2 READ INFORMATION FROM SLIDE This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or ay method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.Thank you!READ INFORMATION FROM SLIDE
3 LEARNING OBJECTIVES: Definitions of Curtain Wall and Storefront Curtain Wall and Storefront applicationsCurtain Wall and Storefront profiles and dimensionsInstallation of Curtain Wall and StorefrontProduct Selection for your application
4 Curtain Wall: A “non-load bearing” exterior glazing system used to create the exterior skin of a building
5 Storefront: Aluminum and glass framing system typically used at ground floor locations of commercial buildings
6 CURTAIN WALL VS. STOREFRONT Multi-span locationsHigher design pressuresGreater than 10’ highCustom design featuresStorefrontSingle SpanTypically less than 10’ tallEconomicalNarrower site-linesNarrower system depth
7 CURTAINWALL & STOREFRONT Typically erected and glazed on-site (Stick-built)Curtain Wall can be unitized and field erected
8 CURTAINWALL AND STOREFRONT COMPONENTS Profiles and depths will vary, but component names are fairly similarSome of the terminology……..
9 Head: The horizontal frame member which forms the top of a frame
10 Sill: The bottom horizontal in the framing system
11 Jamb: The vertical frame member forming the side of an opening, or the side of a door
12 Mullion: A vertical framing member separating fixed lights of glass
13 Intermediate Horizontal: The horizontal member used between two lites of glass
14 Pressure Plate: An exterior extrusion that is mechanically fastened to hold the glass in place in CURTAINWALL applicationsPressurePlate
15 Cover: The finished snap on piece at the exterior of the building applied to the pressure plate Pressure BarCoverCover
16 Screw Splines: Anchoring method in which screws are used in splines to assemble the framing
17 Shear Blocks: Anchoring system utilizing an aluminum block to secure horizontals to the verticals
18 Steel Reinforcement: Steel channel or tube needed to stabilize the mullion in certain conditions- can be used with curtainwall OR storefrontSteelReinforcement
19 STOREFRONT SYSTEMS These are erected and glazed on-site (Stick-built) Can also be shop-fabricated and site-erectedDEFINITIONS AND DIMENSIONS:
20 Storefront Product Selection- Typical System Dimensions 1-3/4” x 4-1/2” Non-thermal2” x 4-1/2” Non-Thermal & ThermalCenter Glazed vs. Front Set
23 STOREFRONT: Water Deflectors: Used where the horizontal and vertical meet, it keeps water away from the top edge of the glass belowWaterDeflectors
24 STOREFRONT: Subsill: An outlet for water that is used at the sill of a storefront frame Sill/Subsill
25 STOREFRONT: End Dams: Used in the subsill to keep water from penetrating the interior side of the frameEndDamApply sealant at joint of flashing and end dam as shown
26 STOREFRONT: Weep Holes: A hole in the system that allows water to drain (2 req’d per lite)WeepHole
27 STOREFRONT: Install Individual Units Snap front edge in place, then rotate the frame to snap rear of frame in placeIndividually Assembled Units
28 CURTAINWALL: VARIATIONS ON A THEME SSG – Structural Silicone GlazedInside SetStick Built vs Unitized
29 CURTAIN WALL STICK BUILT VS. UNITIZED Metal is field assembled (fabricated) from extrusion “sticks”Glass is installed after metal installationConventional installation methodUnitizedAll fabrication (metal & glass) is done in the shopDecreases field labor costsIncrease shop labor and equipment costsAble to offer shorter installation time frame
30 Conventional Curtain Wall: A stick built system utilizing pressure plates 1. Assemble Jambs, Mullions and Horizontals.2. Set the Glass.3. Install the Pressure Plates.
