Bringing structures to life - RMD Kwikform...Propping to Bunker Walls, Saint Nazaire Superslim push-pull propping to provide supprt to freshly cast bunker walls until they are tied

Bringing structures to life

Refurbishment

PRODUCT PORTFOLIO

Introduction to Building RefurbishmentThe preservation of the appearance of historical buildings, whilst modernising them to meet the needs of today’s hi-tec lifestyle / environment is a challenging trend being seen more and more throughout the UK. At RMD Kwikform, we combine innovation with all the experience gained over the last 85 years, successfullysecuring some of the largest facade retention and building refurbishment projects in the world.

With our wide range of propping products and unique imaginative approach to design we can offer solutions to all your building refurbishment challenges. This coupled with our unrivalled customer service means that we have earned our place as experts in this specialist fi eld.

With a network of branches local to you, get in touch today to speak to one of our dedicated sales team:

Customer Service Helpline: 0800 389 8231www.rmdkwikform.com

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Refurbishment Complete solutions for all of your Refurbishment needs

REFURBISHMENT

Shoring and NeedlingRMD Kwikform provide a full professional service to all of your building refurbishment requirements, such as needling and propping to form new openings, general shoring and backpropping for load transfer during modifi cations or repairs to existing structures.

Whether you need lightweight, portable aluminium props, robust steel towers or trusses, we have developed our range of products to cater for the demands of this type of work. For the most complex applications, product versatility can beextended still further by the addition of custom fabricated parts built to precisely meet the demands of the job.

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Façade RetentionRMD Kwikform’s proven capability in this specialist fi eld of temporary works means we are always ready to consult, advise, design and deliver safe and economical solutions.

Each façade retention presents unique challenges to our dedicated team of specialists who thrive on fi nding the optimum solution to suit our customer’s needs, made possible by the wealth of experience within our team.

RMD Kwikform’s capability in this sector is recognised by the industry to the extent that we assisted CIRIA in the production of what is now recognised as the industry guide in this specialist fi eld, CIRIA579 Retention of Masonry Façades.

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SUPERSLIM

Needling & ProppingPush-Pull PropsFaçade RetentionShoring Towers

5-67-10

11-1617-18

MEGASHOR

Needling & ProppingPush-Pull PropsFaçade RetentionMegashor TrussesOffshore ApplicationsShip Building

19-2021-2223-2829-3031-3435-36

CASE STUDIES

Waverley GateCrispin Lofts

37-4041-46

SERVICES

Customer Services 47-48

DESIGN PROCEDURE

Design Procedure 49-51

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NEEDLING & PROPPING

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PDSA LiverpoolSlimshor Needling & Propping to facilitate the installation of steelwork for a new opening in the shop front.

Stalybridge Railway StationSlimshor Needling & Propping supporting both the external wall and the internal fl oor slabs.

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PUSH-PULL PROPS

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East London Line, Bishopsgate ViaductSuperslim push-pull props to facilitate the erection of precast portal frames.

Bonded Whiskey Warehouses, MulbernSuperslim push-pull props used to stabilise the outer walls of the warehouses after heavy snow caused the roofs to collapse.

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Spider PropsSuperslim push-pull props providing support to a carpark slab whilst structural repair works are being carried out to the column.

Precast Column Propping, FranceSuperslim push-pull props used to stabilise precast concrete columns until they are tied into the insitu slabs that follow.

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Propping to Bunker Walls, Saint NazaireSuperslim push-pull propping to provide supprt to freshly cast bunker walls until they are tied into the rest of the structure.

Bus Station, West HamSuperslim push-pull props used to stabilise the curved beams temporarily until they are tied together with the permanent roof beams and cladding.

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FACADE RETENTION

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Asda, OldburySuperslim push-pull prop façade retention with raking shores using the self weight of the building as kentledge.

Stockport College and Asda, Hunts CrossMore complex Superslim push-pull props used to stabilise the façade of thebuilding. Here, scaffold tube lacing & bracing was used to enhance the loadcapacity of the longer props.

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Propping to MonumentPermanent Superslim façade retention to monument/gate structure.

Milk Depot, CantonTrianglated Superslim push-pull prop façade retention to perimeter wall.

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Bouygues, ParisSuperslim façade retention and cabin ganty support for site offi ces.

Hotel Aqua, BarcelonaRaking Superslim push-pull props used to stabilise the façade of the building.

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Alcoy Square, AlicanteSuperslim façade retention to support external walls of building. Here, double Superslims were used to cater for the higher loadings towards the bottom of the gantry.

Ca Doro Building, ScotlandSuperslim façade retention to support external walls during the demolition of the internal walls and fl oors.

