Architect's Guide for Detailing & Specifying Access Floor Air Plenums
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Access Floors Architect’s Guide for Detailing & Specifying Access Floor Air Plenums

Access floor air plenum integrity begins with proper design and specification.

Architect’s Guide for Detailing & Specifying Access Floor Air Plenums Plenum Integrity is one of the most important aspects of designing, constructing and maintaining an underfloor air delivery (UFAD) system. It is vital that the entire design and construction team does their part to ensure the underfloor plenum is sealed properly. This process starts with the architect. As the architect designing a building with a UFAD system you have the responsibility of providing specifications and details for constructing a plenum with proper sealing and integrity. Every contractor working in the...

Downloadable Specifications & Details Visit Tate’s website to download the sealing details and recommended specification language in this guide. The details are available in AutoCAD dwg and PDF file formats. In addition a Microsoft word version of the specifications in this guide can be found in the architectural details under the Product & Spec section of the website www.tatetasman.com.au CSI Specifications for Consideration The following is Tate’s recommended access floor air plenum sealing specification language to insert into the CSI specifications for subcontractors. All of the...

Quality Control: All walls passing through the access floor must have gypsum board extending completely to the slab and be sealed at the slab line. All penetrations into cavity walls and slabs for air ducts, plumbing pipes, electrical conduit and voice/data cabling must be completely sealed. All seams and/or holes that have been created for or resulting from the work performed by a specific trade should be properly sealed by that trade and whenever possible performed prior to the installation of the access floor. Quality Control: Special inspections must be conducted by an independent...

DIVISION 03 - CONCRETE SPECIFICATION - Cast in Place Concrete The concrete contractor is aware that the space beneath the access floor will be used as an air delivery plenum and as such will take the necessary precautions when installing their work so as not to impact the integrity of the plenum space specific to air leakage and cleanliness. Any penetrations or holes in the underfloor plenum resulting from the work performed by the division 3 contractors not intended for service utility distribution are required to be properly sealed to prevent air leakage. DIVISION 05 - METAL STAIRS...

DIVISION 14 - CONVEYING EQUIPMENT SPECIFICATION The conveying equipment contractor is aware that the space beneath the access floor will be used as an air delivery plenum and as such will take the necessary precautions when installing their work so as not to impact the integrity of the plenum space specific to air leakage and cleanliness. Any penetrations or holes in the underfloor plenum created for or resulting from the work performed by the division 14 contractors are required to be properly sealed to prevent air leakage. DIVISION 22 - PLUMBING SPECIFICATION The plumbing contractor is...

Construction Details for Consideration The following are typical sealing details that should be considered to ensure UFAD plenum integrity. All of the details can be downloaded on-line at: www.tatetasman.com.au Underfloor Air Sealing Locations PLAN VIEW WITHOUT ACCESS FLOOR DETAIL G TELCOM ELECTRICAL

ELECTRICAL TELCOM

Base Building Core & Shell Sealing Details A) PERIMETER SEAM ALONG SLAB AND EXTERIOR WALL INTERIOR WALL ASSEMBLY CURTAIN WALL SEAL AT SLAB LINE CONCRETE DECK B) ENCLOSED COLUMN SEAM AT SLAB LINE STRUCTURAL COLUMN SEAL AT SLAB LINE CONCRETE DECK C) DRYWALL PARTITION CONDITION SEAL AT SLAB LINE CONCRETE DECK

D) BASE OF STAIRS ON BUILDING SLAB STAIR TREAD (TYP) SEAL SEAM BETWEEN STAIR AND CURB OR OTHER SUPPORT SEAL AT SLAB LINE CONCRETE DECK CONCRETE CURB OR STRUCTURAL STEEL WITH FULL ENCLOSURE E) TOP OF STAIR INTERFACE WITH CONCRETE DECK CONCRETE CURB OR STRUCTURAL STEEL WITH FULL ENCLOSURE SEAL AT SLAB LINE CONCRETE DECK F) ELEVATOR SHAFT BELOW ACCESS FLOOR LINE TOP OF STAIR INTERFACE WITH CONCRETE DECK ELEVATOR DOORS ELEVATOR THRESHOLD CONCRETE CURB OR STRUCTURAL STEEL WITH FULL ENCLOSURE CONCRETE DECK SEAL AROUND FULL ENCLOSURE

G) EXPANSION JOINT IN CONCRETE DECK EXPANSION JOINT CONCRETE DECK SEAL JOINT EXPANSION JOINT IN CONCRETE DECK HVAC System Sealing Details H) OPENING IN SLAB FOR VERTICAL DUCTS VERTICAL DUCT SEAL SPACE AROUND DUCT CONCRETE DECK I) OPENING IN PLENUM WALLS FOR DUCTS CONCRETE DECK DUCT THROUGH WALL SEAL SPACE AROUND DUCT

Plumbing Sealing Details J) PIPE PENETRATION THROUGH CONCRETE DECK SEAL AROUND PIPE CONCRETE DECK PIPE PENETRATION THROUGH CONCRETE DECK K) PIPE PENETRATION THROUGH PLENUM WALLS SEAL AROUND PIPE WALL ASSEMBLY CONCRETE DECK

Electrical System Sealing Details l) CONDUIT THROUGH PLENUM WALLS CONDUIT (AND CABLE BUNDLE) O.D. SEAL AROUND CONDUIT WALL ASSEMBLY CONDUIT CONCRETE DECK M) OPEN ENDS OF CONDUIT IN THE PLENUM SPACE WALL CONDUIT THROUGH PLENUM WALL ASSEMBLY CONDUIT SEAL OPENING AT CONDUIT PENETRATION SEAL OPEN END OF CONDUIT IN PLENUM CONCRETE DECK WALL ASSEMBLY CONDUIT SEAL OPENING AT CONDUIT PENETRATION SEAL OPEN END OF CONDUIT IN PLENUM CONCRETE DECK

Voice/Data System Sealing Details N) CABLE PENETRATIONS THROUGH PLENUM WALL WITH CABLE SLEEVE SEAL AROUND CABLE SLEEVE SEAL AROUND CABLES INSIDE SLEEVE WALL ASSEMBLY CAPPED ENDS OF UNUSED CABLE SLEEVE (TYP) CONCRETE DECK CABLE BUNDLE CABLE PENETRATIONS THROUGH PLENUM WALL WITH CABLE SLEEVES

Access Floor Air Sealing Locations PLAN VIEW WITH ACCESS FLOOR INSTALLED 6” RAISED PODIUM DETAIL 8

Access Floor Sealing Details 1) PLENUM DIVIDERS PANEL FASTENED TO PEDESTAL HEAD WITH COMBO CORNERLOCK SCREW ACCESS FLOOR PANEL FIELD APPLIED GASKET ATTACH PLENUM CHANNEL WITH STRINGER SCREWS TAPE JOINTS WITH METAL FOIL TAPE 2.4m LONG GALVANIZED STEEL HAT CHANNEL FASTEN WITH TEK SCREWS 26 GA. X 1.8m STEEL BOTTOM ANGLE CUT AS REQUIRED SO THAT IT DOES NOT EXTEND ABOVE HAT CHANNEL FIELD APPLIED TATE PLENUM GASKET P/N 10626 TAPE JOINTS WITH METAL FOIL TAPE WHERE BOTTOM ANGLE SECTIONS MEET AND WHERE HAT CHANNEL SECTIONS MEET TAPE JOINTS WITH METAL FOIL TAPE WHERE HAT CHANNEL AND BOTTOM ANGLE MEET...