Presentation on theme: "DESIGNING WITH CURTAINWALL AND STOREFRONT This program is registered with the AIA/CES for continuing professional education. As such, it does not include."— Presentation transcript:
DESIGNING WITH CURTAINWALL AND STOREFRONT
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!
LEARNING OBJECTIVES: Definitions of Curtain Wall and Storefront Curtain Wall and Storefront applications Curtain Wall and Storefront profiles and dimensions Installation of Curtain Wall and Storefront Product Selection for your application
Curtain Wall: A “non-load bearing” exterior glazing system used to create the exterior skin of a building
Storefront: Aluminum and glass framing system typically used at ground floor locations of commercial buildings
CURTAIN WALL VS. STOREFRONT Curtain Wall Multi-span locations Multi-span locations Higher design pressures Higher design pressures Greater than 10’ high Greater than 10’ high Custom design features Custom design featuresStorefront Single Span Single Span Typically less than 10’ tall Typically less than 10’ tall Economical Economical Narrower site-lines Narrower site-lines Narrower system depth Narrower system depth
CURTAINWALL & STOREFRONT Typically erected and glazed on-site (Stick-built) Curtain Wall can be unitized and field erected
CURTAINWALL AND STOREFRONT COMPONENTS Profiles and depths will vary, but component names are fairly similar Some of the terminology……..
Head: The horizontal frame member which forms the top of a frame Head
Sill: The bottom horizontal in the framing system Sill
Jamb: The vertical frame member forming the side of an opening, or the side of a door Jamb
Mullion: A vertical framing member separating fixed lights of glass Mullion
Intermediate Horizontal: The horizontal member used between two lites of glass IntermediateHorizontal
Pressure Plate: An exterior extrusion that is mechanically fastened to hold the glass in place in CURTAINWALL applications PressurePlate
Cover: The finished snap on piece at the exterior of the building applied to the pressure plate Cover Cover Pressure Bar
Screw Splines: Anchoring method in which screws are used in splines to assemble the framing Screw Splines
Shear Blocks: Anchoring system utilizing an aluminum block to secure horizontals to the verticals ShearBlocks
Steel Reinforcement: Steel channel or tube needed to stabilize the mullion in certain conditions- can be used with curtainwall OR storefront SteelReinforcement
STOREFRONT SYSTEMS STOREFRONT SYSTEMS These are erected and glazed on-site (Stick-built) Can also be shop-fabricated and site- erected DEFINITIONS AND DIMENSIONS:
Storefront Product Selection- Typical System Dimensions 1-3/4” x 4-1/2” Non-thermal 1-3/4” x 4-1/2” Non-thermal 2” x 4-1/2” Non-Thermal & Thermal 2” x 4-1/2” Non-Thermal & Thermal Center Glazed vs. Front Set Center Glazed vs. Front Set
STOREFRONT: CENTER GLAZED
STOREFRONT: Front Glazed System
STOREFRONT: Water Deflectors: Used where the horizontal and vertical meet, it keeps water away from the top edge of the glass below WaterDeflectors
STOREFRONT: Subsill: An outlet for water that is used at the sill of a storefront frame Sill/Subsill
STOREFRONT: End Dams: Used in the subsill to keep water from penetrating the interior side of the frame EndDam Apply sealant at joint of flashing and end dam as shown
STOREFRONT: Weep Holes: A hole in the system that allows water to drain WeepHole Weep Holes (2 req’d per lite)
STOREFRONT: Install Individual Units Individually Assembled Units Snap front edge in place, then rotate the frame to snap rear of frame in place
CURTAINWALL: VARIATIONS ON A THEME SSG – Structural Silicone Glazed Inside Set Stick Built vs Unitized
CURTAIN WALL STICK BUILT VS. UNITIZED Stick Built Metal is field assembled (fabricated) from extrusion “sticks” Metal is field assembled (fabricated) from extrusion “sticks” Glass is installed after metal installation Glass is installed after metal installation Conventional installation method Conventional installation methodUnitized All fabrication (metal & glass) is done in the shop All fabrication (metal & glass) is done in the shop Decreases field labor costs Decreases field labor costs Increase shop labor and equipment costs Increase shop labor and equipment costs Able to offer shorter installation time frame Able to offer shorter installation time frame
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.
