Glassware, reflectors, and diffusing louvers that
cannot be removed should be cleaned as follows:
Wipe with a moist cloth or sponge, using a solution
of synthetic detergent cleaner. When incrustation is not
removed by sponging, use No. 0 steel wool to remove
dirt film. Take care to ensure that shreds of steel wool
do not touch the pin contacts or get into the lamp socket.
Wipe off excess moisture with a clean cloth. Clean
fixture holders and stem hangers with a moist sponge or
cloth dampened with synthetic detergent cleaner and
wipe dry. Enameled, chrome, aluminum, or silver-
plated reflecting surfaces that cannot be adequately
cleaned and polished should be replaced.
Neglected lamp outages reduce illumination. If
burned-out lamps are not promptly replaced,
illumination may drop to unsafe foot-candle levels in a
short time because of outages alone. In some cases, it
may be satisfactory and more economical to clean lamp
surfaces and fixture interiors only at the time of
relamping. Each activity must determine whether
cleaning is to be accomplished by electrical, self-help,
or custodial service personnel.
Burned-out lamps are replaced on request. To
prevent reduced illumination from lamp outages, do the
following:
Instruct employees to report burnouts as they
occur.
Replace blackened or discolored lamps, even
though they are still burning. Discoloration indicates
the lamp is nearing the end of its useful life.
Replace fluorescent lamps as soon as they begin
to flicker. A burned-out lamp in a live circuit may cause
damage to starter and ballast. Blackening at the ends of
the tube adjacent to the base indicates that the lamp is
near the end of its useful life.
In general, replace with the same type, wattage,
and voltage as that of the lamp removed. If frequent
burnouts occur, the voltage rating of the lamps may be
too low. Lamps of higher wattage than called for on
lighting design plans should not be used.
SCAFFOLDING
As the working level of a structure rises above the
reach of crew members on the ground, temporary
elevated platforms, called SCAFFOLDING, are
erected to support the crew members, their tools, and
materials.
There are two types of scaffolding in use today:
wood and prefabricated. The wood types include the
swinging scaffold, which is supported on the ground.
For information concerning the wood type of
scaffolding, refer to Builder 3 & 2, volume 1,
NAVEDTRA 12520, chapter 4. The prefabricated type
is made of metal and is put together in sections as
needed. As a CE, you will be working more with the
prefabricated type of scaffolding.
This section provides only general information on
prefabricated scaffolding. For further details of
scaffolding, consult the latest copy of the Code of
Federal Regulations (29 CFR 1926).
PREFABRICATED SCAFFOLDING
Several types of patent-independent scaffolding are
available for simple and rapid erection, as shown in
figure 5-78. The scaffold uprights are braced with
Figure 5-78.—Assembling prefabricated independent-pole
scaffolding.
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