Chicago : Engineering and Contracting Pub. Co. · leaf 667
EngHContg. Fig. 2. boards must be used. In one method thebreast boards are held in place by planks putin vertically against them and held by jackscrews braced against the last set of timbers.This method is more or less cumbersome, as False Set … Fig. 3. arranged the false set is taken out, thus let-ting the lagging push in against the heel orbridge, holding the set firmly, in place. Allis now ready for the next drives, which arestarted between the cap and the bridge. In Bridge
Buildings
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