The Department of Fire Services (DFS) is
pleased to provide this list of frequently asked
questions (FAQ’s) regarding hot works in
Massachusetts. The brochure covers the most
common questions concerning hot works
safety in the state.
The DFS Code Compliance & Enforcement Unit
works in conjunction with local communities to
ensure that hot work is conducted safely and
in accordance with the state re code. We have
listed the most important terms that you will
need to understand.
Denitions
Hot Work - Work involving, burning, welding,
or a similar operation that is capable of
initiating res or explosions. Examples include,
but are not limited to: welding, cutting,
grinding, soldering, heat treating, hot riveting,
torch-applied roong, abrasive blasting, and
powder-driven fasteners.
Qualied Person – As of July 1, 2018,
a qualied person is a person who has
successfully completed training approved by
the State Fire Marshal.
Permit Authorizing Individual (PAI) –An
individual designated by management to
authorize hot work.
Permissible Area – There are two types
of permissible areas, designated area and
permitted area.
Designated Area - A specic location
designed and approved for hot work
operations that is maintained re-safe, such
as a maintenance shop or a detached outside
location, that is of noncombustible or re-
resistive construction, essentially free of
combustible and ammable contents, and
suitably segregated from adjacent areas.
Permitted Area - Any location, other than
a designated area which is approved for hot
work and is made re-safe by removing or
protecting combustibles from ignition sources.
Hot Work Permit – A permit issued by the
PAI, which shall not be valid for more than
24 hours. Information on the permit should
include work location, type of hot work, the
work to be done, the operator, duration,
equipment, and controls to ensure safety.
Fire Department (AHJ) Permit - A document
issued by the AHJ to a qualied person for the
purpose of authorizing that individual to carry
out the activity of hot work.
Fire Watch - The assignment of a person or
persons to an area for the express purpose
of notifying the re department, the building
occupants, or both of an emergency;
preventing a re from occurring; extinguishing
small res; or protecting the public from re or
life safety dangers.
Frequently Asked Questions
What is the state re code in
Massachusetts? The state re code
is known as the Massachusetts
Comprehensive Fire Safety Code, 527
CMR 1.00. Visit www.mass. gov/dfs and
search for 527 CMR 1. The state re code
adopts NFPA 1 (2015 Edition), and includes
Massachusetts amendments. Within the
code are the appropriate editions of NFPA
standards that must be met.
Where can the requirements for hot
works be found within the state re
code? These requirements are found in
Chapter 41. This section adopts NFPA
51B – Standard for Fire Prevention
During Welding, Cutting, and Other Hot
Work (2014 Edition), which also includes
Massachusetts amendments.
Do the personnel involved in hot work
need to be trained? As of July 1, 2018, for
an individual to be qualied to be a PAI,
perform re watches, perform, supervise
or delegate any activities of hot work
they shall have documentation that he or
she has successfully completed training
approved by the State Fire Marshal.
What are the Permit Authorizing
Individual’s (PAI) primary
responsibilities? The PAI issues the hot
work permit and is charged with ensuring
the health and safety within the permissible
area.