The HLS-catch is a temperature controlled
door catch. In a set position the catch is housed inside the latch housing, but
slides out under excessive room temperatures. This fixates the door in its frame
and prevents the door from pulling skew, thereby preventing fire admission due
to open gaps between the double doors, and the door and frame. The bolt slides
out before expansion of the foam materials starts.
For single and
double 30 and 60-minute fire resistant doors:
Timber and steel doors in timber, steel or steel plate frames.
Mounted on the lock side in the doorpost, or in the door lintel or frame
For use with a suitable lock with catch-bolt (and door handles) with extra
high or wide doors (in some cases not possible to test) for extra fixation, or
with a non fire-resistant lock for additional fire protection.
For use with locks without catch bolts, on emergency exit doors, that will no
longer shut the door after the emergency exit.
For use with timber doors in (plate) steel frames due to the different forces
at work in timber and steel when exposed to fire (timber is drawn to the fire,
while steel bends away from the source of fire)
The application and operation is neutral with respect to other special
(electronic) devices installed on any given door (e.g. burglar proofing and
The most user-friendly solution (for double-doors)
The use of double doors without rabbet enables the use of standard
door-springs (obviates the need for a locking sequence control system)
All door-springs set to a maximum locking pressure of 30N without latch action
(but possibly with lock retarding system) makes operation comfortable and
The ease of use when it concerns fire and emergency escape doors is of paramount
Standard application of the HLS-catch
offers the following user-friendly benefits:
Locks on doors
do not need to comply with fire-resistant requirements;
- The catch is
"neutral" with respect to other devices, such as door position signaling
systems, electronic access control and panic locks
(the lock will not lock the door after the emergency escape)
- Installation in
combination with swelling strips and draft strips obviates the need for
protective profiles. This enables the use of standard door-springs
(without locking sequence control systems), which offers a
number of technical and cost-saving benefits.
Pipe and cable shafts
- The HLS-catch
can also be used on hatches in pipe and cable shafts, (patio) interior
windows and smoke removal ducts.