HVAC SHEET METAL FABRICATORS
COMMERCIAL & RESIDENTIAL

303.761.3058

Facebook  Twitter  LinkedIn  Email CHI


CHI Manufacturing


COMMITTED AND PROUD

USING
100% AMERICAN MADE METALS
IN C.H.I. PRODUCTS.

Scharrel Family
Owned & Operated
Since 1985



C.H.I. Manufacturing
the finest in
HVAC sheet metal
manufacturing & distribution.
Turning flat steel into the
products you need.

• KNOWLEDGE
• STANDARDS
• SOLUTIONS
• RELIABILITY
• QUALITY
• SERVICE
• SATISFACTION



C.H.I. Rectangular Ductwork
SMACNA Guidelines

Index - QuickFind Click On Selection Below

SMACNA 2005 1" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 2005 2" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 2005 3" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 2005 4" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 2005 6" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 2005 10" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 1" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 2" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 3" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 4" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 6" WG STATIC POSITIVE OR NEGATIVE Submittal
SMACNA 1995/1997 10" WG STATIC POSITIVE Submittal
BEADED DUCT Submittal
LONGITUDINAL SEAM Submittal
T.D.C. CONNECTOR Submittal
TRANSVERSE CONNECTORS Submittal
DUCT LINER INSTALLATION Submittal
BRANCH CONNECTIONS Submittal
SINGLE TURNING VANES Submittal
AIRFOIL TURNING VANES Submittal

 


1" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-12"
26
59"
FLAT SLIP
T-6 24 GA
FLAT DRIVE
T-1 24 GA
13"-18"
26
59"
STANDING SLIP
T-11 26 GA

FLAT DRIVE
T-1 24 GA

19"-30"
26
56"
T.D.C.
T-25a
T.D.C.
T-25a
31"-42"
24
56"
T.D.C.
T-25a
T.D.C.
T-25a
43"-54"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
55"-60"
24
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
61"-72"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
73"-84"
22
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
85"-96"
20
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
96"&UP
18
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


2" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-10"
26
59"
FLAT SLIP
T-6 24 GA
FLAT DRIVE
T-1 24 GA
11"-14"
26
59"
STANDING SLIP
T-11 26 GA

FLAT DRIVE
T-1 24 GA

15"-26"
26
56"
T.D.C.
T-25a
T.D.C.
T-25a
27"-30"
24
56"
T.D.C.
T-25a
T.D.C.
T-25a
31"-36"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
37"-42"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
43"-60"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
61"-72"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
85"-96"
20
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
97"&UP
18
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


3" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-12"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
13"-26"
24
56"
T.D.C.
T-25a

T.D.C.
T-25a

27"-30"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
31"-36"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
37"-42"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
43"-54"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
55"-60"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
61"-84"
20
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
85"-96"
18
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
97"-120"
18
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


4" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-10"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
11"-12"
26
59"
T.D.C.
T-25a

T.D.C.
T-25a

13"-22"
24
56"
T.D.C.
T-25a
T.D.C.
T-25a
23"-28"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
29"-42"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
43"-60"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
61"-72"
20
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
73"-96"
18
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
97"-120"
18
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


6" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-8"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
9"-12"
24
56"
T.D.C.
T-25a

T.D.C.
T-25a

13"-24"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
25"-26"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
27"-30"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
31"-36"
20
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
37"-60"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
61"-72"
18
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
73"-84"
18
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a
85"-96"
16
56"
T.D.C. W/2C.T.R. & J.T.R.
T-25a
T.D.C. W/2C.T.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


10" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-8"
24
56"
T.D.C.
T-25a

T.D.C.
T-25a

9"-12"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
13"-18"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
19"-26"
22
56"
T.D.C. W/CENTER A.R.
T-25a
T.D.C. W/CENTER A.R.
T-25a
27"-28"
20
56"
T.D.C. W/CENTER A.R.
T-25a
T.D.C. W/CENTER A.R.
T-25a
29"-42"
20
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
43"-72"
18
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
73"-84"
16
56"
T.D.C. W/CENTER A.R. & J.T.R.
T-25a
T.D.C. W/CENTER A.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, THIRD EDITION 2005


