Monthly Archives: May 2014

glass partitions

Glass Partitions – Recommendations for Specifying

Glass Partitions London | 21 August 2019

The specifier might wish to consider specifically how any mock ups or prototypes might be covered at this stage, to allow a more detailed final specification to be written. A specification written in partnership with GH Interior Glass can ensure that key issues and details are considered in the design process, if however a performance specification is going to be produced then the specifier should ensure that evidence can be provided to satisfy them that areas of performance can be met. This is normally in the form of test evidence carried out by an independent test laboratory accredited by ucas. any test evidence should reflect the system and details proposed and where applicable sight of the test report and not just the certification should be made (although copies may not be left for confidential reasons).

specifiers, building operators and facility managers should not accept any substitution of materials from the test report without assessments. In fire, acoustic or applied line load (ie crowd pressure on an escape route) assemblies, any alteration of materials may cause a failure. in line with the National Building specification (NBs) K10 / K30, the design criteria should be given under the following headings (where applicable), together with outline details of layout:

• System manufacturer 

• System type

• Location

• Layout

• System performance

• Fire resistance – BS 476-22(1987) or BS eN 1364-1(1999)

• Fire propagation – BS 476-6(1989)+A1(2009) 

• Spread of flame – BS 476-7(1997) or Bs eN 13501-1(2002)

• Acoustic insulation – BS EN ISO 10140-2(2010) / BS eN isO 140-3(1995)

• Structural – (duty rating BS 5234-2(1) • Strength – to BS 5232-2 grade

• Partition height

• Floor to ceiling (mm)

• Deflection allowance (±mm)

• Panel type – module types

• Solid panels – finish / colour, joint treatment, cover trims • glazed panels – non fire rated and type, fire rated and type, glazing trim / colour, manifestation (to meet the requirements of ad M)

• Junctions

• Framework finish – colour • skirting – colour

• incorporated features:

• Door – type and size, finish, vision panel, ironmongery, overpanel

• Blinds – type, finish

• Accessories – switches

Note that doors can also be included within this specification if they are to perform as part of the partitioning especially in the case of fire rating. they should detail:

• Size including thickness, and clear opening size  

• Description, single / double, single action / double action / sliding

• Edge detail, square rebated, rounded

• Over panel if required

• Performance fire / sound / grade

• Size and position of vision panel 

• Finish, veneer, steel, aluminium glass

• Lippings, exposed / concealed long or all round

• Door frame, stops and architrave

• Ironmongery (schedule) and position on door leaf

• Accessories / door seals intumescent seals, drop down thresholds etc

• Environmental / sustainability requirements eg FSC, peFc, sFi

Glass Partitions

Glass Partitions Installation Guide

Glass Partitions London | 14 August 2019

The first Glass Partition panel is cut to size and slid through both fixed parts of the floor shoes and into the first upright post. the panel is jacked up with a floorlifter and the floor pan is slid into position, before lowering the board onto the assembled shoes. the next upright post is put into position and fixed to the head and base with fixing brackets. the process is then repeated. If the partition is being used for a wireway, holes will need to be punched or drilled at the foot of the upright post for cables, which can run under the floor pans.

GLASS PARTITION WALL ABUTMENT

When a wall abutment is reached and an upright post cannot be used, a split (breakdown or abutment) post is used to fix the panel with a flat bar fixed to cover up the panel edge.

GLASS PARTITION LAMINATE SKIRTING

Self-adhesive foam strip is applied to both edges of the back of the plastic, then lightly held in position and marked as to where the foam crosses the upright post. The skirting foam is cut to allow for the posts and then fixed in position. It is important that this type of skirting is installed in conditions that will reflect its temperature in use, as contraction / expansion can otherwise occur.

GLASS PARTITION ALUMINIUM SKIRTING

In a similar way, upright post positions are marked on the skirting lip, then the gap is milled out and using skirting foam at the base fixed flush to the partition. in some situations, if the lip is a suitable depth, it can be turned upside down and with a foam strip stuck to the unlipped edge, the skirting foam cut away for the upright post and then screw fixed to the partition.

GLASS PARTITION DOOR FRAME

Door frames are generally supplied to site in a pack with pre-drilled and mitred stiles and head transom and are machined for lock keep and hinges. Door seals, hinges and sufficient fixings are included. The frame is fitted between two plumbed upright posts, set out dimensions are often included in the door pack but the transom width also determines the necessary opening. Frame stiles are generally supplied oversize so they need to be cut to length to fit the door height. care should be taken to allow for carpet thickness if required. If the system calls for a solid or glazed panel above the door, this should be inserted prior to the fixing of the door head transom. It is essential to use either switch posts or strong posts adjacent to full height doors and good practice on standard height doors to use switch posts with the added benefit of facility for a light switch.

Once the frame is fixed in position with mitres tight, the frame seal and lock keep are fitted. Hinges are fixed in the frame stile in accordance with manufacturers’ instructions. if lift-off hinges are to be used, ensure that the shorter pin is on the bottom hinge. Door / smoke seals are inserted.

Door frame in position, the door is usually fitted at the end of the installation to avoid damage.

In the same way as for solid modules, the head channel is fitted, this time with the deep side uppermost, together with the acoustic foam and the first upright post.

