914. 



PREFACE TO SECOND EDITION 



In this edition details of steel windows and doors, data on cement and gypsum tile roofs, 

 solutions for bending moments in mill building columns and stresses in stiff frames have been added 

 to Chapter I, and Chapter III, Steel Highway Bridges, has been rewritten and enlarged. All 

 known errors have been corrected. Duties required of the author as Assistant Director in Charge 

 of Construction of the U. S. Government Explosives Plant, Nitro, West Virginia, have made it 

 impossible to complete a more thorough revision that was planned. 



M. S. K. 



U. S. GOVERNMENT EXPLOSIVES PLANT "C," 

 NITRO, WEST VIRGINIA, 



May 12, 1918. 