Return to Quickfind Index Top of Page


1" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-12"
26
59"
FLAT SLIP
T-6 24 GA
FLAT DRIVE
T-1 24 GA
13"-18"
26
59"
STANDING SLIP
T-11 26 GA

FLAT DRIVE
T-1 24 GA

19"-30"
26
56"
T.D.C.
T-25a
T.D.C.
T-25a
31"-42"
24
56"
T.D.C.
T-25a
T.D.C.
T-25a
43"-54"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
55"-60"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
61"-72"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
73"-84"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
85"-96"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
96"&UP
18
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-20, TABLE 1-4


Return to Quickfind Index Top of Page


2" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
 
0"-10"
26
59"
FLAT SLIP
T-6 24 GA
FLAT DRIVE
T-1 24 GA
Ref. 1
11"-14"
26
59"
STANDING SLIP
T-11 26 GA

FLAT DRIVE
T-1 24 GA

Ref. 1
15"-26"
26
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 1,2
27"-30"
24
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 1,2
31"-36"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 2
37"-42"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 2
43"-54"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
Ref. 2
55"-84"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
85"-96"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
97"&UP
18
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-22, TABLE 1-5
2. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1997, ADDENDUM 1, PAGE 1-41-6, TABLE 1-55


Return to Quickfind Index Top of Page


3" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-12"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
13"-26"
24
56"
T.D.C.
T-25a

T.D.C.
T-25a

27"-30"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
31"-36"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
37"-42"
22
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
43"-72"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
63"-84"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
85"-UP
18
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-24, TABLE 1-6


Return to Quickfind Index Top of Page


4" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-10"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
Ref. 1
11"-12"
26
56"
T.D.C.
T-25a

FLAT DRIVE
T-1 24 GA

Ref. 1
13"-22"
24
56"
T.D.C.
T-25a
T.D.C.
Ref. 1
23"-28"
22
56"
T.D.C.
T-25a
T.D.C.
Ref. 1
29"-60"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C.
Ref. 2
61"-72"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
73"-UP
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 1,2

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-26, TABLE 1-7
2. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1997, ADDENDUM 1, PAGE 1-41-7, TABLE 1-75


Return to Quickfind Index Top of Page


6" W.G.
STATIC
POS. OR NEG.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-8"
26
59"
STANDING SLIP
T-11 26 GA
FLAT DRIVE
T-1 24 GA
Ref. 1
9"-12"
24
56"
T.D.C.
T-25a

T.D.C.
T-25a

Ref. 1
13"-24"
22
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 1
25"-26"
20
56"
T.D.C.
T-25a
T.D.C.
T-25a
Ref. 1
27"-48"
22
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
49"-54"
20
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
55"-60"
18
56"
T.D.C. W/C.T.R.
T-25a
T.D.C. W/C.T.R.
T-25a
Ref. 2
61"-72"
18
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 2
73"-UP
16
56"
T.D.C. W/C.T.R. & J.T.R.
T-25a
T.D.C. W/C.T.R. & J.T.R.
T-25a
Ref. 1

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
A.R. ANGLE REINFORCEMENT
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-28, TABLE 1-8
2. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1997, ADDENDUM 1, PAGE 1-41-7, TABLE 1-85


Return to Quickfind Index Top of Page


10" W.G.
STATIC
POS.

STANDARDS
DUCT CONSTRUCTION TABLE

FOR GALVANIZED · 304 S.S. · 316 S.S. DUCTWORK
(NOT FOR ALUMINUM)
DUCT
SIZE
DUCT
GAUGE
JOINT
LENGTH
WIDE SIDE
CONNECTOR
NARROW SIDE
CONNECTOR
0"-30"
26
60"
DUCTMATE35
"E" I.R.

DUCTMATE35
"E" I.R.

