Overhead Doors

As per current NATSPEC except as follows:

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2.1 Sectional Overhead Doors
 

Sectional overhead doors
Type: A proprietary system comprising a door with 2 off, linked horizontal panels hinged together inclusive of the necessary operating gear, hardware and accessories.  The doors are to be weather lapped at the horizontal joints and fitted with rollers running on inside tracks that guide the doors.

Door structure
The door frame to be of an all welded construction.

Material: Rolled hollow section steel members.

Thickness, Material:  1.6 mm

Design: Beams to be designed for max dead load deflection of 1/300th part of the span and shall be designed for windload and operational requirements.

Preparation: The framework and fittings shall be abrasive blast cleaned to grade 2.5. 
Refer to SG / PAINTING

Protective coat:  Factory applied inorganic zinc primer.  
Refer to SG / PAINTING

Undercoat: Factory applied two-pack polyurethane. 
Refer to SG / PAINTING

Finish Polyurethane paint.  
Refer to SG / PAINTING

Side tracks
Sidetracks, pulleys, link arms and linkages are fabricated from minimum 3.0 mild steel finished equal to door structure.

Counterbalancing
Counterweight system with the counterweights hung on galvanised 6.19 flexible multi-strand steel cable.

Safety Factor: 6:1 (minimum)

Steel sheaves: Machined to correctly bed the cables and having a sheave to cable diam. ratio of at least 19:1, sheaves shall have bearings of sufficient load carrying capacity.

Counterweight cover: Boxed section fixed to wall to a height of 2400mm

Operation
Motorised:

By an electric motor incorporating a proprietary heavy-duty cam drive electric operation system, designed to fully open or close the door

Travel time (Opening or Closing): 4 to 5 seconds (approx.) per metre of opening height.

Motor and transmission: 1 HP (0.75kw) continuously rated 3 phase motor, close coupled to a matched reduction gearbox fitted with a torque limiting safety clutch.  The power drive is to be transmitted through an overhead shaft of suitable torsion capacity.

Controls: Supply a control station for installation with a keyed non-latching pushbutton for both opening and closing door/s.
Note: It is important the pressure be maintained on the pushbutton to open and close the door/s.

• Key tag: Plastic key tag labelled “AUTORISED USE ONLY”.  Attach tag to key with split ring and hand over to the Principal’s Authorised Person / Principal’s Representative at completion of work.
• Safety signs:
  Refer to SG / SIGNS AND DISPLAY

Additional requirements: 415 volt 3 phase power with neutral, terminated at a power isolating switch where required by the Supply Authority, is required adjacent to the operating side of the doorway opening.

Seals

• Brush seals to surround of door
• Proprietary rubber seals to hinge line with a nominal gap of 30mm between top and bottom door leaf.
• Chain guards: Removable

Safety signs: Refer to SG / SIGNS AND DISPLAY

Safety zones

• Provide door operation safety zone markings on floor/pavements to each sidetrack.  The marked safety zones are intended to restrict people from entering the zoned area when the door is in operation.
• The safety zone markings are to be of sufficient distance to prevent people from reaching the track mechanism.
  • Minimum distance from track to line marking: 800mm
• Specification reference:
  • SG / PAINTING
  • SG / SIGNS AND DISPLAY

Chain guards: Removable

Cog/chain guard: Permanently fixed to the base of each track to effectively cover cog/chain mechanism.

External linings
Type: Solid Aluminum sheet

• Metal type and thickness: 100% marine grade solid aluminum panel

Non combustible to AS1570.1

• Finish: external cladding panel surface factory prefinished both sides by the supplier with a fluoropolymer coating.

30 micron thickness

• Panel thickness : 3mm

Type: Glass infill

• Laminated safety glass

Colour: Refer to DG / COLOURS & FINISHES / Administration; Communal Hall & Canteen; Home Base, Library & Special Programs; Toilet Blocks

Internal linings
Generally

Provide perforated corrugated metal wall lining to the upper internal leaf of the door and unperforated metal wall lining to the lower internal leaf only.

Corrugated sheet metal lining material to be fixed vertically.

Type

• Preformed perforated/unperforated metal internal wall lining.
• Thickness (minimum): 0.48 mm B.M.T. (Base Metal Thickness).
• Corrugated, perforated/unperforated LYSAGHT MINI ORB® COLORBOND® prepainted steel sheet and purpose made accessories forming part of a proprietary system.
• Sheeting material: Protected steel to AS/NZS 2728 with a minimum yield stress of 550MPa (Grade 550)

Colour: Refer to DG / COLOURS & FINISHES / Administration; Communal Hall & Canteen; Home Base, Library & Special Programs; Toilet Blocks

• Perforations (nominal) to cover approximately 11% of lining surface. Perforations to be 2.38 mm diameter @ 6.74 mm centres, with a staggered diagonal pitch, set symmetrically across the sheet.

Acoustics

Black liner and thermally bonded textile purpose designed acoustic blanket.

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2.3 Roller Shutters
 

Roller shutters

Curtain

• Size:  50 mm or 100 mm wide x 0.6 mm thick.
• Slat end pieces:  "Windlock"

Bottom curtain rail:  A box section stiffening member interlocking with the bottom edge or lowest slat of the curtain, extending between the inner face of the vertical guides, formed or adapted where necessary to follow the contour of a sloping floor or threshold.  The rail may also be adapted to house the locking device

• Material:  Cold rolled steel.
• Size:  2 mm thickness.
• Finish:  Galvanised.

