Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

175 OF ENGINEERING FORMULÆ. Strains osr Girders. • . ‘»See ‘ Min. Inst. Civ. Eng.,’ vol. xxiv. (C. Reilly.) I'he figures on the diagrams show the respective strains in terms of the load. The load distributed being taken as 100. The proportions adopted to give these strains are->- ' Depth of girder = of span. Angle of haw =? 45°. Girder divided into ten equal bays, each = JLgpan. Thick lines are in compression; thin lines in tension; In diagrams 1 and 3 the load is applied at the.tup; in 2 and 4 at. the bottom of the girder. The load is distributed evenly, but in cases of unequal loading the bars change tteir character and ttiains.