Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

90 MOLESWORTH’S POCKET-BOOK TO DETERMINE THE STABILITY OK EETAININÜ ■WALLS BY DIAGRAM. Let E, F, G, H be the section of the retaining wall. „ Ob the line of the centre of pressure with any convenient scale lay off (from the vertical line oi the centre of gravity of the wall) AB equal to the pressure tending to overturn the wall; and on the vertical line of the centre of gravity of the wall at its intersection with the centre ot pressure lay off with the same scale A C - to the weight of the wall; complete the parallelogram, and draw the diagonal AD; if the diagonal or its prolongation fall inside the outer edge E the wall is stable.