The Development of the Elastic Theory of Continuous Frames

MR. K. C. DAVEY (Associate-Member): On the basis of the graphs shown in Fig. 10, I have found it interesting to extract some figures and consider them further, to arrive at a relative cost relationship between them as opposed to the purely weight relationship. I append below in tabulated form comparative cost and weight figures for trusses of spans considered by the author at spacings varying between 12 ft. 6 in. and 20 ft. in increments of 2 ft. 6 in. The cost is expressed in the form of equivalent units and for this purpose I have assumed that the relationship between the prices of individual components of the building is as shown below.

THE PRESIDENT proposed a vote of thanks to the Authors for the skill with which they had put together the information presented in the paper and the clarity of the photographs and drawings and descriptions they had given.

In a previous paper' we have pointed out the desirability of being able to calculate the critical load of building frames. This paper shows how the sway critical load of any symmetrical single bay frame may be obtained. It also gives the results of numerical calculations for a particular case and an extension to many bay frames. W. Merchant