LEGISLATIVE HISTORY
ORDINANCE NO. BL2010-679
An ordinance amending Title 16 of the Metropolitan Code of Laws by amending portions of the adopted building and mechanical codes.
NOW, THEREFORE BE IT ENACTED BY THE COUNCIL OF THE METROPOLITAN GOVERNMENT OF NASHVILLE AND DAVIDSON COUNTY:
Section 1. That Section 16.16.230 of the Metropolitan Code of Laws, Amendments gas/mechanical sections of the International Residential Code for One and Two-Family Dwellings, is hereby amended by adding a new subsection B as follows and re-lettering the subsequent subsections accordingly:
B. Section M1502.6 of the 2006 Edition of the International Residential Code is amended by deleting Section M1502.6 and substituting the following:
M1502.6 Duct length.
The maximum length of a clothes dryer exhaust duct shall not exceed 35 feet (7620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.8 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
Exceptions:
1. Where the make and model of the clothes dryer to be installed is known and the manufacturer’s installation instructions for the dryer are provided to the building official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions.
2. Where large-radius 45-degree (0.8 rad) and 90-degree (1.6 rad) bends are installed, determination of the equivalent length of clothes dryer exhaust duct for each bend by engineering calculation in accordance with the ASHRAE Fundamentals Handbook shall be permitted.
Section 2. That Section 16.16.260 of the Metropolitan Code of Laws, International Mechanical Code—Local Amendments, is hereby amended by adding a new subsection E as follows and re-lettering the subsequent subsections accordingly:
E. Section 504.6.1 of the 2006 Edition of the International Mechanical Code is amended by deleting Section 504.6.1 and substituting the following:
504.6.1 Maximum length.
The maximum length of a clothes dryer exhaust duct shall not exceed 35 feet (7620 mm) from the dryer location to the outlet terminal. The maximum length of the duct shall be reduced 2½ feet (762 mm) for each 45 degree (0.79 rad) bend and 5 feet (1524 mm) for each 90 degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
Exception: Where the make and model of the clothes dryer to be installed is known and the manufacturer’s installation instructions for such dryer are provided to the building official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions.
Section 3. That this ordinance shall take effect from and after its final passage, the welfare of The Metropolitan Government of Nashville and Davidson County requiring it.
Sponsored by: Rip Ryman
| LEGISLATIVE HISTORY |
|
|---|---|
| Introduced: | May 4, 2010 |
| Passed First Reading: | May 18, 2010 |
| Referred to: | Codes Committee |
| Passed Second Reading: | June 1, 2010 |
| Passed Third Reading: | June 15, 2010 |
| Approved: | June 18, 2010 |
| By: | |