15 August 2002
Dock Water Level Indicators. Do not install ceramic tile water level
indicators at the same time a concrete wall is poured, but form the concrete to allow for
subsequent tile installation. Set individual tiles flush with the wall in a bed of mortar.
The gage zero usually coincides with the elevation of the dock floor level.
Marking Plates. Where marking plates already have centerlines, it is
practically impossible to set them accurately at the time concrete is placed. Therefore,
either form the concrete for subsequent plate installation or set plates in the pour and
stamp on the centerlines afterwards.
Fenders and Chafing Strips. Fenders, chafing strips, and other fittings
used for protective purposes (such as timber or metal guards around stairways,
floodlights, and similar items) are customarily furnished and installed by contractors.
Individual guard units should be preassembled, as completely as possible, and then
fastened by anchor bolts embedded in concrete. Because of exposed positions and
repeated submergency, treat all timber and coat all metal with corrosion resistant
MECHANICAL AND ELECTRICAL EQUIPMENT
Installation. Mechanical and electrical equipment for graving docks is
manufactured, and to a large extent assembled, at manufacturers' plants. Installation of
such equipment may be done under the direction of manufacturer superintendents,
general contractor, subcontractor, or yard forces. Installation of mechanical and
electrical equipment is generally in accordance with standard building practices. Only
those installation features peculiar to graving docks are considered below.
Capstans. Placement of heavy capstan machinery usually should be
done with truck or locomotive cranes. To maintain an even bearing, place a layer of
grout between machinery foundations and concrete bases containing the anchor bolts.
Pumping Machinery. Pumping machinery is usually installed by the
manufacturer. Because of the complexity of running performance tests on main pumps,
detailed tests are made at the factory. Usually, only one main pump is tested in
sufficient detail to obtain all necessary data for plotting suitable performance curves.
Shaft Alignment. It is extremely important to install pumps, pump
motors, connecting shafts, and shaft support bearings so the shafts are correctly
aligned with no unbalanced stresses imposed on the bearings.
Running Test. After installation, perform a thorough running test on the
entire pumping plant. Fire pumps should be tested in accordance with NFPA Standard
No. 20, Standard for the Installation of Stationary Fire Pumps for fire Protection.
Piping and Flow Control Equipment. Piping and flow control equipment
may be purchased, installed, and tested by a separate contractor under the general