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Technical Advice

01702 512424


Protection, airflow and visibility

The AIR WAVE perforated and punched is one of our most highly desired and affordable products. Designed very similar to our CLEAR WAVE, the AIR WAVE uses the same hinge and hangar technology to insure top quality in relation to industry standards.

AIR WAVE Perforated - small circular punched holes are made in a painted steel sheet to grant air and light circulation.

AIR WAVE Slotted – 6 mm x 32mm punched oblong slots in even horizontal columns.

Both designs expose the secure area visually while providing a rigid physical barrier.


Side acting top hung sliding folding shutter


Curtain constructed of 1.83 mm thick x 152mm thick aluminium panels. Panels framed by full height butt hinges on 178mm centres, full height between top and bottom closure panels. Perforated Steel Panels are made of 3.2 mm thick by 152 mm wide, steel panels, full height between top and bottom closure panels. Panels perforated with round holes 9.5 mm diameter round holes in a staggered pattern. Calculated airflow, Through Panel: 47%, Through Closure: 39%.

Track & Trolleys

The overhead Track: 33 mm wide x 46 mm high thick extruded aluminum section with continuous recess for splice tongues and pins. Standard curves are available with 254mm or 356mm radius. Custom radius curved track is available to suite most conditions.

Trolleys: 29 mm diameter nylon tired ball bearing wheels; two wheel assembly at each hanger; three wheel assembly at all vertical members.


Standard factory finishes are 10 micron clear anodizing, K1285 (white), K70632 (light bronze), K71232 (medium bronze) or K90421 (black) Duracron acrylic paint. Optional acrylic paint is available upon request to match RAL Colours (Consult factory).


Manual push / Pull operation.

Locking Options

The grille incorporates 33mm x 62mm vertical posts spaced not to exceed 3,000 mm on center and located at each curve. Lead posts utilize concealed, masterkeyable cylinder operated hook-bolt with lock operable from both sides of curtain or optional thumb turn cylinder lock operable from tenant side of curtain that engages a full height wall channel. Intermediate posts provided with concealed, masterkeyable cylinder operated bottom ratcheted drop bolts with lock operable from interior or exterior side of the opening. Posts with drop bolts include dust proof stainless steel floor sockets.

The locking knobs are manufactured of heavy-duty aluminum construction.

The locking posts have a unique self-adjusting locking rod with (6) different positions of adjustments to allow for deflections in bulkheads and irregularities in finished flooring. The quick-connect locking post is also exclusive to Cornell grilles and closures. This post allows replacing or servicing of the locking post without removing the entire door. Also lead and end posts have special softly padded astragals that prevent damage too adjacent finished such as glass or mirror pocket doors and columns.

Weight & Stacking

Grille weight is approximately 10 kg/metre square. Grille support must be able to carry the weight of a fully stacked door at any point along its length. Support is to carry the total weight / the total stacking

Minimum stacking is 87.5mm/metre of opening plus 89mm per locking member (consult factory for critical project specific stack dimensions). The structural support must be capable of carrying the weight of a fully stacked door at any point along its length.

General Upgrades

Emergency egress doors: emergency egress doors are an available option on VistaPane side-folding grilles. Egress doors to be fabricated from the same material and pattern as the grille curtain and be provided with a thumb turn lock on the secure side of the opening.

Pocket Doors: Factory supplied pocket doors are an available option with all side-folding units. Pocket doors stop at underside of track and look better aesthetically when the track is recessed in the ceiling or soffit. Pocket doors and frames are fabricated from A36 HR steel, USS 12-gauge. Hinges are 76.2 mm non-mortise type. Lock is a 25.4 mm security mortise cylinder. Standard finish is a phosphate treatment followed by a light gray baked-on polyester powder coat; minimum 0.065 mm cured film thickness. Optional RAL colors are available.


Peace of Mind Warranties

All our products are guaranteed against defect of material or workmanship by Guardian Doors, subject to correct, maintenance and operation, for a period of 12 months from the date of installation. We offer extended warranties for up to 5 years with an agreed maintenance contract. Contact us for more details.

Maintenance Packages

Planned preventative maintenance

See our maintenance section or contact us for more information. Guardian's repair and maintenance services and engineers are accredited to the DHF's TS004 Repairs and Maintenance standard.

It is a legal requirement - as failure to show evidence of maintenance could mean prohibition & enforcement notices being served and fines up to £5000 and imprisonment for 2 years. 'Safety In Use' - the New European CEN Standards legislation - states that all types of door should be maintained in an efficient state, in efficient working order and in good repair. For further clarification visit

Routine maintenance prolongs the operational life of the installation and ensures that the installation is kept in good working order - helping to prevent accidents and damage which in turn results in down time, effecting work flow, productivity and resulting in loss of revenue. It assists in identifying potential problems which can easily be rectified.

Registered Office

45 Progress Road
0800 7836602
+44 (0)1702 260117
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Established in 1979, Guardian Industrial Doors design, manufacture, supply and maintain industrial and commercial roller shutters, doors and gates.

©2015 Guardian Doors