PIERHEADS, QUAYS, AND LANDING-STAGES.
219
When a pontoon supports three or more concentrated loads, the conditions
become identical with what is known as the case of the continuous beam, but,
in this instance, one of the chief obstacles to a ready determination of .the
Connecting stage with Quay.
ni ii 11111 'n li 1111'1 a i i i ii i iïriiiii i iiii 11'1 ii 'n ii j iii i i 'nI
Elevation.
Part Plan.
10 s 0 70 20 30 40 50 60 70 60 30 100
-LiJuuJ ------I ___I ____I_____I ____I I < I I I
Scale of feet.
Figs. 199, 200. —Liverpool Floating Landing-stage.
a0 0
problem is removed, iu that tiie exact amount and dispositions of all the
external forces is known.
Such being the conditions, it is unnecessary to pursue the matter further,
as it simply resolves itself into an application of the ordinary principles of
mechanics to structural stresses in general, and lies, therefore, outside the
special province of this volume.