Cavity Trays Ltd


Cavilintel

lintel with integral

security shutter

in brief...

  • Lintel with built-in facility for vandal-resistant shutter
  • Clear structural opening unobstructed by guides or surface fixings
  • Complete installation requirements including cavitrays, weeps stopends, DPC
  • Benefit of property upgrade immediately or at later date

use
Load bearing lintel to provide support over openings, with retractable integral shutter facility.

introduction
The Cavilintel is designed for use with cavity walls. Unlike a traditional metal lintel, the Cavilintel can accommodate a shutter within its main body. Selection of a Cavilintel instead of a conventional lintel makes little difference to construction procedure when a property is built. However, the Cavilintel does extend to the developer of the property with a vandal-resistant shutter, either immediately or at some time in the future.

cavilintel
All Cavilintels are manufactured to size on a tailor-made basis. Each is supplied packaged to include all the requirements commonly necessary to create a structural opening, accompanied with the damp-proofing obligations as defined within the latest BS5628 -3:2001. The contents of each Cavilintel package are:

Load-bearing metal Cavilintel with compartment area ready to receive shutter.

Preformed DPC cavitray with self-supporting cavity upstand to provide horizontal protection against penetrating rain. Type L stopends to prevent discharge of water into the cavity. Dual-function Type W perp caviweeps / cavivents to evacuate water from the structure. Reinforced and insulated guide channels to close the cavity reveals each side of the opening and accommodate the ends of the shutter. Preformed DPC sill tray to provide damp-proofing integrity at sill level. Electrically operated shutter with a manual override mechanism within the building. (Shutter fitted and commissioned by engineer immediately or at some time in the future if the property is being offered with the option of security upgrade.)

The reinforced insulated guide channels eliminate the requirement for conventional reveal closing. Each guide channel is positioned in the cavity, behind the external masonry leaf. Thus the structural opening and the window or door frames are not inhibited with protruding surface mounted fittings and fixings. 

 When the shutter descends or ascends, the metal linings within the channels provide positive retention of the shutter and promote easy movement. The Cavilintel requires the door or window frame to be set-back in the reveal opening, behind the guide channel. All frames must be free of front projection that might foul the path of the shutter. The set-back frame position necessitating DPC integrity is also established at sill level and this function is provided by the accompanying sill tray. Thus the unique composite package offered by the Cavilintel provides the complete solution, and addresses important damp-proofing and water evacuation design considerations. The Cavilintel package does not leave them as aspects requiring site fabrication.

The Cavilintel is handled and bedded in the traditional manner applicable with metal lintels, additionally observing the slot in the Cavilintel base (through which the shutter operates) is aligned with the corresponding guide channels that rise vertically within the reveal cavities.



 The Cavilintel profile incorporates thermal insulation and is based on a design that also permits continuance of any sheet insulation within the cavity. Steel penetration of the inner leaf is minimised with the design and the protective solid polypropylene cavitrays do not promote a heat-loss path.

The insulated channel guide is available to suit cavity widths of 50mm, 60mm, 75mm, 85mm and 100mm. The channel has locators to aid envelopment within the reveal and is anchored to both skins with special ties. The surface area of each tie is unusually large and promotes solidity of encapsulation. The guide has polymer brush-seals to the outer edges and a metal security channel in which the ends of the vandal-resistant shutter glide up and down.

shutters
The vandal-resistant shutter is electrically operated. Each Cavilintel also has a manual control to permit operation from within the building in the event of a power failure.

 The package fulfils the
damp-proofing
requirements as defined
within the new Code of
practice for the use
of masonry, part 3,
materials and
components, design
and workmanship.
(5628-3:2001, released
late 2001). The profile to
which the lintel product
adheres was originally
the subject of a recorded
application priority date
of 1981 and publication
date of 1983. The
channel guide is based
on CT SF 112.
technical
observations
Branded with name and
logo and proof of type
and accompanying
warranty.

 

Cavity Trays phone 01935 474769 fax 01935 428223 email enquiries@cavitytrays.co.uk