Unitized Curtain Wall: A factory glazed system installed in large units
SSG (Structural Silicone Glazed) Mullions: Mullions that are specifically for “butt glazing” or structural silicone glazing
SSG System: Used to achieve the appearance of a seamless system vertically on the outside Top View
Inside Glazed System: Typically used to eliminate working on the exterior side of the building Top View
Inside Glazed Horizontal: Typically used to eliminate working on the exterior side of the building IntermediateHorizontal GlassStop
Inside Glazed Mullion: A mullion that does not utilize a pressure plate at the verticals but only at the horizontals IntermediateHorizontal GlassStop
WATER & WIND ISSUES A quality installation is critical! This includes anchorage AND proper sealing of the system Water will, at some point penetrate the exterior of these systems…. These systems are designed to manage water that may enter the system
Rain Screen: The exposed outer skin or surface element of the wall, backed by an air space, designed to shield the joints from water Rain Screen Air Space
Pressure Equalization: The method of equalizing the air pressure within a cavity with the pressure outside the cavity CriticalSeal “Wet”Area Moisture 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. Snap Cap Weep Holes (As long as this seal is kept intact, pressure equalization is maintained.)
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 permeate CriticalSeal “Wet”Area Built up moisture in the wet area drains through the weep holes and out of the system. Snap Cap Proper Drainage
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 percolate Seal in this area degrades and weeping occurs, thus moisture in the internal area of the horizontal Built 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. Improper Drainage Blockage
Weep Holes: A hole in the system that allows water to drain WeepHole Weep Holes (2 required per lite)
Joint Plugs: Used to keep water from running down the vertical glass pocket Joint Plugs
Mullion Caps: Used at the top and bottom of the mullion to insure a continuous perimeter bead of sealant Head Sill
Deflection: The amount of inward or outward movement on the assembly when wind pressure is applied Normal Condition No occurrence of Deflection, stresses are distributed equally around frame. Deflection Condition Deflection produces stress at the anchored points, in this case in the corners of the frame. Stress is produced at the anchor points OutsideForce
Wind Load Anchor: Allows for movement due to expansion or contraction and live load deflection of the floor slabs NylatronPad Steel Angle Drill holes after alignment has been completed.
Dead Load Anchor: Typically used at the floor slabs designed to maintain a rigid connection of the vertical member to the building construction NylatronPad Steel Angle Drill holes after alignment has been completed.
“F” Anchor: Used at the top and bottom of the Jambs to anchor the member. “F” Anchors “T” Anchors
Install Anchor Bolts at Sill and Head locations Install Anchor Bolts at “T” and “F” Anchor locations.
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 anchor ConcreteSlab EmbeddedAnchor
Install a stop screw in the lower vertical Position upper portion of Vertical Splice over the lower portion Remove tape to allow the Splice Insert to drop to stop screw... Vertical Splice: Used in applications where vertical thermal expansion is required (typically over 20’ spans) Insert a set screw into the mullion to hold the two members together
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. Vertical Splice: Used in applications where vertical thermal expansion is required (Continued)
Curtainwall Product Selection- Typical Product Dimensions 2-1/2” x 6” 2-1/2” x 6” 2-1/2” x 7-1/2” 2-1/2” x 7-1/2” SSG (6” and 7-1/2”) SSG (6” and 7-1/2”) 2-1/2” x 10” 2-1/2” x 10”
SUMMARY Curtain Wall is a flexible system designed to accommodate the vision of the Design Professional Curtain Wall is designed for use in multi-span applications Storefront is also a flexible system, but has limitations due to the nature of it’s design Be sure to choose the appropriate system for your application If you have questions, PLEASE CALL!
Congratulations!!! You have survived Curtainwall/Storefront 101