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Assembly of our products involves using UL Certified fiberglass board, which meets or exceeds NAIMA and SMACNA standards for fiberglass duct systems. Molded fiberglass vanes are used in all elbows and tees requiring turn vanes, and closure is accomplished using UL-181 certified heat-activated closure tape for fiberglass systems.
Duct grooving is mechanically accomplished using shiplap tooling for best construction, including stronger, truer corners. Shiplap tooling is also utilized for end connections of duct to ensure a proper fit.
All duct and fittings are made from 48" long overall duct modules. Default duct layout is configured for airflow direction from male shiplap end to female shiplap end per NAIMA specifications. Unless otherwise specified, all transitional fittings follow this pattern "From" male end "To" female end.
All duct and fittings are constructed grooved, assembled and taped. If necessary, ductwork can be made grooved only for easier transport and storage.
All fittings are constructed such that 8" tape straps on 12" centers are used where staple flaps can not be formed.
Where necessary, tie-rods and anti-sag supports using rigid conduit and volcano washers will be installed.
FDXXYY
FD = Fiberglass Duct : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
(Example: FD2008 = 20"x8"x48" Fiberglass Duct)
FHEXXYYTYPE
FHE = Fiberglass Horizontal 90° Elbow : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
TYPE = Elbow Type (TV = Throatless w/ Turnvanes : MOD = Sectional Module)
(Example: FHE2412TV = 24"x12" x48" Horiziontal 90° Elbow throatless With Turnvanes)
Standard Construction Is From A 48" Long Module With Turnvanes
FVEXXYYTYPE
FVE = Fiberglass Vertical 90° Elbow : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
TYPE = Elbow Type (TV = Throatless w/ Turnvanes : MOD = Sectional Module)
(Example: FVE2816TV = 28"x16" x48" Vertical 90° Elbow - Modular)
Standard Construction Is From A 48" Long Module With Turnvanes
FHAXXYYDEG
FVAXXYYDEG
FHE = Fiberglass Horizontal Elbow : FVE = Fiberglass Vertical Elbow
XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
DEG = Angle Degree Of Elbow
(Example: FVA281645 = 28"x16" x48" Vertical 45° Elbow)
Standard Construction Is From A 48" Long Module
FHTXXYYaabbQQRR
FVTXXYYaabbQQRR
FHT = Fiberglass Horizontal Tee : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
FVT = Fiberglass Vertical Tee : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
aa = Horizontal (Slip) Inner Dimension : bb = Vertical (Drive) Inner Dimension ---> BRANCH 1
QQ = Horizontal (Slip) Inner Dimension : RR = Vertical (Drive) Inner Dimension ---> BRANCH 2
(Example: FHT281016101210 = 28"x10" to 16"x10" to 12"x10" Horizontal Tee With TV)
Specify All Symmetry With Notes Where Necessary (i.e. Flat on Top)
Standard Construction Is With Turnvanes From A 48" Long Module
FTXXYYaabb
FT = Fiberglass Transition : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
aa = Horizontal (Slip) Inner Dimension : bb = Vertical (Drive) Inner Dimension ---> End 2
(Example: FT28162412 = 28"x16" x48" Transition to 24"x12")
Specify All Symmetry With Notes (i.e. Centerflare, Flat on Top, Etc.)
Standard Construction is Centerflare and Flat on Top
FOXXYY
FT = Fiberglass Transition : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
(Example: FO3612 = 36"x12" x48" Fiberglass Offset / Riser)
Specify All Symmetry With Notes (i.e. Amount of Set, Rise.)
Standard Construction is 30° Offset / Riser from 48" Long Module
Specify All Taps With Notes (i.e. Tap Type and location)
Standard Construction is 45° Inlet from 48" Long Module
FECXXYY
FEC = Fiberglass End Cap : XX = Horizontal (Slip) Inner Dimension : YY = Vertical (Drive) Inner Dimension
Standard Construction Is 1" Larger Both Dimensions To Slip Fit Into Female End of Module
Shade Tree Mfg. can also provide a variety of accessory items for your fiberglass projects. Rolls of heat activated tape, fiberglass flat stock, and hangars are but a few of the items that we keep in stock. Feel free to contat us with any specialized need you might have.