Door locks and hardware

Question 1

latchset:

Answer 1

hold door in place, not lock.

beveled latch, automatically engages the strike mount in frame.

Question 2

lock or latch type:
set in rectangular area cut out of door.
most secure.

Answer 2

mortise

Question 3

lock or latch. aka unit locks.
slid into notch made in edge of door,
req little adjustment.
found in older buildings.

Answer 3

pre assembled:

Question 4

lock or latch.
aka cylindrical.
holes thru face and edge.

pro: easy install, less expensive than mortise.
con: fewer operating functions.

typ residential and small commercial.

Answer 4

bored

Question 5

lock.
cylindrical lock and deadbolt.
single action on inside releases both bolts.

Answer 5

interconnected

Question 6

typ required for ADA.

Answer 6

lever

Question 7

backset:

Answer 7

distance from edge of door

to centerline of knob/lever.

typ 2 ¾” and 5”.

Question 8

alt way to hang doors,

where appearance of hinges not desired,

Answer 8

pivots

also @ frameless design where hinges are impossible.

Question 9

swing either direction,
can be completely concealed,
but only 90º swing.

Answer 9

center-hung pivots

Question 10

panic hardware:

these extend width of door

Answer 10

push bars

Question 11

panic hardware:

vertical rods disengage latches

Answer 11

top and bottom.

Question 12

panic hardware:

vertical rod mounting

Answer 12

surface mounted or concealed

Question 13

push plates + pull bars are used for:

Answer 13

operate door w/o automatic latching.

doors to toilet rooms/commercial kitchens.

Question 14

control distance a door can be opened.

protect the door and surrounding construction from damage.

surface mounted or concealed, both at frame or door.

Answer 14

closers

Question 15

available integral with pivots, or fire/smoke detectors

Answer 15

closers

Question 16

seal vertical crack between double doors,
can act as door stop,
or provide extra security when closed.
may be fixed or removable.

Answer 16

astragal

Question 17

used w double doors,
which are rabbeted, or have an astragal on the active leaf.
ex. prevents leaf w astragal from closing first,
preventing full close.

Answer 17

coordinators

Question 18

used on inactive leaf.
mortised or surface mounted.
active leaf closes to locked inactive leaf.
not allowed on exit doors.

Answer 18

flush bolts

Question 19

mortised or surface mounted,
to bottom of door.
provide a sound or light seal.
door open = seal up.
door closed = plunger strikes jamb and forces seal down.

Answer 19

automatic door bottoms

Question 20

edges/bottoms provide tight seal,
against water/air penetration.
also light and sound protection,
and against smoke at fire doors.
materials: neoprene, fetl, metal, vinyl.

Answer 20

weatherstripping:

Question 21

thresholds: used at

Answer 21

floor materials change at door line,
where weather stripping is req’d,
where a hard surface is req’d for an automatic door bottom,
minor changes in floor level occur.

Question 22

req hinge material at fire doors

Answer 22

steel or stainless steel

Question 23

req hinge material at corrosive environments

Answer 23

stainless steel or bronze

Question 24

finishes standardized by two groups

Answer 24

US Designations
(federal govt)

BHMA (builders hardware manufacturers association)

Question 25

finishes designations range from lowest brass to highest stainless steel, numbered:

Answer 25

605/US3
to
630/US32.