Construction material metal hardware

Metal Hardware
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Hardware
 Metal products used in construction, such as:
bolts, nails, screws (rough hardware);
fittings, such as latches, hinges, locks, etc.
(finish hardware); tools.
 Rough hardware : In building construction, hardware meant to
be concealed, such as bolts, nails, screws, spikes, and other
metal fittings
 Finish hardware : Hardware, such as hinges, locks, tower bolt,
latches, etc., that has a finished appearance as well as a
function, esp. that used with doors, windows, and cabinets; may
be considered part of the decorative treatment of a room or
building.

Hinges
 A movable joint used to attach, support, and turn a door (or
cover) about a pivot; consists of two plates joined together by a
pin which support the door and connect it to its frame, enabling
it to swing open or closed.
Types of hinges :
Double action hinge,
butterfly hinge,
butt hinge,
dovetail hinge,
gravity hinge,
H-hinge,
HL-hinge,
pintle hinge,
side hinge,
strap hinge.

Hinges
Double action hinge butterfly hinge
butt hingedovetail hinge
A decorative
hinge having the
appearance of a
butterfly.

Hinges
gravity hinge
H-hinge
HL-hinge
A hinge that closes
automatically as a
result of the weight
of a door to which it
is attached.
A type of H-
hinge that has a
horizontal extension
added to a foot of the
hinge.

Hinges
pintle hinge side hinge
strap hinge.
A hinge that pivots
about an upright pin
or bolt
A hinge fastened to
a door and the
adjacent wall by a
long hinge.

Hinges
Concealed hinge
Used for furniture doors
(with or without self-
closing feature, and with
or without damping
systems). They are
made of two parts: One
part is the hinge cup and
the arm, the other part is
the mounting plate.

Hinges
 Steel is a favorite for hinges of all types. It is relatively cheap,
strong, and durable. Its evolution from outcast to ordinary,
 There are many steel alloys, but one in particular bears notice
when it comes to hinges: stainless steel. This steel is
composed of at least 10.5 chromium, which reacts with oxygen
in the air to form a very thin film of chromium oxide on the
surface of the steel.
 The discovery of this corrosion-proof metal is generally credited
to Harry Brearley,

Hinges
 Both brass and bronze are alloys of copper, which is one of the
very first alloy humans were able to master.
 Brass, a mix of copper and zinc, was known to early
civilizations, but did not enjoy the popularity of its bronze cousin
largely because it was more difficult to produce. The Romans
used it to a limited extent in coins and jewelry, but brass was not
widely used until about the seventeenth century, when
European woolmakers used brass pins in weaving. Brass has
become even more popular since technology to reliably mass-
produce it was introduced in the nineteenth century

Tower bolt / barrel bolt
 A door bolt which moves in a cylindrical casing; not driven by a
key.

Latch
 A simple fastening device having a latch bolt, but not
a dead bolt; contains no provisions for locking with a key;
usually openable from both sides.
Spring latch

Thumb Latch
 Thumb latches are two-way latches and work as follows: on the
outside (street-side) of the gate is a decorative plate with a thumb
depressor. When you depress the thumb, a latch-arm on the
inside of the gate lifts and allows the gate to be opened. Closing
the gate, the latch-arm should hit the strike, rise up and fall into
the catch on its own (a gravity latch).
Thumb latches can be
installed only on in-swinging
gates and are always double-
sided. Some thumb latches are
lockable, some are not.

Thumb Latch
 A lift latch for securing a door in a closed position,
usually by means of a flat bar that falls into a catch when
pressed by the thumb; for example, see Norfolk
latch and Suffolk latch.
Norfolk latch A type of thumb
latch for a door that has a long
metal plate behind the latch to
protect the door finish; compare
with Suffolk latch.
Suffolk latch. A type of thumb
latch for doors; originally fabricated of
iron wrought by hand in England.
Attractive in appearance and available
in many different designs;

Bolt Latch
 some bolt latches might remind you of the old days, when you
tied a string to a latch, tossed it over the gate, and called it good.
Now there are a few spiffier versions of the old stand-by. We offer
a nice selection of architectural bolt latches Usually bolt latches
can be installed on either side of a gate. They are one way gate
latches, operable only from the one side (although a string can
get you access from the other side from the old style latch). Bolt
latches are sometimes lockable, sometimes not. The lockable
ones usually require an additional padlock.

Lever Latch
 Lever latches operate in the same way as a ring latch, but instead
of a ring on each side, there's a lever handle.
 Lever latches can be installed on both in-swinging and out-
swinging gates. On out-swinging gates, the latch-arm side will be
on the street-side of the gate. The best way to remember is that
the latch-arm of the gate latch must be installed on the side that
the gate opens toward.
 Lever latches can be either gravity-assisted or spring-loaded,
depending on the manufacturer. Some lever latches are lockable;
some are not.

Mortise Lock
 A lock designed to be installed in a mortise rather than on a
door's surface.

Hinges finishes
Finishes can also help hinges
look like metals which are
typically not suitable as a
base metal for hinges, such
as nickel. Nickel, a silvery
metal, is rarely used in pure
form. In fact, nickel was not
even discovered to be a
distinct element until 1751,
when Axel Fredrik
Cronstedt of Sweden
accidentally extracted pure
nickel, instead of copper,
from the mineral niccolite.

Finishes
 Brass versus brass plated. Many hardware items are made of pure brass.
Brass is a fairly soft metal, but it is weatherproof. It may be used inside or
outside the house. It has to be used with care around salt water, however,
because this can make it corrode. Brass plated is simply steel that has been
coated with brass. It is not weather proof.
 Bronze. This is also available in pure form, and as such is weatherproof. Items
made of it can be used inside or outside the house. It does not corrode; indeed,
it is often used in marine applications. Bronze is also a very strong metal.
 Bronze Plated. Like brass plated, this is steel that is coated with bronze.
Unlike pure bronze, however, it will not stand up to weather.
Bronze Plated
Brass plated

Finishes
 Galvanized. This is a special kind of finish applied to
steel items. The galvanizing may be hot-dipped or
coated-technically, electroplated. The hot dipped
galvanizing is far the superior of the two. Both are
weatherproof. Most outdoor items are galvanized.
Zinc or cadmium plated. These terms are really
synonymous. It is a wash coating that is given to
hardware that makes them rust resistant but not
rustproof. Galvanized items are far superior to ones with
zinc or cadmium finishes.
Zinc plated
cadmium plated

Finishes
 Blued. This is hardly a finish but just a treatment given to items to keep them
from rusting in the box while waiting to be sold.
 Japanned. This is a baked enamel finish, but only about as weather resistant
as items that are blued.
 Chrome plated. This is a highly polished finish used on cabinet hardware and
many plumbing items. It is highly resistant to corrosion and quite good-looking.
Japanned BluedChrome plated.

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