31 Unitized Curtain Wall: A factory glazed system installed in large units
32 SSG (Structural Silicone Glazed) Mullions: Mullions that are specifically for “butt glazing” or structural silicone glazing
33 SSG System: Used to achieve the appearance of a seamless system vertically on the outside Top View
34 Inside Glazed System: Typically used to eliminate working on the exterior side of the building Top View
35 Inside Glazed Horizontal: Typically used to eliminate working on the exterior side of the building IntermediateHorizontalGlassStop
36 Inside Glazed Mullion: A mullion that does not utilize a pressure plate at the verticals but only at the horizontalsIntermediateHorizontalGlassStop
37 WATER & WIND ISSUESA quality installation is critical! This includes anchorage AND proper sealing of the systemWater will, at some point penetrate the exterior of these systems….These systems are designed to manage water that may enter the system
38 Rain Screen: The exposed outer skin or surface element of the wall, backed by an air space, designed to shield the joints from waterRain ScreenAir Space
39 Pressure Equalization: The method of equalizing the air pressure within a cavity with the pressure outside the cavityCriticalSealMoisture which collects in the “Wet” Area can drain out through the weep holes. The “Wet” Area and the area behind the snap cap are all of the same pressure – thus pressure equalization.(As long as this seal is kept intact, pressure equalization is maintained.)Snap CapWeep Holes“Wet”Area
40 Water Control: The equal pressure and rain screen allows gravity to take the water out of the weep holes. If the chamber was not equal the water would permeateSnap CapCriticalSealProper DrainageBuilt up moisture in the wet area drains through the weep holes and out of the system.“Wet”Area
41 Water Control: The equal pressure and rain screen allows gravity to take the water out of the weep holes. If the chamber was not equal the water would percolateImproper DrainageBlockageBuilt up moisture in the wet area cannot drain through the weep holes, due to a blockage, and eventually can degrade the integrity of the critical seal and begin to percolate into the building.Seal in this area degrades and weeping occurs, thus moisture in the internal area of the horizontal
42 Weep Holes: A hole in the system that allows water to drain (2 requiredper lite)WeepHole
43 Joint Plugs: Used to keep water from running down the vertical glass pocket
44 Mullion Caps: Used at the top and bottom of the mullion to insure a continuous perimeter bead of sealantHeadSill
45 Deflection: The amount of inward or outward movement on the assembly when wind pressure is applied Stress is produced at the anchor pointsOutsideForceDeflection ConditionDeflection produces stress at the anchored points, in this case in the corners of the frame.Normal ConditionNo occurrence of Deflection, stresses are distributed equally around frame.
46 Wind Load Anchor: Allows for movement due to expansion or contraction and live load deflection of the floor slabsDrill holes after alignment has been completed.NylatronPadSteel Angle
47 Dead Load Anchor: Typically used at the floor slabs designed to maintain a rigid connection of the vertical member to the building constructionDrill holes after alignment has been completed.NylatronPadSteel Angle
48 “F” Anchor: Used at the top and bottom of the Jambs to anchor the member. “F” Anchors“T” Anchors
49 Install Anchor Bolts at Sill and Head locations Install Anchor Bolts at “T” and “F” Anchor locations.
50 Embed: An anchor typically used at the floor slabs that is preset in the concrete. The Curtain Wall can be welded or bolted to this anchorConcreteSlabEmbeddedAnchor
51 Vertical Splice: Used in applications where vertical thermal expansion is required (typically over 20’ spans)Install a stop screw in the lower vertical . . .. . . Position upper portion of Vertical Splice over the lower portion . . .Insert a set screw into the mullion to hold the two members together. . . Remove tape to allow the Splice Insert to drop to stop screw . . .
52 Vertical Splice: Used in applications where vertical thermal expansion is required (Continued) Move upper and lower unit together to form a ½” gap and seal with Bond Breaker tape. This tape should be applied in the shop before the splice unit is assembled.
53 Curtainwall Product Selection- Typical Product Dimensions 2-1/2” x 6”2-1/2” x 7-1/2”2-1/2” x 10”SSG (6” and 7-1/2”)
54 SUMMARYCurtain Wall is a flexible system designed to accommodate the vision of the Design ProfessionalCurtain Wall is designed for use in multi-span applicationsStorefront is also a flexible system, but has limitations due to the nature of it’s designBe sure to choose the appropriate system for your applicationIf you have questions, PLEASE CALL!