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<br />5537.2 or 6737.3 to sign this document as the person responsible for its preparation; and that I am a licensed2. I affirm that I am eligible under the provisions of Division 3 of the Business and Professions Code Section
<br />contractor preparing documents for work that I have contracted to perform.
<br />FLEXIBLE AIR DUCT SHALL CONFORM TO
<br />U.L. 181, SHALL NOT BE MORE THAN 5 FEET
<br />LONG, AND SHALL NOT BE USED IN LIEU OF
<br />ELBOWS OR FITTINGS, EXCEPT AT A
<br />TERMINAL DEVICE. CMC 603.4.1, 603.5.
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK, ON 4' CENTERS.
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK ON 8' CENTERS WITH 1 1/2" x 1 1/2" x 1/8" ANGLES
<br />ON CENTER LINE BETWEEN.
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK, ON 4' CENTERS WITH CROSS BREAK.
<br />INSIDE LONGITUDINAL STANDING SEAMS WITH 1 1/8" x 1 1/8" x 1/8" ANGLES ON 2' CENTERS ON EXTERIOR.
<br />1 1/2" STANDING SEAM ON 3' CENTERS.
<br />55 THRU 6020
<br />1 1/2" STANDING SEAM ON 3' CENTERS.
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK, ON 4' CENTERS WITH CROSS BREAK.
<br />INSIDE LONGITUDINAL STANDING SEAMS WITH 1 1/8" x 1 1/8" x 1/8" ANGLES ON 2' CENTERS ON EXTERIOR.
<br />ON CENTER LINE BETWEEN.
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK ON 8' CENTERS WITH 1 1/2" x 1 1/2" x 1/8" ANGLES
<br />1 1/2" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK, ON 4' CENTERS.
<br />43 THRU 54
<br />31 THRU 42
<br />22
<br />1" BAR SLIP, REINFORCED BAR SLIP, OR 1" POCKET LOCK, ON 5' CENTERS.
<br />1" BAR SLIP, REINFORCED BAR SLIP, OR POCKET LOCK ON 10' CENTERS WITH 1" x 1" x 1/8" ANGLES
<br />ON CENTER LINE BETWEEN.
<br />INSIDE LONGITUDINAL STANDING SEAMS WITH 1" x 1" x 1/8" ANGLES ON 5' CENTERS.
<br />1" STANDING SEAM ON 5' CENTERS.
<br />HEMMED "S" SLIP, 1" BAR SLIP, OR 1" POCKET LOCK ON 10' CENTERS WITH CROSS BREAK 1"STANDING SEAM ON 5' CENTERS.
<br />ON CENTER LINE BETWEEN.
<br />HEMMED "S" SLIP, 1" BAR SLIP, OR 1" POCKET LOCK ON 10' CENTERS WITH 1"x1" x 1/8" ANGLES
<br />HEMMED "S" SLIP, 1" BAR SLIP, OR 1" POCKET LOCK ON 5' CENTERS.
<br />19 THRU 30
<br />24
<br />DRIVE SLIP, PLAIN "S" SLIP, OR 1" POCKET LOCK13 THRU 18
<br />GALVANIZED STEEL DUCT GAGE, PER SMACNA 006-2006 HVAC DUCT CONST. STANDARDS UP TO 2" W.C.
<br />U.S. STEEL STD.
<br />(GAGE)
<br />UP THRU 12
<br />(INCHES)
<br />26
<br />DUCT DIMEN.
<br />DRIVE SLIP, PLAIN "S" SLIP, OR 1" POCKET LOCK
<br />MINIMUM METAL GAUGES
<br />PERMISSIBLE GIRTH JOINTS AND LOGITUDINAL SEAMS
<br />MAXIMUM 2 -INCH W.G.
<br />STATIC NEGATIVESTATIC POSITIVE
<br />MAXIMUM 10 -INCH W.G.