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Hotel Aqua, BarcelonaHorizontal Superslim fl ying shores used to hold the external walls of the building together.

Express & Star, WolverhamptonSuperslim façade retention to front face of the building whilst the internal fl oors were demolished and reinstated.

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SHORING TOWERS

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Santa’s Seat, Manchester Superslim frame used regularly each year at Christmas to support Manchester’s famous Santa decoration outside the Town Hall.

Support to Beam, Birmingham New StreetSuperslim gantry used to facilitate the installation of the west infi ll main girder at Birmingham New Street Station.

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NEEDLING & PROPPING

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Old Clock Tower, HolyroodMegashor in a heavy duty needling application supporting both the external wall and internal fl oor slabs.

Marshalls MillMegashor in a heavy duty needling application using larger steel beams to cater for greater loadings.

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PUSH-PULL PROPS

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Typical Propping Application - Head ConnectionMegashor push-pull props used to prop a basement wall utilising resin anchors fi xed into wall by customer.

Propping Application - Baseplate ConnectionMegashor fl at brace and special fabrication to facilitate positions of fi xings for rear tilt plates which were too close to the front ones to accommodate high shearloadings.

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FAÇADE RETENTION

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Marischal College, AberdeenMegashor tower façade retention with superslim diagonal props and horizontal walers to facilitate ties through building apertures.

Marischal College, AberdeenMegashor fl ying shore internal façade retention.

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Altolusso, Cardiff Megashor tower external façade retention with portal frames to provide access underneath for entering and exiting the building.

Cardiff Castle, Cardiff Megashor façade retention to external castle walls.

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Ship Factory, ChichesterMegashor tower façade retention with superslim horizontal walers to facilitate ties through building apertures.

General Post Off ice, EdinburghMegashor tower and horizontal Megatruss façade retention.

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G1 Building, GlasgowHorizontal Megatruss girder façade retention wrapping around 3 faces of thebuilding.

Oswald Street, GlasgowMegashor tower façade retention to freestanding external wall of building with advertising banner strung to end frame.

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Met Quarter, LiverpoolIndividual Megashor towers providing façade retention to external walls of building.

Seel Street, LiverpoolMegashor tower façade retention with portal frames providing a clear access way for cars to drive through (can be seen on right hand towers).

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MEGASHOR TRUSSES

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New Street Station, Birmingham Megashor trusses used for the demolition and removal of huge concrete beams where the weight had to be transferred to hardstanding positions on the supporting slab below.

New Street Station, BirminghamShown here during concrete beam removal.

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OFFSHORE APPLICATIONS

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Magnus Platform, North SeaMegashor towers installed to facilitate the replacement of the crane boom on the Magnus platform in the North Sea.

Magnus Platform, North SeaShown again here from a different perspective.

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Magnus Platform, North SeaFor crane change out skid tracks are used to remove old crane boom and move new boom into position where it can be installed.

Montrose Platform, North SeaMegashor towers installed to facilitate the replacement of the crane boom on the Montrose platform in the North Sea.

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South Arne Platform, North SeaMegashor towers installed to facilitate the replacement of the crane boom on the South Arne platform in the North Sea.

South Arne Platform, North SeaShown again with crane beam insitu.

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SHIP BUILDING

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Dockyard, Rosyth Modular Megashor stair towers to provide access for site personnel during ship-building operations.

Dockyard, Rosyth Modular girder footbridges to provide access for site personnel during ship-building operations.

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CASE STUDYWaverley Gate

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Introduction:RMD Kwikform has been involved in the design and supply of the huge and diverse façade retention at the new Waverley Gate development in Edinburgh. This project was the fi rst that RMD Kwikform has designed in accordance with the new CIRIA 579 document.

RMD Kwikform equipment was selected in preference to structural steel due to the short lead in times and the increased fl exibility. RMD Kwikform designed andsupplied retention structures to over 7200m2 of façade using predominantly Megashor - that’s the area of around 30 tennis courts!

Design Development Process:Rather than just being one large project, the retention split itself logically into 5separate, but in some cases linked areas - Waterloo Place, Waverley Station,Waverley Car Park, Calton Road and North Bridge.

Location:Edinburgh City Centre

Contractor:Balfour BeattyConstruction Ltd

DemolitionContractor:Dem Master

Developer:Castlemore Ltd

Scheme:Megashor & Megatruss Façade Retention

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Waterloo Place was the most straight forward elevation of the building to restrain, being 30m high and having a relatively unobstructed wide paved area at the front. The internal legs of the façade frame were extended downwards into the atrium onto piled foundations, while the horizontal loads were resisted by the existing foundations at this low level.