Windlocks
Wind lock end clips and guides to retain the curtain .

Vertical guides
Material:  Cold rolled steel channels.

Size:  2.5 mm thickness, section to suit "Windlocks".

Finish:  Galvanised.

Drum
Material:  Solid drawn seamless steel tube.

Size:  168 mm outside diameter.

Finish:  Galvanised.

Deflection:  Not more than 1/400 of span manual in centre span.

Brackets

Material:  8 mm mild steel welded.

Finish:  Galvanised.

Bracket fixing:  Not less than three 12 mm diameter anchors to each bracket.

Locking
The roller shutter must be capable of being locked in the fully closed position.

Operation
Method of raising and lowering the curtain:

• Spring loaded manual operation.
• Operating gear located in side.

Force required:  Install so that the force required to operate the shutter manually does not exceed 220 N.

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2.4 Roller Shutters - Administration
 

Roller shutters
Curtain

• Size:  50 mm x 0.6 mm thick.
• Slats: Interlocking, roll formed from galvanised steel.
• Slat end pieces:  "Windlock" or other proprietary locking lugs.

Bottom curtain rail

• Extruded aluminium section fitted with shootbolts or a two-way locking system.
• The roller shutter must be capable of being locked in the fully closed position and at partly opened positions of 200mm intervals.  The intervals are to be regularly spaced for the full effective opening height.

Brackets: mild steel with suitable bosses to receive the roller drum axle

Side guides: Formed from 75 x 40 x 2mm thick galvanised steel.  The guides must be capable of receiving the proprietary curtain locking lugs.

Roller drum: Steel tube encasing helical springs of high-grade spring wire revolving on a steel axle.

Pull handles: 2 x 125mm chrome on brass pull handles centrally located at 600mm centres.  Screw fix two pull handles on the bottom rail of shutter.  Handles to be installed on the clerical – administration/printing side of the shutter

Refer to SG / DOOR HARDWARE

Finish

• Powder coating
• Colour:

OR

• “Galvbond” (galvanised

 

Operation
Method of raising and lowering the curtain:

• Spring loaded manual operation.

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2.5 Roller Grilles 

GUIDE NOTE: Refer to NATSPEC Building Template/commentary. The Roller grilles schedule below is to be read in conjunction with the applicable schedule in the NATSPEC Building Template.

Roller grilles schedule

Door code	RG1	>
Horizontal grille members: Material	Aluminium tube	>
Size (mm)	10mm diameter	>
Finish	Clear anodised	>
Links:  Material	Aluminium	>
Finish	Clear anodised	>
Locating	Sleeve spacers	>
Spacing and pattern	200mm (nominal) centres in ”brick bond”	>
Sleeves: Material	Aluminium tube	>
Finish	Clear anodised	>
End pieces	Nylon, every tube end	>
Bottom curtain rail: Form	Tee section	>
Size	67 x 44mm (nominal)	>
Vertical guides: Material	Aluminium with built in PVC buffers	>
Finish	Clear anodised	>
Fixing method	Concealed	>
Drum: Material	Steel	>
Size	>	>
Finish	Protective coat	>
Brackets: Material Finish Fixing	Mild steel Protective coat To manufacturer’s instructions	>  >  >
Operation method	Manual - Spring counter balanced mechanism	>
Hardware: Locking                     Pull handle	2 x lockable shoot bolts fitted to bottom rail.  Shoot bolts to have provision for padlocks.   The roller grille must be capable of being locked in the fully closed position and at partly opened positions of 200mm intervals.  The intervals are to be regularly spaced for the full effective opening height.   2 x 125mm chrome on brass pull handles centrally located at 600mm centres.  Screw fix two pull handles on the bottom rail of shutter.  Handles to be installed on the clerical – administration/printing side of the shutter. Refer to SG / DOOR HARDWARE	>                      >

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2.6 Roller Shutters - Internal Timber Slat Type
 

Type: Machined timber roller shutter with mated edge profiles.  The roller shutter system must be designed to allow continuous smooth operation.

• Timber species:

Moulded timber slats:

• Mortice slats into side guides at equal spacings with matched end profiles.
• Dimensions (nominal) (W x T): 38 to 45mm wide x 16 to 18mm thick.

Side guides:

• Recessed guides to be compatible with slats.  The recess to be of sufficient depth to allow for easy continuous operation of roller door.

OR

• Extruded aluminium channel with nylon felt buffers to allow for easy continuous operation of the roller door.  The channel to be recessed flush into timber members.

Bottom rail: To be compatible with slats.

Roller drum:

• Must be designed to give minimum deflection over span.
• Fitted with a spring counter balance mechanism.
• 150 to 230mm (nominal) diameter spiral ducted lock tube attached to self lubricating drum wheels and bearing, rotating on a 34 to 40mm (nominal) OD shaft.

Support brackets:

• Galvanised mild steel plates or angles.
• Thickness (BMT): 3mm (minimum).
• Fixing: Securely fixed to wall or head of opening.

GUIDE NOTE: Delete mullions if not required

Mullions: Lift out type

• Machined timber to match curtain.
• Specifically designed to suit installation.

Operation: Manual

Size: As shown on the drawings.

Finish: Clear timber polish.