// CODE SNIPPET
507.4.7 Building and Structural Contact
JUMP TO FULL CODE CHAPTER
A duct
shall be permitted to contact noncombustible floors, interior
walls, and other noncombustible structures or supports,
but it shall not be in contact for more than 50
percent of its surface area for each lineal foot of contact
length. [NFPA 96:4.4.1]
Where the duct is
listed for zero clearance to combustibles or otherwise
protected with a material or product listed for
the purpose of reducing clearance to zero, the duct
shall be permitted to exceed the contact limits of
Section 507.4.7 without additional corrosion protection.
[NFPA 96:4.4.3]
Related Code Sections
507.3.7 Exhaust Systems, Building and Structural Contact
A duct shall be permitted to contact noncombustible floors, interior walls,
and other noncombustible structures or supports, but it shall ...
California Mechanical Code 2016 > 5 Exhaust Systems > 507.0 General Requirements > 507.3 Clearance > 507.3.7 Building and Structural Contact
507.4.7 Exhaust Systems, Building and Structural Contact
A duct
shall be permitted to contact noncombustible floors, interior
walls, and other noncombustible structures or supports,
but it shall ...
California Mechanical Code 2019 > 5 Exhaust Systems > 507.0 General Requirements > 507.4 Clearance > 507.4.7 Building and Structural Contact
1217.2 Hydronics, Radiant Under-Floor Heating
Floor surface temperatures
shall not exceed the following temperatures:
85°F (29°C) in dwellings, buildings, or structures.
85°F (29°C ...
California Mechanical Code 2016 > 12 Hydronics > 1217.0 Radiant Heating and Cooling > 1217.2 Radiant Under-Floor Heating