274 THE BRACED ARCH. [CHAP. XIV. 



accepted formulae for temperature strains already given, the 

 results are of more importance than the above remarks would 

 indicate. As will be seen in the Appendix, the temperature 

 strains in the braced arch, fixed at ends and continuous at 

 crown, are very considerable, and, if the formulae are accepted 

 as correct, can by no means be disregarded. By comparison of 

 our numerical results for the three cases of braced arch there 

 given, it appears that the one hinged at crown, and springing, 

 is by far the best form of construction, but it must be remem- 

 bered that a different proportion of span to height and depth 

 may considerably affect this conclusion. Upon this point we 

 refer the reader to Art. 28 of the Appendix. 



With the above, we conclude our discussion of braced arches, 

 or arches whose weight is not so great that the effect of the live 

 load can be disregarded, and pass on to the stone arch, or arch 

 proper.* 



* See Appendix, Art. 17, for a practical application of the principles of toil 

 chapter. 



