6 - Association of Interior Specialists

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Partitioning system ancillaries 7standard width doors need to be cut down to a smaller width,an exposed lipping can be applied and used to the hinge side,leaving the opposite side with its standard concealed lipping.Veneered doors are supplied to site either fully finished,with generally three coats of lacquer on the door faces andedges, so if the door is cut down at its edges on site,resealing needs to be undertaken. However some doors mayonly be lacquered on the door faces, in which caselacquering of edges needs to be undertaken. It is importantthat contractors ascertain from their door supplier the finishof the door prior to contract commencement.7.4.2 Laminate doorsLaminate doors are available in two types, CPL (continuouspressure laminate) and HPL (high pressure laminate).1 CPL doors: have an approximate 0.5mm laminate face finish,in a range of veneer types, and provide a durable easy toclean product which has consistent colour and uniformity ofgrain. Not only are they an economical solution, but areunaffected by sunlight, eliminating fading or shading.2 HPL doors: are generally bespoke made, providing aspecific laminate of approximate 1.5mm thickness,typically from the Formica / Polyrey range, to both facesof solid core doors.7.4.3 Paint grade doorsPaint grade doors have a solid or hollow core, generally witha plywood, MDF or low grade hardwood veneered face. It isadvisable to coat the doors with a primer immediately afterreceipt on site, with further coats applied as soon aspossible afterwards.7.4.4 Glass doorsSingle glazed doors are generally of either 10mm or 12mmtoughened glass, and can be used in a variety of waystypically which will be with an aluminium or timber frame orframeless within frameless glazed systems. Frameless doorscan be installed on either a floor spring (in the case of araised access a coffer box needs to be installed) floor orfree swing floor pivot or using a variety of glass door hinges.Installation can be carried out under a fixed glazing headtrack or a deflection head. In each case a concealed fittedbar will support the top pivot pin. Back to back pull handlesor latch lock lever handles can be used although long pullhandles are strongly recommended for full height doors. Asglass doors will always be manufactured square, any plumbdeviation in the floor to ceiling dimension should beaddressed prior to the installation of the frameless glassdoor. Also the gap between the frameless glass door and theadjacent glass panel, frame or ceiling should be consistentand parallel.Double glazed doors can be either framed in aluminium orvirtually frameless with generally 6 or 8mm glass skinsbeing structurally bonded to a hidden aluminium perimeterframe. The leaves can be fitted on offset pivots and can bemounted on either a floor spring with pull handles or latchand lever handles on a free swing pivot.Sliding glass doors can be incorporated into many glazedpartition systems and are available in three popular types:1 Sliding doors are made up of a 10mm or 12mm toughenedglass leaf acting on carriages within a robust head trackwith a guide fitted to the floor. Doors up to 3000mm inheight can be installed this way whilst still satisfying theFigure 39opening apertures required within Part M. Locking can beachieved by the use of locking pull handles or integrallocks on certain seal enhancing doors.2 Using a similar robust head track that positions thecarriages in a central position, allows a 12mm glass leaf toslide into the cavity of the adjoining double glazed system.The cavity is sealed to optimise acoustic performance andto reduce the ingress of dust.3 Sliding doors that hang off a tubular track which is fixedto the surrounding glass above the door opening. Thehanging mechanism is a roller, designed to fit snugly overthe tubular track, and is fixed to the glass door leaf. Astop end is fitted on the tube and at floor level a guideand stop end is fitted to correspond. Some systems can42
Partitioning system ancillaries 7offer an acoustic brush seal for fitting to the edge of thedoor leaf (see figure 39).Fixing mechanisms to glass is a very specialist operationand should always be undertaken by the manufacturer orsuitably trained operatives, using the correct tools.7.4.5 Steel doorsSteel doors are available from the manufacturer either plainor with vision panels and or mesh panels.7.4.6 Door furniture /ironmongeryBS 8300 and ApprovedDocument M include anumber of ‘preferreddimensions and fixingheights’ for doorfurniture.HINGESFixing height: doorswith three hingesshould have onecentred 250mm upfrom the bottom of thedoor, one centred250mm down from thetop of the door and thethird centred 450mmdown from the top (seefigure 40).Figure 40250mm250mm450mmLEVER HANDLES AND LOCKSFixing height: lever handle to be between 900mm and1000mm above the finished floor level, 1000mm ispreferred.Dimensions: not less than 19mm diameter if round section.Not less than 45mm clearance from the rear of the handleto face of door. Not less than 54mm backset from theleading edge of the door. Not less than 72mm centres fromthe lever handle to key turn.INDICATOR BOLTS AND TURNSFixing height: between 900mm and 1000mm above thefinished floor level.Dimensions: the operating bar of the inside turn should benot less than 45mm long.SIGNS AND SYMBOLSFixing height: 1800mm above the finished floor level excepton wheelchair accessible facilities where 1500mm would bemore suitable.Dimensions: symbols should not be less than 70mm high.Kicking plates should not be less than 150mm in height.7.4.7 Door closersDoor closers are used in buildings to self close doors mainlyfor reasons of security, privacy, acoustics, fire resistance,energy conservation and hygiene. There are essentially threetypes of closers used; overhead closers, frame concealedclosers and floor springs. Closers come in two distincttypes, uncontrolled and controlled.Overhead closers are generally fixed to the top of thedoor, or inside the top of the door (concealed closer)providing the door is a minimum of 45mm thick. Occasionallythe closer is fixed to the frame. An arm assembly carriesthe power of the closer to either the door or frame,depending on where the closer is fitted. The arm is usuallyjointed, but for some closer types, it is straight and one endslides in a channel. There are numerous types of the popularoverhead closer – rack and pinion, asymmetrical rack andpinion, cam action, cam and roller, latch action, delayedaction and backcheck which cannot be flung open violently.Close working with manufacturers and ironmongers toprovide exactly what the client requires is absolutely vital.Frame concealed closers are designed to fit into the doorfrom the hinge side. They are attached to a bracket on theframe by rod linkages.Floor springs are designed to be housed in a rectangularbox which is embedded in the floor with only the top floorplate being visible, in the form of a box which contains themechanism. Floor springs are attached to the door byaccessories called ‘bottom straps’ and ‘top centres’. Thespindle on the floor spring is positioned vertically below thepivot pin of the top centre.Uncontrolled closers are the most simply operated doorclosers and will have little speed control, although some willhave a form of hydraulic damping. Usually these are notadjustable and can easily be overridden by hand or variation inair pressure. Helical spring and chain link are typical examples.Controlled closers usually incorporate a hydraulic system,where oil flows through a valve that can be adjusted tocontrol the closing speed of the door. BS EN 1154 is thestandard across Europe for controlled door closing devices.43
Page 1 and 2: ASSOCIATION OFINTERIOR SPECIALISTSA
Page 3 and 4: Contents1 Foreword . 42 Introductio
Page 5 and 6: Introduction 2The extensive range o
Page 7 and 8: Recommendations for tendering and m
Page 9 and 10: Recommendations for tendering and m
Page 11 and 12: Contract planning 4partitioning mat
Page 13 and 14: Partitioning system types and insta
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Page 48 and 49: Contracting support administration
Page 50 and 51: References 9BREEAMBREEAM is an envi
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6 - Association of Interior Specialists

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