That where long runs are installed in more than
one piece, miter cuts and lap splices are used.
That where curved bends are needed, the trim is
kerfed on the back so that the cuts are invisible from the
front and are close enough together to create a smooth,
uniform curve without kinks.
That all trim is nailed securely and that the nails
or brads are suitable to avoid splitting.
That finishing nails are set adequately, but not so
deeply as to pull through the wood.
That all joints and visible seams are sealed with
wood filler and that all trim is suitably primed and field
An inspection of structures should include both
exterior and interior doors. The following sections
provide information on some of the different types of
doors used at Navy activities. Items that should be
checked in an inspection of specific types of doors also
are pointed out.
Exterior doors are constructed mainly of solid
wood, fiber glass, sheet metal, aluminum, or structural
glass. Wood doors may be of hardwood or softwood.
Metal doors may be of a metal-faced frame with an
insulated foam core.
Hinged doors are used for most personnel
entrances. They may be single-leaf or double-leaf.
Two or more pairs of double-leaf doors maybe used for
main entrances. Hinged doors may be of solid wood,
metal-faced, filled-panel, or rolled-metal construction.
They vary in style from simple stock patterns to highly
ornamental designs in bronze, aluminum, Monel Metal,
or stainless steel. Hinged doors may have exposed or
concealed hinges mounted on the jamb or top and
bottom set in the head and threshold. Most screen doors
are the hinged type.
You must be sure that hinged doors are of the
material, grade, size, type, and design specified and
conform to the specifications. Usually, doors will have
been factory-inspected. You must determine that they
are accurately fitted to the frames with minimum
clearance at head, jambs, and sill; that they are
weather-stripped, glazed, and fitted with hardware, as
specified; and that they are painted, varnished, or
otherwise finished as required.
Large openings may be closed by horizontal sliding
or rolling doors, usually suspended by hangers from
rollers that travel on horizontal or slightly inclined
tracks and guided by troughs, grooves, or similar
devices at the bottom. These doors vary from simple
barn doors to the massive, steel-framed doors used for
airplane hangars. Doors of this type of large size usually
run on wheels mounted in the bottom chord and travel
on rails set at grade.
When horizontal sliding or rolling doors are
inspected, you must be sure that the doors are plane and
free from wind, and that the doors are mounted so that
adequate operating clearance is obtained, but that
suitable weathertight closure is also obtained when they
are closed. You must also make certain that tracks,
rollers, roller suspensions, and operators are accurately
aligned and adjusted for smooth operation.
Large shop and storehouse openings are frequently
closed by steel rolling doors. These doors consist of a
large number of interlocking horizontal slats that can be
rolled up on a drum mounted above the head of the door
opening. The slats are held loosely in channel guides at
the jambs. The doors are counterbalanced by a spring
tension device for ease of movement and may be
operated either by motor or by hand.
In an inspection of steel rolling doors, you must
ensure the following:
That the slats are true and undamaged and
interlock with adjacent slats, as intended, and that the
slat assembly is mounted truly on the roller or drum and
is correctly fastened so that the slats roll up smoothly
and evenly, maintaining their horizontal position.
That slat ends are provided with guide castings,
as specified or approved, and that these guide castings
fit accurately into the side guides with sufficient depth
of bearing to assure against their pulling out and with
sufficient clearance to assure easy operation.
That the spring counterbalance or other
balancing device is tensioned for the required ratio of
the total load and maintains satisfactory tension
throughout the operating range.
That operating machinery is suitably aligned and
adjusted, and that all accessories specified are provided