The Waverley Elevation provided a greater challenge. This huge façade measuring in at 3100m2 was split into two distinct areas, Waverley Station & Waverley Car Park. New basement construction within the existing building at the Waverley Station end of the façade meant that the eventual height of the retained masonry would be nearly 40m. The retention structures for the two sections were completely different from each other. The Waverley Station end of the façade had to be supported from within, whilst the retention frame for the Car Park section could be external. The car park end, although measuring in at a comparatively less 28m high, posed its own challenges as the available footprint for the retention structure was limited to a narrow tapering strip external to the building. In this area the structure was restrained using cantilever Megashor towers braced in Warren girders confi guration. Legs were doubled up near the base of the structure and the towers were narrow and closely spaced in order to fi t into the limited 3m footprint and to satisfy the defl ection criteria. The narrow width of the towers gave rise to substantial foundation loads, which were accommodated by fi xing the structure down to a piled raft foundation.

At one end of the Car Park Elevation an existing footbridge obstructed the installation of the temporary works piles. This meant that the confi guration of the support structure had to be changed again. The width of the towers were increased by sitting bracing members to pass through existing openings in the facade. This additional width meant that smaller piled foundations could be used in this area.

The Waverley Station part of the façade was restrained using Megashor towers. Multiple tower frames were used and a crank was added at the base of the tower to provide the stiffness required to limit defl ections and foundation loads. The towers were founded on heavy structural steel rafts supported on inclined piles. Once demolition was complete the basement level was reduced by 5m. The towers and inclined piles were modelled together to check the performance of the entire structure.

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The North Bridge Elevation was 55m long and 30m high, with little pavement width on the outside of the structure. Again, this meant that the retention structureneeded to be sited on the inside. This complicated the façade retention design, due to the number of things in the way. A piling rig needed to work at ground level close to the existing façade, meaning that the frame could not extend to ground level. A mutual restraint was therefore the only option and so 6m deep Megatrusses were designed to span the entire length of the building between the return walls. The walls that restrained the façade prior to the truss becoming active had to beavoided. Thick load bearing walls at each end also had to be missed. This resulted in the ends of the trusses needing to be cranked in plan - one end shallower than the other. Many columns that would support the new construction also had to be avoided as did the zone required for the construction of a new shaft. 3D analysis was used to determine the structural behaviour of the façade retention spaceframe. The frame took support and lateral restraint from a Megashor tower atmid-span.

The Calton Road end of the building measures 28m wide and 29m high. Access for site traffi c was required through existing opening and the retention structure could not extend to ground level in these areas. The presence of substantial return walls on either side of the structure lent themselves to retaining the façade in a mutual manner. Stiff Megastrusses 4m deep were used to span between the fl ankwalls at fi ve levels. Use of the in plane stiffness of the retained façade was made in order to support one of the fl ank walls laterally.

The project used 480 tonnes of Megashor and Megashor Plus, 190 tonnes of Superslim Soldiers and took 60 man weeks to design with 130 CAD drawings detailing the installation.

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CASE STUDYCrispin Lofts

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Introduction:This case study relates to a Victorian building called Crispin House in Leeds. The developer put together a £7m plan to convert the building, which was a former orthopedic factory, into 76 apartments and penthouses.

The existing 25m high building had four fl oors and a basement and was of red brick construction with limestone lintels, corbels and ornate details. The building issituated on a tapering plot of land between two streets, Trafalgar Street andNew York Road. The internal structure consists of steel beams built into pockets in the brickwork piers, spanning onto cast iron columns along the centre line of the building, with timber fl oors. The building was heavily glazed and the footpathoutside sloped steeply on both elevations.

The refurbishment of the building introduced more fl oors within the existing building and extended the building upwards above the current roof level. The existinginternal steel frame did not suit the new usage and so was replaced with a new

Location:Leeds City Centre

Contractor:Totty Construction

DemolitionContractor:Sharpe & Scarfe

Developer:Cityfusion

Scheme:Megashor FaçadeRetention

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one. In addition the basement was to be deepened to provide underground car parking facilities. This was to be achieved by staged underpinning of the existing foundations. The two 65m long elevations of Crispin House, one along Trafalgar Street and the other New York Road were to be restrained with an external façade retention system.

Design Development:The information required to design the façade retention came from a number of sources. Electronic copies of the existing structure drawings were used together with results of condition surveys and verticality surveys as well as detailedspecifi cations. Meetings with the contractor and engineer identifi ed site specifi c requirements such as access points, cranage capacity and programme constraints. RMD Kwikforn offered their expertise in this specialist fi eld by advising onthe standard practices, options available and guidelines for design. Outlinedesigns were produced and the fi nal design was developed considering the design parameters covered in the next section.