31"-36"
24
60"
DUCTMATE35
"E" I.R.
DUCTMATE35
"E" I.R.
37"-42"
22
60"
DUCTMATE35
"F" I.R.
DUCTMATE35
"F" I.R.
43"-48"
22
60"
DUCTMATE35
"G" I.R.
DUCTMATE35
"G" I.R.
49"-54"
22
60"
DUCTMATE35
"H" I.R.
DUCTMATE35
"H" I.R.
55"-60"
22
60"
DUCTMATE35
"H" I.R.,J.T.R.
DUCTMATE35
"H" I.R.,J.T.R.
61"-84"
20
60"
DUCTMATE35
"H" I.R.,J.T.R.
DUCTMATE35
"H" I.R.,J.T.R.
85"-UP
18
60"

DUCTMATE35
"H" I.R.,J.T.R.

DUCTMATE35
"H" I.R.,J.T.R.

NOTES:
J.T.R. - JOINT TIE ROD
C.T.R. - CENTER TIE ROD
TIERODS ARE 1/2' EMT
IF MPT (MID-POINT TIE RODS) ARE USED, THE REINFORCEMENT SPACING IS BASED ON 2 1/2'
REFERENCES:
DUCTMATE INDUSTRIES, INC., RECTANGULAR CONSTRUCTION STANDARDS, 1995 EDITION, PAGE 10, TABLE 7


Return to Quickfind Index Top of Page



BEADED DUCT

 

Beaded Duct

 

REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-75, FIGURE 1-8

Return to Quickfind Index Top of Page



LONGITUDINAL SEAMS

 

Longitudinal Seams

 

REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-67, FIGURE 1-5

Return to Quickfind Index Top of Page



T.D.C. CONNECTORS

 

T.D.C. Connectors

 

REFERENCES:
SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995,

Return to Quickfind Index Top of Page



TRANSVERSE CONNECTORS

 

Transverse Connectors

 

REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 1-61, FIGURE 1-4
2. SEE DUCT CONSTRUCTION TABLES FOR LIMITS OF APPLICATION


Return to Quickfind Index Top of Page



DUCT LINER
INSTALLATION

 

 

Duct Liner Installation

 

 

LINEAR FASTENING SCHEDULE
VELOCITY
DIMENSIONS
 
A
B
C
D
E
0-2500 FPM
3"
12"
4"
6"
18"
2501-6000 FPM
3"
6"
4"
6"
16"

Welded Pin Integral Head

REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGES 2-24 and 2-28, FIGURES 2-19 AND 2-20


Return to Quickfind Index Top of Page



BRANCH CONNECTIONS

 

Branch Connections

 

REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 2-8, FIGURE 2-6
2. EXTRACTORS TO BE FURNISHED AND INSTALLED BY ERECTORS WHERE SPECIFIED


Return to Quickfind Index Top of Page



SINGLE TURNING
VANES

 

 

Single Turning Vanes

 

 

VANE SCHEDULE
R
SP.
GA
SMALL
2"
1 1/2"
24
LARGE
4 1/2"
3 1/4"
22

 

 

Vane Fastening Detail

REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 2-5 and 2-6, FIGURES 2-3 AND 2-4
2. MAXIMUM UNSUPPORTED VANE LENGTH IS 36"


Return to Quickfind Index Top of Page



AIRFOIL TURNING VANES

 

Airfoil Turning Vanes
Vane Fastening Detail

 

REFERENCES:
1. SMACNA-HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE, SECOND EDITION 1995, PAGE 2-5, FIGURES 2-3 AND 2-4
2. MAXIMUM UNSUPPORTED SMALL VANE LENGTH IS 48" AND LARGE LENGTH VANE IS 72"


Return to Quickfind Index Top of Page

C.H.I. Manufacturing is
Proud of our Affiliation
With These Fine Companies

Aire Technologies
Bramec
CertainTeed
Cooper B-Line
Design Polymerics
Ductmate
DuroDyne
FlowRight
Foster
Gripple
Hardcast
Hart & Cooley
Ideal Tape
JB Lamborn
Knauf Insulation
Lukjan
Malco
Midwest Ducts
Sheet Metal Connectors
Simpson DuraVent
Spiracoustics Plus
Venture Tape