Sectional door grilles

Sectional door grilles

This is specially designed to provide (free) airflow as well as a see-through security screen. This door is commonly used on underground parking entries where airflow and security is required e.g. basement car parking entries, security entrances, bottle shops, boiler rooms etc.

Operation

The doors are normally operated by hand by one person quickly and easily. Doors over 4,00omm high will be fitted with a quick action chain drive and still providing ease of operation (optional extra for doors below 4 metres in height). Electrical motorisation can be fitted to any size door as an optional extra.

Size

Standard design is recommended up to 5 metres high by 8 metres wide or 30 square metres. Should opening exceed these sizes, the manufacturer should be consulted.

Aluminium Grille Door

The aluminium grille door will be divided into panels of approximately 600mm in height and constructed using specially designed aluminium "box type" extrusions machined to match the profiles of the mating members and bolted using full length bolts to provide a neat interlocking joint for structural strength.

The door sections will be divided into equal panels of approximately 1,200mm in width using the intermediate aluminium mullion members and infilled using expanded aluminium amplimesh '103'. The mesh will be fixed to the frame using aluminium angles riveted to the inside of the door frame members and braced as deemed by design.

aluminium-grille-door

Finish

All aluminium sections are natural anodised as standard. A wide range of colour anodising or polyester powder-koted finishes are available when specified.

Suggested Specification

The sectional overhead aluminium grille door will be as manufactured by 3rd Generation Doors. The door sections will be constructed from aluminium "box type" members and bolted together to form the frame, infilled with aluminium expanded amplimesh '103' and fixed to frame using aluminium angles being clear anodised (or otherwise specified) and fitted with bracing as required.

The door will be supplied with all necessary hardware, spring counter balancing mechanism and tracking (standard headroom, low headroom, high lift or vertical lift as specified) and installed to the manufacturers recommendations.

Steel Bar Grille Doors

The door will be divided into panels of approximately 600mm in height and constructed using rolled hollow steel tube members welded together to form the main frame and divided into equal panels of approximately 1,200mm in width using intermediate stiles.
The face of each door frame section will be fitted with 19mm square rolled hollow steel tubing set at approximately 120mm centres and welded to the frame and braced as deemed by design.

Finish

All mild steel components will be given a coat of zinc chromate primer as standard. Alternative primer coatings are an optional extra e.g. Dimet coating etc.

Suggested Specification

The sectional overhead steel bar grille door will be as manufactured by 3rd Generation Doors. The door sections will be constructed from rolled hollow steel tube with members welded together to form the frame.

The grille design will be of 19mm square steel tubing welded to the face of the frames at approximately 120mm spacings and fitted with bracing as required. The door will be prime painted with zinc chromate primer (or as specified). The door will be supplied with all necessary hardware, spring counter balancing mechanism and tracking (standard headroom, low headroom, high lift, or vertical lift as specified) and installed to the manufacturers recommendations.

Steel Grille Door

The door will be divided into equal panels of approximately 600mm in height and constructed using rolled hollow steel tube welded together to form the main frame and divided into equal panels of approximately 1,200mm in width using intermediate stiles.
Door frames will be fitted with 50mm square steel weld mesh welded to the back face and braced as deemed by design.

 

Finish

All mild steel components will be given a coat of zinc chromate primer as standard. Alternative primer coatings are an optional extra e.g. Dimit coating etc.

Suggested Specification

The sectional overhead steel grille door will be as manufactured by 3rd Generation Doors.
The door sections will be constructed from rolled hollow steel tube members welded together to form the frame. The grille design will be of 50mm square steel weld mesh welded to the back face of the frames and fitted with bracing as required. The door will be prime painted with zinc chromate primer (or as specified).

The door will be supplied with all necessary hardware, spring counter balancing mechanism and tracking (standard headroom, low headroom, high lift or vertical lift as specified) and installed to the manufacturers recommendations.

Tapered Bottom Panels

These are a special design (consult the manufacturer).

Motorisation 

All doors can be electrically motorised or remote controlled (refer to installation detail sheet).

For Further Information (tracking etc.) see installation detail sheet.

Hardware
Brackets and hinges will be manufactured from heavy gauge galvanised steel having a minimum thickness of 1.6mm to a maximum of 4mm. Where doors exceed 5000mm in width, will be fitted with double hinge wheel brackets and long stem shaft wheels.

Top wheel brackets will be adjustable to suit the radius track.

Bottom bracket will be fitted with fixture pin to match the wire cable.

Hinged wheel brackets will be stepped in height to provide an inclined angle to give a wedge type closing.

Steel centre hinges will be fitted to steel doors.

Aluminium centre hinges will be fitted to all aluminium framed doors. Manufactured from extruded aluminium having a thickness of 4mm and fitted with a 6mm diameter pin.

Wheels will be a steel ball bearing complete with a ten 6mm diameter balls hardened and steel shaft of 11mm diameter.

Tracks will be manufactured from 2mm thick galvanised steel "C" channel 26mm wide by 52mm deep.

Vertical tracks will be fitted on an inclined angle to provide a wedge type closing action and fitted with brackets for fixing to brick, steel or as required.

Horizontal tracks will be reinforced with steel angle 40mm x 3mm thick. The tracks will be supported at the ends and where tracks exceed 3,000mm a centre support will be provided.

Torsion Bar will be designed to match the door weight, and manufactured using 25mm diameter tube and or solid steel ban The shaft will be supported at either end and the centre, with end plates and centre anchor plate fitted with bearings.

Chain Hoisting will be fitted where doors exceed 4,000mm in height or when specified.

Counter Balance Springs will be helical wound torsion springs. The assembly will consist of the springs fitted to aluminium alloy spring winding cones, bolted to the spring anchor bracket mounted on the wall. The other end of the spring cone will be locked to the steel shaft.

Cable Drums will be manufactured from aluminium alloy and designed to match door weight and securely fixed to the torsion shaft.

Lifting Wire Cables will be manufactured from galvanised, aircraft quality wire cable and have a safety factor of 6:1.

Locking - Internal quick release slide arm, engaging into the track at one side with provision for padlock (by others).