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FIRE FOCUS
members must be ready with hoselines.
In balloon-frame construction, streams
directed upward into stud bays will also
cascade downward to aid in suppressing fire below because there’s nothing
to block the downward flow of water.
Premature and overly aggressive opening
of concealed spaces without water
application will give the fire exactly what
it wants to intensify and extend—a flow
path and an additional supply of oxygen.
Roof ventilation will help relieve the attic
of heat and fire gases; but, considering
its steep pitch, it would be a difficult
and dangerous operation. Cutting a hole
in the roof from a roof ladder, an aerial
ladder, or the basket of a tower ladder
should work. Only highly skilled and
experienced firefighters should attempt
vertical ventilation on this type of roof,
and it must be performed in accordance
with a risk/benefit evaluation— in other
words, is it worth the risk? The Underwriters Laboratories Fire Service
Research Institute (UL FSRI) Attic Fire
Program examines why roof ventilation
must be coordinated with fire suppression—because cutting a hole in a roof or
any ventilation without fire suppression
will intensify a fire in an attic.
If you do not suspect extension in balloon-frame walls, you must verify that there
is no fire extension by meticulously removing baseboards and carefully examining
the attic. Removing a baseboard from an
exterior wall can also identify the presence
of balloon-frame construction. When the
wall is opened behind the baseboard,
probe the stud bay below with a pike pole.
Floors in balloon-frame construction are
supported by a ledger notched and nailed
horizontally across the studs. If it is indeed
balloon-frame construction, the pike pole
can be extended into a stud bay between
the subfloor and exterior sheathing. Similarly, in bearing walls, a pike pole will fit
in the space between the ledger and the
exterior sheathing.
Forcing Burglar Gates
The two inward-swinging front doors
are fortified with outward-swinging
burglar gates (photos 4-5). Burglar gates
are commonly secured with one or more
tubular dead bolts. A tubular dead bolt
is the most common type of additional
lock installed by homeowners to give
their doors extra security. A tubular dead
bolt is classified as a “rim” lock because
it has a lock cylinder mounted to the
outside surface of a door or gate and a
thumb turn on the inside. When a tubu-
lar dead bolt has lock cylinders mounted
on both the inside and outside surfaces,
it is referred to as a “double dead bolt.”
The term “tubular” comes from the no-
menclature and function of the lock. The
rotational action of a key inserted in the
lock cylinder extends and retracts a dead
bolt in a tubular housing. When locked,
the dead bolt extends 1½ to two inches
out of its tube into a strike or receiver in
the door’s jamb or gate’s frame.
Burglar gates commonly have a strip
of metal that covers the gap between