GLASS PARTITION FULL HEIGHT GLAZING

The next upright post is cut to size and positioned to suit the module width (pre-bracketed transoms can be used to accurately set out the upright posts) and fixed to the head and base with fixing brackets, ensuring that the post is plumb in both vertical planes. the installation continues in this manner, installing junction posts as required. A 100mm high flaxboard or timber packer is located in the floor shoe outers (inners are not used) and the floor transom is fitted directly on top of the packer. if it is necessary to raise the transom for levelling purposes then additional packing should be provided underneath the packer.

GLASS PARTITION PART MODULE GLAZING

The floor shoes are fixed and the panel cut to size and placed in position. The next upright post is cut to size and positioned at the edge of the panel, set out by the transom, and then fixed into position. The installation continues in this manor, installing junction posts as required. Pre-bracketed transoms are then fixed across the tops of the panels and fixed to the upright posts ensuring that transoms in consecutive modules are level and in line. this method completes the fixing of half glazed elevations, for mid glazed the upper transom is installed at door head height with panel above. It is now possible to fit the glazing chair (single centre, single offset or double glazed).

The horizontal chairs are cut to fit the module, then the vertical sections. glazing beads are then square cut, unless beads are chamfered, in which case a mitre cut should be made and fitted in place prior to glass of up to 7mm in thickness being fitted.

Glass Partitions

Glass Partition System Ancillaries

Glass Partitions London | 1 August 2019

BLINDS

Venetian blinds are a popular component used with glazed partitioning. They are mainly used between the glass panels in double glazed elevations, but are also used with offset glazing where space permits. Blinds are supplied in 15mm or 25mm widths and are available either plain or perforated aluminium in a wide range of colours. When choosing a blind, the size of the toprail in relation to the double or offset glazed opening should be considered to ensure that the blind has space to be fitted and be operable.

The blind length can be made to order so that when the blind is fitted and opened, there is no bunching at the bottom. Hold down clips are available to hold the bottom of the blind in place to avoid any twist movement.

In double glazed elevations it is not possible to operate the rise and fall mechanism on the blind, but the opening or closing of blinds can be remotely controlled, or the popular method is by way of a control knob which is fixed to the adjacent partition mullion. a cable fixed to the blind is fed through the partitioning framework to the control knob. On monobloc systems the blind will be installed in the manufacturing process and arrive to site enclosed in the glazed unit.

DOORS

Doors are an integral part of a partition system and are the one element that users interact with daily. It is important that doors are coordinated with the partition manufacturer, especially where sound and fire performance is required. Many partition manufacturers also manufacture doors, so are able to supply doors in structural openings as part of a coordinated interior.

Glass partition doors that are used in the interiors sector include veneer, laminate, continuous pressure laminate, paint grade, steel or glass (as described in 7.4.4). a range of standard widths are available, however, manufacturers will produce bespoke sizes on request. conventional door height sizes are produced as standard as are some full partition height doors but doors with an overpanel are generally made to order. care should be taken when ordering doors with particular handing, figure 36 explain the descriptive methods to be used. It is important that gaps between the door and the door frame are consistent. Best practice would be for a 3mm gap at the top and sides of the door and 3 to 5mm at the bottom of the door depending on the type and thickness of the floorcovering and the underlying level of the floor. Bs 1245 offers guidance on the installation of doors.

Timber doors generally tend to be 35mm or 44mm thick for cellular hollow core doors and 44mm and 54mm for solid core doors. Ideally, all doors should be delivered to site immediately prior to their installation and any packaging material left on the door for as long as possible to avoid any site damage. timber doors should be handled and stored as detailed in Bs code of practice cp151 (Wooden doors clause 501 – storage and protection). Timber door manufacturers and fabricators, as part of their environmental policy, should operate a chain of custody procedure on the timber used in their operation. this involves a commitment to purchase all timber and wood based products from sources that are committed to supply material which originates from sources which offer either Fsc or peFc chain of custody or complies with the Fsc standard for non Fsc certified controlled wood. clear specification as to whether Fsc / peFc material made doors are required on each project should be made and users need to vet their suppliers to ensure that they conform to the chain of custody standards. Glazed vision panels of varying shapes and types can be included in the door specification. this includes matching

HINGES

Fixing height: doors with three hinges should have one centred 250mm up from the bottom of the door, one centred 250mm down from the top of the door and the third centred 450mm down from the top

LEVER HANDLES AND LOCKS

Fixing height: lever handle to be between 900mm and 1000mm above the finished floor level, 1000mm is preferred. Dimensions: not less than 19mm diameter if round section. Not less than 45mm clearance from the rear of the handle to face of door. Not less than 54mm backset from the leading edge of the door. Not less than 72mm centres from the lever handle to key turn.

INDICATOR BOLTS AND TURNS

Fixing height: between 900mm and 1000mm above the finished floor level.

Dimensions: the operating bar of the inside turn should be not less than 45mm long.

SIGNS AND SYMBOLS

Fixing height: 1800mm above the finished floor level except on wheelchair accessible facilities where 1500mm would be more suitable. Dimensions: symbols should not be less than 70mm high. Kicking plates should not be less than 150mm in height.

DOOR CLOSERS

Door closers are used in buildings to self close doors mainly for reasons of security, privacy, acoustics, fire resistance, energy conservation and hygiene. there are essentially three types of closers used; overhead closers, frame concealed closers and floor springs. closers come in two distinct types, uncontrolled and controlled.