<br />0.024 (24)
<br />INCH (GAGE)
<br />0.036 (20)
<br />0.030 (22)
<br />0.047 (18)
<br />0.058 (16)
<br />0.024 (24)
<br />INCH (GAGE)
<br />0.047 (18)
<br />0.036 (20)
<br />0.030 (22)
<br />0.024 (24)
<br />0.019 (26)
<br />0.016 (28)
<br />0.070 (14)0.058 (16)
<br />INCH (GAGE) INCH (GAGE)
<br />0.019 (26)
<br />0.024 (24)
<br />0.030 (22)
<br />0.036 (20)
<br />0.047 (18)
<br />0.019 (26)
<br />0.047 (18)
<br />0.024 (24)
<br />0.036 (20)
<br />0.047 (18)
<br />0.058 (16)
<br />0.030 (22)
<br />0.036 (20)
<br />0.024 (24)
<br />LOGITUDINAL SEAM SPIRAL SEAM SPIRAL SEAM LOGITUDINAL SEAM
<br />STATIC POSITIVE DUCT DIAMETER
<br />(INCHES)
<br />0.024 (24)
<br />0.036 (20)
<br />0.030 (22)
<br />0.019 (26)
<br />0.016 (28)
<br />0.016 (28)
<br />INCH (GAGE)
<br />0.047 (18)
<br />27 THROUGH 36
<br />61 THROUGH 84
<br />51 THROUGH 60
<br />37 THROUGH 50
<br />15 THROUGH 26
<br />9 THROUGH 14
<br />3 THROUGH 8
<br />SPIRAL SEAM
<br />0.058 (16)
<br />0.047 (18)
<br />0.036 (20)
<br />0.030 (22)
<br />0.024 (24)
<br />0.019 (26)
<br />0.016 (28)
<br />MAXIMUM 2 -INCH W.G.
<br />LOGITUDINAL SEAM
<br />INCH (GAGE)
<br /> GALVANIZED STEEL DUCT GAGE, PER 602.1 C.M.C., SMACNA 006-2006 HVAC DUCT CONST. STANDARDS
<br />a. All appliances designed to be in a fixed position shall be securely fastened in place in accordance with the manufactures installation instructions. Supports for appliances shall be
<br />designed and constructed to resist horizontal and vertical loads within the stress limitations of the CBC. [CMC 303.4]
<br />b. All materials exposed within ducts and plenums including any above ceiling return air plenum shall be noncombustible or shall have a flame spread index not to exceed twenty-five (25)
<br />and a smoke developed index not to exceed then fifty (50) when tested as a composite product in accordance with ASTM E 84 OR UL 723 and shall comply with
<br />all requirements of the 2022 CMC Section 602.2.
<br />c. Installation of ducts shall be in accordance with Section 603.0 of the 2022:
<br />1. All ductwork for heating and cooling system or evaporative cooling system shall be conducted through duct systems constructed of metal as set forth in the
<br />SMACNA HVAC Duct Construction Standard âfi Metal and Flexible. Factory made air ducts shall be approved for the use intended or shall comply with the 2022 CMC
<br />referenced standards Chapter 17.
<br />2. Joints and seems for duct systems shall comply with SMACNA HVAC Duct Construction Standard âfi Metal and Flexible. Joints of ducts systems shall be
<br />made substantially airtight by means of tapes, mastics, gasketing, or other Crimp joints for round ducts shall have a contact lap of not less than
<br />1-1/2" and shall be mechanically fastened by means of not less than 3 sheet-metals screws equally spaced around the joint, or an equivalent fastening method.
<br />3. Ducts shall be supported at each change of direction and in accordance with SMACNA HVAC Duct Construction Standard âfi Metal and Flexible.
<br />d. Ducts and plenums shall comply with Section 120.4 of the 2022 California Building Energy Efficiency Standards. Provide the following notes on the plans to demonstrate compliance:
<br />Portions of supply-air and return-air ducts conveying heated or cooled air located in one or more of the following spaces shall be insulated to a minimum installed level of R-8:
<br />a. Outdoors; or
<br />b. In a space between the roof and an insulated ceiling; or
<br />c. In a space directly under a roof with fixed vents or openings to the outside or unconditioned spaces; or
<br />d. In an unconditioned crawlspace; or
<br />e. In other unconditioned spaces.
<br />1. Portions of supply-air ducts that are not in one of these spaces, including ducts buried in concrete slab, shall be insulated to a minimum installed level
<br />of R-4.2 (or any higher level required by CMC Section 604.1) or be enclosed in directly conditioned space.
<br />2. All factory-fabricated duct systems shall comply with UL 181 for ducts and closure systems, including collars, connections, and splices, and be labeled as complying with UL 181.
<br />Environmental air duct exhaust shall terminate not less than 3 ft from a property line, 10 ft from a forced air inlet, and 3 ft from openings into the building. Environmental exhaust ducts shall not discharge
<br />onto a public walkway.
<br />2500 S Redhill Ave
<br />#100 and #110 -
<br />101113828-29 and
<br />20178695
<br />04/20/23
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