Minnesota Administrative Rules

1346.0603 SECTION 603 DUCT CONSTRUCTION AND INSTALLATION.

Subpart 1.

[Repealed, 34 SR 537]

Subp. 2.

[Repealed, 44 SR 1085]

Subp. 2a.

[Repealed, 44 SR 1085]

Subp. 3.

[Repealed, 44 SR 1085]

Subp. 4.

[Repealed, 44 SR 1085]

Subp. 5.

[Repealed, 44 SR 1085]

Subp. 6.

[Repealed, 44 SR 1085]

Subp. 7.

[Repealed, 44 SR 1085]

Subp. 8.

Section 603.8.

IMC Section 603.8 is amended by adding a subsection to read as follows:

603.8.4 Drainage and insulation.

Underground ducts shall be insulated in accordance with amended IMC Section 604.1 and provided with drain tile around the perimeter of the duct system to prevent water intrusion. The top of the drain tile shall be installed at an elevation lower than the bottom of the underground duct system. The building official may approve an alternate drainage system if soil conditions are adequate.

Subp. 9.

[Repealed, 44 SR 1085]

Subp. 10.

Section 603.18.

IMC section 603.18 is amended by adding a subsection to read as follows:

603.18.3 Adjustment of volume dampers. Volume dampers shall be adjusted to the required airflow of the system and locked in place. In finished or inaccessible locations, a friction-type register box may be used.

Statutory Authority:

MS s 16B.59; 16B.61; 16B.64; 326B.02; 326B.101; 326B.106; 326B.13

History:

15 SR 71; 29 SR 299; L 2007 c 140 art 4 s 61; art 13 s 4; 34 SR 537; 39 SR 690; 44 SR 1085

Published Electronically:

April 22, 2020