Design:The loading to be applied to design the façade retention came from a number of sources. The wind load and lateral load due to out-of-plumb of the retained façade. The wind loading was calculated in accordance with BS5975, and CP3 Chapter 5. (since superseded by BS6399 Pt2) Crispin House is situated in the city centreof Leeds and was surrounded by buildings of a similar height of 20 to 25m. Thisenabled appropriate wind pressures to be established for the design.

Detailed surveys of the building at each fl oor level enabled the wall thickness to be established. The verticality survey and condition survey showed that the façade was in good condition and at better than 1:67 out of verticality. This enabled the percentage of brickwork dead weight acting as a de-stabilising force to be reduced from 2.5% to 1.5% of the façade weight.

Support to walls is provided by walers both inside and outside effectivelysandwiching the wall. These walers are secured with ties through the window openings and positioned to avoid new and existing fl oors whilst still providingadequate lateral restraint to the façade. Due to the basement deepening works we needed to avoid surcharge on the footpath adjacent to the building. This was achieved by using the self weight of the façade. The inner leg loads were transferred to the façade via a beam introduced into the height of the tower. This

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beam projected into the building through the windows and was connected to shear plates bolted to the inside face of the façade. To standardise the steel frameconnecting to the building beams were made to enter the building all at the same level. This was further complicated by the 3m slope of the footpath outside on which the towers were founded. It was overcome by tailoring the make-up of the tower beneath the beam and having a standard tower confi guration above the beam. This enabled a good proportion of the towers to be a standardised design which facilitated a modular erection process.

RMD Kwikform worked with the engineer in the design and detailing of thefoundations providing design loads for each leg position. The engineers basicdesign was then modifi ed to suit the street slope of the site by stepping the upper surface of the foundation. The kentledge on the outer leg was installed on top of the low level stepped strip footing. The anchorage system to the footing wasdesigned by RMD Kwikform.

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Pedestrian access was maintained throughout the contract by the introduction of RMD Kwikform’s unique Megashor Half Portal frames at the base of the towersystem. These frames are specifi cally designed to enable the bottom of the façade retention towers to be left clear of bracing and can be spaced apart with Megashor to suit the width of the tower used.

It was established that the party wall required restraint. This was achieved bycontinuing walers around the party wall having fl ying shores, knee braces, across the corners thus transferring loads back to the main retention system. This meant that internal towers were avoided thus leaving the basement clear for deepening and underpinning works.

The development of the inside of Crispin House left a section of the original structure untouched. The main façade retention system was already installed when it was discovered that a large concrete roof beam needed extensive concrete repairs. It also transpired that the existing steel and timber fl ooring was leftunsupported at the demolition line once the load bearing walls and stairwells were removed. Further more the removal of the stairwells and load bearing walls leftthe façade unsupported beyond the extent of the current façade retention system.

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The project used 72 tonnes of Megashor, 46 tonnes of Superslim Soldiers and took 3 man weeks to design with 11 CAD drawings detailing theinstallation which restrained the two elevations amounting to 2420m2 of facade.

A single system was designed to accommodate all of these issues and took the form of a braced frame across the entire 13m width of the building. The frame had header beams at roof level to support the concrete beam during repairs. TheMegashor verticals had brackets fi xed to them which picked up the unsupported steel frame. The ledgers had Superslims suspended on ties which cradled theunsupported timber fl oors. Finally the whole frame was braced across the width of the building and connected to walers extended from the external façade retention.

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Customer ServiceOur customer service sets us apart...With over 85 years of experience in the temporary works industry we understand the many and varied challenges that our customers face, whatever the size of your project. Whilst our product range provides us with the capability of supporting your project, it is our people that will make the difference.

Sales & Supply• Provision of fully itemised quotations with a series of hire & sale options as appropriate

to suit project duration.

• Delivery of components in a manner to suit the availability of site plant ascommunicated by the customer.

Erection Co-ordination• RMD Kwikform has a library of detailed portfolios of companies throughout the UK who

have experience in the assembly and erection of façade retention systems and heavyduty equipment.

• We can provide you with details of such companies and co-ordinate the provision oferection pricing by them on your behalf.

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A Positive Step Forward in Customer Care• RMD Kwikform is leading the way with its unique after sales working closely with the

customer throughout the contract, offering on site guidance for the identifi cation ofequipment, co-ordinating deliveries and returns, as well as offering product appreciationcourses and on site assistance on the erection of the equipment.

• No other supplier offers such an extensive after sales service helping to make thecontract a successful one.

