glass and glazing ✅

silica

glass is a hard, brittle, chemically inert substance produced by using _________ together with flux and a stabilizer into a mass that cools to a rigid condition without crystallization

sheet glass

fabricated by DRAWING the molten glass from a furnace, or by forming a cylinder, dividing it lengthwise, and flattening it. may reult in a distorted vision

plate glass

formed by ROLLING molten glass into a plate that is subsequently ground and polished after cooling. provides clear, undistorted view

float glass

manufactured by POURING molten glass onto a surface of molten tin allowing it to cool slowly. used in tempered glass

annealed glass

COOLED SLOWLY to relieve internal stresses

heat strengthened glass

annealed glass that is partially tempered by a process of REHEATING AND SUDDEN COOLING. has twice the strength of annealed glass of the same thknss

tempered glass

annealed glass that is reheated to just below the softening point and then rapidly cooled to induce compressive stresses un the surface and edges of the glass and tensile stresses in the interior

tempered glass

aka heat strengthened glass. has 3-5 times the resistance of annealed glass but cannot be altered after fabrication. breaks into relatively harmless pebble sized particles

laminated or safety glass

consist of two or more piles of flat glass bounded under heat and pressure to inter layers of polyninyl butyral resin that retains the fragments if the glass is broken.

security glass

laminated glass that has exceptional tensile and impact strength

wired glass

flat or patterned glass havibg a square or diamond wire mesh embedded within it to prevent shattering in the event of breakage or excessive heat. considered a safety glazing material and may be used to glaze fire doors and windows

patterned glass

has linear or geometric urface pattern formed in the rolling process to obscure vision or to diffuse light

obscure glass

has one or both sides acid etched or sandblasted to obscure vision. process either weakens or makes glass difficult to clean

spandrel glass

opaque glass foe concealing tje structural elements in curtain wall construction, produced by fusibg a ceramic frit to the interior surface of tempered glass. like graphicote but place un exterior

insulating glass

glass unit consisting of two or more sheets of glass separated by a sealed air space to provide thermal insulation and restrict condensation; have a 3/16" airspace to trap heat

tinted or heat absorbing glass

has a chemical admixture to absorb a portion of the radiant heat and visible light that strike it. iron oxide gives the glass a pale blue green tint; cobalt oxude abd nuckel impart a graying tint; selenium a bronze tint

reflective glass

has a thin, translucent metallic coating to reflect a portion of the light and radiant heat that strike it. the coating may be applied o one surface of singke glazing in bet the piles of laminated glass, or to tje exterior or interior surfaces of insulating glass

low emissivity glass

low-e transmits visible light while selectively reflecting the longer wavelengths of radiant heat, produced by depositing a low e coaring either in the glass itself or over a transparent plastic film suspended in the sealed air space of insulating glass

photochromic

smart glass that changed color properties when sunlight (photon) hits th durface of the glass

thermochromic

smart glass that changes its color when the surface reaches the prescribed temperature

electrochromic

smart glass that regulates color by a dc power applied to the layer sandwiched between twonpanes of glass. controlling its opacity

glazing

the process or stage of installibg glass into a building

face glazing

detting of a glass psne in a rabbeted frame holding it in place with glazier's points, and sealing it with a beveled bead of putty

putty

compound of whiting and linseed oil, of dough like consistency when fresh, used in securing windowpanes or patching woodwork defects

doubl glazing

the installation of two parallel panes of glass with a sealed air space between to reduce the transmission of heat and sound

wet glazing

the setting of glass in a window frame with glazing tape or a liquid sealant (silicone sealant)

glazing bead

a wood molding ir metal section secured against the edge of a glass pane or unit to hold it in place. aka glazing stoo

dry glazing

setting of glass in a window frame with a compression gasket instead of glazing tape or a liquid sealant

compression gasket

preformed strip of synthetic rubber or plastic compressed between a glass pane or unit and a window frame to form a water tight seal and cushion for the glass

flush glass

a glazing system in which the framing members are set entirely behind the glass panes or units to form a flush exterior surface, the glass adhering to the framing with a structural silicone sealant

glass mullion system

glazing system in which sheets of tempered glass are suspended from special clamps, stabilized by perpendicular stiffeners of tempered glass, joined by a structural silicone sealant and sometimes by metal patch plates