idinj^he movement of the counterweight and is not subjected to any force theoretically. The 1 ft length of the pin is 10^-0^ which cannot be finally determined untilthe e.g. of the moving leaf has been calculated from the shop draw-ings . Art. 20. Center of Gravity of the Moving Leaf and End… … 33 iB accomplished by trials. A pieco of card board is cut to exactlythe shape of the portion of the moving girder in front of the maintrunnion. A point may be found within this portion of the cardboard8 0 that if a fine needle be pinned at that point the whole cardboardshall be in equilibrium at…
Movable bridges · Bridges · Theses
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