BDC - Windows & Openings Flashcards
what is a flush and sash doors?
flush: smooth flat door\
Sash: with glazing
what are standared HM door sizes?
2’0”, 2’4”, 2’6”, 2’8”, 3’, 3’4”, 3’6”, 3’8” & 4’
what are th 4 basic types of hinges?
FULL MORTISE:Typ hinge, both leafs are recessed in the frame
HALF MORTISE: one leaf is mounted on the surface of the door the other recessed.
FULL SURFACE:the entire hinge is surface mounted.
HALF SURFACE:
how are hinges sized?
x # where the 1st number length of the barrel of the hinge and the second is the width
where are ball bearing hinges req’d?
rated assemblies and doors w/ closers
what are the 4 types latches & locks?
MORTISE: bored out, typ in commercial construction
PRE-ASSEMBLED:
BORED: (seen in typ interior residential construction)
INTERCONNECTED:
in door locks what is the back set?
its the distance from the end of the door to the CL of the lock, typ 2 3/4”
in corrosive environments what must the door hardware be made out of?
Stainless STeel or bronze
when is panic hardware req’d?
certain occupancies (ie education and assembly) w/ an occupant load over 50.
what is the mounting height of door hardware/.
34” to 48”
what is the fire rating of wire glass?
45min
are fire doors req’d to be self latching?
yes
a fire door is req’d to be self closing?
yes, or a hold open thats attached to a fire alarm system.
what is float glass?
the most common. Made by pouring molten glass onto a bed of molten tin & allowing it to slowly cool. Also called annealed glass
what is heat strengthened glass?
This glass is produced by heating glass to 1100 deg and slowlu cooling it.
