viii CONTEXTS 



PAOCfl 



given points. Application of equilibrium polygon to calculation of 

 stresses. Relation of equilibrium polygon to bending moment 

 diagram 159-1'^ 



II. CONCRETE ANI MA^OXKY Ai;< HKS 



Definitions and construction of arches. Load line Linear arch. 



Conditions for stability. Maximum compressive stress. Loca- 

 tion of the linear arch: Moseley's theory. Application of the 

 principle of least work. Winkler's criterion for stability. Km- 

 pirical formulas. Designing of arches. Stability of abutments. 

 Oblique projection of arch 168-181 



III. Ai:< in i' Kir.- 



Stress in arched ribs. Three-hinged aivlu-d rib. Two-hinged 

 arched rib. Second method of calculating the pole distance. 

 Graphical determination of the linear arch. Temperature stresses 

 in two-hinged arched rib. Continuous arched rib fixed at both 



ends Graphical determination of tin- linear arch for continuous 



arched rib. Temperature stresses in continuous arched rib . . . 182-194 



rilAI'TKK XI 

 FOUNDATIONS AM) RETAINING WALLS 



Bearing power of soils. Angle of repose and coefficient of fric- 

 tion. Bearing power of piles. Ordinary foundations. Column 

 footings. Maximum earth ]>r-uiv ;t^ain>t ivtainini; walls. 

 Stability of retaining walls. Thickness of retaining walls . . 



PART II PHYSICAL PROPEPcTIES OF MATERIALS 

 CHAPTER XII 



IRON AM) STKEL 



Introductory Tension tests Compression tests Flexure 



tests Method of holding tension specimens. Behavior of iron 



and steel in tension. Effect of overstrain on wrought iron and mild 

 steel Relative strength of large and small test pieces. Strength 