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Safety• We fully recognise our Health & Safety CDM Related Responsibilities.

• Safety is embedded throughout the RMD Kwikform Service Package, from initialenquiry taking through to dismantling of the equipment, from materials handling toproduct development.

• As well as our health and safety policy we have a corporate and specifi c policy devel-oped to drive our compliance with the requirements of the CDM regulations.

• This is underpinned by our suite of comprehensive CDM documents such as EquipmentGuidance Notes and Application Risk Assessments.

Pre-Tender• Work with the property owner, developer, architect and consultant to provide specialist

advice on the façade retention options available.

• Draw from our extensive library of successful projects to provide previous similar whereappropriate, or devise unique solutions where required.

• Provide outline designs for inclusion in pre-tender packages together with budgetpricing for project feasibility studies.

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Tender• Provide designs to meet Tenderer’s specifi c requirements.

• Facilitate contacts with experienced erectors of RMD Kwikform equipment on façaderetention schemes.

• Provide pricing for the supply of RMD Kwikform solutions.

Contract Award• Work with successful contractor in further development of the design.

• Meet with the contractor’s engineer to advise on the optimisation of the façade retentiondesign.

• Assimilate details of customer designed foundations onto the RMD Kwikform drawings.

• Liaise with erector and site team to fi ne design to suit erection restrictions such asrestricted crane movements, manual handling and site access.

Design Service• Attend site meetings to discuss customer requirements for the façade retention

structure.

• Collect relevant information from site location and customer to facilitate wind loaddesign in accordance with current wind load code BS6399-2: Code of Practice for WindLoads.

• Collect relevant information from customer to produce detailed design brief using RMDKwikform Design Brief Document.

• Design facade retention structure in accordance with CIRIA Guide C579, Retention ofMasonry Façades - Best Practice, BS5975: Code of Practice for Falsework and BS449:The Use of Structural Steel in Building.

• Use drawings of existing structure and new structure to ensure temporary works are, asfar as practicable, designed to avoid clashes.

• Carry out detailed designs of the façade retention structure ensuring practicable designincorporating when necessary special fabrications to optimise the design.

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• Provide detailed design based upon information collected. Submit to the contractor,contractor’s engineer and others as necessary for comments.

• Take responsibility for the adequacy of the RMD Kwikform supplied components withinthe constraints of the provided Design Brief.

• Provide BSEN ISO 9000/2001 compliant back-up in the form of a structureddrawing issue process working towards Working Drawing Status. Provide calculationssupporting the design.

• Provision of all anchorage to customer’s foundations and details of reactions imposedon the foundations, for customer foundation and kentledge design.

• Check the erection of the completed RMD Kwikform structure is in accordance with theRMD Kwikform drawing.

• Assist and advise with the aspects of the scheme which remain the customer’sresponsibility such as; foundation design, kentledge provision; checks on theadequacy of the masonry to span between the lateral restraint point provided by theRMD Kwikform design; survey of the existing building; interfaces with statutoryundertakers, Local Councils, Highways Authorities, owners or occupants ofneighbouring properties etc.

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Notes

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Notes

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Notes

Contacts

HEAD OFFICERMD Kwikform, Brickyard Road, Aldridge, Walsall, WS9 8BW, UK Tel: +44 1922 743743Fax: +44 1922 743400Email: [email protected]

LONDON AND SOUTH EAST24 River Road, Barking, Essex, IG11 0DGTel: +44 1708 552975Fax: +44 1708 557048Email: [email protected]

MIDLANDSMidland Sales Centre,Stubbers Green Road, Aldridge, Walsall, WS9 8BL Tel: +44 1922 450800Fax: +44 1922 450896Email: [email protected]

NORTH8 Peel Road, Skelmersdale, WN8 9PT Tel: +44 1942 273815Fax: +44 1942 273819Email: [email protected]

SCOTLAND1650A London Road, Glasgow, G31 4QGTel: +44 141 554 7425Fax: +44 141 554 8392Email: [email protected]

WALES AND SOUTH WESTPenarth Road, Cardiff, Glamorgan, CF11 8UPTel: +44 29 2037 4521Fax: +44 29 2023 8703Email: [email protected]


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www.rmdkwikform.comOur policy is one of continuous improvement and we reserve the right to change, alter or modify any detail, design, weight, dimension or code without prior notice being given.

The arrangements of equipment shown in photographs may have been assembled by others and therefore not refl ect best working practices or legislation requirements.

A member of Interserve Plc.

Documents

Bringing structures to life - RMD Kwikform...Propping to Bunker Walls, Saint Nazaire Superslim push-pull propping to provide supprt to freshly cast bunker walls until they are tied