][3.2.2.2
Flame-Heated Equipment
Do not place flame-heated equipment on roof. Provide and maintain a fire
extinguisher adjacent to flame-heated equipment and on the roof.
][3.2.2.3
Open Flame Application Equipment
**************************************************************************
NOTE: Include this requirement when torch-applied
modified bitumen sheet roofing is specified or when
torch application of base flashing is permitted.
**************************************************************************
Torches and other open flame equipment shall be specifically designated for
use in application of modified bitumen materials and approved by the
modified bitumen sheet manufacturer. Open flame equipment shall not be
ignited (burning) when left unattended. Provide and maintain a fire
extinguisher adjacent to open flame equipment on the roof. Specific
requirements for fire watches and burn permits exist. These requirements
will be reviewed at the preroofing conference.
]3.2.2.4
Electric-Heated Equipment
Provide adequate electrical service as required by manufacturer of
electrical equipment to ensure against damage to equipment and property and
to ensure proper application of roofing materials.
][3.2.3
Heating of Asphalt
**************************************************************************
NOTE: Include paragraph when hot-mopped membranes
are used or base sheets are hot-mopped to
non-nailable substrates.
**************************************************************************
Break up solid asphalt on a surface free of dirt and debris. Heat asphalt
in kettle designed to prevent contact of flame with surfaces in contact
with the asphalt. Kettles shall have visible working thermometer and
thermostatic controls set to the temperature limits specified herein. Keep
controls in working order and calibrated. Use immersion thermometer,
accurate within a tolerance of plus or minus one degree C (2 degrees F), to
check temperatures of the asphalt frequently. When temperatures exceed
maximums specified, remove asphalt from the site. Do no permit cutting
back, adulterating, or fluxing of asphalt.
[3.2.3.1
Temperature Limitations for Asphalt
**************************************************************************
NOTE: Include paragraph when hot-mopped membranes
are used or base sheets are hot-mopped to
non-nailable substrates.
**************************************************************************
Heat and apply asphalt at the temperatures specified below unless specified
otherwise by manufacturer's printed application instructions. Use
thermometer to check temperature during heating and application. Have
kettle attended constantly during heating process to ensure specified
temperatures are maintained. Do not heat asphalt above its finished
blowing temperature (FBT). Do not heat asphalt between 260 and 274 degrees
SECTION 07550
Page 25
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