SHEET METAL STANDARDS
DUCT GUAGE AND ENFORCEMENT FOR 1” ESS AND DRIVE (+/-)
SHEET METAL STANDARDS
DUCT GUAGE AND ENFORCEMENT FOR 2”W.G.AND DRIVE (+/-)
SHEET METAL STANDARDS
DUCT GUAGE AND ENFORCEMENT FOR 3”W.G.AND DRIVE (+/-)
NOTES
1.
TDC DUCT CONSTRUCTED PER SMACNA STANDARDS - FIRST EDITION 1995
2.
DUCT FABRICATED USING PITTSBURG SEAMS
3.
ALL DUCT STIFFENED BY MACHINE FORMED BEADS SPACEDAT 12”O.C.
4.
DUCTWORK TO BE SEALED PER SMACNA HVAC TABLE 1-2
5.
TDC CNT-JNT-CONDU-LOCAT
TDC CONNECTOR CENTER OF DUCTANDAT TDC CONNECTOR
GAUGE OF METAL
DUCT
DIMENSIONS
5’
JOINT
4’
JOINT
2.5’
JOINT
2’
JOINT
JOINT CONSTRUCTION
REINFORCING
0-12”
26
26
26
26
FLAT ESSES AND DRIVE
NONE
13-30”
26
26
26
26
1”ST ESSES AND DRIVE
NONE
31-48”
24
24
24
26
1”ST ESSES AND DRIVE
NONE
49-60”
22
22
24
24
1”ST ESSES AND DRIVE
NONE
61-72”
22
22
22 NO
CNT. REF
22 NO
CNT. REF
TDF
NONE
73-96”
22
22
22 NO
CNT. REF
22 NO
CNT. REF
TDF CNT - JNT
NONE
97”AND UP
18
18
20 NO
CNT. REF
20 NO
CNT. REF
TDF CNT - JNT 48”MAX SPACING
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
GAUGE OF METAL
DUCT
DIMENSIONS
5’
JOINT
4’
JOINT
2.5’
JOINT
2’
JOINT
JOINT CONSTRUCTION
REINFORCING
0-12”
26
26
26
26
HEMMED “S”AND DRIVE
NONE
13-24”
26
26
26
26
TDF
NONE
25-30”
24
24
26
26
TDF
NONE
31-36”
22
24
26
26
TDF
NONE
37-42”
20
24
24
24
TDF
NONE
43-48”
20
22
24
24
TDF
NONE
49-54”
22
22
24 NO
CNT. REF
24 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
55-60”
22
22
22 NO
CNT. REF
22 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
61-84”
22
22
22 NO
CNT. REF
22 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
85-96”
20
20
20 NO
CNT. REF
20 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
97”AND UP
18
18
18 NO
CNT. REF
18 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
16GA V-TYPE STIFFENER
GAUGE OF METAL
DUCT
DIMENSIONS
5’
JOINT
4’
JOINT
2.5’
JOINT
2’
JOINT
JOINT CONSTRUCTION
REINFORCING
0-12”
24
24
24
24
HEMMED “S”AND DRIVE
NONE
13-26”
24
24
24
24
TDF
NONE
27-30”
22
24
24
24
TDF
NONE
31-42”
20
22
24
24
TDF
NONE
43-48”
24
24
24 NO
CNT. REF
24 NO
CNT. REF
TDF
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
49-60”
22
22
24 NO
CNT. REF
24 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
61-72”
22
22
22 NO
CNT. REF
22 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
73-84”
20
20
20 NO
CNT. REF
20 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
85-96”
18
18
18 NO
CNT. REF
20 NO
CNT. REF
TDF CNT - JNT
1 ½WIDE X 1 ½ HEIGH
18GA V-TYPE STIFFENER
97”AND UP
18
18
18 NO
CNT. REF
18 NO
CNT. REF
TDF CNT - JNT 48”MAX SPACING
1 ½WIDE X 1 ½ HEIGH
16GA V-TYPE STIFFENER
